High-Output-Drive, Precision, Low-Power, Single- Supply, Rail-to-Rail I/O Op Amps with Shutdown

Transcription

1 9-4; Rev 3; /7 High-Output-Drive, Precision, Low-Power, Single- General Description The MAX465 MAX469 family of operational amplifiers combines excellent DC accuracy with high output current drive, single-supply operation, and rail-to-rail inputs and outputs. These devices operate from a single +.7V to +6.5V supply, or from dual ±.35V to ±3.5V supplies. They typically draw.ma supply current, and are guaranteed to deliver 8mA output current. The MAX466/MAX468 have a shutdown mode that reduces supply current to 38µA per amplifier and places the outputs into a high-impedance state. The MAX465 MAX469 s precision performance combined with high output current, wide input/output dynamic range, single-supply operation, and low power consumption makes them ideal for portable audio applications and other low-voltage, battery-powered systems. The MAX465 is available in the space-saving 5-pin SOT3 package and the MAX466 is available in a tiny mm x mm x.8mm µdfn package. PART AMPS PER PACKAGE Selector Guide SHUTDOWN MODE MAX465 Single MAX466 Single Yes MAX467 Dual MAX468 Dual Yes MAX469 Quad Applications Portable/Battery-Powered Audio Applications Portable Headphone Speaker Drivers Laptop/Notebook Computers Sound Ports/Cards Set-Top Boxes Cell Phones Hands-Free Car Phones (kits) Signal Conditioning Digital-to-Analog Converter Buffers Transformer/Line Drivers Motor Drivers Typical Operating Circuit appears at end of data sheet. Features 8mA (min) Output Drive Capability Rail-to-Rail Input Common-Mode Voltage Range Rail-to-Rail Output Voltage Swing.mA Supply Current per Amplifier +.7V to +6.5V Single-Supply Operation 5MHz Gain-Bandwidth Product 5µV Offset Voltage db Voltage Gain (R L = kω) 88dB Power-Supply Rejection Ratio No Phase Reversal for Overdriven Inputs Unity-Gain Stable for Capacitive Loads to 5pF Low-Power Shutdown Mode: Reduces Supply Current to 38µA Places Outputs in High-Impedance State Available in 5-Pin SOT3 Package (MAX465) or mm x mm x.8mm µdfn (MAX466) TOP VIEW V EE IN+ 5 Ordering Information PART TEMP RANGE PIN- PACKAGE MAX466ELA+T -4 C to +85 C 8 µdfn-8 AAG +Denotes lead-free package. Ordering Information continued on last page. Pin Configurations MAX SOT3-5 Pin Configurations continued at end of data sheet. IN- TOP MARK MAX465EUK-T -4 C to +85 C 5 SOT3-5 AABY MAX466EPA -4 C to +85 C 8 Plastic DIP MAX466ESA -4 C to +85 C 8 SO MAX466EUA -4 C to +85 C 8 µmax MAX465 MAX469 Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 MAX465 MAX469 ABSOLUTE MAXIMUM RATINGS Supply Voltage ( to V EE )...7V IN_+, IN_-, SHDN_...(V EE -.3V) + ( +.3V) _ (shutdown mode)...(v EE -.3V) + ( +.3V) Output Short-Circuit Duration to or V EE (Note )...Continuous Continuous Power Dissipation (T A = +7 C) 5-Pin SOT3 (derate 7.mW/ C above +7 C)...57mW 8-Pin Plastic DIP (derate 9.9mW/ C above +7 C)...77mW 8-Pin SO (derate 5.88mW/ C above +7 C)...47mW 8-Pin µmax (derate 4.mW/ C above +7 C)...33mW Note : Continuous power dissipation should also be observed. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS 8-Pin µdfn (derate 4.8mW/ C above +7 C)...38mW -Pin µmax (derate 5.6mW/ C above +7 C)...444mW 4-Pin Plastic DIP (derate.mw/ C above +7 C) 8mW 4-Pin SO (derate 8.33mW/ C above +7 C)...667mW Operating Temperature Range...-4 C to +85 C Junction Temperature...+5 C Storage Temperature Range C to +5 C Lead Temperature (soldering, s)...+3 C ( = +.7V to +6.5V, V EE = V, V CM = V, V = ( / ), R L = kω to ( / ), V SHDN V, T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX46_EPA/EPD.5.85 MAX46_ESA/ESD.5.85 Input Offset Voltage V OS V CM = V EE to MAX46_EUA/EUB/ELA.35.7 mv MAX46_EUK.35.5 MAX469E_D.5. Input Bias Current I B V CM = V EE to ±5 ±5 na Input Offset Current I OS V CM = V EE to ± ±5 na 5 kω V IN + - V IN -.8V Differential Input Resistance R IN(DIFF) V IN + - V IN - >.8V Common-Mode Input Voltage Range V CM Inferred from CMRR test V EE V MAX46_EPA/EPD 7 93 MAX46_ESA/ESD 7 93 Common-Mode V CMRR EE -.5V < MAX46_EUA/EUB/ELA 6 89 Rejection Ratio V CM < ( +.5V) MAX46_EUK 63 9 db MAX469E_D 7 93 MAX46_EPA/EPD 7 88 MAX46_ESA/ESD 7 88 Power-Supply Rejection Ratio PSRR =.7V to 6.5V MAX46_EUA/EUB/ELA 7 86 db MAX46_EUK 7 86 MAX469E_D 7 88 Output Resistance R A VCL = +V/V. kω Off-Leakage Current in Shutdown I (SHDN) V SHDN <.8V, V = V to ±. ± μa Large-Signal Voltage Gain A VOL = 5V V =.V to 4.8V, R L = kω 95 V =.6V to 4.4V, R L = 5Ω 7 83 db

3 DC ELECTRICAL CHARACTERISTICS (continued) ( = +.7V to +6.5V, V EE = V, V CM = V, V = ( / ), R L = kω to ( / ), V SHDN V, T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Swing V = 5V Output Source/Sink Current (Note ) R L = kω R L = 5Ω - V OH 5 3 V OL - V EE 5 - V OH V OL - V EE 6 35 V =.6V to ( -.6V) ±8 ±5 ma SHDN Logic Threshold V IL Shutdown mode.8 (Note 3) V IH Normal mode. SHDN Input Bias Current V EE < V SHDN < ±3. µa Operating Supply-Voltage Range Inferred from PSRR test V Quiescent Supply Current = 5V.3.5 I (per Amplifier) CC = 3V..4 Shutdown Supply Current (per Amplifier) = 5V I CC(SHDN) V SHDN <.8V = 3V mv V ma µa MAX465 MAX469 DC ELECTRICAL CHARACTERISTICS ( = +.7V to +6.5V, V EE = V, V CM = V, V = ( / ), R L = kω to ( / ), V SHDN V, T A = -4 C to +85 C, unless otherwise noted.) (Note 4) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX46_EPA/EPD. MAX46_ESA/ESD. Input Offset Voltage V OS V CM = V EE to MAX46_EUA/EUB/ELA 4.9 MAX46_EUK 4.3 MAX469E_D. Offset-Voltage Tempco ΔV OS /ΔT ±3 µv/ C Input Bias Current I B V CM = V EE to ±5 na Input Offset Current I OS V CM = V EE to ± na Common-Mode Input Voltage Range Common-Mode Rejection Ratio V CM Inferred from CMRR test V EE V CMRR V EE -.5V < V CM < ( +.5V) MAX46_EPA/EPD 7 MAX46_ESA/ESD 7 MAX46_EUA/EUB/ELA 56 MAX46_EUK 57 MAX469E_D 69 MAX46_EPA/EPD 67 MAX46_ESA/ESD 67 Power-Supply Rejection Ratio PSRR =.7V to 6.5V MAX46_EUA/EUB/ELA 65 MAX46_EUK 65 MAX469E_D 66 mv db db 3

4 MAX465 MAX469 DC ELECTRICAL CHARACTERISTICS (continued) ( = +.7V to +6.5V, V EE = V, V CM = V, V = ( / ), R L = kω to ( / ), V SHDN V, T A = -4 C to +85 C, unless otherwise noted.) PARAMETER Off-Leakage Current in Shutdown Large-Signal Voltage Gain Output Voltage Swing Output Source/Sink Current (Note ) SHDN Logic Threshold (Note 3) SHDN Input Bias Current Operating Supply-Voltage Range Quiescent Supply Current (per Amplifier) Shutdown Supply Current (per Amplifier) SYMBOL I (SHDN) A VOL V I CC I CC(SHDN) Inferred from PSRR test = 5V = 3V V SHDN <.8V CONDITIONS V SHDN <.8V, V = V to = 5V = 5V V =.V to 4.8V, R L = kω V =.6V to 4.4V, R L = 5Ω - V OH R L = kω V OL - V EE - V OH R L = 5Ω V OL - V EE V =.6V to ( -.6V) = 5V = 3V MIN TYP MAX 9 66 ±8 ± V IL Shutdown mode.8 V IH Normal mode. V EE < V SHDN < ± UNITS µa db mv ma V µa V ma µa Note : Although the minimum output current is guaranteed to be ±8mA, exercise caution to ensure that the absolute maximum power-dissipation rating of the package is not exceeded. Note 3: SHDN logic thresholds are referenced to V EE. Note 4: The MAX465EUK is % tested at +5 C. All temperature limits are guaranteed by design. AC ELECTRICAL CHARACTERISTICS ( = +.7V to +6.5V, V EE = V, V CM = V, V = ( / ), R L =.5kΩ to ( / ), V SHDN V, C L = 5pF, T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Gain-Bandwidth Product GBWP 5 MHz Full-Power Bandwidth FPBW V = 4Vp-p, = 5V 6 khz Slew Rate SR V/µs Phase Margin PM 68 degrees Gain Margin GM db Total Harmonic Distortion THD f = khz, V = Vp-p, A VCL = +V/V.5 % Settling Time to.% t S A VCL = +V/V, V step. µs Input Capacitance C IN 3 pf Input Voltage-Noise Density e n f = khz 6 nv/ Hz Input Current-Noise Density i n f = khz.4 pa/ Hz Channel-to-Channel Isolation f = khz, R L = kω (MAX467 MAX469) 5 db Capacitive Load Stability A VCL = +V/V, no sustained oscillations 5 pf Shutdown Time t SHDN µs Enable Time from Shutdown t ENABLE µs Power-Up Time t ON 5 µs 4

5 Typical Operating Characteristics ( = +5.V, V EE = V, R L = kω, T A = +5 C, unless otherwise noted.) GAIN (db) PUT IMPEDANCE (Ω) GAIN AND PHASE vs. FREQUENCY MAX k k k M M FREQUENCY (Hz) A VCL = +V/V PUT IMPEDANCE vs. FREQUENCY MAX465-3B PHASE (DEGREES) GAIN (db) SUPPLY CURRENT (ma) GAIN AND PHASE vs. FREQUENCY (C L = 5pF) MAX k k k M M FREQUENCY (Hz) A VCL = +V/V C L = 5pF SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE = +6.5V = +.7V MAX PHASE (DEGREES) PSRR (db) SUPPLY CURRENT (µa) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY A VCL = + -9 k k k M M M FREQUENCY (Hz) SHUTDOWN SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE = +6.5V = +.7V MAX465-3A MAX465-5 MAX465 MAX469. k k k M M FREQUENCY (Hz) INPUT BIAS CURRENT (na) INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE = +.7V = +6.5V MAX465-6 INPUT BIAS CURRENT (na) INPUT BIAS CURRENT vs. TEMPERATURE = +.7V, V CM = = +6.5V, V CM = = +6.5V, V CM = V EE = +.7V, V CM = V EE MAX465-7 VOLTAGE (mv) INPUT OFFSET VOLTAGE vs. TEMPERATURE SOT3-5 PACKAGE SO PACKAGE MAX COMMON-MODE VOLTAGE (V)

6 MAX465 MAX469 Typical Operating Characteristics (continued) ( = +5.V, V EE = V, R L = kω, T A = +5 C, unless otherwise noted.) MINIMUM OPERATING VOLTAGE (V) MINIMUM OPERATING VOLTAGE vs. TEMPERATURE MAX465-9 CMRR (db) COMMON-MODE REJECTION RATIO vs. TEMPERATURE MAX465- LARGE-SIGNAL GAIN (db) LARGE-SIGNAL GAIN vs. PUT VOLTAGE (SINKING, = 6.5V) R L = kω R L = kω R L = Ω = +6.5V R L to PUT VOLTAGE (V) MAX465-5 LARGE-SIGNAL GAIN vs. PUT VOLTAGE (SOURCING, = 6.5V) R L = kω MAX465- LARGE-SIGNAL GAIN vs. PUT VOLTAGE (SINKING, =.7V) R L = kω R L = kω MAX465-3 LARGE-SIGNAL GAIN vs. PUT VOLTAGE (SOURCING, =.7V) R L = kω MAX465-4 LARGE-SIGNAL GAIN (db) 5 5 R L = kω R L = Ω LARGE-SIGNAL GAIN (db) R L = Ω LARGE-SIGNAL GAIN (db) R L = Ω R L = kω PUT VOLTAGE (V) = +6.5V R L to V EE PUT VOLTAGE (V) = +.7V R L to PUT VOLTAGE (V) = +.7V R L to V EE LARGE-SIGNAL GAIN (db) LARGE-SIGNAL GAIN vs. TEMPERATURE (R L = Ω) = +.7V R L to V p-p = - V R L = Ω = +6.5V R L to = +6.5V R L to V EE = +.7V R L to V EE MAX465-5 LARGE-SIGNAL GAIN (db) LARGE-SIGNAL GAIN vs. TEMPERATURE (R L = kω) = +.7V R L to or V EE V p-p = - V R L = kω = +6.5V R L to or V EE MAX465-5a V - VEE (mv) R L to PUT VOLTAGE LOW vs. TEMPERATURE = +6.5V, R L = Ω = +.7V, R L = Ω = +6.5V, R L = kω = +.7V, R L = kω MAX

7 Typical Operating Characteristics (continued) ( = +5.V, V EE = V, R L = kω, T A = +5 C, unless otherwise noted.) PUT VOLTAGE HIGH (mv) R L to V EE PUT VOLTAGE HIGH vs. TEMPERATURE = +6.5V, R L = Ω = +.7V, R L = Ω = +6.5V OR +.7V, R L = kω MAX465-7 THD + NOISE (%) TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY V = Vp-p 5kHz LOWPASS FILTER R L = kω TO / k k k FREQUENCY (Hz) MAX465-8 THD + NOISE (%)... TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK PUT VOLTAGE R L = 5Ω f = khz R L to / R L = 5Ω R L = kω R L = kω PEAK-TO-PEAK PUT (V) MAX465-9 MAX465 MAX469 CHANNEL-TO-CHANNEL ISOLATION (db) 3 5 IN 5 (5mV/div) IN (5mV/div) CHANNEL-TO-CHANNEL ISOLATION vs. FREQUENCY k k k M FREQUENCY (Hz) MAX465-9a M (5mV/div) SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) MAX465- A VCL = +V/V TIME (5ns/div) (5mV/div) SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX465- A VCL = -V/V TIME (5ns/div) LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) MAX465- A VCL = +V/V LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX465-3 A VCL = -V/V IN (V/div) IN (V/div) (V/div) (V/div) TIME (5µs/div) TIME (5µs/div) 7

8 MAX465-MAX469 MAX465 MAX466 DIP/SO MAX DFN PIN MAX467 MAX468 DIP/SO MAX MAX469 NAME 6 4 Output, 5, 6 5, 7, 8, Pin Description FUNCTION N.C. No Connection. Not internally connected., 7, 3, 9, 7, Outputs for Amplifiers and Negative Supply. Ground for singlesupply operation V EE 3 3 IN+ Noninverting Input, 6,, 8, 6 IN-, IN- Inverting Inputs for Amplifiers and 4 7 IN- Inverting Input 3, 5 3, 3, 7 3, 5 IN+, IN+ Noninverting Inputs for Amplifiers and Positive Supply 6, 9 5, 6 SHDN, SHDN Active-Low Shutdown Inputs for Amplifiers and. Drive low for shutdown mode. Drive high or connect to for normal operation. 8 8 SHDN Active-Low Shutdown Input. Drive low for shutdown mode. Drive high or connect to for normal operation. 8, 4 3, 4 Outputs for Amplifiers 3 and 4 9, 3 IN3-, IN4- Inverting Inputs for Amplifiers 3 and 4, IN3+, IN4+ Noninverting Inputs for Amplifiers 3 and 4 8

9 Applications Information Package Power Dissipation Warning: Due to the high output current drive, this op amp can exceed the absolute maximum power-dissipation rating. As a general rule, as long as the peak current is less than or equal to 8mA, the maximum package power dissipation will not be exceeded for any of the package types offered. There are some exceptions to this rule, however. The absolute maximum power-dissipation rating of each package should always be verified using the following equations. The following equation gives an approximation of the package power dissipation: where: VRMS = the RMS voltage from VCC to V when sourcing current IRMS ( ) θ P IC DISS V RMS I RMS COS = the RMS voltage from V to VEE when sinking current = the RMS current flowing out of or into the op amp and the load θ = the phase difference between the voltage and the current. For resistive loads, COS θ =. For example, the circuit in Figure has a package power dissipation of 57mW. V V RMS ( VDC ) PEAK. 5V = 6. 5V 3. 5V =. 89VRMS I + I PEAK 3. 5V. 5V / 6Ω RMS IDC = + 6Ω = 7. 84mARMS Therefore, PIC(DISS) = VRMS IRMS COS θ = 57mW Adding a coupling capacitor improves the package power dissipation because there is no DC current to the load, as shown in Figure. V V RMS ( VDC ) PEAK. 5V = 6. 5V 3. 5V =. 89VRMS I + I PEAK. 5V / 6Ω RMS IDC = A + = 7. 67mARMS V IN = 3Vp-p C R R Therefore, PIC(DISS) = VRMS IRMS COS θ = 38.6mW The absolute maximum power-dissipation rating of this package would be exceeded if the configuration in Figure were used with all four of the MAX469ESD s amplifiers at a high ambient temperature of +75 C (57mW x 4 amplifiers = 68mW + a derating of 8.33mW/ C x 5 C = 669mW). Note that 669mW just exceeds the absolute maximum power dissipation of 667mW for the 4-pin SO package (see the Absolute Maximum Ratings section). 6.5V MAX465 MAX466 6Ω Figure. A Circuit Example where the MAX465/MAX466 is Being Used in Single-Supply Operation V IN = 3Vp-p C C = π R L f L C R R 6.5V MAX465 MAX466 Figure. A Circuit Example where Adding a Coupling Capacitor Greatly Reduces the Power Dissipation of Its Package C C 6Ω MAX465 MAX469 9

10 MAX465 MAX469 INPUT.5Vp-p.µF k = +3V 4.7k 4.7k k k µf k k k = +3V / MAX467 / MAX468 9k = +3V / MAX467 / MAX468 47Ω.µF 3Ω R3 = R R R3 R Figure 4. Reducing Offset Error Due to Bias Current (Noninverting) R MAX465 MAX466 MAX467 MAX468 MAX469 Figure 3. Dual MAX467/MAX468 Bridge Amplifier for mw at 3V Single-Supply Speaker Driver The MAX465/MAX466 can be used as a single-supply speaker driver, as shown in the Typical Operating Circuit. Capacitor C is used for blocking DC (a.µf ceramic capacitor can be used). When choosing resistors R3 and R4, take into consideration the input bias current as well as how much supply current can be tolerated. Choose resistors R and R according to the amount of gain and current desired. Capacitor C3 ensures unity gain for DC. A µf electrolytic capacitor is suitable for most applications. The coupling capacitor C sets a low-frequency pole and is fairly large in value. For a 3Ω load, a µf coupling capacitor gives a low-frequency pole at 5Hz. The low-frequency pole can be set according to the following equation: ƒ = / π (RLC) Bridge Amplifier The circuit shown in Figure 3 uses a dual MAX467/ MAX468 to implement a 3V, mw amplifier suitable for use in size-constrained applications. This configuration eliminates the need for the large coupling capacitor required by the single op-amp speaker driver when single-supply operation is a must. Voltage gain is set to +V/V; however, it can be changed by adjusting the 9kΩ resistor value. DC voltage at the speaker is limited to mv. The 47Ω and.µf capacitors across the speaker maintain a low impedance at the load as frequency increases. R3 = R R R3 R Rail-to-Rail Input Stage Devices in the MAX465 MAX469 family of high-output-current amplifiers have rail-to-rail input and output stages designed for low-voltage, single-supply operation. The input stage consists of separate NPN and PNP differential stages that combine to provide an input common-mode range that extends.5v beyond the supply rails. The PNP stage is active for input voltages close to the negative rail, and the NPN stage is active for input voltages near the positive rail. The switchover transition region, which occurs near VCC /, has been extended to minimize the slight degradation in common-mode rejection ratio caused by mismatch of the input pairs. R MAX465 MAX466 MAX467 MAX468 MAX469 Figure 5. Reducing Offset Error Due to Bias Current (Inverting)

11 kω kω MAX465 MAX469 Figure 6. Input Protection Circuit Since the input stage switches between the NPN and PNP pairs, the input bias current changes polarity as the input voltage passes through the transition region. Match the effective impedance seen by each input to reduce the offset error caused by input bias currents flowing through external source impedances (Figures 4 and 5). High source impedances, together with input capacitance, can create a parasitic pole that produces an underdamped signal response. Reducing the input impedance or placing a small (pf to pf) capacitor across the feedback resistor improves response. The MAX465 MAX469 s inputs are protected from large differential input voltages by kω series resistors and back-to-back triple diodes across the inputs (Figure 6). For differential voltages less than.8v, input resistance is typically 5kΩ. For differential input voltages greater than.8v, input resistance is approximately kω. The input bias current is given by the following equation: IBIAS = (VDIFF -.8V) / kω Rail-to-Rail Output Stage The minimum output is within millivolts of ground for single-supply operation, where the load is referenced to ground (VEE). Figure 7 shows the input voltage range and the output voltage swing of a MAX465 connected as a voltage follower. The maximum output voltage swing is load dependent; however, it is guaranteed to be within 43mV of the positive rail (VCC = 5V) even with maximum load (5Ω to ground). IN (V/div) (V/div) = +3.V R L = kω TIME (5µs/div) Figure 7. Rail-to-Rail Input/Output Range Driving Capacitive Loads The MAX465 MAX469 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 5pF. Figure 8 is a graph of the stable operating region for various capacitive loads vs. resistive loads. Figures 9 and show the transient response with excessive capacitive loads (5pF), with and without the addition of an isolation resistor in series with the output. Figure shows a typical noninverting capacitive-load-driving circuit in the unity-gain configuration. The resistor improves the circuit s phase margin by isolating the load capacitor from the op amp s output. MAX465-fig7

12 MAX465 MAX469 CAPACITIVE LOAD (pf) 3 V CC = +5.V R L to / 9 8 UNSTABLE REGION STABLE REGION k k k Figure 8. Capacitive-Load Stability RESISTIVE LOAD (kω) MAX465-fig8 IN (mv/div) (mv/div) = +3.V, C L = 5pF R L = kω, R ISO = Ω TIME (µs/div) Figure 9. Small-Signal Transient Response with Excessive Capacitive Load MAX465-fig9 = +3.V, C L = 5pF R L = kω, R ISO = 39Ω MAX465-fig IN (mv/div) R ISO (mv/div) C L TIME (µs/div) Figure. Small-Signal Transient Response with Excessive Capacitive Load with Isolation Resistor Power-Up and Shutdown Modes The MAX466/MAX468 have a shutdown option. When the shutdown pin (SHDN) is pulled low, supply current drops to 58µA per amplifier (VCC = +5V), the amplifiers are disabled, and their outputs are placed in a high-impedance state. Pulling SHDN high or leaving it floating enables the amplifier. In the dual MAX468, the two amplifiers shut down independently. Figures and 3 show the MAX466 s output voltage and supply-current responses to a shutdown pulse. The MAX466 MAX469 typically settle within 5µs after power-up (Figure 4). Figure. Capacitive-Load-Driving Circuit Power Supplies and Layout The MAX465 MAX469 can operate from a single +.7V to +6.5V supply, or from dual ±.35V to ±3.5V supplies. For single-supply operation, bypass the power supply with a.µf ceramic capacitor in parallel with at least µf. For dual-supply operation, bypass each supply to ground. Good layout improves performance by decreasing the amount of stray capacitance at the op amps inputs and outputs. Decrease stray capacitance by placing external components close to the op amps pins, minimizing trace and lead lengths.

13 SHDN (V/div) (V/div) TIME (5µs/div) Figure. Shutdown Output Voltage Enable/Disable MAX465-fig SHDN (V/div) I CC (ma/div) TIME (5µs/div) Figure 3. Shutdown Enable/Disable Supply Current MAX465-fig3 MAX465 MAX469 (V/div) MAX465-fig4 MAX465-fig5 (V/div) (V/div) I EE (ma/div) TIME (5µs/div) TIME (5µs/div) Figure 4. Power-Up/Down Output Voltage Figure 5. Power-Up/Down Supply Current 3

14 MAX465 MAX469 TOP VIEW 3 4 MAX466 DIP/SO/μMAX SHDN N.C. IN+ N.C. V EE 3 4 MAX466 μdfn (mm x mm x.8mm) Pin Configurations (continued) SHDN IN- N.C. IN- IN- IN+ V EE 3 4 MAX467 DIP/SO N.C. IN- IN+ V EE IN+ IN- IN- IN+ 3 MAX V EE 4 7 IN+ SHDN 5 6 SHDN μmax IN4- IN- 3 IN- IN+ 3 IN- IN+ 3 IN4+ V EE 4 MAX468 IN+ 4 MAX469 V EE N.C. 5 N.C. IN+ 5 IN3+ SHDN 6 9 SHDN IN3- IN- 6 9 N.C. 7 8 N.C DIP/SO DIP/SO 4

15 V IN C Typical Operating Circuit R3 R4 R C3 MAX465 MAX466 R C 3Ω Ordering Information (continued) PART TEMP RANGE PIN- PACKAGE TOP MARK MAX467EPA -4 C to +85 C 8 Plastic DIP MAX467ESA -4 C to +85 C 8 SO MAX468EPD -4 C to +85 C 4 Plastic DIP MAX468ESD -4 C to +85 C 4 SO MAX468EUB -4 C to +85 C μmax MAX469EPD -4 C to +85 C 4 Plastic DIP MAX469ESD -4 C to +85 C 4 SO Chip Information MAX465 TRANSISTOR COUNT: 3 MAX466 TRANSISTOR COUNT: 3 MAX467 TRANSISTOR COUNT: 46 MAX468 TRANSISTOR COUNT: 46 MAX469 TRANSISTOR COUNT: 94 MAX465-MAX469 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to 8 Ø.5±. D E H 4X S BOTTOM VIEW 8 DIM A A INCHES MIN MAX BSC A.3 b c D e E H L α S BSC MILLIMETERS MIN MAX BSC BSC 8LUMAXD.EPS TOP VIEW A A A e b c L α FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE LINE, 8L umax/usop DOCUMENT CONTROL NO. -36 REV. J APPROVAL 5

16 MAX465-MAX469 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to SOT-3 5L.EPS PACKAGE LINE, SOT-3, 5L -57 E.6±. e Ø.5±..6±. TOP VIEW 4X S H BOTTOM VIEW INCHES DIM A A MIN -. MAX.43.6 MIN -.5 MAX..5 A D D E E H L MILLIMETERS L.37 REF.94 REF b e.97 BSC.5 BSC c S.96 REF.498 REF α 6 6 LUMAX.EPS D E GAGE PLANE A A c D b A α E L L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE LINE, L umax/usop APPROVAL DOCUMENT CONTROL NO. -6 REV. 6

17 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to D XXXX XXXX XXXX PIN INDEX AREA SAMPLE MARKING 7 A E A b A A L L C L e e EVEN TERMINAL A A (N/ -) x e) b N e C L ODD TERMINAL SOLDER MASK COVERAGE PIN.x45 L L 6, 8, L UDFN.EPS MAX465-MAX469 -DRAWING NOT TO SCALE- PACKAGE LINE, 6, 8, L udfn, xx.8 mm -64 A COMMON DIMENSIONS SYMBOL MIN. NOM. MAX. A A A D E L L. REF. PACKAGE VARIATIONS PKG. CODE N e b (N/ -) x e L BSC.3±.5.3 REF. L8-8.5 BSC.5±.5.5 REF. L-.4 BSC.±.3.6 REF. PACKAGE LINE, 6, 8, L udfn, xx.8 mm -DRAWING NOT TO SCALE- -64 A Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

18 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX466EUA+ MAX467ESA+ MAX468EUB+ MAX465EUK+T MAX465EUK-T MAX466ELA+T MAX466ESA+ MAX466ESA+T MAX466EUA+T MAX467EPA MAX467EPA+ MAX467ESA MAX467ESA+T MAX468EPD+ MAX468ESD+ MAX468ESD+T MAX468EUB MAX468EUB+T MAX467ESA-T MAX468EUB-T MAX466EPA+