Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier AD8628/AD8629/AD8630 OUT 1 V- 2 AD8628 5 V+ 4 -IN TOP VIEW (Not to Scale) +IN 3 Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RJ-5) NC 1 -IN 2 AD8628 8 NC 7 V+ 6 OUT TOP VIEW V- 4 (Not to Scale) 5 NC Automotive sensors Pressure and position sensors Strain gage amplifiers Medical instrumentation Thermocouple amplifiers Precision current sensing Photodiode amplifiers GENERAL DESCRIPTION This amplifier has ultralow offset, drift, and bias current. The AD8628/AD8629/AD8630 are wide bandwidth auto-zero amplifiers featuring rail-to-rail input and output swing and low noise. Operation is fully specified from 2.7 V to 5 V single supply (1.35 V to 2.5 V dual supply). The AD8628/AD8629/AD8630 provide benefits previously found only in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices, Inc., topology, these zerodrift amplifiers combine low cost with high accuracy and low noise. No external capacitor is required. In addition, the AD8628/ AD8629/AD8630 greatly reduce the digital switching noise found in most chopper-stabilized amplifiers. With an offset voltage of only 1 V, drift of less than 0.005 V/C, and noise of only 0.5 V p-p (0 Hz to 10 Hz), the AD8628/ AD8629/AD8630 are suited for applications where error sources cannot be tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many systems can take advantage of the rail-to-rail input and output swings provided by the AD8628/AD8629/AD8630 to reduce input biasing complexity and maximize SNR. 02735-002 +IN 3 NC = NO CONNECT APPLICATIONS 02735-001 PIN CONFIGURATIONS Figure 2. 8-Lead SOIC_N (R-8) OUT A 1 -IN A 2 8 AD8629 V+ OUT B TOP VIEW 6 -IN B (Not to Scale) V- 4 5 +IN B 7 +IN A 3 02735-063 Lowest auto-zero amplifier noise Low offset voltage: 1 V Input offset drift: 0.002 V/C Rail-to-rail input and output swing 5 V single-supply operation High gain, CMRR, and PSRR: 130 dB Very low input bias current: 100 pA maximum Low supply current: 1.0 mA Overload recovery time: 50 s No external components required Qualified for automotive applications Figure 3. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8) 14 OUT D OUT A 1 -IN A 2 +IN A 3 13 -IN D AD8630 12 +IN D TOP VIEW 11 V- (Not to Scale) 10 +IN C +IN B 5 V+ 4 -IN B 6 9 -IN C OUT B 7 8 OUT C 02735-066 FEATURES Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14) The AD8628/AD8629/AD8630 are specified for the extended industrial temperature range (-40C to +125C). The AD8628 is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead narrow SOIC plastic packages. The AD8629 is available in the standard 8-lead narrow SOIC and MSOP plastic packages. The AD8630 quad amplifier is available in 14-lead narrow SOIC and 14-lead TSSOP plastic packages. See the Ordering Guide for automotive grades. Rev. I 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 (c)2002-2011 Analog Devices, Inc. All rights reserved. AD8628/AD8629/AD8630 TABLE OF CONTENTS Features .............................................................................................. 1 1/f Noise....................................................................................... 14 Applications....................................................................................... 1 Peak-to-Peak Noise .................................................................... 15 General Description ......................................................................... 1 Noise Behavior with First-Order, Low-Pass Filter ................. 15 Pin Configurations ........................................................................... 1 Total Integrated Input-Referred Noise for First-Order Filter15 Revision History ............................................................................... 2 Input Overvoltage Protection ................................................... 16 Specifications..................................................................................... 3 Output Phase Reversal............................................................... 16 Electrical Characteristics--VS = 5.0 V....................................... 3 Overload Recovery Time .......................................................... 16 Electrical Characteristics--VS = 2.7 V....................................... 4 Infrared Sensors.......................................................................... 17 Absolute Maximum Ratings............................................................ 5 Precision Current Shunt Sensor ............................................... 18 Thermal Characteristics .............................................................. 5 Output Amplifier for High Precision DACs........................... 18 ESD Caution.................................................................................. 5 Outline Dimensions ....................................................................... 19 Typical Performance Characteristics ............................................. 6 Ordering Guide .......................................................................... 21 Functional Description .................................................................. 14 REVISION HISTORY 4/11--Rev. H to Rev. I Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 21 4/10--Rev. G to Rev. H Change to Features List.................................................................... 1 Change to General Description Section ........................................ 1 Changes to Table 3............................................................................ 5 Updated Outline Dimensions Section ......................................... 19 Changes to Ordering Guide .......................................................... 21 6/08--Rev. F to Rev. G Changes to Features Section............................................................ 1 Changes to Table 5 and Figure 42 Caption ................................. 12 Changes to 1/f Noise Section and Figure 49 ............................... 14 Changes to Figure 51 Caption and Figure 55 ............................. 15 Changes to Figure 57 Caption and Figure 58 Caption .............. 16 Changes to Figure 60 Caption and Figure 61 Caption .............. 17 Changes to Figure 64...................................................................... 18 2/08--Rev. E to Rev. F Renamed TSOT-23 to TSOT ............................................Universal Deleted Figure 4 and Figure 6......................................................... 1 Changes to Figure 3 and Figure 4 Captions .................................. 1 Changes to Table 1............................................................................ 3 Changes to Table 2............................................................................ 4 Changes to Table 4............................................................................ 5 Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 20 5/05--Rev. D to Rev. E Changes to Ordering Guide .......................................................... 22 1/05--Rev. C to Rev. D Added AD8630 ...................................................................Universal Added Figure 5 and Figure 6............................................................1 Changes to Caption in Figure 8 and Figure 9 ................................7 Changes to Caption in Figure 14.....................................................8 Changes to Figure 17.........................................................................8 Changes to Figure 23 and Figure 24................................................9 Changes to Figure 25 and Figure 26............................................. 10 Changes to Figure 31...................................................................... 11 Changes to Figure 40, Figure 41, Figure 42................................. 12 Changes to Figure 43 and Figure 44............................................. 13 Changes to Figure 51...................................................................... 15 Updated Outline Dimensions....................................................... 20 Changes to Ordering Guide .......................................................... 20 10/04--Rev. B to Rev. C Updated Formatting...........................................................Universal Added AD8629 ...................................................................Universal Added SOIC and MSOP Pin Configurations ................................1 Added Figure 48 ............................................................................. 13 Changes to Figure 62...................................................................... 17 Added MSOP Package ................................................................... 19 Changes to Ordering Guide .......................................................... 22 10/03--Rev. A to Rev. B Changes to General Description .....................................................1 Changes to Absolute Maximum Ratings........................................4 Changes to Ordering Guide .............................................................4 Added TSOT-23 Package .............................................................. 15 6/03--Rev. 0 to Rev. A Changes to Specifications.................................................................3 Changes to Ordering Guide .............................................................4 Change to Functional Description............................................... 10 Updated Outline Dimensions....................................................... 15 10/02--Revision 0: Initial Version Rev. I | Page 2 of 24 AD8628/AD8629/AD8630 SPECIFICATIONS ELECTRICAL CHARACTERISTICS--VS = 5.0 V VS = 5.0 V, VCM = 2.5 V, TA = 25C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions Min VOS Typ Max Unit 1 5 10 V V 30 100 100 300 1.5 200 250 5 pA pA nA pA pA V dB dB dB dB V/C -40C TA +125C Input Bias Current AD8628/AD8629 AD8630 IB Input Offset Current IOS -40C TA +125C 50 -40C TA +125C Input Voltage Range Common-Mode Rejection Ratio CMRR Large Signal Voltage Gain AVO Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High VOS/T VOH Output Voltage Low VOL Short-Circuit Limit ISC VCM = 0 V to 5 V -40C TA +125C RL = 10 k, VO = 0.3 V to 4.7 V -40C TA +125C -40C TA +125C RL = 100 k to ground -40C TA +125C RL = 10 k to ground -40C TA +125C RL = 100 k to V+ -40C TA +125C RL = 10 k to V+ -40C TA +125C 0 120 115 125 120 4.99 4.99 4.95 4.95 25 -40C TA +125C Output Current IO -40C TA +125C POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier INPUT CAPACITANCE Differential Common Mode DYNAMIC PERFORMANCE Slew Rate Overload Recovery Time Gain Bandwidth Product NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density PSRR ISY VS = 2.7 V to 5.5 V, -40C TA +125C VO = VS/2 -40C TA +125C 115 140 130 145 135 0.002 4.996 4.995 4.98 4.97 1 2 10 15 50 40 30 15 130 0.85 1.0 0.02 5 5 20 20 1.1 1.2 V V V V mV mV mV mV mA mA mA mA dB mA mA CIN SR 1.5 8.0 pF pF RL = 10 k 1.0 0.05 2.5 V/s ms MHz 0.1 Hz to 10 Hz 0.1 Hz to 1.0 Hz f = 1 kHz f = 10 Hz 0.5 0.16 22 5 V p-p V p-p nV/Hz fA/Hz GBP en p-p en in Rev. I | Page 3 of 24 AD8628/AD8629/AD8630 ELECTRICAL CHARACTERISTICS--VS = 2.7 V VS = 2.7 V, VCM = 1.35 V, VO = 1.4 V, TA = 25C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions Min VOS Typ Max Unit 1 5 10 V V 30 100 1.0 50 100 300 1.5 200 250 2.7 pA pA nA pA pA V dB dB dB dB V/C -40C TA +125C Input Bias Current AD8628/AD8629 AD8630 IB Input Offset Current IOS -40C TA +125C -40C TA +125C Input Voltage Range Common-Mode Rejection Ratio CMRR Large Signal Voltage Gain AVO Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High VOS/T VOH Output Voltage Low VOL Short-Circuit Limit ISC VCM = 0 V to 2.7 V -40C TA +125C RL = 10 k, VO = 0.3 V to 2.4 V -40C TA +125C -40C TA +125C RL = 100 k to ground -40C TA +125C RL = 10 k to ground -40C TA +125C RL = 100 k to V+ -40C TA +125C RL = 10 k to V+ -40C TA +125C 0 115 110 110 105 2.68 2.68 2.67 2.67 10 -40C TA +125C Output Current IO -40C TA +125C POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier INPUT CAPACITANCE Differential Common Mode DYNAMIC PERFORMANCE Slew Rate Overload Recovery Time Gain Bandwidth Product NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density PSRR ISY VS = 2.7 V to 5.5 V, -40C TA +125C VO = VS/2 -40C TA +125C 115 130 120 140 130 0.002 2.695 2.695 2.68 2.675 1 2 10 15 15 10 10 5 130 0.75 0.9 0.02 5 5 20 20 1.0 1.2 V V V V mV mV mV mV mA mA mA mA dB mA mA CIN SR 1.5 8.0 pF pF RL = 10 k 1 0.05 2 V/s ms MHz 0.1 Hz to 10 Hz f = 1 kHz f = 10 Hz 0.5 22 5 V p-p nV/Hz fA/Hz GBP en p-p en in Rev. I | Page 4 of 24 AD8628/AD8629/AD8630 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage 1 Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) ESD AD8628 HBM 8-Lead SOIC FICDM 8-Lead SOIC FICDM 5-Lead TSOT MM 8-Lead SOIC ESD AD8629 HBM 8-Lead SOIC FICDM 8-Lead SOIC ESD AD8630 HBM 14-Lead SOIC FICDM 14-Lead SOIC FICDM 14-Lead TSSOP MM 14-Lead SOIC 1 Rating 6V GND - 0.3 V to VS + 0.3 V 5.0 V Indefinite -65C to +150C -40C to +125C -65C to +150C 300C 7000V 1500V 1000V 200V THERMAL CHARACTERISTICS JA is specified for worst-case conditions, that is, JA is specified for the device soldered in a circuit board for surface-mount packages. This was measured using a standard two-layer board. Table 4. Package Type 5-Lead TSOT (UJ-5) 5-Lead SOT-23 (RJ-5) 8-Lead SOIC_N (R-8) 8-Lead MSOP (RM-8) 14-Lead SOIC_N (R-14) 14-Lead TSSOP (RU-14) ESD CAUTION 4000V 1000V 5000V 1500V 1500V 200V Differential input voltage is limited to 5 V or the supply voltage, whichever is less. 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. Rev. I | Page 5 of 24 JA 207 230 158 190 105 148 JC 61 146 43 44 43 23 Unit C/W C/W C/W C/W C/W C/W AD8628/AD8629/AD8630 TYPICAL PERFORMANCE CHARACTERISTICS 100 VS = 2.7V TA = 25C VS = 5V VCM = 2.5V TA = 25C 90 80 NUMBER OF AMPLIFIERS 140 120 100 80 60 70 60 50 40 30 40 20 20 10 0 -2.5 -1.5 -0.5 0.5 INPUT OFFSET VOLTAGE (V) 1.5 2.5 0 -2.5 02735-003 -1.5 Figure 5. Input Offset Voltage Distribution +85C NUMBER OF AMPLIFIERS 30 +25C 1 2 3 4 5 INPUT COMMON-MODE VOLTAGE (V) 4 3 2 1 -40C 0 5 6 0 0 2 8 10 1 10 Figure 9. Input Offset Voltage Drift Figure 6. AD8628 Input Bias Current vs. Input Common-Mode Voltage 1k 1500 VS = 5V 4 6 TCVOS (nV/C) 02735-007 10 02735-004 INPUT BIAS CURRENT (pA) 40 20 VS = 5V TA = -40C TO +125C 6 50 150C 1000 VS = 5V TA = 25C 100 125C OUTPUT VOLTAGE (mV) INPUT BIAS CURRENT (pA) 2.5 7 VS = 5V 500 0 -500 10 SOURCE SINK 1 0.1 -1000 0 1 2 3 4 5 INPUT COMMON-MODE VOLTAGE (V) 6 0.01 0.0001 02735-005 -1500 1.5 Figure 8. Input Offset Voltage Distribution 60 0 -0.5 0.5 INPUT OFFSET VOLTAGE (V) Figure 7. AD8628 Input Bias Current vs. Input Common-Mode Voltage 0.001 0.01 0.1 LOAD CURRENT (mA) Figure 10. Output Voltage to Supply Rail vs. Load Current Rev. I | Page 6 of 24 02735-008 NUMBER OF AMPLIFIERS 160 02735-006 180 AD8628/AD8629/AD8630 1k 1000 TA = 25C VS = 2.7V 800 SUPPLY CURRENT (A) 10 SOURCE SINK 1 0.1 600 400 0.001 0.01 0.1 LOAD CURRENT (mA) 1 10 0 02735-009 0.01 0.0001 Figure 11. Output Voltage to Supply Rail vs. Load Current 0 1 2 3 4 SUPPLY VOLTAGE (V) VS = 5V VCM = 2.5V TA = -40C TO +150C VS = 2.7V CL = 20pF RL = M = 45 60 OPEN-LOOP GAIN (dB) INPUT BIAS CURRENT (pA) 6 Figure 14. Supply Current vs. Supply Voltage 1500 1150 5 02735-012 200 900 450 GAIN 40 0 45 20 PHASE 90 135 0 180 PHASE SHIFT (Degrees) OUTPUT VOLTAGE (mV) 100 225 100 0 25 50 75 100 TEMPERATURE (C) 125 150 175 10k 100k 1M FREQUENCY (Hz) 10M Figure 15. Open-Loop Gain and Phase vs. Frequency Figure 12. AD8628 Input Bias Current vs. Temperature 1250 70 VS = 5V CL = 20pF RL = M = 52.1 60 5V 1000 OPEN-LOOP GAIN (dB) 50 2.7V 750 500 250 GAIN 0 40 45 30 PHASE 20 90 10 135 0 180 -10 225 PHASE SHIFT (Degrees) TA = 25 C 0 50 100 TEMPERATURE (C) 150 200 -30 10k 100k 1M FREQUENCY (Hz) 10M Figure 16. Open-Loop Gain and Phase vs. Frequency Figure 13. Supply Current vs. Temperature Rev. I | Page 7 of 24 02735-014 -20 0 -50 02735-011 SUPPLY CURRENT (A) 02735-013 -25 02735-010 -20 0 -50 AD8628/AD8629/AD8630 70 300 VS = 2.7V CL = 20pF RL = 2k 240 30 OUTPUT IMPEDANCE () AV = 100 40 AV = 10 20 10 AV = 1 0 210 180 150 120 90 -10 60 -20 30 -30 1k 10k 100k 1M FREQUENCY (Hz) 10M 0 100 02735-015 CLOSED-LOOP GAIN (dB) 50 VS = 5V 270 Figure 17. Closed-Loop Gain vs. Frequency AV = 10 AV = 100 AV = 1 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M Figure 20. Output Impedance vs. Frequency 70 VS = 5V CL = 20pF RL = 2k 60 AV = 100 40 30 VOLTAGE (500mV/DIV) CLOSED-LOOP GAIN (dB) 50 AV = 10 20 10 AV = 1 0 0V VS = 1.35V CL = 300pF RL = AV = 1 -10 10k 100k 1M FREQUENCY (Hz) 10M TIME (4s/DIV) 02735-019 -30 1k 02735-016 -20 Figure 21. Large Signal Transient Response Figure 18. Closed-Loop Gain vs. Frequency 300 270 VS = 2.7V VOLTAGE (1V/DIV) 210 180 150 120 0V VS = 2.5V CL = 300pF RL = AV = 1 90 AV = 100 30 0 100 AV = 10 AV = 1 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M TIME (5s/DIV) Figure 22. Large Signal Transient Response Figure 19. Output Impedance vs. Frequency Rev. I | Page 8 of 24 02735-020 60 02735-017 OUTPUT IMPEDANCE () 240 02735-018 60 AD8628/AD8629/AD8630 80 VS = 2.5V RL = 2k TA = 25C 70 60 OVERSHOOT (%) VOLTAGE (50mV/DIV) VS = 1.35V CL = 50pF RL = AV = 1 0V 50 40 30 OS- 20 OS+ TIME (4s/DIV) 0 1k 10 100 CAPACITIVE LOAD (pF) Figure 26. Small Signal Overshoot vs. Load Capacitance Figure 23. Small Signal Transient Response VS = 2.5V CL = 50pF RL = AV = 1 VS = 2.5V AV = -50 RL = 10k CL = 0pF CH1 = 50mV/DIV CH2 = 1V/DIV VIN VOLTAGE (V) VOLTAGE (50mV/DIV) 1 02735-024 02735-021 10 0V 0V 0V TIME (4s/DIV) 02735-025 02735-022 VOUT TIME (2s/DIV) Figure 24. Small Signal Transient Response Figure 27. Positive Overvoltage Recovery 100 VS = 1.35V RL = 2k TA = 25C 90 0V VS = 2.5V AV = -50 RL = 10k CL = 0pF CH1 = 50mV/DIV CH2 = 1V/DIV 80 VOLTAGE (V) 60 OS- 50 40 VIN VOUT OS+ 30 20 0 1 10 100 CAPACITIVE LOAD (pF) 1k TIME (10s/DIV) Figure 25. Small Signal Overshoot vs. Load Capacitance Figure 28. Negative Overvoltage Recovery Rev. I | Page 9 of 24 02735-026 0V 10 02735-023 OVERSHOOT (%) 70 AD8628/AD8629/AD8630 140 VS = 1.35V 120 100 80 PSRR (dB) VOLTAGE (1V/DIV) VS = 2.5V VIN = 1kHz @ 3V p-p CL = 0pF RL = 10k AV = 1 0V 60 +PSRR 40 20 -PSRR 0 -20 TIME (200s/DIV) -60 100 140 100 80 80 60 60 10M 1M 10M VS = 2.5V 40 20 0 -20 -20 -40 -40 10k 100k FREQUENCY (Hz) 1M 10M -PSRR 20 0 1k +PSRR 40 -60 100 Figure 30. CMRR vs. Frequency 1k 10k 100k FREQUENCY (Hz) Figure 33. PSRR vs. Frequency 3.0 VS = 5V VS = 2.7V RL = 10k TA = 25C AV = 1 120 2.5 OUTPUT SWING (V p-p) 100 80 60 40 20 0 -20 2.0 1.5 1.0 0.5 -60 100 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 31. CMRR vs. Frequency 0 100 1k 10k FREQUENCY (Hz) 100k Figure 34. Maximum Output Swing vs. Frequency Rev. I | Page 10 of 24 1M 02735-032 -40 02735-029 CMRR (dB) 02735-031 PSRR (dB) 100 140 1M 120 02735-028 CMRR (dB) 140 VS = 2.7V -60 100 10k 100k FREQUENCY (Hz) Figure 32. PSRR vs. Frequency Figure 29. No Phase Reversal 120 1k 02735-030 02735-027 -40 AD8628/AD8629/AD8630 VOLTAGE NOISE DENSITY (nV/Hz) 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 1k 10k FREQUENCY (Hz) 100k 1M 90 75 60 45 30 15 0 02735-033 0 100 Figure 35. Maximum Output Swing vs. Frequency VS = 2.7V NOISE AT 1kHz = 21.3nV 105 0 0.30 VOLTAGE (V) 2.5 0.15 0 -0.15 -0.30 0 1 2 3 4 5 6 TIME (s) 7 8 9 10 90 75 60 45 30 15 0 02735-034 -0.45 Figure 36. 0.1 Hz to 10 Hz Noise VS = 2.7V NOISE AT 10kHz = 42.4nV 105 0 5 10 15 FREQUENCY (kHz) 25 02735-037 VOLTAGE NOISE DENSITY (nV/Hz) 0.45 2.5 20 Figure 39. Voltage Noise Density at 2.7 V from 0 Hz to 25 kHz 0.60 120 VS = 5V VOLTAGE NOISE DENSITY (nV/Hz) 0.45 0.30 0.15 0 -0.15 -0.30 -0.45 0 1 2 3 4 5 6 TIME (s) 7 8 9 10 02735-035 VOLTAGE (V) 2.0 120 VS = 2.7V -0.60 1.0 1.5 FREQUENCY (kHz) Figure 38. Voltage Noise Density at 2.7 V from 0 Hz to 2.5 kHz 0.60 -0.60 0.5 02735-038 OUTPUT SWING (V p-p) 120 VS = 5V RL = 10k TA = 25C AV = 1 5.0 02735-036 5.5 Figure 37. 0.1 Hz to 10 Hz Noise VS = 5V NOISE AT 1kHz = 22.1nV 105 90 75 60 45 30 15 0 0 0.5 1.0 1.5 FREQUENCY (kHz) 2.0 Figure 40. Voltage Noise Density at 5 V from 0 Hz to 2.5 kHz Rev. I | Page 11 of 24 AD8628/AD8629/AD8630 150 90 75 60 45 30 15 0 5 10 15 FREQUENCY (kHz) 20 25 ISC- 0 ISC+ -50 0 25 50 75 100 TEMPERATURE (C) 125 150 175 150 105 90 75 60 45 30 0 10 5 FREQUENCY (kHz) 100 ISC- 50 0 -50 ISC+ -100 -50 02735-040 15 VS = 5V TA = -40C TO +150C Figure 42. Voltage Noise Density at 5 V from 0 Hz to 10 kHz -25 0 25 50 75 100 TEMPERATURE (C) 125 150 175 02735-043 OUTPUT SHORT-CIRCUIT CURRENT (mA) VS = 5V 175 Figure 45. Output Short-Circuit Current vs. Temperature 150 1k VS = 5V OUTPUT-TO-RAIL VOLTAGE (mV) 140 130 VS = 2.7V TO 5V TA = -40C TO +125C 120 110 100 90 80 70 VCC - VOH @ 1k 100 VOL - VEE @ 1k VCC - VOH @ 10k 10 VOL - VEE @ 10k VCC - VOH @ 100k 1 VOL - VEE @ 100k 60 50 -50 -25 0 25 50 TEMPERATURE (C) 75 100 125 02735-041 POWER SUPPLY REJECTION (dB) -25 Figure 44. Output Short-Circuit Current vs. Temperature 120 VOLTAGE NOISE DENSITY (nV/Hz) 50 -100 -50 Figure 41. Voltage Noise Density at 5 V from 0 Hz to 25 kHz 0 100 02735-044 0 VS = 2.7V TA = -40C TO +150C 02735-042 105 OUTPUT SHORT-CIRCUIT CURRENT (mA) VS = 5V NOISE AT 10kHz = 36.4nV 02735-039 VOLTAGE NOISE DENSITY (nV/Hz) 120 Figure 43. Power Supply Rejection vs. Temperature 0.1 -50 -25 0 25 50 75 100 TEMPERATURE (C) 125 150 Figure 46. Output-to-Rail Voltage vs. Temperature Rev. I | Page 12 of 24 AD8628/AD8629/AD8630 1k 140 VS = 2.5V 120 CHANNEL SEPARATION (dB) VCC - VOH @ 1k 100 VOL - VEE @ 1k VCC - VOH @ 10k 10 VOL - VEE @ 10k VCC - VOH @ 100k 1 VOL - VEE @ 100k 100 80 60 40 R1 10k +2.5V VIN 28mV p-p + - 20 V+ A V- V- VOUT R2 100 B V+ -25 0 25 50 75 100 TEMPERATURE (C) 125 150 175 Figure 47. Output-to-Rail Voltage vs. Temperature 0 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 48. AD8629/AD8630 Channel Separation vs. Frequency Rev. I | Page 13 of 24 02735-062 -2.5V 0.1 -50 02735-045 OUTPUT-TO-RAIL VOLTAGE (mV) VS = 2.7V AD8628/AD8629/AD8630 FUNCTIONAL DESCRIPTION The AD8628/AD8629/AD8630 are single-supply, ultrahigh precision rail-to-rail input and output operational amplifiers. The typical offset voltage of less than 1 V allows these amplifiers to be easily configured for high gains without risk of excessive output voltage errors. The extremely small temperature drift of 2 nV/C ensures a minimum offset voltage error over their entire temperature range of -40C to +125C, making these amplifiers ideal for a variety of sensitive measurement applications in harsh operating environments. 1/f NOISE The AD8628/AD8629/AD8630 achieve a high degree of precision through a patented combination of auto-zeroing and chopping. This unique topology allows the AD8628/AD8629/AD8630 to maintain their low offset voltage over a wide temperature range and over their operating lifetime. The AD8628/AD8629/AD8630 also optimize the noise and bandwidth over previous generations of auto-zero amplifiers, offering the lowest voltage noise of any auto-zero amplifier by more than 50%. The internal elimination of 1/f noise is accomplished as follows. 1/f noise appears as a slowly varying offset to the AD8628/AD8629/ AD8630 inputs. Auto-zeroing corrects any dc or low frequency offset. Therefore, the 1/f noise component is essentially removed, leaving the AD8628/AD8629/AD8630 free of 1/f noise. 120 Rev. I | Page 14 of 24 COMPETITOR A (89.7nV/Hz) 105 90 75 60 COMPETITOR B (31.1nV/Hz) 45 30 15 0 AD8628 (19.4nV/Hz) 0 2 MK AT 1kHz FOR ALL 3 GRAPHS 4 6 FREQUENCY (kHz) 8 10 Figure 49. Noise Spectral Density of AD8628 vs. Competition 12 02735-046 The AD8628 is among the few auto-zero amplifiers offered in the 5-lead TSOT package. This provides a significant improvement over the ac parameters of the previous auto-zero amplifiers. The AD8628/AD8629/AD8630 have low noise over a relatively wide bandwidth (0 Hz to 10 kHz) and can be used where the highest dc precision is required. In systems with signal bandwidths of from 5 kHz to 10 kHz, the AD8628/AD8629/AD8630 provide true 16-bit accuracy, making them the best choice for very high resolution systems. One advantage that the AD8628/AD8629/AD8630 bring to system applications over competitive auto-zero amplifiers is their very low noise. The comparison shown in Figure 49 indicates an input-referred noise density of 19.4 nV/Hz at 1 kHz for the AD8628, which is much better than the Competitor A and Competitor B. The noise is flat from dc to 1.5 kHz, slowly increasing up to 20 kHz. The lower noise at low frequency is desirable where auto-zero amplifiers are widely used. VOLTAGE NOISE DENSITY (nV/Hz) Previous designs used either auto-zeroing or chopping to add precision to the specifications of an amplifier. Auto-zeroing results in low noise energy at the auto-zeroing frequency, at the expense of higher low frequency noise due to aliasing of wideband noise into the auto-zeroed frequency band. Chopping results in lower low frequency noise at the expense of larger noise energy at the chopping frequency. The AD8628/AD8629/AD8630 family uses both auto-zeroing and chopping in a patented pingpong arrangement to obtain lower low frequency noise together with lower energy at the chopping and auto-zeroing frequencies, maximizing the signal-to-noise ratio for the majority of applications without the need for additional filtering. The relatively high clock frequency of 15 kHz simplifies filter requirements for a wide, useful noise-free bandwidth. 1/f noise, also known as pink noise, is a major contributor to errors in dc-coupled measurements. This 1/f noise error term can be in the range of several V or more, and, when amplified with the closed-loop gain of the circuit, can show up as a large output offset. For example, when an amplifier with a 5 V p-p 1/f noise is configured for a gain of 1000, its output has 5 mV of error due to the 1/f noise. However, the AD8628/AD8629/AD8630 eliminate 1/f noise internally, thereby greatly reducing output errors. AD8628/AD8629/AD8630 50 PEAK-TO-PEAK NOISE 45 Because of the ping-pong action between auto-zeroing and chopping, the peak-to-peak noise of the AD8628/AD8629/ AD8630 is much lower than the competition. Figure 50 and Figure 51 show this comparison. 40 NOISE (dB) 35 en p-p = 0.5V BW = 0.1Hz TO 10Hz 30 25 20 VOLTAGE (0.5V/DIV) 15 10 0 0 10 20 30 40 50 60 70 FREQUENCY (kHz) 80 90 100 02735-050 5 Figure 53. Simulation Transfer Function of the Test Circuit in Figure 52 50 02735-047 45 TIME (1s/DIV) 40 35 NOISE (dB) Figure 50. AD8628 Peak-to-Peak Noise en p-p = 2.3V BW = 0.1Hz TO 10Hz 30 25 20 15 VOLTAGE (0.5V/DIV) 10 0 0 10 20 30 40 50 60 70 FREQUENCY (kHz) 80 90 100 02735-051 5 Figure 54. Actual Transfer Function of the Test Circuit in Figure 52 02735-048 The measured noise spectrum of the test circuit charted in Figure 54 shows that noise between 5 kHz and 45 kHz is successfully rolled off by the first-order filter. TOTAL INTEGRATED INPUT-REFERRED NOISE FOR FIRST-ORDER FILTER Figure 51. Competitor A Peak-to-Peak Noise NOISE BEHAVIOR WITH FIRST-ORDER, LOW-PASS FILTER The AD8628 was simulated as a low-pass filter (see Figure 53) and then configured as shown in Figure 52. The behavior of the AD8628 matches the simulated data. It was verified that noise is rolled off by first-order filtering. Figure 53 and Figure 54 show the difference between the simulated and actual transfer functions of the circuit shown in Figure 52. IN OUT COMPETITOR A AD8551 AD8628 1 470pF 0.1 10 Figure 52. First-Order Low-Pass Filter Test Circuit, x101 Gain and 3 kHz Corner Frequency 100 1k 3dB FILTER BANDWIDTH (Hz) Figure 55. RMS Noise vs. 3 dB Filter Bandwidth in Hz Rev. I | Page 15 of 24 10k 02735-052 1k 10 02735-049 100k For a first-order filter, the total integrated noise from the AD8628 is lower than the noise of Competitor A. RMS NOISE (V) TIME (1s/DIV) AD8628/AD8629/AD8630 INPUT OVERVOLTAGE PROTECTION VOLTAGE (V) These diodes are connected between the inputs and each supply rail to protect the input transistors against an electrostatic discharge event, and they are normally reverse-biased. However, if the input voltage exceeds the supply voltage, these ESD diodes can become forward-biased. Without current limiting, excessive amounts of current could flow through these diodes, causing permanent damage to the device. If inputs are subject to overvoltage, appropriate series resistors should be inserted to limit the diode current to less than 5 mA maximum. 0V 0V VOUT 02735-053 Although the AD8628/AD8629/AD8630 are rail-to-rail input amplifiers, care should be taken to ensure that the potential difference between the inputs does not exceed the supply voltage. Under normal negative feedback operating conditions, the amplifier corrects its output to ensure that the two inputs are at the same voltage. However, if either input exceeds either supply rail by more than 0.3 V, large currents begin to flow through the ESD protection diodes in the amplifier. CH1 = 50mV/DIV CH2 = 1V/DIV AV = -50 VIN TIME (500s/DIV) Figure 56. Positive Input Overload Recovery for the AD8628 CH1 = 50mV/DIV CH2 = 1V/DIV AV = -50 VIN 0V 02735-054 VOUT The AD8628/AD8629/AD8630 amplifiers have been carefully designed to prevent any output phase reversal, provided that both inputs are maintained within the supply voltages. If one or both inputs could exceed either supply voltage, a resistor should be placed in series with the input to limit the current to less than 5 mA. This ensures that the output does not reverse its phase. TIME (500s/DIV) Figure 57. Positive Input Overload Recovery for Competitor A CH1 = 50mV/DIV CH2 = 1V/DIV AV = -50 VIN VOLTAGE (V) OVERLOAD RECOVERY TIME Many auto-zero amplifiers are plagued by a long overload recovery time, often in ms, due to the complicated settling behavior of the internal nulling loops after saturation of the outputs. The AD8628/AD8629/AD8630 have been designed so that internal settling occurs within two clock cycles after output saturation occurs. This results in a much shorter recovery time, less than 10 s, when compared to other auto-zero amplifiers. The wide bandwidth of the AD8628/AD8629/AD8630 enhances performance when the parts are used to drive loads that inject transients into the outputs. This is a common situation when an amplifier is used to drive the input of switched capacitor ADCs. 0V Rev. I | Page 16 of 24 0V 0V VOUT TIME (500s/DIV) Figure 58. Positive Input Overload Recovery for Competitor B 02735-055 Output phase reversal occurs in some amplifiers when the input common-mode voltage range is exceeded. As common-mode voltage is moved outside the common-mode range, the outputs of these amplifiers can suddenly jump in the opposite direction to the supply rail. This is the result of the differential input pair shutting down, causing a radical shifting of internal voltages that results in the erratic output behavior. VOLTAGE (V) OUTPUT PHASE REVERSAL AD8628/AD8629/AD8630 VOLTAGE (V) 0V The results shown in Figure 56 to Figure 61 are summarized in Table 5. CH1 = 50mV/DIV CH2 = 1V/DIV AV = -50 Table 5. Overload Recovery Time VIN Model AD8628 Competitor A Competitor B VOUT Negative Overload Recovery (s) 9 25,000 35,000 INFRARED SENSORS 02735-056 0V TIME (500s/DIV) Figure 59. Negative Input Overload Recovery for the AD8628 0V CH1 = 50mV/DIV CH2 = 1V/DIV AV = -50 VIN VOUT 0V TIME (500s/DIV) Infrared (IR) sensors, particularly thermopiles, are increasingly being used in temperature measurement for applications as wide ranging as automotive climate control, human ear thermometers, home insulation analysis, and automotive repair diagnostics. The relatively small output signal of the sensor demands high gain with very low offset voltage and drift to avoid dc errors. If interstage ac coupling is used, as in Figure 62, low offset and drift prevent the output of the input amplifier from drifting close to saturation. The low input bias currents generate minimal errors from the output impedance of the sensor. As with pressure sensors, the very low amplifier drift with time and temperature eliminate additional errors once the temperature measurement is calibrated. The low 1/f noise improves SNR for dc measurements taken over periods often exceeding one-fifth of a second. 02735-057 VOLTAGE (V) Positive Overload Recovery (s) 6 650 40,000 Figure 62 shows a circuit that can amplify ac signals from 100 V to 300 V up to the 1 V to 3 V levels, with a gain of 10,000 for accurate analog-to-digital conversion. 10k 100 Figure 60. Negative Input Overload Recovery for Competitor A 100k 100k 5V 5V IR DETECTOR 0V 1/2 AD8629 1/2 AD8629 10k fC 1.6Hz TO BIAS VOLTAGE VIN Figure 62. AD8629 Used as Preamplifier for Thermopile VOUT 0V TIME (500s/DIV) 02735-058 VOLTAGE (V) CH1 = 50mV/DIV CH2 = 1V/DIV AV = -50 10F Figure 61. Negative Input Overload Recovery for Competitor B Rev. I | Page 17 of 24 02735-059 100V TO 300V AD8628/AD8629/AD8630 PRECISION CURRENT SHUNT SENSOR OUTPUT AMPLIFIER FOR HIGH PRECISION DACS A precision current shunt sensor benefits from the unique attributes of auto-zero amplifiers when used in a differencing configuration, as shown in Figure 63. Current shunt sensors are used in precision current sources for feedback control systems. They are also used in a variety of other applications, including battery fuel gauging, laser diode power measurement and control, torque feedback controls in electric power steering, and precision power metering. The AD8628/AD8629/AD8360 are used as output amplifiers for a 16-bit high precision DAC in a unipolar configuration. In this case, the selected op amp needs to have a very low offset voltage (the DAC LSB is 38 V when operated with a 2.5 V reference) to eliminate the need for output offset trims. The input bias current (typically a few tens of picoamperes) must also be very low because it generates an additional zero code error when multiplied by the DAC output impedance (approximately 6 k). I 100k e = 1000 RS I 100mV/mA RS 0.1 Rail-to-rail input and output provide full-scale output with very little error. The output impedance of the DAC is constant and code independent, but the high input impedance of the AD8628/ AD8629/AD8630 minimizes gain errors. The wide bandwidth of the amplifiers also serves well in this case. The amplifiers, with settling time of 1 s, add another time constant to the system, increasing the settling time of the output. The settling time of the AD5541 is 1 s. The combined settling time is approximately 1.4 s, as can be derived from the following equation: RL 100 C 5V AD8628 100 C 02735-060 100k t S (TOTAL ) = Figure 63. Low-Side Current Sensing In such applications, it is desirable to use a shunt with very low resistance to minimize the series voltage drop; this minimizes wasted power and allows the measurement of high currents while saving power. A typical shunt might be 0.1 . At measured current values of 1 A, the output signal of the shunt is hundreds of millivolts, or even volts, and amplifier error sources are not critical. However, at low measured current values in the 1 mA range, the 100 V output voltage of the shunt demands a very low offset voltage and drift to maintain absolute accuracy. Low input bias currents are also needed, so that injected bias current does not become a significant percentage of the measured current. High open-loop gain, CMRR, and PSRR help to maintain the overall circuit accuracy. As long as the rate of change of the current is not too fast, an auto-zero amplifier can be used with excellent results. 5V (t S DAC )2 + (t S AD8628 )2 2.5V 0.1F 0.1F SERIAL INTERFACE VDD 10F REF(REFF*) REFS* CS DIN SCLK AD8628 AD5541/AD5542 VOUT UNIPOLAR OUTPUT LDAC* DGND AGND *AD5542 ONLY Rev. I | Page 18 of 24 Figure 64. AD8628 Used as an Output Amplifier 02735-061 SUPPLY AD8628/AD8629/AD8630 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 5 4 1 2 8 4.00 (0.1574) 3.80 (0.1497) 2.80 BSC 1.60 BSC 3 0.95 BSC 0.25 (0.0098) 0.10 (0.0040) *1.00 MAX 0.50 0.30 SEATING PLANE 8 4 0 0.60 0.45 0.30 *COMPLIANT TO JEDEC STANDARDS MO-193-AB WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS. 1 3.00 2.80 2.60 3.20 3.00 2.80 3 0.95 BSC 1.27 (0.0500) 0.40 (0.0157) 8 1 5 5.15 4.90 4.65 4 0.65 BSC 0.50 MAX 0.35 MIN 0.95 0.85 0.75 0.20 MAX 0.08 MIN SEATING PLANE 10 5 0 0.20 BSC COMPLIANT TO JEDEC STANDARDS MO-178-AA 0.55 0.45 0.35 15 MAX 1.10 MAX 0.15 0.05 COPLANARITY 0.10 0.40 0.25 6 0 0.23 0.09 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 66. 5-Lead Small Outline Transistor Package [SOT-23] (RJ-5) Dimensions shown in millimeters Figure 68. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters Rev. I | Page 19 of 24 0.80 0.55 0.40 10-07-2009-B 1.45 MAX 0.95 MIN 121608-A 0.15 MAX 0.05 MIN 0.25 (0.0098) 0.17 (0.0067) PIN 1 IDENTIFIER 1.90 BSC 1.30 1.15 0.90 45 8 0 3.20 3.00 2.80 4 2 0.50 (0.0196) 0.25 (0.0099) Figure 67. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) 3.00 2.90 2.80 5 1.75 (0.0688) 1.35 (0.0532) COMPLIANT TO JEDEC STANDARDS MS-012-AA 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. 5-Lead Thin Small Outline Transistor Package [TSOT] (UJ-5) Dimensions shown in millimeters 1.70 1.60 1.50 6.20 (0.2441) 5.80 (0.2284) 0.51 (0.0201) 0.31 (0.0122) COPLANARITY 0.10 SEATING PLANE 0.20 0.08 100708-A 0.10 MAX 4 1.27 (0.0500) BSC 1.90 BSC *0.90 MAX 0.70 MIN 5 1 012407-A 2.90 BSC AD8628/AD8629/AD8630 5.10 5.00 4.90 8.75 (0.3445) 8.55 (0.3366) 1 7 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122) 14 6.20 (0.2441) 5.80 (0.2283) 8 4.50 4.40 4.30 6.40 BSC 1 1.75 (0.0689) 1.35 (0.0531) SEATING PLANE 0.50 (0.0197) 0.25 (0.0098) PIN 1 8 0 0.25 (0.0098) 0.17 (0.0067) 7 45 0.65 BSC 1.27 (0.0500) 0.40 (0.0157) COMPLIANT TO JEDEC STANDARDS MS-012-AB 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. 1.05 1.00 0.80 1.20 MAX 0.15 0.05 COPLANARITY 0.10 0.30 0.19 SEATING PLANE 0.20 0.09 8 0 COMPLIANT TO JEDEC STANDARDS MO-153-AB-1 Figure 69. 14-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-14) Dimensions shown in millimeters and (inches) Figure 70. 14-Lead Thin Shrink Small Outline Package [TSSOP] (RU-14) Dimensions shown in millimeters Rev. I | Page 20 of 24 0.75 0.60 0.45 061908-A 8 14 060606-A 4.00 (0.1575) 3.80 (0.1496) AD8628/AD8629/AD8630 ORDERING GUIDE Model 1, 2 AD8628AUJ-REEL AD8628AUJ-REEL7 AD8628AUJZ-R2 AD8628AUJZ-REEL AD8628AUJZ-REEL7 AD8628ARZ AD8628ARZ-REEL AD8628ARZ-REEL7 AD8628ARTZ-R2 AD8628ARTZ-REEL7 AD8628WARZ-RL AD8628WARZ-R7 AD8628WARTZ-RL AD8628WARTZ-R7 AD8628WAUJZ-RL AD8628WAUJZ-R7 AD8629ARZ AD8629ARZ-REEL AD8629ARZ-REEL7 AD8629ARMZ AD8629ARMZ-REEL AD8629WARZ-RL AD8629WARZ-R7 AD8630ARUZ AD8630ARUZ-REEL AD8630ARZ AD8630ARZ-REEL AD8630ARZ-REEL7 AD8630WARZ-RL AD8630WARZ-R7 1 2 Temperature Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package Description 5-Lead TSOT 5-Lead TSOT 5-Lead TSOT 5-Lead TSOT 5-Lead TSOT 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 5-Lead SOT-23 5-Lead SOT-23 8-Lead SOIC_N 8-Lead SOIC_N 5-Lead SOT-23 5-Lead SOT-23 5-Lead TSOT 5-Lead TSOT 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 14-Lead TSSOP 14-Lead TSSOP 14-Lead SOIC_N 14-Lead SOIC_N 14-Lead SOIC_N 14-Lead SOIC_N 14-Lead SOIC_N Package Option UJ-5 UJ-5 UJ-5 UJ-5 UJ-5 R-8 R-8 R-8 RJ-5 RJ-5 R-8 R-8 RJ-5 RJ-5 UJ-5 UJ-5 R-8 R-8 R-8 RM-8 RM-8 R-8 R-8 RU-14 RU-14 R-14 R-14 R-14 R-14 R-14 Branding AYB AYB A0L A0L A0L A0L A0L A0L A0L A0L A0L A0L A0L A06 A06 Z = RoHS Compliant Part. W = Qualified for Automotive Applications. AUTOMOTIVE PRODUCTS The AD8628W/AD8629W/AD8630W models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models. Rev. I | Page 21 of 24 AD8628/AD8629/AD8630 NOTES Rev. I | Page 22 of 24 AD8628/AD8629/AD8630 NOTES Rev. I | Page 23 of 24 AD8628/AD8629/AD8630 NOTES (c)2002-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D02735-0-4/11(I) Rev. I | Page 24 of 24