Four White LED Backlight Driver ADM8843
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1 Data Sheet FEATURES Drives 4 LEDs from a.6 V to 5.5 V (Li-Ion) input supply /.5 / fractional charge pump to maximize power efficiency 0.3% typical LED current matching Up to 88% power efficiency over Li-Ion range Powers main and sub display LEDs with individual shutdown Package footprint only 9 mm (3 mm 3 mm) Package height only 0.55 mm Low power shutdown mode Shutdown function Soft start limiting in-rush current APPLICATIONS Cellular phones with main and sub displays White LED backlighting Camera flash/strobes and movie light applications Micro TFT color displays DSC PDAs Four White LED Backlight Driver GENERAL DESCRIPTION The uses charge pump technology to provide the power to drive up to four LEDs. The LEDs are used for backlighting a color LCD display that has regulated constant current for uniform brightness intensity. The main display can use up to three LEDs, and the sub display uses one LED. The CTRL and CTRL digital input control pins control the shutdown operation and the brightness of the main and sub displays. To maximize power efficiency, the charge pump can operate in,.5, or mode. The charge pump automatically switches among /.5 / modes, based on the input voltage, to maintain sufficient drive for the LED anodes at the highest power efficiency. Improved brightness matching of the LEDs is achieved by a feedback pin that senses individual LED current with a typical matching accuracy of 0.3%. FUNCTIONAL BLOCK DIAGRAM C µf C µf C4 4.7µF CHARGE PUMP /.5 / MODE C3.µF MAIN SUB CTRL CTRL CONTROL LOGIC V REF OSC FB FB FB3 FB4 R SET LED CONTROL CIRCUIT CONTROL CONTROL CONTROL 3 CONTROL 4 CONTROLLED SINKS Figure. Rev. D Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 906, Norwood, MA , U.S.A. Tel: Analog Devices, Inc. All rights reserved. Technical Support
2 Data Sheet TABLE OF CONTENTS Features... Applications... General Description... Functional Block Diagram... Revision History... Specifications... 3 Absolute Maximum Ratings... 4 Thermal Characteristics... 4 ESD Caution... 4 Pin Configuration and Function Descriptions... 5 Typical Performance Characteristics... 6 Theory of Operation... 9 Automatic Gain Control... 0 Brightness Control with a Digital PWM Signal... 0 LED Brightness Control Using a PWM Signal Applied to VPWM... LED Brightness Control Using a DC Voltage Applied to VBRIGHT... Applications... 3 Layout Considerations and Noise... 3 White LED Shorting... 3 Driving Four LEDs in the Main Display Only... 3 Driving Fewer than Four LEDs... 3 Using Smaller Capacitor Values... 4 Power Efficiency... 5 Outline Dimensions... 6 Ordering Guide... 6 REVISION HISTORY 3/07 Rev. C to Rev. D Changed CP-6-3 to CP Throughout Changes to Figure... 5 Updated Outline Dimensions... 6 Changes to Ordering Guide... 6 /0 Rev. B to Rev. C Changes to Figure /00 Rev. A to Rev. B Removed CP-6- Package... Universal Change to Figure... 5 Change to Figure Changes to Figure Changes to Figure Updated Outline Dimensions... 6 Changes to Ordering Guide... 6 /006 Rev. 0 to Rev. A Change to Thermal Characteristics Section... 4 Changes to Outline Dimensions... 6 Changes to Ordering Guide /004 Revision 0: Initial Version Rev. D Page of 6
3 Data Sheet SPECIFICATIONS VCC =.6 V to 5.5 V; TA = 40 C to +85 C, unless otherwise noted; C, C =.0 µf; C3 =. µf; C4 = 4.7 µf. Table. Parameter Min Typ Max Unit Test Conditions INPUT VOLTAGE, VCC V SUPPLY, ICC.6 5 ma All four LEDs disabled, VCC = 3.3 V, RSET = 7.08 kω, CTRL =, CRTL = SHUTDOWN 5 µa CHARGE PUMP FREQUENCY.5 MHz CHARGE PUMP MODE THRESHOLDS.5 to 3.33 V to V Hysteresis 40 mv to V.5 to 4.8 V Hysteresis 40 mv ISET PIN LED : LED Matching 0.3 % ILED = 0 ma, VFB = 0.4 V ISET Pin Voltage.8 V ILED-to-ISET Ratio 0 ILED-to-ISET Ratio Accuracy ±5% MIN COMPLIANCE ON FBx PIN 0.5 V ISET = 5 ma CHARGE PUMP OUTPUT RESISTANCE. Ω mode 3.5 Ω.5 mode 8.0 Ω mode LED 0 ma PWM khz DIGITAL INPUTS Input High 0.7 VCC V Input Low 0.3 VCC V Input Leakage Current µa CHARGE PUMP POWER EFFICIENCY 88 % CTRL =, CRTL =, VCC = 3.4 V, VFB = 0. V, IFB = 0 ma VOUT RIPPLE 30 mv VCC = 3.6 V, ILED = 0 ma, all four LEDs enabled Guaranteed by design. Not 00% production tested. Rev. D Page 3 of 6
4 ABSOLUTE MAXIMUM RATINGS TA = 5 C, unless otherwise noted. Table. Parameter Rating Supply Voltage, VCC 0.3 V to +6.0 V ISET 0.3 V to +.0 V CTRL, CTRL 0.3 V to +6.0 V VOUT Shorted Indefinite Feedback Pins FB to FB4 0.3 V to +6.0 V Operating Temperature Range 40 C to +85 C VOUT 80 ma Storage Temperature Range 65 C to +5 C Power Dissipation mw ESD Class Short through LED. Based on long-term current density limitations. Data Sheet Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. THERMAL CHARACTERISTICS 6-lead LFCSP (CP-6-3) package: θja =50 C/W ESD CAUTION Rev. D Page 4 of 6
5 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS FB FB FB3 FB C+ C CTRL C+ 3 TOP VIEW (Not to Scale) CTRL C NOTES. CONNECT THE EXPOSED PADDLE TO. Figure. Pin Configuration Table 3. Pin Function Descriptions Pin No. Mnemonic Description VOUT Charge Pump Output. A. µf capacitor to ground is required on this pin. Connect VOUT to the anodes of all the LEDs. C+ Flying Capacitor Positive Connection. 3 ISET Bias Current Set Input. The current flowing through the RSET resistor, ISET, is gained up by 0 to provide the ILED current. Connect a resistor, RSET, to to set the bias current as VSET/RSET. Note that VSET =.8 V. 4, 9, 0 Device Ground Pins. 5 to 8 FB to FB4 LED to LED4 Cathode Connection and Charge Pump Feedback. The current flowing in these LEDs is 0 times the current flowing through RSET, ISET. When using fewer than four LEDs, this pin can be left unconnected or connected to. C Flying Capacitor Negative Connection. CTRL Digital Input. 3 V CMOS Logic. Used with CTRL to control the shutdown operation of the main and sub LEDs. 3 CTRL Digital Input. 3 V CMOS Logic. Used with CTRL to control the shutdown operation of the main and sub LEDs. 4 C Flying Capacitor Negative Connection. 5 VCC Positive Supply Voltage Input. Connect this pin to a.6 V to 5.5 V supply with a 4.7 µf decoupling capacitor. 6 C+ Flying Capacitor Positive Connection. EP Expose Paddle. Connect the exposed paddle to Rev. D Page 5 of 6
6 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS LED (ma) LED (ma) C +5 C +85 C R SET (kω) SUPPLY VOLTAGE (V) Figure 3. ILED (ma) vs. RSET Figure 6. ILED (ma) vs. Temperature ( C), Four LEDs Enabled LED (ma) LED (ma) TEMPERATURE ( C) Figure 4. ILED (ma) Variation over Temperature ( C), VCC = 3.6 V SUPPLY VOLTAGE (V) Figure 7. ILED (ma) vs. Supply Voltage (V) LED (ma) 8 EFFICIENCY (%) DUTY CYCLE (%) Figure 5. ILED (ma) vs. PWM Dimming (Varying Duty Cycle), Four LEDs Enabled, Frequency = khz DUTY CYCLE (%) Figure 8. LED Efficiency vs. Varying Duty Cycle of khz PWM Signal, Four LEDs Enabled, 0 ma/led Rev. D Page 6 of 6
7 Data Sheet C +5 C CTRL/ SUPPLY (ma) C SUPPLY VOLTAGE (V) Figure 9. Supply Current vs. Supply Voltage over Temperature, Four LEDs 0 ma/led CH.00V B W CH 60mA B W M 0.0 s CH.44mV CH3.00V Figure. Soft Start Showing the Initial In-Rush Current and VOUT Variation, Four 0 ma/led, VCC = 3.6 V CH 0.0mV B CH 0.0mV B W W M 0.0 s CH.8mV CH 0.0mV B CH 0.0mV B W W M 400ns CH.4mV Figure 0..5 Mode Operating Waveforms Figure 3. Mode Operating Waveforms POWER EFFICIENCY (%) V F = 3.6V V F = 3.V V F = 3.8V V F = 4.0V V F = 4.3V CH 0.0mV B CH 0.0mV B W W M 400ns CH.4mV Figure. Mode Operating Waveforms (V) Figure 4. Power Efficiency vs. Supply Voltage over Li-Ion Range, Four 0 ma/led Rev. D Page 7 of 6
8 Data Sheet POWER EFFICIENCY (%) V F = 3.6V V F = 3.V (V) V F = 3.8V V F = 4.0V V F = 4.3V Figure 5. Power Efficiency vs. Supply Voltage over Li-Ion Range, Four 5 ma/led CTRL/ : 44.4ms CH.00V CH.00mV M 0.0ms CH 4.36mV Figure 6. TPC Delay C FALL 00 s LOW SIGNAL AMPLITUDE Rev. D Page 8 of 6
9 Data Sheet THEORY OF OPERATION The charge pump driver for LCD white LED backlights implements a multiple-gain charge pump (,.5, ) to maintain the correct voltage on the anodes of the LEDs over a.6 V to 5.5 V (Li-Ion) input supply voltage. The charge pump automatically switches among /.5 / modes, based on the input voltage, to maintain sufficient drive for the LED anodes, with VCC input voltages as low as.6 V. It also includes regulation of the charge pump output voltage for supply voltages up to 5.5 V. The s four LEDs are arranged into two groups, main and sub. The main display can have up to three LEDs (FB to FB3), and the sub display has one LED (FB4) (see Figure 8). The CTRL and CTRL digital input control pins control the shutdown operation and the brightness of the main and sub displays (see Table 4). Table 4. Shutdown Truth Table CTRL CTRL LED Shutdown Operation 0 0 Sub display off/main display off 0 Sub display off/main display on 0 Sub display on/main display off Sub display on/main display on An external resistor, RSET, is connected between the ISET pin and. This resistor sets up a reference current, ISET, which is internally gained up by 0 within the to produce ILED currents of up to 0 ma/led (ILED = ISET 0 and ISET =.8 V/RSET). The uses four separate current sinks to sense each LED current individually with a typical matching performance of 0.3%. This current matching performance ensures uniform brightness across a color display. The lets the user control the brightness of the white LEDs with a digital PWM signal applied to CTRL and/or CTRL. The duty cycle of the applied PWM signal determines the brightness of the main and/or sub display backlight white LEDs. The also allows the brightness of the white LEDs to be controlled using a dc voltage (see Figure 7). Soft start circuitry limits the in-rush current flow at power-up. The is fabricated using CMOS technology for minimal power consumption and is packaged in a 6-lead lead frame chip scale package. V BRIGHT 0V.5V R = 5kΩ R SET = 3.4kΩ Figure 7. PWM Brightness Control Using a DC Voltage Applied to VBRIGHT C µf C µf C4 4.7µF CHARGE PUMP /.5 / MODE C3.µF MAIN SUB CTRL CTRL CONTROL LOGIC V REF OSC FB FB FB3 FB4 R SET LED CONTROL CIRCUIT CONTROL CONTROL CONTROL 3 CONTROL 4 CONTROLLED SINKS Figure 8. Functional Block Diagram Rev. D Page 9 of 6
10 AUTOMATIC GAIN CONTROL The automatic gain control block controls the operation of the charge pump by selecting the appropriate gain for the charge pump. Doing so maintains sufficient drive for the LED anodes at the highest power efficiency over a.6 V to 5.5 V input supply range. The charge pump switching thresholds are described in Table 5. Table 5. Charge Pump Switching Thresholds Gain Threshold (V).5 to 3.33 to to to 4.8 BRIGHTNESS CONTROL WITH A DIGITAL PWM SIGNAL PWM brightness control provides the widest brightness control method by pulsing the white LEDs on and off using one or both digital input control pins, CTRL and CTRL. PWM brightness control also removes any chromaticity shifts associated with changing the white LED current, because the LEDs operate at either zero current or full current (set by RSET). The digital PWM signal applied with a frequency of 00 Hz to 00 khz turns the current control sinks on and off using CTRL and/or CTRL. The average current through the LEDs changes with the PWM signal duty cycle. If the PWM frequency is much less than 00 Hz, flicker may be seen in the LEDs. For the, zero duty cycle turns off the LEDs, and a 50% duty cycle results in an average LED current, ILED, that is half the programmed LED current. For example, if RSET is set to program 0 ma/led, a 50% duty cycle results in an average ILED of 0 ma/led, which is half the programmed LED current. Data Sheet Applying a digital PWM signal to one or both digital input control pins, CTRL and CTRL, adjusts the brightness of the sub and/or main displays. The s four white LEDs are organized into two groups, main display (FB to FB3) and sub display (FB4); refer to the Theory of Operation section. The brightness of the s main and sub displays can be controlled together or separately. This is achieved by applying a digital PWM signal to both the CTRL and CTRL pins. The duty cycle of the applied digital PWM signal determines the brightness of the main and sub displays together. Varying the duty cycle of the applied PWM signal varies the brightness of the main and sub displays from 0% to 00%. By holding CTRL low and applying a digital PWM signal to CTRL, the sub display is turned off and the main display is turned on. Then the brightness of the main display is determined by the duty cycle of the applied digital PWM signal. By applying a digital PWM signal to CTRL and holding CTRL low, the sub display is turned on and the main display is turned off. Then the brightness of the sub display is determined by the duty cycle of the applied digital PWM signal. By applying a digital PWM signal to CTRL and holding CTRL high, the sub display is turned on and the main display is turned on. Then the brightness of the sub display is determined by the duty cycle of the applied digital PWM signal. The brightness of the main display is set to the maximum (maximum is set by RSET). By holding CTRL high and applying a digital PWM signal to CTRL, the sub and main displays are turned on. Then the brightness of the main display is determined by the duty cycle of the applied digital PWM signal. The brightness of the sub display is set to the maximum (maximum is set by RSET). 3.4V I IN PWM INPUT OR HIGH/LOW PWM INPUT OR HIGH/LOW R SET CTRL CTRL C µf C µf ADM8845 FB FB FB3 FB4 C3.µF Figure 9. Digital PWM Brightness Control Application Diagram When CTRL and CTRL are low, the LED current control sinks shutdown. Shutdown of the charge pump is delayed by 5 ms. This timeout period, tcp, allows the to determine if a digital PWM signal is present on CTRL and CTRL, or if the user has selected a full chip shutdown (see Figure 0). If digital PWM brightness control of the LEDs is not required, a constant Logic Level (VCC) or Logic Level 0 () must be applied. The four white LED in the are arranged into two groups, sub and main. It is possible to configure the four LEDs as in Table 6. Refer also to Figure 0. Rev. D Page 0 of 6
11 Data Sheet Table 6. Digital Inputs Truth Table CTRL CTRL LED Operation 0 0 Sub display off/main display off (full shutdown), 0 Sub display off/main display on, 3 0 Sub display on/main display off, Sub display on/main display on (full on), 3 0 PWM Sub display off/digital PWM brightness control on main display 4, 5 PWM 0 Digital PWM brightness control on sub display/main display off, 4 PWM Sub display on/digital PWM brightness control on main display, 5 PWM Digital PWM brightness control on sub display/main display on 5 PWM PWM Digital PWM brightness control on sub and main display 5 Sub display on means the display is on with the maximum brightness set by the RSET resistor. CTRL = means a constant logic level (VCC) is applied to CTRL. Main display off means only the main display is off. CTRL = 0 means a constant logic level () is applied to CTRL. 3 Main display on means the display is on with the maximum brightness set by the RSET resistor. CTRL = means a constant logic level (VCC) is applied to CTRL. 4 Sub display off means only the sub display LEDs is off. CTRL = 0 means a constant logic level () is applied to CTRL. 5 PWM means a digital PWM signal is applied to the CTRL and/or the CTRL pin with a frequency from 00 Hz to 00 khz. LED CONFIG. FULL ON SUB AND MAIN 50% DUTY CYCLE MAIN AND SUB OFF MAIN 80% DUTY CYCLE, SUB OFF t CP CTRL CTRL I LED (SUB) I LED (MAIN) 00% SUB DISPLAY BRIGHTNESS 50% 00% SHDN MAIN DISPLAY BRIGHTNESS 50% 80% SHDN 37ms > t CP > 5ms Figure 0. Application Timing Rev. D Page of 6
12 LED BRIGHTNESS CONTROL USING A PWM SIGNAL APPLIED TO V PWM Adding two external resistors and a capacitor, as shown in Figure, can also be used for PWM brightness control. This PWM brightness control method can be used instead of CTRL and/or CTRL digital PWM brightness control. With this configuration, CTRL and CTRL digital logic pins can control shutdown of the white LEDs, and VPWM can control the brightness of all the white LEDs. This is done by applying a high frequency PWM signal (amplitude 0 V to.5 V) to drive an R-C-R filter on the ISET pin of the. A 0% PWM duty cycle corresponds to 0 ma/led, and a 00% PWM duty cycle corresponds to a 0 ma/led. At PWM frequencies above 5 khz, C5 may be reduced (see Figure ). The amplitude of the PWM signal must only be 0 V and.5 V to result in 0 ma flowing in each LED. I LED I _ Voltage ( Duty Cycle) SET = 0 RSET R 00 R + R SET 00% = I LED = 0mA 0% = I LED = 0mA Data Sheet LED BRIGHTNESS CONTROL USING A DC VOLTAGE APPLIED TO V BRIGHT By adding one resistor, as shown in Figure 7, this configuration can also be used for brightness control of the white LEDs by using a dc voltage applied to the VBRIGHT node. Figure shows an application example of LED brightness control using a dc voltage with an amplitude of 0 V to.5 V applied to VBRIGHT. The equation for ILED is ISET = [(/RSET + /R)(VSET)] [(/R)(VBRIGHT)] ILED = 0 ISET where: R = 5 kω VSET = voltage at ISET pin (.8 V) V BRIGHT I LED.5V 0mA.6V 7.mA 0.8V 3.6mA 0V 0mA Figure. PWM Brightness Control Application Diagram Using a DC Voltage Applied to VBRIGHT V PWM 0V.5V R = 7.5kΩ R = 7.5kΩ C5 = µf R SET = 3.4kΩ Figure. PWM Brightness Control Using Filter-PWM Signal Rev. D Page of 6
13 Data Sheet APPLICATIONS LAYOUT CONSIDERATIONS AND NOISE Because of the s switching behavior, PCB trace layout is an important consideration. To ensure optimum performance, a ground plane should be used, and all capacitors (C, C, C3, C4) must be located with minimal track lengths to the pins of the. WHITE LED SHORTING If an LED is shorted, the continues to drive the remaining LEDs with ILED per LED (ILED = ISET 0 ma). This is because the uses four internal current sinks to produce the LED current. If an LED is shorted, the continues to sink (ISET 0 ma). DRIVING FOUR LEDS IN THE MAIN DISPLAY ONLY The can be operated with four LEDs in the main display only (see Figure 3). With this configuration, CTRL and CTRL are used together to control the main display shutdown operation and brightness control. DRIVING FEWER THAN FOUR LEDS The can be operated with fewer than four LEDs in parallel by simply leaving the unused FBx pins floating or by connecting them to. For example, Figure 4 shows three LEDs being powered by the. LCD MAIN DISPLAY.6V 5.5V.6V 5.5V CTRL CTRL FB FB FB3 FB4 CTRL CTRL FB FB FB3 FB4 R SET R SET Figure 3. Driving Four White LEDs Figure 4. Driving Three White LEDs MAIN DISPLAY SUB DISPLAY.6V 5.5V CTRL CTRL FB FB FB3 FB4 R SET Figure 5. Typical Application Diagram Rev. D Page 3 of 6
14 Data Sheet USING SMALLER CAPACITOR VALUES The can be operated with the smaller capacitor values described here to reduce capacitor footprint sizes. Option Input and output ripple plots for and.5 modes of operation are shown with C, C = 0. μf; C3 = 0.47 μf; and C4 = μf. Option Input and output ripple plots for and.5 modes of operation are shown with C, C = 0. μf; C3 = 0.47 μf; and C4 = 4.7 μf. 3 3 CH3 0.0mV B W CH 0.0mV B W M 400ns CH3 33mV CH3 0.0mV CH 0.0mV B W B W M.00 s CH3 33mV Figure 6. Mode Operation, Four LEDs with 0 ma/led at VCC = 5.0 V, with a μf VCC Decoupling Capacitor Figure 8. Mode Operation, Four LEDs with 0 ma/led at VCC = 5.0 V, with a 4.7 μf VCC Decoupling Capacitor 3 3 CH 0.0mV B W M 400ns CH3 33mV CH3 50.0mV B W Figure 7..5 Mode Operation, Four LEDs with 0 ma/led at VCC = 3.6 V, with a μf VCC Decoupling Capacitor CH3 50.0mV CH 0.0mV B W B W M 400ns CH3 33mV Figure 9..5 Mode Operation, Four LEDs with 0 ma/led at VCC = 3.6 V, with a 4.7 μf VCC Decoupling Capacitor Rev. D Page 4 of 6
15 Data Sheet POWER EFFICIENCY The power efficiency (η) equations are as follows: where: η = POUT/PIN PIN = ((VCC ILOAD Gain) + (IQ VCC)) POUT = 4 (VF ILED) IQ is the quiescent current of the,.6 ma. VF is the LED forward voltage. Gain is the charge pump mode (,.5, ). Example The driving four white LED with 0 ma/led at VCC = 3.4 V (.5 mode), LED VF = 4.5 V. PIN = ((VCC ILOAD Gain) + (VCC IQ)) PIN = (( ma.5) + (3.4.6 ma)) PIN = ((0.408) + ( )) PIN = POUT = 4(VF ILED) POUT = 4(4.5 V 0 ma) POUT = 0.36 Example The driving four white LED with 0 ma/led at VCC = 3.4 (.5 mode), LED VF = 3.6 V. PIN = ((VCC ILOAD Gain) + (VCC IQ)) PIN = (( ma.5) + (3.4.6 ma)) PIN = ((0.408) + ( )) PIN = POUT = 4(VF ILED) POUT = 4(3.6 V 0 ma) POUT = 0.88 η = POUT/PIN η = 0.88/ η = 70 % η = POUT/PIN η = 0.36/ η = 87 % = 3.4V I IN I LOAD R SET 7.3kΩ CTRL CTRL FB FB FB3 FB4 Figure 30. Charge Pump Power Efficiency Diagram, Example Rev. D Page 5 of 6
16 Data Sheet OUTLINE DIMENSIONS PIN INDICATOR SQ BSC DETAIL A (JEDEC 95) PIN INDICATOR AREA OPTIONS (SEE DETAIL A) EXPOSED PAD SQ PKG SEATING PLANE TOP VIEW TOP VIEW MAX 0.0 NOM COPLANARITY REF 8 5 BOTTOM VIEW COMPLIANT TOJEDEC STANDARDS MO-0-WEED-6. Figure 3. 6-Lead Lead Frame Chip Scale Package [LFCSP] 3 mm 3 mm Body and 0.75 mm Package Height (CP-6-) Dimensions shown in millimeters 0.0 MIN FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET E ORDERING GUIDE Model Temperature Range Package Description Package Option Branding ACPZ-REEL7 40 C to +85 C 6-Lead Lead Frame Chip Scale Package [LFCSP] CP-6- MU EB-EVALZ Evaluation Board Z = RoHS Compliant Part Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D /7(D) Rev. D Page 6 of 6
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1 MHz to 4 MHz RF/IF Digitally Controlled VGA ADL524 FEATURES Operating frequency from 1 MHz to 4 MHz Digitally controlled VGA with serial and parallel interfaces 6-bit,.5 db digital step attenuator 31.5
ADM6823. Low Voltage, Supervisory Circuit with Watchdog and Manual Reset in 5-Lead SOT-23. Data Sheet FUNCTIONAL BLOCK DIAGRAM FEATURES APPLICATIONS
Data Sheet Low Voltage, Supervisory Circuit with Watchdog and Manual Reset in 5-Lead SOT-23 FEATURES Precision low voltage monitoring 9 reset threshold options: 1.58 V to 4.63 V (typical) 140 ms (minimum)
1 MHz to 10 GHz, 45 db Log Detector/Controller AD8319
FEATURES Wide bandwidth: 1 MHz to 10 GHz High accuracy: ±1.0 db over temperature 45 db dynamic range up to 8 GHz Stability over temperature: ±0.5 db Low noise measurement/controller output VOUT Pulse response
High Isolation, Silicon SP4T, Nonreflective Switch, 9 khz to 12.0 GHz ADRF5040
RF4 RF3 7 8 9 1 11 12 21 2 19 RF2 High Isolation, Silicon SP4T, Nonreflective Switch, 9 khz to 12. GHz ADRF54 FEATURES FUNCTIONAL BLOCK DIAGRAM Nonreflective 5 Ω design Positive control range: V to 3.3
1.5 Ω On Resistance, ±15 V/12 V/±5 V, icmos, Dual SPDT Switch ADG1436
Data Sheet.5 Ω On Resistance, ±5 V/2 V/±5 V, icmos, Dual SPDT Switch ADG436 FEATURES.5 Ω on resistance.3 Ω on-resistance flatness. Ω on-resistance match between channels Continuous current per channel
30 MHz to 6 GHz RF/IF Gain Block ADL5611
Data Sheet FEATURES Fixed gain of 22.2 db Broad operation from 3 MHz to 6 GHz High dynamic range gain block Input and output internally matched to Ω Integrated bias circuit OIP3 of 4. dbm at 9 MHz P1dB
RT9363A. 3 Channels 90mA x1/x2 Charge Pump White LED Driver. General Description. Features. Applications
Channels 90mA x/x Charge Pump White LED Driver General Description The is a compact, high efficient and highly integrated charge pump white LED driver. It maintains the highest efficiency by utilizing
12.17 GHz to GHz MMIC VCO with Half Frequency Output HMC1167
9 0 3 4 5 6 9 7 6.7 GHz to 3.33 GHz MMIC VCO with Half Frequency Output FEATURES Dual output frequency range fout =.7 GHz to 3.330 GHz fout/ = 6.085 GHz to 6.665 GHz Output power (POUT): 0.5 dbm Single-sideband
11.41 GHz to GHz MMIC VCO with Half Frequency Output HMC1166
9 6 3 30 29 VTUNE 28 27 26.4 GHz to 2.62 GHz MMIC VCO with Half Frequency Output FEATURES Dual output frequency range fout =.4 GHz to 2.62 GHz fout/2 = 5.705 GHz to 6.3 GHz Output power (POUT): dbm Single-sideband
0.4 Ω CMOS, Dual DPDT Switch in WLCSP/LFCSP/TSSOP ADG888
FEATURES.8 V to 5.5 V operation Ultralow on resistance.4 Ω typical.6 Ω maximum at 5 V supply Excellent audio performance, ultralow distortion.7 Ω typical.4 Ω maximum RON flatness High current carrying
12.92 GHz to GHz MMIC VCO with Half Frequency Output HMC1169
Data Sheet 12.92 GHz to 14.07 GHz MMIC VCO with Half Frequency Output FEATURES Dual output frequency range fout = 12.92 GHz to 14.07 GHz fout/2 = 6.46 GHz to 7.035 GHz Output power (POUT): 11.5 dbm SSB
Ultralow Power, Adaptive Linear Power, Dual-Port ADSL/ADSL2+ Line Driver ADLD8403
Data Sheet Ultralow Power, Adaptive Linear Power, Dual-Port ADSL/ADSL2+ Line Driver FEATURES 2 differential DSL channels comprising current feedback, high output current amplifiers with integrated feedback
30 MHz to 6 GHz RF/IF Gain Block ADL5611
Preliminary Technical Data FEATURES Fixed gain of 22.1 db Broad operation from 30 MHz to 6 GHz High dynamic range gain block Input/output internally matched to 50 Ω Integrated bias control circuit OIP3
Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23 ADM823/ADM824/ADM825
Data Sheet Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23 ADM823/ADM824/ADM825 FEATURES FUNCTIONAL BLOCK DIAGRAM Precision 2.5 V to 5 V power supply monitor 7 reset threshold
SGM mA Buck/Boost Charge Pump LED Driver
GENERAL DESCRIPTION The SGM3140 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for Flash
Low Power, Rail-to-Rail Output, Precision JFET Amplifiers AD8641/AD8642/AD8643
Data Sheet Low Power, Rail-to-Rail Output, Precision JFET Amplifiers AD864/AD8642/AD8643 FEATURES Low supply current: 25 μa max Very low input bias current: pa max Low offset voltage: 75 μv max Single-supply
4 GHz to 18 GHz Divide-by-8 Prescaler ADF5002
4 GHz to 18 GHz Divide-by-8 Prescaler ADF5002 FEATURES Divide-by-8 prescaler High frequency operation: 4 GHz to 18 GHz Integrated RF decoupling capacitors Low power consumption Active mode: 30 ma Power-down
Dual, Bootstrapped, 12 V MOSFET Driver with Output Disable ADP3650
FEATURES All-in-one synchronous buck driver Bootstrapped high-side drive One PWM signal generates both drives Anti-crossconduction protection circuitry OD for disabling the driver outputs APPLICATIONS
High-Speed, 5 V, 0.1 F CMOS RS-232 Drivers/Receivers ADM222/ADM232A/ADM242
a FEATURES 200 kb/s Transmission Rate Small (0. F) Charge Pump Capacitors Single V Power Supply Meets All EIA-232-E and V.2 Specifications Two Drivers and Two Receivers On-Board DC-DC Converters V Output
Comparators and Reference Circuits ADCMP350/ADCMP354/ADCMP356
Data Sheet Comparators and Reference Circuits ADCMP35/ADCMP354/ADCMP356 FEATURES Comparators with.6 V on-chip references Output stages Open-drain active low (ADCMP35) Open-drain active high (ADCMP354)
GaAs, phemt, MMIC, Low Noise Amplifier, 0.3 GHz to 20 GHz HMC1049LP5E
ACG ACG ACG FEATURES Low noise figure:. db PdB output power:. dbm PSAT output power: 7. dbm High gain: db Output IP: 9 dbm Supply voltage: VDD = 7 V at 7 ma Ω matched input/output (I/O) -lead, mm mm LFCSP
9- and 11-Channel, Muxed Input LCD Reference Buffers AD8509/AD8511
9- and -Channel, Muxed Input LCD Reference Buffers AD8509/AD85 FEATURES Single-supply operation: 3.3 V to 6.5 V High output current: 300 ma Low supply current: 6 ma Stable with 000 pf loads Pin compatible
MAX8848Y/MAX8848Z High-Performance Negative Charge Pump for 7 White LEDs in 3mm x 3mm Thin QFN
EVALUATION KIT AVAILABLE MAX8848Y/MAX8848Z General Description The MAX8848Y/MAX8848Z negative charge pumps drive up to 7 white LEDs with regulated constant current for display backlight applications. By
RT Channel Charge Pump White LED Driver with Low Dropout Current Source. Preliminary. Features. General Description. Ordering Information
4-Channel Charge Pump White LED Driver with Low Dropout Current Source General Description The is a high efficiency and cost effective charge pump white LED driver. It supports up to 4 white LEDs with
ADG1411/ADG1412/ADG1413
.5 Ω On Resistance, ±5 V/+2 V/±5 V, icmos, Quad SPST Switches ADG4/ADG42/ADG43 FEATURES.5 Ω on resistance.3 Ω on-resistance flatness. Ω on-resistance match between channels Continuous current per channel
Rail-to-Rail, High Output Current Amplifier AD8397
Rail-to-Rail, High Output Current Amplifier FEATURES Dual operational amplifier Voltage feedback Wide supply range from 3 V to 24 V Rail-to-rail output Output swing to within.5 V of supply rails High linear
SGM mA Buck/Boost Charge Pump LED Driver
GENERAL DESCRIPTION The SGM3140 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH
DC to 1000 MHz IF Gain Block ADL5530
DC to MHz IF Gain Block ADL3 FEATURES Fixed gain of 6. db Operation up to MHz 37 dbm Output Third-Order Intercept (OIP3) 3 db noise figure Input/output internally matched to Ω Stable temperature and power
10 W, Failsafe, GaAs, SPDT Switch 0.2 GHz to 2.7 GHz HMC546LP2E
FEATURES High input P.dB: 4 dbm Tx Low insertion loss:.4 db High input IP3: 67 dbm Positive control: V low control; 3 V to 8 V high control Failsafe operation: Tx is on when no dc power is applied APPLICATIONS
Zero Drift, Digitally Programmable Instrumentation Amplifier AD8231-EP OP FUNCTIONAL BLOCK DIAGRAM FEATURES ENHANCED PRODUCT FEATURES
Zero Drift, Digitally Programmable Instrumentation Amplifier AD8231-EP FEATURES Digitally/pin-programmable gain G = 1, 2, 4, 8, 16, 32, 64, or 128 Specified from 55 C to +125 C 5 nv/ C maximum input offset
LDS8710. High Efficiency 10 LED Driver With No External Schottky FEATURES APPLICATION DESCRIPTION TYPICAL APPLICATION CIRCUIT
High Efficiency 10 LED Driver With No External Schottky FEATURES High efficiency boost converter with the input voltage range from 2.7 to 5.5 V No external Schottky Required (Internal synchronous rectifier*)
Ultralow Power Supervisory ICs with Watchdog Timer and Manual Reset ADM8611/ADM8612/ADM8613/ADM8614/ADM8615
Ultralow Power Supervisory ICs with Watchdog Timer and Manual Reset FEATURES Ultralow power consumption with ICC = 92 na (typical) Continuous monitoring with no blank time Pretrimmed voltage monitoring
Single 0.275% Comparator and Reference with Dual Polarity Outputs ADCMP361
Data Sheet FEATURES mv ±.275% threshold Supply range:.7 V to 5.5 V Low quiescent current: 6.5 µa typical Input range includes ground Internal hysteresis: 9.3 mv typical Low input bias current: ±5 na maximum
1 Ω Typical On Resistance, ±5 V, +12 V, +5 V, and +3.3 V Dual SPDT Switches ADG1636
FEATURES Ω typical on resistance.2 Ω on resistance flatness ±3.3 V to ±8 V dual supply operation 3.3 V to 6 V single supply operation No VL supply required 3 V logic-compatible inputs Rail-to-rail operation
High Voltage CMOS Boost White LED Driver
High Voltage CMOS Boost White LED Driver FEATURES Drives 6 to 8 White LEDs in series from 3V Up to 87% Efficiency Low Quiescent Ground Current 0.6mA Adjustable Output Current (up to 40mA) High Frequency
ADA485-/ADA485- TABLE OF CONTENTS Features... Applications... Pin Configurations... General Description... Revision History... Specifications... 3 Spe
NC NC NC NC 5 6 7 8 6 NC 4 PD 3 PD FEATURES Ultralow power-down current: 5 na/amplifier maximum Low quiescent current:.4 ma/amplifier High speed 75 MHz, 3 db bandwidth V/μs slew rate 85 ns settling time
30 MHz to 6 GHz RF/IF Gain Block ADL5544
Data Sheet FEATURES Fixed gain of 17.4 db Broadband operation from 3 MHz to 6 GHz Input/output internally matched to Ω Integrated bias control circuit OIP3 of 34.9 dbm at 9 MHz P1dB of 17.6 dbm at 9 MHz
700 MHz to 4200 MHz, Tx DGA ADL5335
FEATURES Differential input to single-ended output conversion Broad input frequency range: 7 MHz to 42 MHz Maximum gain: 12. db typical Gain range of 2 db typical Gain step size:.5 db typical Glitch free,
Low Voltage, 400 MHz, Quad 2:1 Mux with 3 ns Switching Time ADG774A
Data Sheet FEATURES Bandwidth: >4 MHz Low insertion loss and on resistance: 2.2 Ω typical On resistance flatness:.3 Ω typical Single 3 V/5 V supply operation Very low distortion:
AD864/AD8642/AD8643 TABLE OF CONTENTS Specifications... 3 Electrical Characteristics... 3 Absolute Maximum Ratings... 5 ESD Caution... 5 Typical Perfo
FEATURES Low supply current: 25 µa max Very low input bias current: pa max Low offset voltage: 75 µv max Single-supply operation: 5 V to 26 V Dual-supply operation: ±2.5 V to ±3 V Rail-to-rail output Unity-gain
SGM3122 White LED Charge Pump Current Source with PWM Brightness Control
GENERAL DESCRIPTION The SGM3122 is a charge pump with PWM brightness control for white LED supplies in LCD display backlight applications. The supply voltage ranges from 2.7V to 5.5V, it is ideally suited
High Accuracy Ultralow I Q, 300 ma, anycap Low Dropout Regulator ADP3333
High Accuracy Ultralow I Q, 3 ma, anycap Low Dropout Regulator ADP3333 FEATURES FUNCTIONAL BLOCK DIAGRAM High accuracy over line and load: ±.8% @ 5 C, ±.8% over temperature Ultralow dropout voltage: 3
MP5410 Low Start-up Voltage Boost Converter with Four SPDT Switches
The Future of Analog IC Technology DESCRIPTION The MP5410 is a high efficiency, current mode step-up converter with four single-pole/doublethrow (SPDT) switches designed for low-power bias supply application.
Programmable Low Voltage 1:10 LVDS Clock Driver ADN4670
Data Sheet Programmable Low Voltage 1:10 LVDS Clock Driver FEATURES FUNCTIONAL BLOCK DIAGRAM Low output skew
Low Power, Adjustable UV and OV Monitor with 400 mv, ±0.275% Reference ADCMP671
Data Sheet Low Power, Adjustable UV and Monitor with mv, ±.7% Reference ADCMP67 FEATURES Window monitoring with minimum processor I/O Individually monitoring N rails with only N + processor I/O mv, ±.7%
CMOS Switched-Capacitor Voltage Converters ADM660/ADM8660
CMOS Switched-Capacitor Voltage Converters ADM66/ADM866 FEATURES ADM66: Inverts or Doubles Input Supply Voltage ADM866: Inverts Input Supply Voltage ma Output Current Shutdown Function (ADM866) 2.2 F or
High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs
19-2731; Rev 1; 10/03 EVALUATION KIT AVAILABLE High-Efficiency, 26V Step-Up Converters General Description The step-up converters drive up to six white LEDs with a constant current to provide backlight
Preliminary. Four Channel Constant Current LED Driver
Preliminary Four Channel Constant Current LED Driver FEATURES Cost Effective LED driver Constant current output ideal for Driving LED strings Four Channel LED Driver provides matched LED current Current
1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
19-3461; Rev ; 11/4 EVALUATION KIT AVAILABLE 1.2A White LED Regulating Charge Pump for General Description The charge pumps drive white LEDs, including camera strobes, with regulated current up to 1.2A
High-Efficiency, 40V White LED Driver with Dimming Control
High-Efficiency, 40V White LED Driver with Dimming Control Description The is a step-up DC/DC converter specifically designed for driving WLEDs with a constant current. The can drive up 10 white LEDs in
High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs MAX1553/MAX1554
EVALUATION KIT AVAILABLE /MAX1554 General Description The /MAX1554 drive white LEDs in series with a constant current to provide efficient display backlighting in cellular phones, PDAs, and other hand-held
Dual, 3 V, CMOS, LVDS High Speed Differential Driver ADN4663
Dual, 3 V, CMOS, LVDS High Speed Differential Driver ADN4663 FEATURES ±15 kv ESD protection on output pins 600 Mbps (300 MHz) switching rates Flow-through pinout simplifies PCB layout 300 ps typical differential
1.0 V Precision Low Noise Shunt Voltage Reference ADR510
1.0 V Precision Low Noise Shunt Voltage Reference FEATURES Precision 1.000 V voltage reference Ultracompact 3 mm 3 mm SOT-23 package No external capacitor required Low output noise: 4 μv p-p (0.1 Hz to
SGM3736 PWM Dimming, 38V Step-Up LED Driver
GENERAL DESCRIPTION The SGM3736 is a versatile constant current LED driver with a high efficiency step-up converter architecture. The low-side power MOSFET is integrated in the device, significantly shrinking
ADG918/ADG919. Wideband 4 GHz, 43 db Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT Switches
Wideband 4 GHz, 43 db Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT Switches ADG918/ FEATURES Wideband switch: 3 db @ 4 GHz Absorptive/reflective switches High off isolation (43 db @ 1 GHz) Low
1.2 V Precision Low Noise Shunt Voltage Reference ADR512
FEATURES Precision 1.200 V Voltage Reference Ultracompact 3 mm 3 mm SOT-23 Package No External Capacitor Required Low Output Noise: 4 µv p-p (0.1 Hz to 10 Hz) Initial Accuracy: ±0.3% Max Temperature Coefficient:
Built-In OVP White LED Step-up Converter in Tiny Package
Built-In White LED Step-up Converter in Tiny Package Description The is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive up to 4 LEDs in
2.3 GHz to 2.4 GHz WiMAX Power Amplifier ADL5570
2.3 GHz to 2. GHz WiMAX Power Amplifier ADL5570 FEATURES Fixed gain of 29 db Operation from 2.3 GHz to 2. GHz EVM 3% at POUT = 25 dbm with 6 QAM OFDMA Input internally matched to 50 Ω Power supply: 3.2
RT V DC-DC Boost Converter. Features. General Description. Applications. Ordering Information. Marking Information
RT8580 36V DC-DC Boost Converter General Description The RT8580 is a high performance, low noise, DC-DC Boost Converter with an integrated 0.5A, 1Ω internal switch. The RT8580's input voltage ranges from
SN Channels Constant Current LED Driver with PWM Brightness Control. Description. Features. Application. Typical application C IN.
4 Channels Constant Current LED Driver with PWM Brightness Control Description The SN3214 provides four regulated current sources, delivers up to 20mA of load current to accommodate four White LEDs. It
TFT-LCD DC/DC Converter with Integrated Backlight LED Driver
TFT-LCD DC/DC Converter with Integrated Backlight LED Driver Description The is a step-up current mode PWM DC/DC converter (Ch-1) built in an internal 1.6A, 0.25Ω power N-channel MOSFET and integrated
Single, 3 V, CMOS, LVDS Differential Line Receiver ADN4662
Data Sheet FEATURES ±15 kv ESD protection on input pins 400 Mbps (200 MHz) switching rates Flow-through pinout simplifies PCB layout 2.5 ns maximum propagation delay 3.3 V power supply High impedance outputs
Features. = +25 C, Vs = +5V, Vpd = +5V, Vbias=+5V
v4.1217 HMC49LP4E Typical Applications This amplifier is ideal for use as a power amplifier for 3.3-3.8 GHz applications: WiMAX 82.16 Fixed Wireless Access Wireless Local Loop Functional Diagram Features
ADG1606/ADG Ω RON, 16-Channel, Differential 8-Channel, ±5 V,+12 V,+5 V, and +3.3 V Multiplexers FEATURES FUNCTIONAL BLOCK DIAGRAMS
4.5 Ω RON, 6-Channel, Differential 8-Channel, ±5 V,+2 V,+5 V, and +3.3 V Multiplexers ADG66/ADG67 FEATURES 4.5 Ω typical on resistance. Ω on resistance flatness ±3.3 V to ±8 V dual supply operation 3.3
FET Drive Simple Sequencers ADM6819/ADM6820
FET Drive Simple Sequencers ADM6819/ADM682 FEATURES Single chip enables power supply sequencing of two supplies On-board charge pump fully enhances N-channel FET Adjustable primary supply monitor to.618
RT8511B 43V Asynchronous Boost WLED Driver General Description Features Wide Input Voltage Range : 2.7V to 24V High Output Voltage : up to 43V
RT85B 43V Asynchronous Boost WLED Driver General Description The RT85B is an LED driver IC that can support up to 0 WLED in series. It is composed of a current mode boost converter integrated with a 43V/.A
Low Voltage, 400 MHz, Quad 2:1 Mux with 3 ns Switching Time ADG774A
Low Voltage, 4 MHz, Quad 2:1 Mux with 3 ns Switching Time FEATURES Bandwidth: >4 MHz Low insertion loss and on resistance: 2.2 Ω typical On resistance flatness:.3 Ω typical Single 3 V/5 V supply operation
Low Cost Microprocessor Supervisory Circuits ADM705/ADM706/ADM707/ADM708
Low Cost Microprocessor Supervisory Circuits ADM705/ADM706/ADM707/ADM708 FEATURES Guaranteed valid with VCC = V 90 μa quiescent current Precision supply voltage monitor 4.65 V (ADM705/ADM707) 4.40 V (ADM706/ADM708)
MAX8847Y/MAX8847Z High-Performance Negative Charge Pump for 6 White LEDs in 3mm x 3mm Thin QFN
EVALUATION KIT AVAILABLE MAX8847Y/MAX8847Z General Description The MAX8847Y/MAX8847Z negative charge pumps drive up to 6 white LEDs with regulated constant current for display backlight applications. By
Very Low Distortion, Precision Difference Amplifier AD8274
Very Low Distortion, Precision Difference Amplifier AD8274 FEATURES Very low distortion.2% THD + N (2 khz).% THD + N ( khz) Drives Ω loads Excellent gain accuracy.3% maximum gain error 2 ppm/ C maximum
9.25 GHz to GHz MMIC VCO with Half Frequency Output HMC1162
9.5 GHz to 10.10 GHz MMIC VCO with Half Frequency Output HMC116 FEATURES FUTIONAL BLOCK DIAGRAM Dual output f OUT = 9.5 GHz to 10.10 GHz f OUT / = 4.65 GHz to 5.050 GHz Power output (P OUT ): 11 dbm (typical)
MP V, 700kHz Synchronous Step-Up White LED Driver
The Future of Analog IC Technology MP3306 30V, 700kHz Synchronous Step-Up White LED Driver DESCRIPTION The MP3306 is a step-up converter designed for driving white LEDs from 3V to 12V power supply. The
High Temperature, Low Drift, Micropower 2.5 V Reference ADR225
Data Sheet FEATURES Extreme high temperature operation 4 C to + C, 8-lead FLATPACK 4 C to +75 C, 8-lead SOIC Temperature coefficient 4 ppm/ C, 8-lead FLATPACK ppm/ C, 8-lead SOIC High output current: ma