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 to.% Excellent video specifications. db flatness: 4 MHz Differential gain:.% Differential phase:.9 Single-supply operation:.7 V to 6 V Rail-to-rail output Output swings to within 8 mv of either rail Low voltage offset:.6 mv APPLICATIONS Portable multimedia players Video cameras Digital still cameras Consumer video Clock buffers GENERAL DESCRIPTION High Speed, Rail-to-Rail Output Op Amps with Ultralow Power-Down ADA485-/ADA485- POWER DOWN V OUT IN +IN 3 V S 4 PIN CONFIGURATIONS NC IN 3 +IN 4 ADA485- NC = NO CONNECT 8 +V S 7 OUTPUT 6 NC 5 V S Figure. 8-Lead, 3 mm 3 mm LFCSP +V S V OUT IN 9 +IN NC = NO CONNECT Figure. 6-Lead, 3 mm 3 mm LFCSP The ADA485-/ADA485- are low price, high speed, voltage feedbacks rail-to-rail output op amps with ultralow powerdown. Despite their low price, the ADA485-/ADA485- provide excellent overall performance and versatility. The 75 MHz, 3 db bandwidth and V/μs slew rate make these amplifiers well-suited for many general-purpose, high speed applications. The ADA485-/ADA485- are designed to operate at supply voltages as low as.7 V and up to 6 V at.4 ma of supply current per amplifier. In power-down mode, the supply current is less than 5 na, ideal for battery-powered applications. The ADA485 family provides users with a true single-supply capability, allowing input signals to extend mv below the negative rail and to within. V of the positive rail. The output of the amplifier can swing within 8 mv of either supply rail. With its combination of low price, excellent differential gain (.%), differential phase (.9 ), and. db flatness out to 4 MHz, these amplifiers are ideal for video applications. The ADA485-/ADA485- are designed to work in the extended temperature range of 4 C to +5 C. CLOSED-LOOP GAIN (db) 6 5 NC ADA485- Patents pending. G = + R L = kω V OUT =.V p-p Figure 3. Small Signal Frequency Response 53-43 53-6 53-54 Rev. B 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 96, Norwood, MA 6-96, U.S.A. Tel: 78.39.47 www.analog.com Fax: 78.46.33 5 7 Analog Devices, Inc. All rights reserved.
ADA485-/ADA485- TABLE OF CONTENTS Features... Applications... Pin Configurations... General Description... Revision History... Specifications... 3 Specifications with +3 V Supply... 3 Specifications with +5 V Supply... 4 Absolute Maximum Ratings... 5 Thermal Resistance... 5 ESD Caution...5 Typical Performance Characteristics...6 Circuit Description... Headroom and Overdrive Recovery Considerations... Operating the ADA485-/ADA485- on Bipolar Supplies... 3 Power-Down Pins... 3 Outline Dimensions... 4 Ordering Guide... 4 REVISION HISTORY /7 Rev. A to Rev. B Changes to Applications... Updated Outline Dimensions... 4 Changes to Ordering Guide... 4 4/5 Rev. to Rev. A Added ADA485-...Universal Added 8-Lead LFCSP...Universal Changes to Features... Changes to General Description... Changes to Figure 3... Changes to Table... 3 Changes to Table... 4 Changes to Power-Down Pins Section and Table 5... 3 Updated Outline Dimensions... 4 Changes to Ordering Guide... 4 /5 Revision : Initial Version Rev. B Page of 6
ADA485-/ADA485- SPECIFICATIONS SPECIFICATIONS WITH +3 V SUPPLY TA = 5 C, RF = Ω for G = +, RF = kω for G > +, RL = kω, unless otherwise noted. Table. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE 3 db Bandwidth G = +, VO =. V p-p 6 MHz G = +, VO =.5 V p-p, RL = 5 Ω 45 MHz Bandwidth for. db Flatness G = +, VO =.5 V p-p, RL = 5 Ω 4 MHz Slew Rate G = +, VO = V step V/μs Settling Time to.% G = +, VO = V step, RL = 5 Ω 8 ns NOISE/DISTORTION PERFORMANCE Harmonic Distortion (dbc) HD/HD3 fc = MHz, VO = V p-p, G = +3, RL = 5 Ω 7/ 77 dbc Input Voltage Noise f = khz nv/ Hz Input Current Noise f = khz.5 pa/ Hz Differential Gain G = +3, NTSC, RL = 5 Ω, VO = V p-p. % Differential Phase G = +3, NTSC, RL = 5 Ω, VO = V p-p. Degrees DC PERFORMANCE Input Offset Voltage.6 4. mv Input Offset Voltage Drift 4 μv/ C Input Bias Current.4 4.4 μa Input Bias Current Drift 4 na/ C Input Bias Offset Current 3 na Open-Loop Gain VO =.5 V to.75 V 78 db INPUT CHARACTERISTICS Input Resistance Differential/common-mode.5/5. MΩ Input Capacitance. pf Input Common-Mode Voltage Range. to +.8 V Input Overdrive Recovery Time (Rise/Fall) VIN = +3.5 V to.5 V, G = + 6/5 ns Common-Mode Rejection Ratio VCM =.5 V 76 8 db POWER-DOWN Power-Down Input Voltage Power-down ADA485-/ADA485- <.7/<.6 V Enabled ADA485-/ADA485- >.8/>.7 V Turn-Off Time.7 μs Turn-On Time 6 ns Power-Down Bias Current/ Power Down Pin Enabled Power-down = 3 V 37 55 μa Power-Down Power-down = V.. μa OUTPUT CHARACTERISTICS Output Overdrive Recovery Time (Rise/Fall) VIN = +.7 V to. V, G = +5 7/ ns Output Voltage Swing.6 to.83.3 to.9 V Short-Circuit Current Sinking/sourcing 5/74 ma POWER SUPPLY Operating Range.7 6 V Quiescent Current/Amplifier.4.8 ma Quiescent Current (Power-Down)/Amplifier 5 5 na Positive Power Supply Rejection +VS = +3 V to +4 V, VS = V 83 db Negative Power Supply Rejection +VS = +3 V, VS = V to V 83 db For operation on bipolar supplies, see the Operating the ADA485-/ADA485- on Bipolar Supplies section. Rev. B Page 3 of 6
ADA485-/ADA485- SPECIFICATIONS WITH +5 V SUPPLY TA = 5 C, RF = Ω for G = +, RF = kω for G > +, RL = kω, unless otherwise noted. Table. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE 3 db Bandwidth G = +, VO =. V p-p 75 MHz G = +, VO =.5 V p-p MHz Bandwidth for. db Flatness G = +, VO =.4 V p-p, RL = 5 Ω 9 MHz Slew Rate G = +, VO = 4 V step V/μs G = +, VO = V step 6 V/μs Settling Time to.% G = +, VO = V step, RL = 5 Ω 85 ns NOISE/DISTORTION PERFORMANCE Harmonic Distortion (dbc) HD/HD3 fc = MHz, VO = V p-p, G = +, RL = 5 Ω 8/ 86 dbc Input Voltage Noise f = khz nv/ Hz Input Current Noise f = khz.5 pa/ Hz Differential Gain G = +3, NTSC, RL = 5 Ω. % Differential Phase G = +3, NTSC, RL = 5 Ω.9 Degrees Crosstalk (RTI) ADA485- f = 4.5 MHz, RL = 5 Ω, VO = V p-p 6 db DC PERFORMANCE Input Offset Voltage.6 4. mv Input Offset Voltage Drift 4 μv/ C Input Bias Current.3 4. μa Input Bias Current Drift 4 na/ C Input Bias Offset Current 3 na Open-Loop Gain VO =.5 V to.75 V 83 5 db INPUT CHARACTERISTICS Input Resistance Differential/common-mode.5/5. MΩ Input Capacitance. pf Input Common-Mode Voltage Range. to +.8 V Input Overdrive Recovery Time (Rise/Fall) VIN = +5.5 V to.5 V, G = + 5/4 ns Common-Mode Rejection Ratio VCM =. V 85 db POWER-DOWN Power-Down Input Voltage Power-down ADA485-/ADA485- <.7/<.6 V Enabled ADA485-/ADA485- >.8/>.7 V Turn-Off Time.7 μs Turn-On Time 5 ns Power-Down Bias Current/Power Down Pin Enabled Power-down = 5 V.5.3 ma Power-Down Power-down = V.. μa OUTPUT CHARACTERISTICS Output Overdrive Recovery Time (Rise/Fall) VIN = +. V to. V, G = +5 6/7 ns Output Voltage Swing.4 to 4.83.7 to 4.9 V Short-Circuit Current Sinking/sourcing 8/94 ma POWER SUPPLY Operating Range.7 6 V Quiescent Current/Amplifier.5.9 ma Quiescent Current (Power-Down)/Amplifier 5 5 na Positive Power Supply Rejection +VS = +5 V to +6 V, VS = V 84 db Negative Power Supply Rejection +VS = +5 V, VS = V to V 84 db For operation on bipolar supplies, see the Operating the ADA485-/ADA485- on Bipolar Supplies section. Rev. B Page 4 of 6
ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating Supply Voltage.6 V Power Dissipation See Figure 4 Power Down Pin Voltage ( VS + 6) V Common-Mode Input Voltage ( VS.5 ) V to (+VS +.5) V Differential Input Voltage +VS to VS Storage Temperature 65 C to +5 C Operating Temperature Range 4 C to +5 C Lead Temperature Range 3 C (Soldering sec) Junction Temperature 5 C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. THERMAL RESISTANCE θja is specified for the worst-case conditions, that is, θja is specified for the device soldered in the circuit board for surface-mount packages. Table 4. Package Type θja Unit 6-Lead LFCSP 9 C/W 8-Lead LFCSP 8 C/W Maximum Power Dissipation The maximum safe power dissipation for the ADA485-/ ADA485- is limited by the associated rise in junction temperature (TJ) on the die. At approximately 5 C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit may change the stresses that the package exerts on the die, permanently shifting the parametric performance of the ADA485-/ADA485-. Exceeding a junction temperature of 5 C for an extended period of time can result in changes in silicon devices, potentially causing degradation or loss of functionality. ADA485-/ADA485- The power dissipated in the package (PD) is the sum of the quiescent power dissipation and the power dissipated in the die due to the ADA485-/ADA485- drive at the output. The quiescent power is the voltage between the supply pins (VS) times the quiescent current (IS). PD = Quiescent Power + (Total Drive Power Load Power) P D = ( V I ) S S VS + V R OUT L V R OUT RMS output voltages should be considered. If RL is referenced to VS, as in single-supply operation, the total drive power is VS IOUT. If the rms signal levels are indeterminate, consider the worst case, when VOUT = VS/4 for RL to midsupply. P D = ( V I ) S S + ( V / 4) S R L In single-supply operation with RL referenced to VS, the worst case is VOUT = VS/. Airflow increases heat dissipation, effectively reducing θja. Also, more metal directly in contact with the package leads and exposed paddle from metal traces through holes, ground, and power planes reduce θja. Figure 4 shows the maximum safe power dissipation in the package vs. the ambient temperature for the LFCSP (9 C/W) package on a JEDEC standard 4-layer board. θja values are approximations. MAXIMUM POWER DISSIPATION (W).5..5..5 LFCSP-6 LFCSP-8 5 5 5 5 5 5 35 45 55 65 75 85 95 5 5 5 AMBIENT TEMPERATURE ( C) Figure 4. Maximum Power Dissipation vs. Temperature for a 4-Layer Board ESD CAUTION L 53-55 Rev. B Page 5 of 6
ADA485-/ADA485- TYPICAL PERFORMANCE CHARACTERISTICS TA = 5 C, RF = Ω for G = +, RF = kω for G > +, RL = kω, unless otherwise noted. NORMALIZED CLOSED-LOOP GAIN (db) G = + G = + R L = 5Ω V OUT =.V p-p G = CLOSED-LOOP GAIN (db) 4 3 G = + R L = kω V OUT =.V p-p pf pf 6pF 6 Figure 5. Small Signal Frequency Response for Various Gains 53-44 6 3 Figure 8. Small Signal Frequency Response for Various Capacitor Loads 53-7 CLOSED-LOOP GAIN (db) 6 G = + V OUT =.V p-p R L = 5Ω 6. 5.9 V R L = kω S = 5V, V OUT = V p-p 5.8, V OUT =.4V p-p Figure 6. Small Signal Frequency Response for Various Loads 53-45 GAIN (db) 6. 6. 5.7 5.6 5.5 5.4 k, V OUT =.5V p-p, V OUT =.V p-p M M FREQUENCY (Hz) Figure 9.. db Flatness Response G = + R L = 5Ω M 53-47 CLOSED-LOOP GAIN (db) 3 6 G = + R L = 5Ω V OUT =.V p-p Figure 7. Small Signal Frequency Response for Various Supplies 53-46 CLOSED-LOOP GAIN (db) 6 7 R L = 5Ω R L = kω G = + V OUT =.5V p-p Figure. Large Frequency Response for Various Loads 53-48 Rev. B Page 6 of 6
ADA485-/ADA485- CLOSED-LOOP GAIN (db) 3 G = + R L = kω V OUT =.V p-p +5 C C +5 C +85 C SLEW RATE (V/μs) 3 5 5 G = + R L = kω NEGATIVE SLEW RATE POSITIVE SLEW RATE 5 Figure. Small Signal Frequency Response for Various Temperatures 53-57.5..5..5 3. 3.5 4. 4.5 OUTPUT VOLTAGE STEP (V) Figure 4. Slew Rate vs. Output Voltage 5. 53-4 CLOSED-LOOP GAIN (db) 3 G = + R L = kω V OUT =.V p-p +5 C k +85 C, 5V, ADA485- +5 C, 5V, ADA485- ENABLE C, 5V, ADA485- POWER DOWN SUPPLY CURRENT (μa) k Figure. Small Signal Frequency Response for Various Temperatures 53-98..5..5..5 3. 3.5 4. 4.5 5. POWER-DOWN VOLTAGE (V) Figure 5. Supply Current vs. Power-Down Voltage 53-36 OPEN-LOOP GAIN (db) 4 8 6 4 GAIN PHASE 6 9 8 OPEN-LOOP PHASE (Degrees) CROSSTALK (db) 6 7 8 9 G = + R L = 5Ω V OUT = V p-p V OUT TO V OUT V OUT TO V OUT k k k M M M G FREQUENCY (Hz) Figure 3. Open-Loop Gain and Phase vs. Frequency 53- k M M M FREQUENCY (Hz) Figure 6. Crosstalk vs. Frequency 53-37 Rev. B Page 7 of 6
ADA485-/ADA485- G = + V OUT = 5mV p-p.575.55 G = + R L = 5Ω pf pf HARMONIC DISTORTION (dbc) 6 7 8 9 R L = 5Ω HD R L = kω HD R L = kω HD3 R L = 5Ω HD3 OUTPUT VOLTAGE (V).55.5.475.45. Figure 7. Harmonic Distortion vs. Frequency for Various Loads 53-.45 4 6 8 4 6 8 TIME (ns) Figure. Small Signal Transient Response for Capacitive Load 53- HARMONIC DISTORTION (dbc) 6 7 8 9 G = + R L = kω V OUT = mv p-p HD V OUT = 5mV p-p HD V OUT = mv p-p HD3.5 V OUT = 5mV p-p. HD3. Figure 8. Harmonic Distortion vs. Frequency for Various VOUT 53-3 OUTPUT VOLTAGE FOR 5V SUPPLY (V) 3.5 3..75.5 G = + R L = kω.75 5 5 TIME (ns) Figure. Large Signal Transient Response 53-5 OUTPUT VOLTAGE (V).65.6.55.5.45.4 G = + R L = kω OUTPUT VOLTAGE FOR 5V SUPPLY (V).875.75.65.5.375.5 G = + R L = kω.875.75.65.5.375.5 OUTPUT VOLTAGE FOR 3V SUPPLY (V).35 5 5 TIME (ns) Figure 9. Small Signal Transient Response for Various Supplies 53-9.5.5 5 5 TIME (ns) Figure. Large Signal Transient Response for Various Supplies 53-49 Rev. B Page 8 of 6
ADA485-/ADA485-6 5 G = + f IN = 4kHz VOLTAGE (V) 4 3 V DISABLE VOLTAGE NOISE (nv/ Hz) V OUT 5 3 45 TIME (μs) Figure 3. Enable/Disable Time 53-5 k k k M M M FREQUENCY (Hz) Figure 6. Voltage Noise vs. Frequency 53-59 INPUT AND OUTPUT VOLTAGE (V) 5.5 5. 4.5 4. 3.5 3..5..5..5 OUTPUT INPUT.5 3 4 5 6 7 8 9 TIME (ns) Figure 4. Input Overdrive Recovery G = + R L = 5Ω f = MHz 53-58 CURRENT NOISE (pa/ Hz) k k k M M M G FREQUENCY (Hz) Figure 7. Current Noise vs. Frequency 53-95 INPUT AND OUTPUT VOLTAGE (V) 3.5 3..5..5..5 5 INPUT OUTPUT G = +5 R L = 5Ω f = MHz COUNT 35 3 5 5 5 N = 7 x = 45μV σ = 75μV.5 3 4 5 6 7 8 9 TIME (ns) 53-6 3 4 V OFFSET (mv) 53-65 Figure 5. Output Overdrive Recovery Figure 8. Input Offset Voltage Distribution Rev. B Page 9 of 6
ADA485-/ADA485-4. 38 36.4 +I B V OS (μv) 34 3 3 8 6 4..5.5..5..5 3. 3.5 V CM (V) 53-63 INPUT BIAS CURRENT (μa).6.8 I B...4 5 35 5 65 8 95 5 TEMPERATURE ( C) 53-9 Figure 9. Input Offset Voltage vs. Common-Mode Voltage Figure 3. Input Bias Current vs. Temperature for Various Supplies OUTPUT SATURATION VOLTAGE (V).6.5.4.3.. +V SAT V SAT V S V 75 OUT 7 5 5 5 3 35 4 45 5 LOAD CURRENT (ma) Figure 3. Output Saturation Voltage vs. Load Current (Voltage Differential from Rails) 53-64 OUTPUT SATURATION VOLTAGE (mv) 95 9 85 8 R L = kω +V S V OUT 65 5 35 5 65 8 95 5 TEMPERATURE ( C) Figure 33. Output Saturation Voltage vs. Temperature (Voltage Differential from Rails) 53-6 4.9 POWER-DOWN PIN BIAS CURRENT (μa) 4 6 8 4 6 5 35 5 65 8 95 5 TEMPERATURE ( C) Figure 3. Power-Down Bias Current vs. Temperature for Various Supplies 53-9 SUPPLY CURRENT (ma) 4.8 4.7 4.6 4.5 4.4 4.3 4. 5 35 5 65 8 95 5 TEMPERATURE ( C) Figure 34. Current vs. Temperature for Various Supplies 53-9 Rev. B Page of 6
ADA485-/ADA485- POWER SUPPLY REJECTION (db) 6 7 8 9 +PSR PSR COMMON-MODE REJECTION (db) 6 7 8 9 CHANNEL CHANNEL k k k M M M FREQUENCY (Hz) Figure 35. Power Supply Rejection (PSR) vs. Frequency 53-94 k k k M M M FREQUENCY (Hz) Figure 37. Common-Mode Rejection (CMR) vs. Frequency 53-34.7.6 INPUT OFFSET VOLTAGE (mv).5.4.3... 5 35 5 65 8 95 5 TEMPERATURE ( C) Figure 36. Input Offset Voltage vs. Temperature for Various Supplies 53-93 Rev. B Page of 6
ADA485-/ADA485- CIRCUIT DESCRIPTION The ADA485-/ADA485- feature a high slew rate input stage that is a true single-supply topology, capable of sensing signals at or below the negative supply rail. The rail-to-rail output stage can swing to within 8 mv of either supply rail when driving light loads and within.7 V when driving 5 Ω. High speed performance is maintained at supply voltages as low as.7 V. HEADROOM AND OVERDRIVE RECOVERY CONSIDERATIONS Input The ADA485-/ADA485- are designed for use in low voltage systems. To obtain optimum performance, it is useful to understand the behavior of the amplifier as input and output signals approach the amplifier s headroom limits. The input common-mode voltage range extends mv below the negative supply voltage or ground for single-supply operation to within. V of the positive supply voltage. Therefore, in a gain of +3, the ADA485-/ADA485- can provide full railto-rail output swing for supply voltage as low as 3.3 V, assuming the input signal swing is from VS (or ground) to. V. Exceeding the headroom limit is not a concern for any inverting gain on any supply voltage, as long as the reference voltage at the amplifier s positive input lies within the amplifier s input common-mode range. The input stage sets the headroom limit for signals when the amplifier is used in a gain of + for signals approaching the positive rail. For high speed signals, however, there are other considerations. Figure 38 shows 3 db bandwidth vs. dc input voltage for a unity-gain follower. As the common-mode voltage approaches the positive supply, the bandwidth begins to drop when within V of +VS. This can manifest itself in increased distortion or settling time. GAIN (db) G = + R L = kω V OUT =.V p-p V CM = 3V V CM = 3.V V CM = 3.V V CM = 3.3V 6. Figure 38. Unity-Gain Follower Bandwidth vs. Frequency for Various Input Common-Mode 53-96 Higher frequency signals require more headroom than the lower frequencies to maintain distortion performance. Figure 39 illustrates how the rising edge settling time for the amplifier configured as a unity-gain follower stretches out as the top of a V step input approaches and exceeds the specified input common-mode voltage limit. OUTPUT VOLTAGE (V) 3.6 3.4 3. 3..8.6.4.. G = + R L = kω V STEP = V TO 3V V STEP =.V TO 3.V V STEP =.V TO 3.V V STEP =.3V TO 3.3V V STEP =.4V TO 3.4V.8 3 4 5 6 7 8 9 TIME (ns) Figure 39. Pulse Response, Input Headroom Limits The recovery time from input voltages. V or closer to the positive supply is approximately 5 ns, which is limited by the settling artifacts caused by transistors in the input stage coming out of saturation. The ADA485-/ADA485- do not exhibit phase reversal, even for input voltages beyond the voltage supply rails. Going more than.6 V beyond the power supplies turns on protection diodes at the input stage, which greatly increase the current draw of the devices. Output For signals approaching the negative supply and inverting gain, and high positive gain configurations, the headroom limit is the output stage. The ADA485-/ADA485- amplifiers use a common-emitter output stage. This output stage maximizes the available output range, limited by the saturation voltage of the output transistors. The saturation voltage increases with drive current, due to the output transistor collector resistance. As the saturation point of the output stage is approached, the output signal shows increasing amounts of compression and clipping. As in the input headroom case, higher frequency signals require a bit more headroom than the lower frequency signals. Output overload recovery is typically within 4 ns after the amplifier s input is brought to a nonoverloading value. 53-6 Rev. B Page of 6
ADA485-/ADA485- Figure 4 shows the output recovery transients for the amplifier recovering from a saturated output from the top and bottom supplies to a point at midsupply. INPUT AND OUTPUT VOLTAGE (V) 6.5 5.5 4.5 3.5.5.5.5.5 INPUT VOLTAGE EDGES V OUT = +.5V TO V V OUT =.5V TO V.5 3 4 5 6 7 8 9 TIME (ns) Figure 4. Overload Recovery G = R L = kω 53-4 OPERATING THE ADA485-/ADA485- ON BIPOLAR SUPPLIES The ADA485-/ADA485- can operate on bipolar supplies up to ±5 V. The only restriction is that the voltage between VS and the POWER DOWN pin must not exceed 6 V. Voltage differences greater than 6 V can cause permanent damage to the amplifier. For example, when operating on ±5 V supplies, the POWER DOWN pin must not exceed + V. POWER-DOWN PINS The ADA485-/ADA485- feature an ultralow power-down mode that lowers the supply current to less than 5 na. When a power-down pin is brought to within.6 V of the negative supply, the amplifier is powered down. Table 5 outlines the power-down pins functionality. To ensure proper operation, the power-down pins (PD, PD) should not be left floating. Table 5. Power-Down Pins Functionality 3 V and 5 V Supply Voltage ADA485- ADA485- Power Down V to.7 V V to.6 V Enabled.8 to +VS.7 V to +VS Rev. B Page 3 of 6
ADA485-/ADA485- OUTLINE DIMENSIONS 3.5 3. SQ.75.6 MAX.6 MAX.5 BSC PIN INDICATOR TOP VIEW.95.75 SQ.55 5 8 EXPOSED PAD (BOTTOM VIEW).6.45.3 MAX.7 MAX.5.4.3.9 MAX.65 TYP.85 NOM.5 MAX. NOM SEATING PLANE.3.3.8. REF 4.89.74.59 Figure 4. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD] 3 mm 3 mm Body, Very Thin, Dual Lead (CP-8-) Dimensions shown in millimeters PIN INDICATOR 657-B.45.5.4.6 MAX.3 PIN 6 INDICATOR PIN TOP.75 INDICATOR BSC SQ EXPOSED VIEW PAD 9 (BOTTOM VIEW) 4.5 8 5 BSC.5 MIN.5 REF.9.85.8 SEATING PLANE 3. BSC SQ MAX.8 MAX.65 TYP 3.5 MAX. NOM.3. REF.3.8 *COMPLIANT TO JEDEC STANDARDS MO--VEED- EXCEPT FOR EXPOSED PAD DIMENSION. Figure 4. 6-Lead Lead Frame Chip Scale Package [LFCSP_VQ] 3 mm 3 mm Body, Very Thin Quad (CP-6-3) Dimensions shown in millimeters *.65.5 SQ.35 ORDERING GUIDE Model Temperature Range Package Description Package Option Branding ADA485-YCPZ-R 4 C to +5 C 8-Lead Lead Frame Chip Scale Package (LFCSP_VD) CP-8- HWB ADA485-YCPZ-RL 4 C to +5 C 8-Lead Lead Frame Chip Scale Package (LFCSP_VD) CP-8- HWB ADA485-YCPZ-RL7 4 C to +5 C 8-Lead Lead Frame Chip Scale Package (LFCSP_VD) CP-8- HWB ADA485-YCPZ-R 4 C to +5 C 6-Lead Lead Frame Chip Scale Package (LFCSP_VQ) CP-6-3 HTB ADA485-YCPZ-RL 4 C to +5 C 6-Lead Lead Frame Chip Scale Package (LFCSP_VQ) CP-6-3 HTB ADA485-YCPZ-RL7 4 C to +5 C 6-Lead Lead Frame Chip Scale Package (LFCSP_VQ) CP-6-3 HTB Z = RoHS Compliant Part. Rev. B Page 4 of 6
ADA485-/ADA485- NOTES Rev. B Page 5 of 6
ADA485-/ADA485- NOTES 5 7 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D53--/7(B) Rev. B Page 6 of 6