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Low Noise, Low Drift Single-Supply Operational Amplifiers OP113/OP213/OP413
FEATURES
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
NULL -IN A +IN A V-
1 2 3 4
PIN CONFIGURATIONS
8
NC V+ OUT A
00286-001
OUT A -IN A +IN A V-
1 2 3 4
8
V+ OUT B
00286-002 00286-004
TOP VIEW (Not to Scale)
OP113
7 6 5
TOP VIEW (Not to Scale)
OP213
7 6 5
-IN B +IN B
NULL
NC = NO CONNECT
Figure 1. 8-Lead Narrow-Body SOIC_N
Figure 2. 8-Lead Narrow-Body SOIC_N
OUT A -IN A
1 2 3 4 5 6 7 8 16 15
APPLICATIONS
Digital scales Multimedia Strain gages Battery-powered instrumentation Temperature transducer amplifier
OUT D -IN D +IN D V- +IN C -IN C OUT C NC
OUT A -IN A +IN A V-
1 2 3 4
OP213
8 7 6 5
V+ OUT B
00286-003
+IN A V+ +IN B -IN B OUT B NC
TOP VIEW (Not to Scale)
OP413
14 13 12 11 10 9
-IN B +IN B
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.
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.
OP113/OP213/OP413 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 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 Application Circuits ....................................................................... 14 A High Precision Industrial Load-Cell Scale Amplifier........ 14 A Low Voltage, Single Supply Strain Gage Amplifier............ 14 A High Accuracy Linearized RTD Thermometer Amplifier ..................................................................................... 14 A High Accuracy Thermocouple Amplifier........................... 15 An Ultralow Noise, Single Supply Instrumentation Amplifier ..................................................................................... 15 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
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 INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions OP113 -40C TA +85C OP213 -40C TA +85C OP413 -40C TA +85C VCM = 0 V -40C TA +85C VCM = 0 V -40C TA +85C -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 -15 100 97 Min Typ Max 75 125 100 150 125 175 600 700 50 +14 116 116 Min F Grade Typ Max 150 225 250 325 275 350 600 700 50 +14 Unit V V V V V V nA nA nA V dB dB
Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection
IB IOS VCM CMR
240
-15 96 94
Large-Signal Voltage Gain
AVO
1 1 2
2.4 2.4 8 0.2 150 0.8
1 1 2 300 1.5 14 13.9 -14.5 -14.5 -14.5 -14.5 40 100 97 3 3.8 18 3 3.8 18
V/V V/V V/V V V/C V V V V mA dB dB mA mA V
Long-Term Offset Voltage1 Offset Voltage Drift2 OUTPUT CHARACTERISTICS Output Voltage Swing High
VOS VOS/T VOH RL = 2 k RL = 2 k, -40C TA +85C RL = 2 k RL = 2 k, -40C TA +85C 14 13.9
Output Voltage Swing Low
VOL
Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio
ISC PSRR 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 103 100
40 120 120
Supply Current/Amplifier
ISY
Supply Voltage Range
VS
4
4
Rev. F | Page 3 of 24
OP113/OP213/OP413
Parameter 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
Symbol
Conditions 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 VOUT = 10 V p-p RL = 2 k, f = 1 kHz to 0.01%, 0 V to 10 V step
Min
E Grade Typ Max
Min
F Grade Typ Max
Unit
en in en p-p SR GBP
0.0009 9 4.7 0.4 120 0.8 1.2 3.4 105 9 0.8
0.0009 9 4.7 0.4 120 1.2 3.4 105 9
% nV/Hz nV/Hz pA/Hz nV p-p V/s MHz dB s
tS
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 INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions 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 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 0 93 90 Min E Grade Typ Max 125 175 150 225 175 250 650 750 50 4 106 90 87 Min F Grade Typ Max 175 250 300 375 325 400 650 750 50 4 Unit V V V V V V nA nA nA V dB dB
Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection
IB IOS VCM CMR
300
Large-Signal Voltage Gain
AVO
2 1 200 0.2 1.0
2 1 350 1.5
V/V V/V V V/C
Long-Term Offset Voltage1 Offset Voltage Drift2
VOS VOS/T
Rev. F | Page 4 of 24
OP113/OP213/OP413
Parameter OUTPUT CHARACTERISTICS Output Voltage Swing High Symbol VOH Conditions 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 Min 4.0 4.1 3.9 8 8 30 1.6 2.7 3.0 0.001 9 4.7 0.45 120 0.6 0.9 3.5 5.8 0.6 3.5 5.8 0.001 9 4.7 0.45 120 8 30 2.7 3.0 E Grade Typ Max Min 4.0 4.1 3.9 8 F Grade Typ Max Unit V V V mV mV mA mA mA % nV/Hz nV/Hz pA/Hz nV p-p V/s MHz s
Output Voltage Swing Low
VOL
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
ISC ISY ISY VOUT = 2.0 V, no load -40C TA +85C VOUT = 0 dBu, f = 1 kHz f = 10 Hz f = 1 kHz f = 1 kHz 0.1 Hz to 10 Hz RL = 2 k to 0.01%, 2 V step
en in en p-p SR GBP tS
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
OP113/OP213/OP413 ABSOLUTE MAXIMUM RATINGS
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
THERMAL RESISTANCE
Table 4. Thermal Resistance
Package Type 8-Lead PDIP (P) 8-Lead SOIC_N (S) 16-Lead SOIC_W (S) JA 103 158 92 JC 43 43 27 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.
Rev. F | Page 6 of 24
OP113/OP213/OP413 TYPICAL PERFORMANCE CHARACTERISTICS
100 VS = 15V TA = 25C 400 x OP AMPS PLASTIC PACKAGE
150 VS = 15V -40C TA +85C 400 x OP AMPS PLASTIC PACKAGE
80
120
60
90
UNITS
40
UNITS
60
20
00286-005
30
00286-008
0 -50
-40
-30 -20 -10 0 10 20 30 INPUT OFFSET VOLTAGE, VOS (V)
40
50
0
0
0.1
0.2
0.3
0.4 0.5 0.6 TCVOS (V)
0.7
0.8
0.9
1.0
Figure 5. OP113 Input Offset (VOS) Distribution @ 15 V
500 VS = 15V TA = 25C 896 x OP AMPS PLASTIC PACKAGE
Figure 8. OP113 Temperature Drift (TCVOS) Distribution @ 15 V
500 VS = 15V -40C TA +85C 896 x OP AMPS PLASTIC PACKAGE
400
400
300
300
UNITS
200
UNITS
200
100
00286-006
100
00286-009
0 -100
-80
-60
-40
-20
0
20
40
60
80
100
0
0
0.1
0.2
0.3
INPUT OFFSET VOLTAGE, VOS (V)
0.4 0.5 0.6 TCVOS (V)
0.7
0.8
0.9
1.0
Figure 6. OP213 Input Offset (VOS) Distribution @ 15 V
500 VS = 15V TA = 25C 1220 x OP AMPS PLASTIC PACKAGE
Figure 9. OP213 Temperature Drift (TCVOS) Distribution @ 15 V
600 VS = 15V -40C TA +85C 1220 x OP AMPS PLASTIC PACKAGE
400
500
400
300
UNITS
UNITS
300
200
200
100
00286-007
100
00286-010
0 -60
0
-40
-20 0 20 40 60 80 100 INPUT OFFSET VOLTAGE, VOS (V)
120
140
0
0.1
0.2
0.3
0.4 0.5 0.6 TCVOS (V)
0.7
0.8
0.9
1.0
Figure 7. OP413 Input Offset (VOS) Distribution @ 15 V
Figure 10. OP413 Temperature Drift (TCVOS) Distribution @ 15 V
Rev. F | Page 7 of 24
OP113/OP213/OP413
1000
500
800
INPUT BIAS CURRENT (nA)
400
INPUT BIAS CURRENT (nA)
VCM = 0V
VS = +5V 300 VS = 15V 200
600 VS = +5V VCM = +2.5V
400
200
00286-011
0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
Figure 11. OP113 Input Bias Current vs. Temperature
5.0 VS = 5V
NEGATIVE OUTPUT SWING (mV) POSITIVE OUTPUT SWING (V)
Figure 14. OP213 Input Bias Current vs. Temperature
2.0
15.0 14.5 VS = 15V +SWING RL = 2k
4.5 +SWING RL = 2k 4.0 +SWING RL = 600 -SWING RL = 2k
1.5
POSITIVE OUTPUT SWING (V)
14.0 13.5 13.0 12.5 +SWING RL = 600
1.0
-13.5 -14.0 -14.5 -SWING RL = 600
3.5 -SWING RL = 600 3.0 -75 -50 -25 0 25 50 TEMPERATURE (C) 75 100
0.5
-SWING RL = 2k
00286-012
0 125
-15.0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
Figure 12. Output Swing vs. Temperature and RL @ 5 V
60 40 VS = 15V TA = 25C
Figure 15. Output Swing vs. Temperature and RL @ 15 V
20 18 16 VS = 5V VO = 3.9V
CHANNEL SEPARATION (dB)
20
OPEN-LOOP GAIN (V/V)
0 -20 -40 -60 -80 -100 -120 10 100 1k 10k 100k FREQUENCY (Hz) 1M 105
00286-013
14 12 10 8 6 4 2 0 -75 -50 -25
RL = 2k
RL = 600
10M
0 25 50 TEMPERATURE (C)
75
100
125
Figure 13. Channel Separation
Figure 16. Open-Loop Gain vs. Temperature @ 5 V
Rev. F | Page 8 of 24
00286-016
00286-015
00286-014
VS = 15V VCM = 0V
100
OP113/OP213/OP413
12.5 RL = 2k 10.0 VS = 15V VD = 10V
OPEN-LOOP GAIN (V/V)
10 9 8 7 6 5 4 3 2
00286-017
VS = 15V VO = 10V
OPEN-LOOP GAIN (V/V)
RL = 2k
7.5 RL = 1k 5.0 RL = 600 2.5
RL = 600
00286-020
1 0 -75 -50 -25 0 25 50 TEMPERATURE (C) 75 100
0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
125
Figure 17. OP413 Open-Loop Gain vs. Temperature
100 100 V+ = 5V V- = 0V TA = 25C
Figure 20. OP213 Open-Loop Gain vs. Temperature
TA = 25C VS = 15V 0 80 0
80
OPEN-LOOP GAIN (dB)
OPEN-LOOP GAIN (dB)
PHASE (Degrees)
GAIN
GAIN 40 PHASE 20 m = 72
40 PHASE 20 m = 57
90
90
135
135
0
180
0
180
00286-018
10k
100k FREQUENCY (Hz)
1M
10k
100k FREQUENCY (Hz)
1M
Figure 18. Open-Loop Gain, Phase vs. Frequency @ 5 V
50 40 AV = 100
CLOSED-LOOP GAIN (dB)
Figure 21. Open-Loop Gain, Phase vs. Frequency @ 15 V
50 40 AV = 100 TA = 25C VS = 15V
V+ = 5V V- = 0V TA = 25C
CLOSED-LOOP GAIN (dB)
30 20 AV = 10 10 0 AV = 1
00286-019
30 20 AV = 10 10 0 AV = 1
00286-052
-10 -20 1k
-10 -20 1k
10k
100k FREQUENCY (Hz)
1M
10M
10k
100k FREQUENCY (Hz)
1M
10M
Figure 19. Closed-Loop Gain vs. Frequency @ 5 V
Figure 22. Closed-Loop Gain vs. Frequency @ 15 V
Rev. F | Page 9 of 24
00286-021
-20 1k
225 10M
-20 1k
225 10M
PHASE (Degrees)
60
45
60
45
OP113/OP213/OP413
70 V+ = 5V V- = 0V
GAIN BANDWIDTH PRODUCT (MHz)
5
70 VS = 15V
5
PHASE MARGIN (Degrees)
GBW 60 m 3
PHASE MARGIN (Degrees)
65
4
65
GBW
4
m 60 3
55
2
55
2
-50
-25
0 25 50 TEMPERATURE (C)
75
100
00286-022
-50
-25
0 25 50 TEMPERATURE (C)
75
100
Figure 23. Gain Bandwidth Product and Phase Margin vs. Temperature @ 5 V
30 TA = 25C VS = 15V
Figure 26. Gain Bandwidth Product and Phase Margin vs. Temperature @ 15 V
3.0 TA = 25C VS = 15V
CURRENT NOISE DENSITY (pA/ Hz)
VOLTAGE NOISE DENSITY (nV/ Hz)
25
2.5
20
2.0
15
1.5
10
1.0
5
00286-023
0.5
00286-026
0
1
10 FREQUENCY (Hz)
100
1k
0
1
10 FREQUENCY (Hz)
100
1k
Figure 24. Voltage Noise Density vs. Frequency
140 120 V+ = 5V V- = 0V TA = 25C
Figure 27. Current Noise Density vs. Frequency
140 120 COMMON-MODE REJECTION (dB) 100 80 60 40 20 0 100 TA = 25C VS = 15V
COMMON-MODE REJECTION (dB)
100 80 60 40 20 0 100
00286-024
1k
10k FREQUENCY (Hz)
100k
1M
1k
10k FREQUENCY (Hz)
100k
1M
Figure 25. Common-Mode Rejection vs. Frequency @ 5 V
Figure 28. Common-Mode Rejection vs. Frequency @ 15 V
Rev. F | Page 10 of 24
00286-027
00286-025
50 -75
1 125
50 -75
1 125
GAIN BANDWIDTH PRODUCT (MHz)
OP113/OP213/OP413
140 120 100 80 60 -PSRR 40 20
00286-028
40
TA = 25C VS = 15V
30
IMPEDANCE ()
TA = 25C VS = 15V
POWER SUPPLY REJECTION (dB)
+PSRR
20
10
AV = 100 AV = 10
00286-031
AV = 1 0 100 1k 10k FREQUENCY (Hz) 100k
0 100
1k
10k FREQUENCY (Hz)
100k
1M
1M
Figure 29. Power Supply Rejection vs. Frequency @ 15 V
6 VS = 5V RL = 2k TA = 25C AVCL = 1
Figure 32. Closed-Loop Output Impedance vs. Frequency @ 15 V
30 VS = 15V RL = 2k TA = 25C AVOL = 1
5
MAXIMUM OUTPUT SWING (V)
25
MAXIMUM OUTPUT SWING (V)
4
20
3
15
2
10
1
00286-029
5
00286-032
0 1k
10k
100k FREQUENCY (Hz)
1M
10M
0 1k
10k
100k FREQUENCY (Hz)
1M
10M
Figure 30. Maximum Output Swing vs. Frequency @ 5 V
50 45 40 35
OVERSHOOT (%)
Figure 33. Maximum Output Swing vs. Frequency @ 15 V
20 VS = 15V RL = 2k VIN = 100mV p-p TA = 25C AVCL = 1
VS = 5V RL = 2k VIN = 100mV p-p TA = 25C AVCL = 1
OVERSHOOT (%)
18 16 14 12 10 8 6 4
00286-030
POSITIVE EDGE
30 25 20 15 10 5 0 0 100 200 300 LOAD CAPACITANCE (pF) 400 POSITIVE EDGE NEGATIVE EDGE
NEGATIVE EDGE
2 0 0 100 200 300 LOAD CAPACITANCE (pF) 400
500
500
Figure 31. Small-Signal Overshoot vs. Load Capacitance @ 5 V
Figure 34. Small-Signal Overshoot vs. Load Capacitance @ 15 V
Rev. F | Page 11 of 24
00286-033
OP113/OP213/OP413
2.0 VS = 5V 0.5V VOUT 4.0V
2.0 VS = 15V -10V VOUT +10V 1.5 +SLEW RATE
1.5
SLEW RATE (V/s)
1.0 -SLEW RATE 0.5
00286-034
SLEW RATE (V/s)
+SLEW RATE
-SLEW RATE
1.0
0.5
00286-037
0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
Figure 35. Slew Rate vs. Temperature @ 5 V (0.5 V VOUT 4.0 V)
Figure 38. Slew Rate vs. Temperature @ 15 V (-10 V VOUT +10.0 V)
1s
100 90
100 90
1s
10
10 0%
00286-035
0%
20mV
20mV
Figure 36. Input Voltage Noise @ 15 V (20 nV/div)
5
Figure 39. Input Voltage Noise @ 5 V (20 nV/div)
4
SUPPLY CURRENT (mA)
909 100 0.1Hz TO 10Hz AV = 1000
VS = 18V 3
VS = 15V VS = +5V
2
00286-036
AV = 100
tOUT
1
00286-039
0 -75
-50
-25
0 25 50 TEMPERATURE (C)
75
100
125
Figure 37. Noise Test Diagram
Figure 40. Supply Current vs. Temperature
Rev. F | Page 12 of 24
00286-038
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
A HIGH PRECISION INDUSTRIAL LOAD-CELL SCALE AMPLIFIER
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 R5 1k +10V
2 1 3 9 4 6 11 12 13 7 16 14
5V
2 8
2N2222A
1
OP295
4
1/2
+3 -2
2.5V
IN
6 OUT
REF43
4
GND
4V 350 35mV FS R8 12k R7 20k
5+ 6- 3+
5V
8
OP295
4
1/2
OUTPUT 0V 3.5V
7
-15V
OP213
2-
1/2
1
R3 20k R4 100k
8 1
2N2219A
+10V R3 17.2k 0.1% R4 500
+ 10F
RG = 2127.4
Figure 42. Single Supply Strain Gage Amplifier
350 LOAD CELL 100mV F.S.
6-
CMRR TRIM 10-TURN T.C. LESS THAN 50ppm/C OUTPUT 0 10V FS
A HIGH ACCURACY LINEARIZED RTD THERMOMETER AMPLIFIER
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.
A1
5+ 4
7
1/2
OP213
-15V R1 17.2k 0.1% R2 301 0.1%
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.
Rev. F | Page 14 of 24
00286-040
00286-041
OP213
1/2
+3 A2 -2
R2 20k
AD588BQ
15 8 10
R1 100k
R5 2.1k
R6 27.4
OP113/OP213/OP413
-15V
16 11 12 13 4 6 7 9 8 10 14 15 1 3
+15V
12V
2
0.1F
+
2 REF02EZ 4
6
5V R1 10.7k R5 40.2k R9 124k 12V 10F + 0.1F R2 2.74k R8 453 +
2- 8
AD588BQ
1N4148 D1
R3 50 R1 8.25k
RG FULL SCALE ADJUST R2 8.25k R5 R7 4.02k 100 +15V
6- 8 7
10F
+
K-TYPE THERMOCOUPLE 40.7V/C
- +
- +
RW1 100 RTD R4 100 RW2
A2 5+ 4
OP213
R8 49.9k
1/2
VOUT (10mV/C) -1.5V = -150C +5V = +500C R9 5k LINEARITY ADJUST @1/2 FS
Figure 44. Accurate K-Type Thermocouple Amplifier
-15V RW3
2-
A1
3+
1
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.
OP213
1/2
00286-042
Figure 43. Ultraprecision RTD Amplifier
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 + VIN - + - + - 1/2
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. 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. 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.
OP213 OP213
*R1 10k *R2 10k *R3 10k *R4 10k 1/2
VOUT
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.
*ALL RESISTORS 0.1%, 25ppm/C.
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
00286-044
*RG (200 + 12.7)
GAIN =
20k +6 RG
00286-043
R4 5.62k
R6 200 R3 53.6
OP213
3+ 4
1/2
1
0V TO 10V (0C TO 1000C)
OP113/OP213/OP413
VS+ = 5V 12V R3 2.5k
5V 5V - 10F +
2
C1 0.1F R1 5k
2
2
-
8
IN
-
8
OUT 6
1
10k
10k
3
OP213
+ C2 10F
1/2
1
OUTPUT 2.5V
+
OP213
3
+
+
00286-045
R2 5k
4
C2 1F
2
OUTPUT
GND
4
Figure 47. Low Noise Voltage Reference
5 V ONLY STEREO DAC FOR MULTIMEDIA
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.
Figure 46. False Ground Generator
LOW NOISE VOLTAGE REFERENCE
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
1 2
18-BIT LL DAC 18-BIT DL SERIAL REG. CK DR 18-BIT LR SERIAL REG. DGND 18-BIT DAC VBR
VL
VBL - + V OL
16 3 15
+ -
8
3
14
7.68k 330pF +
9.76k
OP213
2 4
1/2
220F
1
+- 47k
LEFT CHANNEL OUTPUT
4 5 6
VREF
13
100pF 7.68k 7.68k
AGND 12 VREF V OR - +
11
7 8
10
100pF 7.68k 9.76k
6
VS
9
330pF
+
-
OP213
5
1/2
220F
7
+- 47k
Figure 48. 5 V Only 18-Bit Stereo DAC
Rev. F | Page 16 of 24
00286-047
+
RIGHT CHANNEL OUTPUT
00286-046
1/2
R4 100
VS+
REF43
4
3V p-p NOISE
OP113/OP213/OP413
LOW VOLTAGE HEADPHONE AMPLIFIERS
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.
VREF 10F LOUT1L 31 10k - L VOLUME CONTROL + OPTIONAL GAIN 1k 5k 5V 1/2 220F 16 + 47k
20 - LEFT ELECTRET CONDENSER MIC INPUT 10F + 20 50 + 100 10k 5V 1/2
OP213
17 MINL
10k 5V 1/2 - + 10k 50
AD1849
19 CMOUT
OP213
100
OP213
HEADPHONE LEFT
RIGHT ELECTRET CONDENSER MIC INPUT
10F +
+ -
OP213
1/2
15 MINR
00286-049
AD1849
VREF
5V - +
10k
OP213
1/2
Figure 50. Low Noise Stereo Microphone Amplifier for Multimedia Sound Codec
PRECISION VOLTAGE COMPARATOR
CMOUT 19 10k LOUT1R 29 10F R VOLUME CONTROL 1k 5k
00286-048
- +
OP213
1/2
220F 16 + 47k
HEADPHONE RIGHT
OPTIONAL GAIN
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 +2.5V 0V -2.5V 25k 100 + 9V 9V 1/2 OUT -IN 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
OP113
-
tr = tf = 5ms
2V
100 90
5s
Figure 52. OP213 Simplified Schematic
10 0%
00286-050
2V
Figure 51. Precision Comparator
Rev. F | Page 18 of 24
00286-051
OP113/OP213/OP413 OUTLINE DIMENSIONS
0.400 (10.16) 0.365 (9.27) 0.355 (9.02)
8 1 5
4
0.280 (7.11) 0.250 (6.35) 0.240 (6.10)
0.100 (2.54) BSC 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.070 (1.78) 0.060 (1.52) 0.045 (1.14) 0.015 (0.38) MIN SEATING PLANE 0.005 (0.13) MIN
0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.060 (1.52) MAX 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
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)
8
5 4
4.00 (0.1574) 3.80 (0.1497)
1
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 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
070606-A
OP113/OP213/OP413
10.50 (0.4134) 10.10 (0.3976)
16
9
7.60 (0.2992) 7.40 (0.2913)
1 8
10.65 (0.4193) 10.00 (0.3937)
1.27 (0.0500) BSC 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122)
2.65 (0.1043) 2.35 (0.0925)
0.75 (0.0295) 0.25 (0.0098)
8 0 0.33 (0.0130) 0.20 (0.0079)
45
SEATING PLANE
1.27 (0.0500) 0.40 (0.0157)
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.
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 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)
Rev. F | Page 20 of 24
030707-B
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
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)
Z = RoHS Compliant Part.
Rev. F | Page 21 of 24
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

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