Low Noise, Low Drift Single-Supply Operational Amplifiers OP113/OP213/OP413 PIN CONFIGURATIONS NULL 1 -IN A 2 +IN A 3 V- 4 OP113 TOP VIEW (Not to Scale) 8 NC OUT A 1 7 V+ -IN A 2 6 OUT A +IN A 3 5 NULL V- 4 NC = NO CONNECT Figure 1. 8-Lead Narrow-Body SOIC_N OP213 TOP VIEW (Not to Scale) 8 V+ 7 OUT B 6 -IN B 5 +IN B 00286-002 Single- or dual-supply operation Low noise: 4.7 nV/Hz @ 1 kHz Wide bandwidth: 3.4 MHz Low offset voltage: 100 V Very low drift: 0.2 V/C Unity gain stable No phase reversal 00286-001 FEATURES Figure 2. 8-Lead Narrow-Body SOIC_N GENERAL DESCRIPTION The OPx13 family of single-supply operational amplifiers features both low noise and drift. It has been designed for systems with internal calibration. Often these processor-based systems are capable of calibrating corrections for offset and gain, but they cannot correct for temperature drifts and noise. Optimized for these parameters, the OPx13 family can be used to take advantage of superior analog performance combined with digital correction. Many systems using internal calibration operate from unipolar supplies, usually either 5 V or 12 V. The OPx13 family is designed to operate from single supplies from 4 V to 36 V and to maintain its low noise and precision performance. The OPx13 family is unity gain stable and has a typical gain bandwidth product of 3.4 MHz. Slew rate is in excess of 1 V/s. Noise density is a very low 4.7 nV/Hz, and noise in the 0.1 Hz to 10 Hz band is 120 nV p-p. Input offset voltage is guaranteed and offset drift is guaranteed to be less than 0.8 V/C. Input common-mode range includes the negative supply and to within 1 V of the positive supply over the full supply range. Phase reversal protection is designed into the OPx13 family for cases where input voltage range is exceeded. Output voltage swings also include the negative supply and go to within 1 V of the positive rail. The output is capable of sinking and sourcing current throughout its range and is specified with 600 loads. OUT A 1 -IN A 2 +IN A V- 3 4 OP213 8 V+ 7 OUT B 6 5 -IN B +IN B OUT A 1 16 OUT D -IN A 2 15 -IN D +IN A 3 14 +IN D V+ 4 13 V- +IN B 5 12 +IN C -IN B 6 11 -IN C OUT B 7 10 OUT C NC 8 9 NC OP413 TOP VIEW (Not to Scale) NC = NO CONNECT Figure 3. 8-Lead PDIP Figure 4. 16-Lead Wide-Body SOIC_W Digital scales and other strain gage applications benefit from the very low noise and low drift of the OPx13 family. Other applications include use as a buffer or amplifier for both analogto-digital (ADC) and digital-to-analog (DAC) sigma-delta converters. Often these converters have high resolutions requiring the lowest noise amplifier to utilize their full potential. Many of these converters operate in either singlesupply or low-supply voltage systems, and attaining the greater signal swing possible increases system performance. The OPx13 family is specified for single 5 V and dual 15 V operation over the XIND--extended industrial temperature range (-40C to +85C). They are available in PDIP and SOIC surface-mount packages. Rev. F 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)1993-2007 Analog Devices, Inc. All rights reserved. 00286-004 Digital scales Multimedia Strain gages Battery-powered instrumentation Temperature transducer amplifier 00286-003 APPLICATIONS OP113/OP213/OP413 TABLE OF CONTENTS Features .............................................................................................. 1 A Low Voltage, Single Supply Strain Gage Amplifier............ 14 Applications....................................................................................... 1 General Description ......................................................................... 1 A High Accuracy Linearized RTD Thermometer Amplifier ..................................................................................... 14 Pin Configurations ........................................................................... 1 A High Accuracy Thermocouple Amplifier........................... 15 Revision History ............................................................................... 2 An Ultralow Noise, Single Supply Instrumentation Amplifier ..................................................................................... 15 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution.................................................................................. 6 Typical Performance Characteristics ............................................. 7 Applications..................................................................................... 13 Phase Reversal............................................................................. 13 OP113 Offset Adjust .................................................................. 13 Supply Splitter Circuit................................................................ 15 Low Noise Voltage Reference.................................................... 16 5 V Only Stereo DAC for Multimedia ..................................... 16 Low Voltage Headphone Amplifiers........................................ 17 Low Noise Microphone Amplifier for Multimedia ............... 17 Precision Voltage Comparator.................................................. 17 Outline Dimensions ....................................................................... 19 Ordering Guide .......................................................................... 20 Application Circuits ....................................................................... 14 A High Precision Industrial Load-Cell Scale Amplifier........ 14 REVISION HISTORY 3/07--Rev. E to Rev. F Updated Format..................................................................Universal Changes to Pin Configurations....................................................... 1 Changes to Absolute Maximum Ratings Section......................... 6 Deleted Spice Model....................................................................... 15 Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 20 8/02--Rev. D to Rev. E Edits to Figure 6 .............................................................................. 13 Edits to Figure 7 .............................................................................. 13 Edits to OUTLINE DIMENSIONS .............................................. 16 9/01--Rev. C to Rev. E Edits to ORDERING GUIDE.......................................................... 4 Rev. F | Page 2 of 24 OP113/OP213/OP413 SPECIFICATIONS ELECTRICAL CHARACTERISTICS @ VS = 15.0 V, TA = 25C, unless otherwise noted. Table 1. E Grade Parameter Symbol Conditions INPUT CHARACTERISTICS Offset Voltage VOS OP113 -40C TA +85C OP213 -40C TA +85C OP413 -40C TA +85C VCM = 0 V -40C TA +85C VCM = 0 V -40C TA +85C Input Bias Current IB Input Offset Current IOS Input Voltage Range Common-Mode Rejection VCM CMR Large-Signal Voltage Gain AVO Long-Term Offset Voltage1 Offset Voltage Drift2 OUTPUT CHARACTERISTICS Output Voltage Swing High VOH VOL Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio ISC Supply Voltage Range -15 V VCM +14 V -15 V VCM +14 V, -40C TA +85C OP113, OP213, RL = 600 , -40C TA +85C OP413, RL = 1 k, -40C TA +85C RL = 2 k, -40C TA +85C PSRR ISY VS Typ 240 Min Max Unit 150 225 250 325 275 350 600 700 V V V V V V nA nA 50 +14 nA V dB 116 -15 96 97 116 94 dB 1 2.4 1 V/V 1 2.4 1 V/V 2 8 2 150 0.8 14 300 1.5 14 13.9 V/V V V/C V 13.9 -14.5 -14.5 -14.5 -14.5 40 VS = 2 V to 18 V VS = 2 V to 18 V -40C TA +85C VOUT = 0 V, RL = , VS = 18 V -40C TA +85C Typ 75 125 100 150 125 175 600 700 50 +14 0.2 RL = 2 k RL = 2 k, -40C TA +85C RL = 2 k RL = 2 k, -40C TA +85C F Grade Max -15 100 VOS VOS/T Output Voltage Swing Low Supply Current/Amplifier Min 40 V V V mA 103 120 100 dB 100 120 97 dB 4 Rev. F | Page 3 of 24 3 3.8 18 4 3 3.8 18 mA mA V OP113/OP213/OP413 Parameter Symbol AUDIO PERFORMANCE THD + Noise Voltage Noise Density Current Noise Density Voltage Noise DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Channel Separation Settling Time 1 2 en in en p-p SR GBP tS Conditions Min VIN = 3 V rms, RL = 2 k, f = 1 kHz f = 10 Hz f = 1 kHz f = 1 kHz 0.1 Hz to 10 Hz RL = 2 k E Grade Typ Max Min 0.0009 9 4.7 0.4 120 0.8 VOUT = 10 V p-p RL = 2 k, f = 1 kHz to 0.01%, 0 V to 10 V step 1.2 3.4 0.8 105 9 F Grade Typ Max Unit 0.0009 9 4.7 0.4 120 % nV/Hz nV/Hz pA/Hz nV p-p 1.2 3.4 V/s MHz 105 9 dB s Long-term offset voltage is guaranteed by a 1000 hour life test performed on three independent lots at 125C, with an LTPD of 1.3. Guaranteed specifications, based on characterization data. @ VS = 5.0 V, TA = 25C, unless otherwise noted. Table 2. Parameter Symbol Conditions INPUT CHARACTERISTICS Offset Voltage VOS OP113 -40C TA +85C OP213 -40C TA +85C OP413 -40C TA +85C VCM = 0 V, VOUT = 2 -40C TA +85C VCM = 0 V, VOUT = 2 -40C TA +85C Input Bias Current IB Input Offset Current IOS Input Voltage Range Common-Mode Rejection VCM CMR Large-Signal Voltage Gain AVO Long-Term Offset Voltage1 VOS Offset Voltage Drift2 VOS/T 0 V VCM 4 V 0 V VCM 4 V, -40C TA +85C OP113, OP213, RL = 600 , 2 k, 0.01 V VOUT 3.9 V OP413, RL = 600, 2 k, 0.01 V VOUT 3.9 V Min E Grade Typ Max F Grade Typ Max Unit 125 175 150 225 175 250 650 750 175 250 300 375 325 400 650 750 V V V V V V nA nA 50 4 50 4 90 nA V dB 90 87 dB 2 2 V/V 300 0 93 106 1 1 0.2 Rev. F | Page 4 of 24 Min 200 350 V/V V 1.0 1.5 V/C OP113/OP213/OP413 E Grade Typ Max Symbol Conditions Min OUTPUT CHARACTERISTICS Output Voltage Swing High VOH RL = 600 k RL = 100 k, -40C TA +85C RL = 600 , -40C TA +85C RL = 600 , -40C TA +85C RL = 100 k, -40C TA +85C 4.0 4.0 V 4.1 4.1 V 3.9 3.9 V Output Voltage Swing Low Short-Circuit Limit POWER SUPPLY Supply Current AUDIO PERFORMANCE THD + Noise Voltage Noise Density Current Noise Density Voltage Noise DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Settling Time 1 2 VOL 8 VOUT = 2.0 V, no load ISY -40C TA +85C en in en p-p SR GBP tS 1.6 VOUT = 0 dBu, f = 1 kHz f = 10 Hz f = 1 kHz f = 1 kHz 0.1 Hz to 10 Hz RL = 2 k 8 30 0.9 3.5 5.8 mV mV mA 2.7 mA 3.0 3.0 mA 0.001 9 4.7 0.45 120 % nV/Hz nV/Hz pA/Hz nV p-p 3.5 5.8 V/s MHz s 0.6 Long-term offset voltage is guaranteed by a 1000 hour life test performed on three independent lots at 125C, with an LTPD of 1.3. Guaranteed specifications, based on characterization data. Rev. F | Page 5 of 24 Unit 2.7 0.001 9 4.7 0.45 120 0.6 to 0.01%, 2 V step 8 8 30 ISC ISY Min F Grade Typ Max Parameter OP113/OP213/OP413 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range (Soldering, 60 sec) Rating 18 V 18 V 10 V Indefinite -65C to +150C -40C to +85C -65C to +150C 300C Table 4. Thermal Resistance Package Type JA JC Unit 8-Lead PDIP (P) 8-Lead SOIC_N (S) 16-Lead SOIC_W (S) 103 158 92 43 43 27 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. Rev. F | Page 6 of 24 OP113/OP213/OP413 TYPICAL PERFORMANCE CHARACTERISTICS 100 150 VS = 15V TA = 25C 400 x OP AMPS PLASTIC PACKAGE 80 VS = 15V -40C TA +85C 400 x OP AMPS PLASTIC PACKAGE 120 60 60 20 30 00286-005 40 0 -50 -40 -30 -20 -10 0 10 20 30 INPUT OFFSET VOLTAGE, VOS (V) 40 0 50 Figure 5. OP113 Input Offset (VOS) Distribution @ 15 V 0 0.1 0.2 0.3 0.4 0.5 0.6 TCVOS (V) 0.7 0.8 0.9 1.0 Figure 8. OP113 Temperature Drift (TCVOS) Distribution @ 15 V 500 500 VS = 15V TA = 25C 896 x OP AMPS PLASTIC PACKAGE 400 00286-008 UNITS UNITS 90 VS = 15V -40C TA +85C 896 x OP AMPS PLASTIC PACKAGE 400 300 200 100 100 0 -100 00286-006 200 -80 -60 -40 -20 0 20 40 60 80 0 100 00286-009 UNITS UNITS 300 0 0.1 0.2 0.3 INPUT OFFSET VOLTAGE, VOS (V) Figure 6. OP213 Input Offset (VOS) Distribution @ 15 V 0.7 0.8 0.9 1.0 Figure 9. OP213 Temperature Drift (TCVOS) Distribution @ 15 V 500 400 0.4 0.5 0.6 TCVOS (V) 600 VS = 15V TA = 25C 1220 x OP AMPS PLASTIC PACKAGE VS = 15V -40C TA +85C 1220 x OP AMPS PLASTIC PACKAGE 500 400 UNITS UNITS 300 300 200 200 100 -40 -20 0 20 40 60 80 100 INPUT OFFSET VOLTAGE, VOS (V) 120 0 140 Figure 7. OP413 Input Offset (VOS) Distribution @ 15 V 00286-010 00286-007 0 -60 100 0 0.1 0.2 0.3 0.4 0.5 0.6 TCVOS (V) 0.7 0.8 0.9 1.0 Figure 10. OP413 Temperature Drift (TCVOS) Distribution @ 15 V Rev. F | Page 7 of 24 OP113/OP213/OP413 800 400 INPUT BIAS CURRENT (nA) 500 VCM = 0V 600 VS = +5V VCM = +2.5V VS = 15V VCM = 0V -50 -25 0 25 50 TEMPERATURE (C) 75 100 0 -75 125 5.0 1.0 3.5 0.5 -SWING RL = 600 -25 0 25 50 TEMPERATURE (C) 75 POSITIVE OUTPUT SWING (V) -SWING RL = 2k NEGATIVE OUTPUT SWING (mV) +SWING RL = 2k 100 0 125 +SWING RL = 2k 13.5 +SWING RL = 600 13.0 12.5 -SWING RL = 2k -13.5 -SWING RL = 600 -14.0 -15.0 -75 -50 -25 0 25 50 TEMPERATURE (C) 75 100 125 20 VS = 15V TA = 25C VS = 5V VO = 3.9V 18 20 OPEN-LOOP GAIN (V/V) 16 0 -20 -40 -60 -80 -100 100 1k 10k 100k FREQUENCY (Hz) RL = 2k 14 12 10 8 RL = 600 6 4 105 -120 10 125 Figure 15. Output Swing vs. Temperature and RL @ 15 V 00286-013 CHANNEL SEPARATION (dB) 40 100 14.0 Figure 12. Output Swing vs. Temperature and RL @ 5 V 60 75 -14.5 00286-012 POSITIVE OUTPUT SWING (V) 1.5 -50 VS = 15V 14.5 4.5 3.0 -75 0 25 50 TEMPERATURE (C) 15.0 2.0 VS = 5V +SWING RL = 600 -25 -50 Figure 14. OP213 Input Bias Current vs. Temperature Figure 11. OP113 Input Bias Current vs. Temperature 4.0 00286-014 0 -75 200 100 00286-011 200 VS = 15V 00286-015 400 VS = +5V 300 1M 00286-016 INPUT BIAS CURRENT (nA) 1000 2 0 -75 10M Figure 13. Channel Separation -50 -25 0 25 50 TEMPERATURE (C) 75 100 Figure 16. Open-Loop Gain vs. Temperature @ 5 V Rev. F | Page 8 of 24 125 OP113/OP213/OP413 12.5 10 VS = 15V VD = 10V RL = 2k 10.0 8 OPEN-LOOP GAIN (V/V) 7.5 RL = 1k 5.0 RL = 600 2.5 RL = 2k 7 6 5 4 3 RL = 600 -50 -25 0 25 50 TEMPERATURE (C) 75 100 1 0 -75 125 -25 0 25 50 TEMPERATURE (C) 75 125 100 100 V+ = 5V V- = 0V TA = 25C 80 45 GAIN 40 90 PHASE m = 57 20 135 10k 100k FREQUENCY (Hz) 225 10M 1M 00286-018 -20 1k 40 20 135 180 10k 100k FREQUENCY (Hz) 225 10M 1M Figure 21. Open-Loop Gain, Phase vs. Frequency @ 15 V 50 TA = 25C VS = 15V 40 AV = 100 CLOSED-LOOP GAIN (dB) AV = 100 30 20 AV = 10 10 0 AV = 1 10k 100k FREQUENCY (Hz) 1M 30 20 AV = 10 10 0 AV = 1 -10 00286-019 -10 -20 1k m = 72 -20 1k V+ = 5V V- = 0V TA = 25C 40 90 PHASE Figure 18. Open-Loop Gain, Phase vs. Frequency @ 5 V 50 45 GAIN 0 180 0 60 -20 1k 10M 10k 100k FREQUENCY (Hz) 1M Figure 22. Closed-Loop Gain vs. Frequency @ 15 V Figure 19. Closed-Loop Gain vs. Frequency @ 5 V Rev. F | Page 9 of 24 PHASE (Degrees) 60 0 10M 00286-021 0 OPEN-LOOP GAIN (dB) 80 TA = 25C VS = 15V PHASE (Degrees) 100 OPEN-LOOP GAIN (dB) -50 Figure 20. OP213 Open-Loop Gain vs. Temperature Figure 17. OP413 Open-Loop Gain vs. Temperature CLOSED-LOOP GAIN (dB) 00286-020 0 -75 00286-017 2 00286-052 OPEN-LOOP GAIN (V/V) VS = 15V VO = 10V 9 OP113/OP213/OP413 70 70 5 5 3 m 2 55 50 -75 -50 -25 0 25 50 TEMPERATURE (C) 75 100 1 125 Figure 23. Gain Bandwidth Product and Phase Margin vs. Temperature @ 5 V 4 GBW m 60 3 55 2 50 -75 -50 -25 0 25 50 TEMPERATURE (C) 75 TA = 25C VS = 15V 20 15 10 5 1 10 100 2.5 2.0 1.5 1.0 0.5 0 1k 00286-026 CURRENT NOISE DENSITY (pA/ Hz) 25 00286-023 VOLTAGE NOISE DENSITY (nV/ Hz) 1 125 3.0 TA = 25C VS = 15V 1 10 FREQUENCY (Hz) Figure 27. Current Noise Density vs. Frequency 140 V+ = 5V V- = 0V TA = 25C 100 80 60 40 00286-024 20 10k FREQUENCY (Hz) 100k TA = 25C VS = 15V 120 COMMON-MODE REJECTION (dB) 120 1k 1k 100 80 60 40 20 0 100 1M Figure 25. Common-Mode Rejection vs. Frequency @ 5 V 00286-027 140 0 100 100 FREQUENCY (Hz) Figure 24. Voltage Noise Density vs. Frequency COMMON-MODE REJECTION (dB) 100 Figure 26. Gain Bandwidth Product and Phase Margin vs. Temperature @ 15 V 30 0 GAIN BANDWIDTH PRODUCT (MHz) GBW 60 65 00286-025 4 PHASE MARGIN (Degrees) 65 GAIN BANDWIDTH PRODUCT (MHz) VS = 15V 00286-022 PHASE MARGIN (Degrees) V+ = 5V V- = 0V 1k 10k FREQUENCY (Hz) 100k 1M Figure 28. Common-Mode Rejection vs. Frequency @ 15 V Rev. F | Page 10 of 24 OP113/OP213/OP413 40 120 30 100 IMPEDANCE () +PSRR 80 60 -PSRR 40 AV = 100 AV = 10 20 1k 10k FREQUENCY (Hz) 100k 0 100 1M 10k 100k 1M FREQUENCY (Hz) Figure 32. Closed-Loop Output Impedance vs. Frequency @ 15 V 30 6 VS = 5V RL = 2k TA = 25C AVCL = 1 VS = 15V RL = 2k TA = 25C AVOL = 1 25 MAXIMUM OUTPUT SWING (V) 5 4 3 2 20 15 10 00286-029 0 1k 10k 100k FREQUENCY (Hz) 1M 0 1k 10M 00286-032 5 1 10k 100k FREQUENCY (Hz) 1M 10M Figure 33. Maximum Output Swing vs. Frequency @ 15 V Figure 30. Maximum Output Swing vs. Frequency @ 5 V 20 50 VS = 5V RL = 2k VIN = 100mV p-p TA = 25C AVCL = 1 35 16 14 30 NEGATIVE EDGE 25 20 POSITIVE EDGE 15 12 8 6 5 2 00286-030 4 100 200 300 LOAD CAPACITANCE (pF) 400 NEGATIVE EDGE 10 10 0 POSITIVE EDGE 0 500 00286-033 40 VS = 15V RL = 2k VIN = 100mV p-p TA = 25C AVCL = 1 18 OVERSHOOT (%) 45 0 1k 00286-031 AV = 1 Figure 29. Power Supply Rejection vs. Frequency @ 15 V MAXIMUM OUTPUT SWING (V) 20 10 0 100 OVERSHOOT (%) TA = 25C VS = 15V TA = 25C VS = 15V 00286-028 POWER SUPPLY REJECTION (dB) 140 0 100 200 300 LOAD CAPACITANCE (pF) 400 500 Figure 34. Small-Signal Overshoot vs. Load Capacitance @ 15 V Figure 31. Small-Signal Overshoot vs. Load Capacitance @ 5 V Rev. F | Page 11 of 24 OP113/OP213/OP413 2.0 VS = 5V 0.5V VOUT 4.0V VS = 15V -10V VOUT +10V 1.5 +SLEW RATE SLEW RATE (V/s) SLEW RATE (V/s) 1.5 1.0 -SLEW RATE 0.5 -SLEW RATE 1.0 0.5 00286-034 0 -75 +SLEW RATE -50 -25 0 25 50 TEMPERATURE (C) 75 100 0 -75 125 Figure 35. Slew Rate vs. Temperature @ 5 V (0.5 V VOUT 4.0 V) 00286-037 2.0 -50 -25 0 25 50 TEMPERATURE (C) 75 100 125 Figure 38. Slew Rate vs. Temperature @ 15 V (-10 V VOUT +10.0 V) 1s 1s 100 100 90 90 10 10 0% 20mV 00286-038 00286-035 0% 20mV Figure 36. Input Voltage Noise @ 15 V (20 nV/div) Figure 39. Input Voltage Noise @ 5 V (20 nV/div) 5 100 AV = 100 tOUT 00286-036 0.1Hz TO 10Hz AV = 1000 VS = 18V VS = +5V 2 1 0 -75 Figure 37. Noise Test Diagram VS = 15V 3 00286-039 909 SUPPLY CURRENT (mA) 4 -50 -25 0 25 50 TEMPERATURE (C) 75 Figure 40. Supply Current vs. Temperature Rev. F | Page 12 of 24 100 125 OP113/OP213/OP413 APPLICATIONS The OP113, OP213, and OP413 form a new family of high performance amplifiers that feature precision performance in standard dual-supply configurations and, more importantly, maintain precision performance when a single power supply is used. In addition to accurate dc specifications, it is the lowest noise single-supply amplifier available with only 4.7 nV/Hz typical noise density. Single-supply applications have special requirements due to the generally reduced dynamic range of the output signal. Singlesupply applications are often operated at voltages of 5 V or 12 V, compared to dual-supply applications with supplies of 12 V or 15 V. This results in reduced output swings. Where a dualsupply application may often have 20 V of signal output swing, single-supply applications are limited to, at most, the supply range and, more commonly, several volts below the supply. In order to attain the greatest swing, the single-supply output stage must swing closer to the supply rails than in dual-supply applications. The OPx13 family has a new patented output stage that allows the output to swing closer to ground, or the negative supply, than previous bipolar output stages. Previous op amps had outputs that could swing to within about 10 mV of the negative supply in single-supply applications. However, the OPx13 family combines both a bipolar and a CMOS device in the output stage, enabling it to swing to within a few hundred V of ground. When operating with reduced supply voltages, the input range is also reduced. This reduction in signal range results in reduced signal-to-noise ratio for any given amplifier. There are only two ways to improve this: increase the signal range or reduce the noise. The OPx13 family addresses both of these parameters. Input signal range is from the negative supply to within 1 V of the positive supply over the full supply range. Competitive parts have input ranges that are 0.5 V to 5 V less than this. Noise has also been optimized in the OPx13 family. At 4.7 nV/Hz, the noise is less than one fourth that of competitive devices. PHASE REVERSAL The OPx13 family is protected against phase reversal as long as both of the inputs are within the supply ranges. However, if there is a possibility of either input going below the negative supply (or ground in the single-supply case), the inputs should be protected with a series resistor to limit input current to 2 mA. OP113 OFFSET ADJUST The OP113 has the facility for external offset adjustment, using the industry standard arrangement. Pin 1 and Pin 5 are used in conjunction with a potentiometer of 10 k total resistance, connected with the wiper to V- (or ground in single-supply applications). The total adjustment range is about 2 mV using this configuration. Adjusting the offset to 0 has minimal effect on offset drift (assuming the potentiometer has a tempco of less than 1000 ppm/C). Adjustment away from 0, however, (as with all bipolar amplifiers) results in a TCVOS of approximately 3.3 V/C for every millivolt of induced offset. It is, therefore, not generally recommended that this trim be used to compensate for system errors originating outside of the OP113. The initial offset of the OP113 is low enough that external trimming is almost never required, but if necessary, the 2 mV trim range may be somewhat excessive. Reducing the trimming potentiometer to a 2 k value results in a more reasonable range of 400 V. Rev. F | Page 13 of 24 OP113/OP213/OP413 APPLICATION CIRCUITS 5V A HIGH PRECISION INDUSTRIAL LOAD-CELL SCALE AMPLIFIER 2 The OPx13 family makes an excellent amplifier for conditioning a load-cell bridge. Its low noise greatly improves the signal resolution, allowing the load cell to operate with a smaller output range, thus reducing its nonlinearity. Figure 41 shows one half of the OPx13 family used to generate a very stable 10 V bridge excitation voltage while the second amplifier provides a differential gain. R4 should be trimmed for maximum common-mode rejection. +15V +10V 8 1 1/2 + 3 A2 - 2 R3 17.2k 0.1% 350 LOAD CELL 100mV F.S. 13 R4 500 A1 OP213 R1 100k 7 OUTPUT 0 10V FS 00286-040 R2 301 0.1% 5V R7 20k 1 OUTPUT 0V 3.5V 8 1/2 7 4 R3 20k R4 100k R2 20k R5 2.1k R6 27.4 RG = 2127.4 Figure 42. Single Supply Strain Gage Amplifier A HIGH ACCURACY LINEARIZED RTD THERMOMETER AMPLIFIER -15V R1 17.2k 0.1% 1/2 OP213 8 CMRR TRIM 10-TURN T.C. LESS THAN 50ppm/C 7 1/2 4 4 - 2 3 + + 10F 6 - 5 + 11 12 4 OP295 10 6 GND 15 AD588BQ 4 +10V REF43 6 OUT 6 - 2 - 9 OP213 2.5V OP295 R8 12k 14 3 + 3 5 + 16 1 1/2 4V 350 35mV FS -15V 2 1 00286-041 2N2219A R5 1k 8 2N2222A IN Figure 41. Precision Load-Cell Scale Amplifier A LOW VOLTAGE, SINGLE SUPPLY STRAIN GAGE AMPLIFIER The true zero swing capability of the OPx13 family allows the amplifier in Figure 42 to amplify the strain gage bridge accurately even with no signal input while being powered by a single 5 V supply. A stable 4 V bridge voltage is made possible by the rail-to-rail OP295 amplifier, whose output can swing to within a millivolt of either rail. This high voltage swing greatly increases the bridge output signal without a corresponding increase in bridge input. Zero suppressing the bridge facilitates simple linearization of the resistor temperature device (RTD) by feeding back a small amount of the output signal to the RTD. In Figure 43, the left leg of the bridge is servoed to a virtual ground voltage by Amplifier A1, and the right leg of the bridge is servoed to 0 V by Amplifier A2. This eliminates any error resulting from common-mode voltage change in the amplifier. A 3-wire RTD is used to balance the wire resistance on both legs of the bridge, thereby reducing temperature mismatch errors. The 5 V bridge excitation is derived from the extremely stable AD588 reference device with 1.5 ppm/C drift performance. Linearization of the RTD is done by feeding a fraction of the output voltage back to the RTD in the form of a current. With just the right amount of positive feedback, the amplifier output will be linearly proportional to the temperature of the RTD. Rev. F | Page 14 of 24 OP113/OP213/OP413 16 2 12V 0.1F + 2 REF02EZ 4 11 1 6 3 9 8 R9 124k 12V 10F + D1 4 7 R5 40.2k 1N4148 15 R3 50 RG FULL SCALE ADJUST R2 8.25k 10 + K-TYPE THERMOCOUPLE 40.7V/C R5 R7 4.02k 100 R1 8.25k - - + + +15V RW1 6 - R4 100 7 1/2 OP213 -15V RW3 R8 49.9k 2 - A1 3 + R8 453 R2 2.74k + 2 - 8 1/2 1 OP213 R6 200 R3 53.6 3 + 0V TO 10V (0C TO 1000C) 4 8 A2 5 + 4 RW2 0.1F R4 5.62k VOUT (10mV/C) -1.5V = -150C +5V = +500C R9 5k LINEARITY ADJUST @1/2 FS 1 00286-042 AD588BQ 13 100 RTD R1 10.7k 14 12 10F 5V 6 00286-043 +15V 1/2 OP213 Figure 43. Ultraprecision RTD Amplifier To calibrate the circuit, first immerse the RTD in a 0C ice bath or substitute an exact 100 resistor in place of the RTD. Adjust the zero adjust potentiometer for a 0 V output, and then set R9, linearity adjust potentiometer, to the middle of its adjustment range. Substitute a 280.9 resistor (equivalent to 500C) in place of the RTD, and adjust the full-scale adjust potentiometer for a full-scale voltage of 5 V. Figure 44. Accurate K-Type Thermocouple Amplifier R6 should be adjusted for a 0 V output with the thermocouple measuring tip immersed in a 0C ice bath. When calibrating, be sure to adjust R6 initially to cause the output to swing in the positive direction first. Then back off in the negative direction until the output just stops changing. AN ULTRALOW NOISE, SINGLE SUPPLY INSTRUMENTATION AMPLIFIER Extremely low noise instrumentation amplifiers can be built using the OPx13 family. Such an amplifier that operates from a single supply is shown in Figure 45. Resistors R1 to R5 should be of high precision and low drift type to maximize CMRR performance. Although the two inputs are capable of operating to 0 V, the gain of -100 configuration limits the amplifier input common-mode voltage to 0.33 V. 5V TO 36V To calibrate out the nonlinearity, substitute a 194.07 resistor (equivalent to 250C) in place of the RTD, and then adjust the linearity adjust potentiometer for a 2.5 V output. Check and readjust the full-scale and half-scale as needed. + 1/2 OP213 - + VOUT - 1/2 OP213 Once calibrated, the amplifier outputs a 10 mV/C temperature coefficient with an accuracy better than 0.5C over an RTD measurement range of -150C to +500C. Indeed the amplifier can be calibrated to a higher temperature range, up to 850C. *R1 10k - *R2 10k *R3 10k *RG (200 + 12.7) *ALL RESISTORS 0.1%, 25ppm/C. A HIGH ACCURACY THERMOCOUPLE AMPLIFIER Figure 44 shows a popular K-type thermocouple amplifier with cold-junction compensation. Operating from a single 12 V supply, the OPx13 family's low noise allows temperature measurement to better than 0.02C resolution over a 0C to 1000C range. The cold-junction error is corrected by using an inexpensive silicon diode as a temperature measuring device. It should be placed as close to the two terminating junctions as physically possible. An aluminum block might serve well as an isothermal system. + VIN *R4 10k GAIN = 20k +6 RG 00286-044 -15V Figure 45. Ultralow Noise, Single Supply Instrumentation Amplifier SUPPLY SPLITTER CIRCUIT The OPx13 family has excellent frequency response characteristics that make it an ideal pseudoground reference generator, as shown in Figure 46. The OPx13 family serves as a voltage follower buffer. In addition, it drives a large capacitor that serves as a charge reservoir to minimize transient load changes, as well as a low impedance output device at high frequencies. The circuit easily supplies 25 mA load current with good settling characteristics. Rev. F | Page 15 of 24 OP113/OP213/OP413 12V R3 2.5k 5V - 10F + 5V R1 5k - 1/2 OP213 + R4 100 1 VS+ + 4 2 C2 1F OP213 10k 3 + C2 10F REF43 GND OUTPUT + 4 The OPx13 family's low noise and single supply capability are ideally suited for stereo DAC audio reproduction or sound synthesis applications such as multimedia systems. Figure 48 shows an 18-bit stereo DAC output setup that is powered from a single 5 V supply. The low noise preserves the 18-bit dynamic range of the AD1868. For DACs that operate on dual supplies, the OPx13 family can also be powered from the same supplies. Few reference devices combine low noise and high output drive capabilities. Figure 47 shows the OPx13 family used as a twopole active filter that band limits the noise of the 2.5 V reference. Total noise measures 3 V p-p. 5V SUPPLY AD1868 2 3 4 5 6 7 18-BIT LL DAC VBL V OL DR 18-BIT LR SERIAL REG. DGND 18-BIT DAC 8 VBR 220F 1/2 7.68k 330pF 9.76k + OP213 2 - 7.68k 11 7.68k 10 47k 100pF 7.68k VS LEFT CHANNEL OUTPUT + - 100pF AGND 12 V OR 1 4 13 VREF + - 14 8 + 15 VREF CK 16 3 - + 18-BIT DL SERIAL REG. 3V p-p NOISE 5 V ONLY STEREO DAC FOR MULTIMEDIA LOW NOISE VOLTAGE REFERENCE VL 9 330pF OUTPUT 2.5V Figure 47. Low Noise Voltage Reference Figure 46. False Ground Generator 1 1 4 00286-045 3 10k OUT 6 8 8 - 1/2 IN 2 R2 5k 2 2 00286-046 C1 0.1F 9.76k + 6 - 1/2 OP213 5 + Figure 48. 5 V Only 18-Bit Stereo DAC Rev. F | Page 16 of 24 220F 7 + - 47k RIGHT CHANNEL OUTPUT 00286-047 VS+ = 5V OP113/OP213/OP413 10k LOW VOLTAGE HEADPHONE AMPLIFIERS 5V Figure 49 shows a stereo headphone output amplifier for the AD1849 16-bit SOUNDPORT(R) stereo codec device. 1 The pseudo-reference voltage is derived from the common-mode voltage generated internally by the AD1849, thus providing a convenient bias for the headphone output amplifiers. 10F + 10k 1/2 OP213 50 20 17 MINL + 100 AD1849 5V 5k 1/2 19 CMOUT - OP213 + 5V 10F - LOUT1L 31 LEFT ELECTRET CONDENSER MIC INPUT L VOLUME CONTROL 220F 16 + 1/2 OP213 10k + 20 HEADPHONE LEFT 47k RIGHT ELECTRET CONDENSER MIC INPUT 5V AD1849 1/2 VREF 10F + - 100 10k 50 + 1/2 OP213 15 MINR - 10k 00286-049 VREF OPTIONAL GAIN 1k - Figure 50. Low Noise Stereo Microphone Amplifier for Multimedia Sound Codec OP213 + PRECISION VOLTAGE COMPARATOR CMOUT 19 - 10k 1/2 OP213 LOUT1R 29 + 5k OPTIONAL GAIN 00286-048 1k HEADPHONE RIGHT 47k 10F R VOLUME CONTROL 220F 16 + VREF Figure 49. Headphone Output Amplifier for Multimedia Sound Codec LOW NOISE MICROPHONE AMPLIFIER FOR MULTIMEDIA The OPx13 family is ideally suited as a low noise microphone preamp for low voltage audio applications. Figure 50 shows a gain of 100 stereo preamp for the AD1849 16-bit SOUNDPORT stereo codec chip. The common-mode output buffer serves as a phantom power driver for the microphones. With its PNP inputs and 0 V common-mode capability, the OPx13 family can make useful voltage comparators. There is only a slight penalty in speed in comparison to IC comparators. However, the significant advantage is its voltage accuracy. For example, VOS can be a few hundred microvolts or less, combined with CMRR and PSRR exceeding 100 dB, while operating from a 5 V supply. Standard comparators like the 111/311 family operate on 5 V, but not with common mode at ground, nor with offset below 3 mV. Indeed, no commercially available singlesupply comparator has a VOS less than 200 V. 1 SOUNDPORT is a registered trademark of Analog Devices, Inc. Rev. F | Page 17 of 24 OP113/OP213/OP413 Figure 51 shows the OPx13 family response to a 10 mV overdrive signal when operating in open loop. The top trace shows the output rising edge has a 15 s propagation delay, whereas the bottom trace shows a 7 s delay on the output falling edge. This ac response is quite acceptable in many applications. 10mV OVERDRIVE 5V The low noise and 250 V (maximum) offset voltage enhance the overall dc accuracy of this type of comparator. Note that zerocrossing detectors and similar ground referred comparisons can be implemented even if the input swings to -0.3 V below ground. +IN +2.5V 25k 0V -2.5V 100 tr = tf = 5ms 2V + 9V 9V OUT 1/2 -IN OP113 - 5s 00286-051 100 90 Figure 52. OP213 Simplified Schematic 2V 00286-050 10 0% Figure 51. Precision Comparator Rev. F | Page 18 of 24 OP113/OP213/OP413 OUTLINE DIMENSIONS 0.400 (10.16) 0.365 (9.27) 0.355 (9.02) 8 5 1 4 0.280 (7.11) 0.250 (6.35) 0.240 (6.10) 0.100 (2.54) BSC 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.060 (1.52) MAX 0.210 (5.33) MAX 0.015 (0.38) MIN 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) SEATING PLANE 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) 0.015 (0.38) GAUGE PLANE 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.430 (10.92) MAX 0.005 (0.13) MIN 0.070 (1.78) 0.060 (1.52) 0.045 (1.14) 070606-A COMPLIANT TO JEDEC STANDARDS MS-001 CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. CORNER LEADS MAY BE CONFIGURED AS WHOLE OR HALF LEADS. Figure 53. 8-Lead Plastic Dual In-Line Package [PDIP] Narrow Body P-Suffix (N-8) Dimensions shown in inches and (millimeters) 5.00 (0.1968) 4.80 (0.1890) 1 5 6.20 (0.2441) 5.80 (0.2284) 4 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) 0.51 (0.0201) 0.31 (0.0122) 0.50 (0.0196) 0.25 (0.0099) 45 8 0 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 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 54. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body S-Suffix (R-8) Dimensions shown in millimeters and (inches) Rev. F | Page 19 of 24 012407-A 8 4.00 (0.1574) 3.80 (0.1497) OP113/OP213/OP413 10.50 (0.4134) 10.10 (0.3976) 9 16 7.60 (0.2992) 7.40 (0.2913) 8 1.27 (0.0500) BSC 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122) 10.65 (0.4193) 10.00 (0.3937) 0.75 (0.0295) 0.25 (0.0098) 2.65 (0.1043) 2.35 (0.0925) SEATING PLANE 45 8 0 0.33 (0.0130) 0.20 (0.0079) COMPLIANT TO JEDEC STANDARDS MS-013- 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. 1.27 (0.0500) 0.40 (0.0157) 030707-B 1 Figure 55. 16-Lead Standard Small Outline Package [SOIC_W] Wide Body S-Suffix (RW-16) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model OP113ES OP113ES-REEL OP113ES-REEL7 OP113ESZ1 OP113ESZ-REEL1 OP113ESZ-REEL71 OP113FS OP113FS-REEL OP113FS-REEL7 OP113FSZ1 OP113FSZ-REEL1 OP113FSZ-REEL71 OP213ES OP213ES-REEL OP213ES-REEL7 OP213ESZ1 OP213ESZ-REEL1 OP213ESZ-REEL71 OP213FP OP213FPZ1 OP213FS OP213FS-REEL OP213FS-REEL7 OP213FSZ1 OP213FSZ-REEL1 OP213FSZ-REEL71 Temperature Range -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C Package Description 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead PDIP 8-Lead PDIP 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N Rev. F | Page 20 of 24 Package Options R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) N-8 (P-Suffix) N-8 (P-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) R-8 (S-Suffix) OP113/OP213/OP413 Model OP413ES OP413ES-REEL OP413ESZ1 OP413ESZ-REEL1 OP413FS OP413FS-REEL OP413FSZ1 OP413FSZ-REEL1 1 Temperature Range -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C Package Description 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W 16-Lead Wide Body SOIC_W Z = RoHS Compliant Part. Rev. F | Page 21 of 24 Package Options RW-16 (S-Suffix) RW-16 (S-Suffix) RW-16 (S-Suffix) RW-16 (S-Suffix) RW-16 (S-Suffix) RW-16 (S-Suffix) RW-16 (S-Suffix) RW-16 (S-Suffix) OP113/OP213/OP413 NOTES Rev. F | Page 22 of 24 OP113/OP213/OP413 NOTES Rev. F | Page 23 of 24 OP113/OP213/OP413 NOTES (c)1993-2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00286-0-3/07(F) Rev. F | Page 24 of 24