AD8538

Low Power, Precision, Auto-Zero Op Amps AD8538/AD8539 FEATURES Low offset voltage: 13 μV maximum Input offset drift: 0.03 μV/°C Single-supply operation: 2.7 V to 5.5 V High gain, CMRR, and PSRR Low input bias current: 25 pA Low supply current: 180 μA PIN CONFIGURATIONS OUT V– +IN 1 5 V+ AD8538 2 3 4 –IN Figure 1. 5-Lead TSOT-23 (UJ-5) APPLICATIONS Mobile communications Portable instrumentation Battery-powered devices Sensor interfaces Temperature measurement Electronic scales NC 1 8 NC V+ −IN 2 +IN 3 V− AD8538 7 NC = NO CONNECT Figure 2. 8-Lead SOIC_N (R-8) GENERAL DESCRIPTION The AD8538/AD8539 are very high precision amplifiers featuring extremely low offset voltage, low input bias current, and low power consumption. The supply current is less than 215 μA maximujm per amplifier at 5.0 V. Operation is fully specified from 2.7 V to 5.0 V single supply (±1.35 V to ±2.5 V dual supply). The AD8538/AD8539 operate at very low power making these amplifiers ideal for battery-powered devices and portable equipment. The AD8538/AD8539 are specified over the extended industrial temperature range (−40°C to +125°C). The AD8538 amplifier is available in 5-lead TSOT-23, and 8-lead, narrow body SOIC packages, and the AD8539 amplifier is available in 8-lead, narrow body SOIC and 8-lead MSOP. OUT A 1 –IN A 2 +IN A 3 8 V+ OUT B +IN B 06741-033 06741-034 AD8539 7 6 5 TOP VIEW V– 4 (Not to Scale) –IN B Figure 3. 8-Lead SOIC_N (R-8) OUT A 1 –IN A 2 +IN A 3 V– 4 8 AD8539 TOP VIEW (Not to Scale) V+ OUT B –IN B +IN B 7 6 5 Figure 4. 8-Lead MSOP (RM-8) Rev. A 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 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2005–2007 Analog Devices, Inc. All rights reserved. 06741-001 6 OUT TOP VIEW 4 (Not to Scale) 5 NC 06741-002 TOP VIEW (Not to Scale) AD8538/AD8539 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AD8538 Electrical Specifications ............................................... 3 AD8539 Electrical Specifications ............................................... 5 Absolute Maximum Ratings ............................................................7 Thermal Resistance .......................................................................7 ESD Caution...................................................................................7 Typical Performance Characteristics ..............................................8 AD8538 Characteristics................................................................8 AD8539 Characteristics............................................................. 14 Outline Dimensions ....................................................................... 20 Ordering Guide .......................................................................... 21 REVISION HISTORY 5/07—Rev. 0 to Rev. A Added AD8539 ...................................................................Universal Changes to Specifications Section.................................................. 3 Added Table 3, Renumbered Tables Sequentially ........................ 5 Added Table 4, Renumbered Tables Sequentially ........................ 6 Changes to Thermal Resistance Section........................................ 7 Added Figure 32 and Figure 33..................................................... 13 Added AD8539 Characteristics Section, Renumbered Figures Sequentially ..................................................................................... 14 Updated Outline Dimensions....................................................... 20 Changes to Ordering Guide .......................................................... 21 10/05—Revision 0: Initial Version Rev. A | Page 2 of 24 AD8538/AD8539 SPECIFICATIONS AD8538 ELECTRICAL SPECIFICATIONS @ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25°C, unless otherwise specified. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS −40°C ≤ TA ≤ +125°C IB −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +125°C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High IOS −40°C ≤ TA ≤ +125°C CMRR AVO ΔVOS/ΔT VOH VCM = 0 V to 5 V −40°C ≤ TA ≤ +125°C, VCM = 0.2 V to 4.8 V RL = 10 kΩ, VO = 0.1 V to 4.9 V −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C RL = 100 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground RL = 10 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground RL = 100 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ RL = 10 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ 0 115 100 115 110 150 135 141 135 0.03 4.998 4.970 1.9 2.8 17 20 ±25 105 100 125 125 150 190 0.4 10 0.05 430 65 2.0 50 5 7 20 30 15 35 0.7 20 Conditions Min Typ 5 Max 13 30 25 100 1.0 50 150 5 Unit μV μV pA pA nA pA pA V dB dB dB dB μV/°C V V V V mV mV mV mV mA dB dB μA μA V/μs μs ms kHz Degrees μV p-p nV/√Hz 0.1 4.99 4.98 4.95 4.94 Output Voltage Low VOL Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density ISC PSRR ISY VS = 2.7 V to 5.0 V −40°C ≤ TA ≤ +125°C IO = 0 −40°C ≤ TA ≤ +125°C RL =10 kΩ G = ±1, 2 V step, CL = 20 pF, RL = 1 kΩ 180 215 SR tS GBP ØM en p-p en RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz Rev. A | Page 3 of 24 AD8538/AD8539 @ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise specified. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS −40°C ≤ TA ≤ +125°C IB −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +125°C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High IOS −40°C ≤ TA ≤ +125°C CMRR AVO ΔVOS/ΔT VOH VCM = 0 V to 2.5 V −40°C ≤ TA ≤ +125°C RL = 10 kΩ, VO = 0.1 V to 1.7 V −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C RL = 100 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground RL = 10 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground RL = 100 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ RL = 10 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ 0 110 100 110 105 140 135 140 135 0.03 2.698 2.68 1.7 2.4 14 20 ±8 105 100 125 125 150 190 0.35 5 0.05 430 65 2.0 50 5 5 20 25 15 35 0.7 20 Conditions Min Typ 5 Max 13 30 25 100 1.0 50 150 2.7 Unit μV μV pA pA nA pA pA V dB dB dB dB μV/°C V V V V mV mV mV mV mA dB dB μA μA V/μs μs ms kHz Degrees μV p-p nV/√Hz 0.1 2.68 2.68 2.67 2.66 Output Voltage Low VOL Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density ISC PSRR ISY VS = 2.7 V to 5.5 V −40°C ≤ TA ≤ +125°C IO = 0 −40°C ≤ TA ≤ +125°C RL = 10 kΩ G = ±1, 1 V step, CL = 20 pF, RL = 1 kΩ 180 215 SR tS GBP ØM en p-p en RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz Rev. A | Page 4 of 24 AD8538/AD8539 AD8539 ELECTRICAL SPECIFICATIONS @ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25°C, unless otherwise specified. Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS −40°C ≤ TA ≤ +125°C IB −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +125°C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High CMRR AVO ΔVOS/ΔT VOH −40°C ≤ TA ≤ +125°C VCM = 0 V to 5 V −40°C ≤ TA ≤ +125°C, VCM = 0.2 V to 4.8 V RL = 10 kΩ, VO = 0.1 V to 4.9 V −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C RL = 100 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground RL = 10 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground RL = 100 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ RL = 10 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ IOS −40°C ≤ TA ≤ +125°C 0 0.2 115 100 110 110 15 35 0.7 20 Conditions Min Typ 5 Max 15 30 60 125 1.0 70 400 5 4.8 Unit μV μV pA pA nA pA pA V V dB dB dB dB μV/°C V V V V mV mV mV mV mA dB dB μA μA V/μs μs ms kHz Degrees μV p-p nV/√Hz 135 130 130 125 0.03 4.994 4.97 5 6 20 24 ±25 0.1 4.99 4.98 4.95 4.94 Output Voltage Low VOL 7 8 25 30 Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density ISC PSRR ISY VS = 2.7 V to 5.0 V −40°C ≤ TA ≤ +125°C IO = 0 −40°C ≤ TA ≤ +125°C RL =10 kΩ G = ±1, 2 V step, CL = 20 pF, RL = 1 kΩ 105 100 125 125 170 210 225 SR tS GBP ØM en p-p en RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz 0.4 10 0.05 430 65 1.2 52 Rev. A | Page 5 of 24 AD8538/AD8539 @ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise specified. Table 4. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS −40°C ≤ TA ≤ +125°C IB −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +125°C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High CMRR AVO ΔVOS/ΔT VOH −40°C ≤ TA ≤ +125°C VCM = 0 V to 2.7 V −40°C ≤ TA ≤ +125°C, VCM = 0.2 V to 2.5 V RL = 10 kΩ, VO = 0.1 V to 2.6 V −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C RL = 100 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground RL = 10 kΩ to ground −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground RL = 100 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ RL = 10 kΩ to V+ −40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ IOS −40°C ≤ TA ≤ +125°C 0 0.2 110 100 110 105 15 35 0.7 20 Conditions Min Typ 5 Max 16 30 25 125 1.0 50 300 2.7 2.5 Unit μV μV pA pA nA pA pA V dB dB dB dB μV/°C V V V V mV mV mV mV mA dB dB μA μA V/μs μs ms kHz Degrees μV p-p nV/√Hz 130 125 130 125 0.03 2.693 2.68 5 6 14 20 ±8 0.1 2.68 2.68 2.67 2.66 Output Voltage Low VOL 7 8 20 25 Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density ISC PSRR ISY VS = 2.7 V to 5.5 V −40°C ≤ TA ≤ +125°C IO = 0 −40°C ≤ TA ≤ +125°C RL = 10 kΩ G = ±1, 1 V step, CL = 20 pF, RL = ∞ 105 100 125 125 210 225 0.35 8 0.05 430 65 2.0 55 SR tS GBP ØM en p-p en RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz Rev. A | Page 6 of 24 AD8538/AD8539 ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. Table 5. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Lead Temperature (Soldering, 60 sec) Operating Temperature Range Junction Temperature Range Rating +6 V VSS − 0.3 V to VDD + 0.3 V ±6 V Observe derating curve –65°C to +150°C 300°C –40°C to +125°C −65°C to +150°C THERMAL RESISTANCE θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 6. Thermal Characteristics Package Type 5-Lead TSOT-23 (UJ-5) 8-Lead SOIC_N (R-8) 8-Lead MSOP (RM-8) θJA 207 125 145 θJC 61 43 45 Unit °C/W °C/W °C/W ESD CAUTION 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. Absolute maximum ratings apply at 25°C, unless otherwise noted. Rev. A | Page 7 of 24 AD8538/AD8539 TYPICAL PERFORMANCE CHARACTERISTICS AD8538 CHARACTERISTICS AD8538 only, VSY = 5 V or ±2.5 V, unless otherwise noted. 450 400 350 300 250 200 150 100 06741-003 VSY = 5V 0V < VCM < 5V TA = 25°C INPUT BIAS CURRENT (pA) 700 600 500 400 300 200 100 0 25 VSY = 5V AND 2.7V NUMBER OF AMPLIFIERS 0 –10.0 –8.4 –6.8 –5.2 –3.6 –2.0 –0.4 1.2 2.8 4.4 6.0 7.6 9.2 INPUT OFFSET VOLTAGE (µV) 45 65 85 105 125 TEMPERATURE (°C) Figure 5. AD8538 Input Offset Voltage Distribution 14 12 NUMBER OF AMPLIFIERS SUPPLY CURRENT (µA) 160 Figure 8. AD8538 Input Bias Current vs. Temperature VSY = 5V –40°C < TA < +125°C TA = 25°C 140 120 100 80 60 40 06741-007 10 8 6 4 2 0 06741-004 20 0 0 0.012 0.024 0.036 0.048 0.060 0.072 0.084 0.096 0 1 2 3 4 5 TCVOS (µV/°C) SUPPLY VOLTAGE (V) Figure 6. AD8538 Input Offset Voltage Drift Distribution 10 8 INPUT OFFSET VOLTAGE (µV) 200 Figure 9. AD8538 Supply Current vs. Supply Voltage VSY = 5V TA = 25°C 6 4 2 0 –2 –4 –6 06741-005 SUPPLY CURRENT (µA) 150 VSY = 5V VSY = 2.7V 100 50 06741-008 –8 –10 0 1 2 3 4 5 0 –40 10 60 TEMPERATURE (°C) 110 INPUT COMMON-MODE VOLTAGE (V) Figure 7. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage Figure 10. AD8538 Supply Current vs. Temperature Rev. A | Page 8 of 24 06741-006 50 AD8538/AD8539 10000 VSY = 5V TA = 25°C 70 60 50 135 OUTPUT SATURATION VOLTAGE (mV) 1000 OPEN-LOOP GAIN (dB) VSY – VOH 100 VOL 10 SOURCE 40 30 20 ФM 10 0 90 45 1 SINK 06741-009 0 VSY = ±2.5V AND ±1.35V RL = 100kΩ CL = 20pF 10k 100k 0.1 –10 –20 1k 0.01 0.1 LOAD CURRENT (mA) 1 10 FREQUENCY (Hz) Figure 11. AD8538 Output Saturation Voltage vs. Load Current 35 Figure 14. AD8538 Open-Loop Gain and Phase vs. Frequency 120 VSY = 5V RL = 10kΩ VSY – VOH VSY = 5V AND 2.7V TA = 25°C OUTPUT SATURATION VOLTAGE (mV) 30 25 20 VOL 15 10 5 0 –40 100 80 CMRR (dB) 60 40 20 06741-010 06741-013 –25 –10 5 20 35 50 65 80 95 110 125 0 100 1k 10k FREQUENCY (Hz) 100k 1M TEMPERATURE (°C) Figure 12. AD8538 Output Saturation Voltage vs. Temperature 60 Figure 15. AD8538 CMRR vs. Frequency 100 VSY = ±2.5V AND ±1.35V TA = 25°C VSY = 5V AND 2.7V CL = 20pF RL = 2kΩ AV = 100 80 +PSRR CLOSED-LOOP GAIN (dB) 40 20 AV = 10 PSRR (dB) 60 –PSRR 40 0 AV = 1 20 06741-011 06741-014 –20 1k 10k 100k 1M 0 100 1k 10k FREQUENCY (Hz) 100k 1M FREQUENCY (Hz) Figure 13. AD8538 Closed-Loop Gain vs. Frequency Figure 16. AD8538 PSRR vs. Frequency Rev. A | Page 9 of 24 06741-012 0.01 0.001 –45 1M OPEN-LOOP PHASE SHIFT (Degrees) AD8538/AD8539 1000 VSY = 5V AND 2.7V AV = 100 VOLTAGE (1V/DIV) VSY = 5V AV = 1 CL = 300pF RL = 10kΩ 100 OUTPUT IMPEDANCE (Ω) 10 AV = 10 1 AV = 1 0.1 06741-022 0.01 100 1k 10k FREQUENCY (Hz) 100k 1M TIME (4µs/DIV) Figure 17. AD8538 Closed-Loop Output Impedance vs. Frequency 60 Figure 20. AD8538 Large Signal Transient Response VSY = 5V AV = –50 SMALL SIGNAL OVERSHOOT (%) 50 40 VIN (mV) VSY = 5V TA = 25°C RL = 2kΩ 100 0 30 OS+ 0 06741-015 –2.5 TIME (10µs/DIV) 0 1 10 100 1000 LOAD CAPACITANCE (pF) Figure 18. AD8538 Small Signal Overshoot vs. Load Capacitance VSY = 5V AND 2.7V AV = 1 CL = 300pF RL = 2kΩ Figure 21. AD8538 Positive Overload Recovery VSY = 5V AV = –50 0 VIN (mV) VOLTAGE (50mV/DIV) –100 2.5 VOUT (V) 06741-016 TIME (4µs/DIV) TIME (10µs/DIV) Figure 19. AD8538 Small Signal Transient Response Figure 22. AD8538 Negative Overload Recovery Rev. A | Page 10 of 24 06741-019 0 06741-018 10 OS– VOUT (V) 20 06741-017 AD8538/AD8539 1000 VSY = 5V TA = 25°C VIN VOLTAGE NOISE DENSITY (nV/√Hz) VOLTAGE (1V/DIV) VOUT 100 10 10 100 1k FREQUENCY (Hz) 10k 06741-021 TIME (200µs/DIV) Figure 23. AD8538 Voltage Noise Density VSY = 5V AND 2.7V Figure 25. AD8538 No Phase Reversal VOLTAGE (500nV/DIV) TIME (1s/DIV) Figure 24. AD8538 0.1 Hz to 10 Hz Input Voltage Noise 06741-020 Rev. A | Page 11 of 24 06741-023 VSY = 5V AV = 1 VIN = 6V p-p RL = 10kΩ AD8538/AD8539 VSY = 2.7 V or ±1.35 V, AD8538 only, unless otherwise noted. 180 160 140 VSY = 2.7V 0V < VCM < 2.7V TA = 25°C 10000 OUTPUT SATURATION VOLTAGE (mV) VSY = 2.7V TA = 25°C 1000 NUMBER OF AMPLIFIERS 120 100 80 60 40 06741-024 100 10 SOURCE 1 SINK 06741-027 20 0 –10.0 –8.4 –6.8 –5.2 –3.6 –2.0 –0.4 1.2 2.8 4.4 6.0 7.6 9.2 INPUT OFFSET VOLTAGE (µV) 0.1 0.001 0.01 0.1 1 LOAD CURRENT (mA) Figure 26. AD8538 Input Offset Voltage Distribution 35 30 Figure 29. AD8538 Output Saturation Voltage vs. Load Current 30 VSY = 2.7V RL = 10kΩ OUTPUT SATURATION VOLTAGE (mV) VSY = 2.7V –40°C < TA < +125°C 25 VSY = VOH 20 NUMBER OF AMPLIFIERS 25 20 15 10 5 0 15 VOL 10 5 06741-028 06741-025 0 0.012 0.024 0.036 0.048 0.060 0.072 0.084 0.096 TCVOS (µV/°C) 0 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) Figure 27. AD8538 Input Offset Voltage Drift Distribution 10 VSY = 2.7V 8 TA = 25°C 6 4 2 0 –2 –4 –6 –8 –10 0 0.5 1.0 1.5 2.0 2.5 06741-026 Figure 30. AD8538 Output Saturation Voltage vs. Temperature 80 VSY = 2.7V TA = 25°C 70 RL = 2kΩ 60 50 40 30 20 10 0 OS+ OS– 1 10 100 06741-029 SMALL SIGNAL OVERSHOOT (%) INPUT OFFSET VOLTAGE (µV) 1000 INPUT COMMON-MODE VOLTAGE (V) LOAD CAPACITANCE (pF) Figure 28. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage Figure 31. AD8538 Small Signal Overshoot vs. Load Capacitance Rev. A | Page 12 of 24 AD8538/AD8539 VSY = 2.7V AV = 1 CL = 100pF RL = 10kΩ 1000 VSY = 2.7V TA = 25°C VOLTAGE NOISE DENSITY (nV/√Hz) 06741-030 VOLTAGE (500mV/DIV) 100 TIME (4µs/DIV) 10 10 100 1k FREQUENCY (Hz) 10k 100k Figure 32. AD8538 Large Signal Transient Response Figure 33. AD8538 Voltage Noise Density Rev. A | Page 13 of 24 06741-032 AD8538/AD8539 AD8539 CHARACTERISTICS AD8539 only, VS = 5 V or ±2.5 V, unless otherwise noted. 800 700 NUMBER OF AMPLIFIERS 500 400 300 200 100 0 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 VOS (µV) INPUT BIAS CURRENT (pA) 600 AD8539 VSY = 5V 0 < VCM < 5V TA = 25°C 1000.0 AD8539 VSY = 5V 100.0 10.0 1.0 0.1 5 25 45 65 85 TEMPERATURE (°C) 105 125 Figure 34. AD8539 Input Offset Voltage Distribution 60 AD8539 VSY = ±2.5V –40°C < VCM < 125°C 400 350 300 40 ISY (µA) 250 200 150 100 10 50 06741-036 Figure 37. AD8539 Input Bias Current vs. Temperature 50 AD8539 VSY = 0V TO 5V –40°C < TA < +125°C +125°C +85°C +25°C –40°C NUMBER OF AMPLIFIERS 30 20 0 0.016 0.032 0.048 0.064 TCVOS (µV) 0.080 0.096 0 0.5 1.0 1.5 2.0 2.5 VSY (V) 3.0 3.5 4.0 4.5 5.0 Figure 35. AD8539 Input Offset Voltage Drift Distribution 20 AD8539 VSY = 5V 0V < VCM < 5V TA = 25°C Figure 38. AD8539 Supply Current vs. Supply Voltage 400 AD8539 375 350 325 10 VOS (µV) 0 ISY (µA) VSY = ±2.5V 300 275 VSY = ±1.35V –10 250 225 06741-037 06741-040 –20 0 1 2 VCM (V) 3 4 5 200 –40 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 Figure 36. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage Figure 39. AD8539 Supply Current vs. Temperature Rev. A | Page 14 of 24 06741-039 0 0 06741-038 06741-035 0.01 AD8538/AD8539 10000 OUTPUT SATURATION VOLTAGE (mV) AD8539 120 SOURCE, VS = ± 2.5V SINK, VS = ± 1.35V 120 100 80 60 PHASE (Degrees) 06741-046 06741-045 06741-044 100 80 60 GAIN (Degrees) 1000 40 20 0 –20 –40 –60 AD8539 VSY = ±2.5V RL = 2kΩ CL = 20pF 10k 100k FREQUENCY (Hz) 1M 40 20 0 –20 –40 –60 –80 100 SOURCE, VS = ± 1.35V SINK, VS = ± 2.5V 10 1 –80 –100 0.01 0.1 1 ILOAD (mA) 10 100 06741-041 –100 –120 10M 0.1 0.001 –120 1k Figure 40. AD8539 Output Saturation Voltage vs. Load Current 35 Figure 43. AD8539 Open-Loop Gain and Phase vs. Frequency 140 OUTPUT SATURATION VOLTAGE (mV) 30 25 20 AD8539 VS = 5V VDD - VOH, IL = 250µA, RL = 10kΩ 120 100 CHANNEL B AD8539 VSY = ±2.5V CHANNEL A CMRR (dB) 06741-042 80 60 40 VOL, IL = 250µA, RL = 10kΩ 15 10 VDD - VOH, IL = 25µA, RL = 100kΩ 5 VOL, IL = 25µA, RL = 100kΩ 0 –40 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 20 0 100 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 41. AD8539 Output Saturation Voltage vs. Temperature 60 AV = 100 40 CLOSED-LOOP GAIN (dB) Figure 44. AD8539 CMRR vs. Frequency 120 AD8539 VSY = ±2.5V RL = 2kΩ CL = 20pF 100 PSRR– 80 PSRR+ 60 40 20 AD8539 VSY = ±2.5V AV = 10 PSRR (dB) 20 AV = 1 0 –20 0 06741-043 –40 100 1k 10k 100k FREQUENCY (Hz) 1M 10M –20 100 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 42. AD8539 Closed-Loop Gain vs. Frequency Figure 45. AD8539 PSRR vs. Frequency Rev. A | Page 15 of 24 AD8538/AD8539 1000 900 800 VOLTAGE (1V/DIV) AD8539 VSY = ±2.5V 700 ZOUT (Ω) AD8539 VSY = 5V AV = 1 CL = 300pF RL = 10kΩ 600 500 400 300 200 100 06741-047 AV = 100 AV = 10 AV = 1 0.01 100 1k 10k 100k FREQUENCY (Hz) 1M 10M TIME (4µs/DIV) Figure 46. AD8539 Closed-Loop Output Impedance vs. Frequency 60 AD8539 VSY = ±2.5V RL = 2kΩ INPUT VOLTAGE (50mV/DIV) 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 Figure 49. AD8539 Large Signal Transient Response 5 AD8539 VSY = ±2.5V AV = –50 INPUT VOLTAGE 4 3 2 1 0 –1 OUTPUT VOLTAGE –0.20 –2 –3 06741-051 50 06741-050 OVERSHOOT (%) 40 30 OS+ 20 OS– 10 1 10 100 CAPACITANCE (pF) 1k 06741-048 0 –0.25 TIME (20µs/DIV) Figure 47. AD8539 Small Signal Overshoot vs. Load Capacitance 0.05 0 Figure 50. AD8539 Positive Overload Recovery 7.5 6.5 AD8539 VSY = ±2.5V AV = –50 5.5 4.5 3.5 2.5 1.5 OUTPUT VOLTAGE –0.30 0.5 –0.5 06741-052 INPUT VOLTAGE (50mV/DIV) VOLTAGE (50mV/DIV) –0.05 –0.10 –0.15 –0.20 –0.25 06741-049 TIME (2µs/DIV) –0.35 TIME (20µs/DIV) Figure 48. AD8539 Small Signal Transient Response Figure 51. AD8539 Negative Overload Recovery Rev. A | Page 16 of 24 OUTPUT VOLTAGE (5V/DIV) AD8539 VSY = 5V AV = 1 CL = 300pF RL = 2kΩ INPUT VOLTAGE OUTPUT VOLTAGE (1V/DIV) AD8538/AD8539 1k AD8539 VSY = ±2.5V INPUT VOLTAGE VOLTAGE (2V/DIV) VOLTAGE NOISE DENSITY (nV Hz) AD8539 VSY = ±2.5V AV = 1 RL = 10kΩ 100 OUTPUT VOLTAGE 06741-053 10 100 1k 10k FREQUENCY (Hz) 100k TIME (200µs/DIV) Figure 52. AD8539 Voltage Noise Density 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 06741-054 Figure 54. AD8539 No Phase Reversal 0 AD8539 VSY = 5V AV = 1M –20 AD8539 VSY = ±2.5V CHANNEL SEPARATION (dB) VOLTAGE (200mV/DIV) –40 –60 –80 –100 –120 –140 06741-056 –0.8 –5 –4 –3 –2 –1 0 1 TIME (1s/DIV) 2 3 4 5 –160 100 1k 10k FREQUENCY (Hz) 100k Figure 53. AD8539 0.1 Hz to 10 Hz Input Voltage Noise Figure 55. AD8539 Channel Separation vs. Frequency Rev. A | Page 17 of 24 06741-055 AD8538/AD8539 VS = 2.7 V or ±1.35 V, TA = 25°C, AD8539 only, unless otherwise noted. 350 300 AD8539 VSY = 2.7V 0V < VCM < 2.7V TA = 25°C 35 OUTPUT SATURATION VOLTAGE (mV) 30 25 VDD – VOH, RL = 10kΩ 20 15 10 VDD – VOH, RL = 100kΩ 5 VOL, RL = 10kΩ AD8539 VSY = 2.7V NUMBER OF AMPLIFIERS 250 200 150 100 50 0 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 VOS VOL, RL = 100kΩ –25 –10 5 20 35 50 65 80 TEMPERATURE (°C) 95 110 125 06741-060 Figure 56. AD8539 Input Offset Voltage Distribution 45 40 35 AD8539 VSY = ±1.35V –40°C < TA < +125°C 06741-057 0 –40 Figure 59. AD8539 Output Saturation Voltage vs. Temperature 80 70 60 AD8539 VSY = ±1.35V RL = 2kΩ NUMBER OF AMPLIFIERS OVERSHOOT (%) 30 25 20 15 10 5 06741-058 50 40 OS+ 30 20 OS– 10 06741-061 0 0 0.016 0.032 0.048 0.064 TCVOS (µV) 0.080 0.096 0 1 10 100 CAPACITANCE (pF) 1k Figure 57. AD8539 Input Offset Voltage Drift Distribution 20 15 10 5 VOS (µV) Figure 60. AD8539 Small Signal Overshoot vs. Load Capacitance AD8539 VSY = ±1.35V AV = 1 CL = 300pF RL = 10kΩ 0 –5 –10 –15 06741-059 VOLTAGE (500mV/DIV) AD8539 VSY = 2.7V 0V < VCM < 2.7V TA = 25°C –20 0 0.3 0.6 0.9 1.2 1.5 VCM (V) 1.8 2.1 2.4 2.7 TIME (4µs/DIV) Figure 58. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage Figure 61. AD8539 Large Signal Transient Response Rev. A | Page 18 of 24 06741-062 AD8538/AD8539 1k AD8539 VSY = ±1.35V 0 –20 AD8539 VSY = ±1.35V VOLTAGE NOISE DENSITY (nV/ Hz) CHANNEL SEPARATION (dB) 06741-063 –40 –60 –80 –100 –120 –140 06741-064 100 10 100 1k 10k FREQUENCY (Hz) 100k –160 100 1k 10k FREQUENCY (Hz) 100k Figure 62. AD8539 Voltage Noise Density Figure 63. AD8539 Channel Separation vs. Frequency Rev. A | Page 19 of 24 AD8538/AD8539 OUTLINE DIMENSIONS 2.90 BSC 5 4 1.60 BSC 1 2 3 2.80 BSC PIN 1 0.95 BSC *0.90 0.87 0.84 1.90 BSC *1.00 MAX 0.20 0.08 8° 4° 0° 0.60 0.45 0.30 0.10 MAX 0.50 0.30 SEATING PLANE *COMPLIANT TO JEDEC STANDARDS MO-193-AB WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS. Figure 64. 5-Lead Thin Small Outline Transistor Package [TSOT-23] (UJ-5) Dimensions shown in millimeters 5.00 (0.1968) 4.80 (0.1890) 4.00 (0.1574) 3.80 (0.1497) 8 1 5 4 6.20 (0.2441) 5.80 (0.2284) 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE 1.75 (0.0688) 1.35 (0.0532) 0.50 (0.0196) 0.25 (0.0099) 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 45° 0.51 (0.0201) 0.31 (0.0122) COMPLIANT TO JEDEC STANDARDS MS-012-A A CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 65. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) Rev. A | Page 20 of 24 012407-A AD8538/AD8539 3.20 3.00 2.80 3.20 3.00 2.80 PIN 1 8 5 1 5.15 4.90 4.65 4 0.65 BSC 0.95 0.85 0.75 0.15 0.00 0.38 0.22 SEATING PLANE 1.10 MAX 8° 0° 0.80 0.60 0.40 0.23 0.08 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 66. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters ORDERING GUIDE Model AD8538AUJZ-R2 1 AD8538AUJZ-REEL1 AD8538AUJZ-REEL71 AD8538ARZ1 AD8538ARZ-REEL1 AD8538ARZ-REEL71 AD8539ARMZ-R21 AD8539ARMZ-REEL1 AD8539ARZ1 AD8539ARZ-REEL1 AD8539ARZ-REEL71 1 Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C Package Description 5-Lead TSOT-23 5-Lead TSOT-23 5-Lead TSOT-23 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead MSOP 8-Lead MSOP 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N Package Option UJ-5 UJ-5 UJ-5 R-8 R-8 R-8 RM-8 RM-8 R-8 R-8 R-8 Branding A0C A0C A0C A1S A1S Z = RoHS Compliant Part. Rev. A | Page 21 of 24 AD8538/AD8539 NOTES Rev. A | Page 22 of 24 AD8538/AD8539 NOTES Rev. A | Page 23 of 24 AD8538/AD8539 NOTES ©2005–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06741-0-5/07(A) Rev. A | Page 24 of 24