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OUT A
1
–IN A
2
+IN A
3
V+
4
OUT D
–IN D
+IN D
V–
14
13
12
11
+IN B
5
–IN B
6
OUT B
7
+IN C
–IN C
OUT C
10
9
8
00304-001
OP400
+
–
+
–
+
–
+
–
OUTA
1
–IN A
2
+IN A
3
V+
4
OUT D
–IN D
+IN D
V–
16
15
14
13
+IN B
5
–IN B
6
OUT B
7
+IN C
–IN C
OUT C
12
1
1
10
NC
8
NC
9
00304-002
OP400
NC = NO CONNECT
+
–
+
–
+
–
+
–
Suffix)
VOLTAGE
LIMITING
NETWORK
+IN–IN
V–
OUT
V+
BIAS
00304-003
Data Sheet
FEATURES
Low input offset voltage: 150 µV maximum
Low offset voltage drift over –55°C to +125°C: 1.2 μV/°C
maximum
Low supply current (per amplifier): 725 µA maximum
High open-loop gain: 5000 V/mV minimum
Input bias current: 3 nA maximum
Low noise voltage density: 11 nV/√Hz at 1 kHz
Stable with large capacitive loads: 10 nF typical
Available in die form
GENERAL DESCRIPTION
The OP400 is the first monolithic quad operational amplifier
that features OP77-type performance. Precision performance is
not sacrificed with the OP400 to obtain the space and cost
savings offered by quad amplifiers.
The OP400 features an extremely low input offset voltage of less
than 150 µV with a drift of less than 1.2 µV/°C, guaranteed over
the full military temperature range. Open-loop gain of the
OP400 is more than 5 million into a 10 kΩ load, input bias
current is less than 3 nA, CMR is more than 120 dB, and PSRR
is less than 1.8 µV/V. On-chip Zener zap trimming is used to
achieve the low input offset voltage of the OP400 and eliminates
the need for offset nulling. The OP400 conforms to the industrystandard quad pinout, which does not have null terminals.
Quad Low Offset, Low Power
FUNCTIONAL BLOCK DIAGRAMS
Figure 1. 14-Pin Ceramic DIP (Y-
and 14-Pin Plastic DIP (P-Suffix)
The OP400 features low power consumption, drawing less than
725 µA per amplifier. The total current drawn by this quad
amplifier is less than that of a single OP07, yet the OP400 offers
significant improvements over this industry-standard op amp.
Voltage noise density of the OP400 is a low 11 nV/√Hz at
10 Hz, half that of most competitive devices.
The OP400 is an ideal choice for applications requiring multiple
precision operational amplifiers and where low power
consumption is critical.
Figure 2. 16-Pin SOIC (S-Suffix)
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.
Figure 3. Simplified Schematic (One of Four Amplifiers Is Shown)
• AN-256: Accurately Testing Op Amp Settling Times
• AN-357: Operational Integrators
• AN-649: Using the Analog Devices Active Filter Design
Tool
Data Sheet
• OP400: Quad Low Offset, Low Power Operational
Amplifier Data Sheet
• OP400: Military Data Sheet
Tools and Simulations
• OP400 SPICE Macro-Model
Last Content Update: 08/30/2016
Reference Materials
Analog Dialogue
• Ask The Applications Engineer - 25 Op Amps Driving
Capacitive Loads
Design Resources
• OP400 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all OP400 EngineerZone Discussions
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Technical Support
Submit a technical question or find your regional support
number
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.
Page 3
OP400 Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
SMD Parts and Equivalents ...................................................... 15
6/03—Rev. B to Rev. C
Edits to Specifications ....................................................................... 2
10/02—Rev. A to Rev. B
Addition of Absolute Maximum Ratings ....................................... 5
Edits to Outline Dimensions......................................................... 12
4/02—Rev. 0 to Rev. A
Edits to Features................................................................................. 1
Edits to Ordering Information ........................................................ 1
Edits to Pin Connections .................................................................. 1
Edits to General Descriptions ..................................................... 1, 2
Edits to Package Type ....................................................................... 2
Rev. H | Page 2 of 16
Page 4
Data Sheet OP400
Parameter
Symbol
Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
INPUT CHARACTERISTICS
Input Offset Voltage
VOS
40
150 60
230 80
300
µV
Input Capacitance
C
3.2
3.2
3.2 pF
Power Supply Rejection
PSRR
VS = 3 V to 18 V
0.1
1.8 0.1
3.2 0.2
5.6
µV/V
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
@ VS = ±15 V, TA = +25°C, unless otherwise noted.
Table 1.
OP400A/E OP400F OP400G/H
Long-Term Input
0.1 0.1 0.1 µV/mo
Voltage Stability
Input Offset Current IOS VCM = 0 V 0.1 1.0 0.1 2.0 0.1 3.5 nA
Input Bias Current IB VCM = 0 V 0.75 3.0 0.75 6.0 0.75 7.0 nA
Input Noise Voltage e
Input Resistance
Input Voltage Range1 IVR ±12 ±13 ±12 ±13 ±12 ±13 V
Common-Mode
CMR VCM = 12 V 120 140 115 140 110 135 dB
Rejection
IN
OUTPUT
CHARACTERISTICS
Output Voltage Swing VO RL = 10 kΩ ±12 ±12.6 ±12 ±12.6 ±12 ±12.6 V
POWER SUPPLY
Ratio
Supply Current per
ISY No load 600 725 600 725 600 725 µA
Amplifier
DYNAMIC PERFORMANCE
Slew Rate SR 0.1 0.15 0.1 0.15 0.1 0.15 V/µs
Gain Bandwidth
GBWP AV = 1 500 500 500 kHz
Product
Channel Separation CS VO = 20 V p-p, 123 135 123 135 123 135 dB
fO = 10 Hz2
Capacitive Load
Stability
AV = 1,
no oscillations
10 10 10 nF
NOISE PERFORMANCE
Input Noise Voltage en fO = 10 Hz3 22 36 22 36 22 nV/√Hz
Density3 fO = 1000 Hz3 11 18 11 18 11 nV/√Hz
Input Noise Current i
Input Noise Current
0.1 Hz to 10 Hz 15 15 15 pA p-p
n p-p
in fO = 10 Hz 0.6 0.6 0.6 pA/√Hz
Density
1
Guaranteed by CMR test.
2
Guaranteed but not 100% tested.
3
Sample tested.
Rev. H | Page 3 of 16
Page 5
OP400 Data Sheet
Input Offset Current
IOS
VCM = 0 V
0.1
2.5
nA
Common-Mode Rejection
CMR
VCM = ±12 V
115
130
dB
H grade
1.0
20.0
nA
DYNAMIC PERFORMANCE
@ VS = ±15 V, −55°C ≤ TA ≤ +125°C for OP400A, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Input Offset Voltage VOS 70 270 µV
Average Input Offset Voltage Drift TCVOS 0.3 1.2 µV/°C
Input Bias Current IB VCM = 0 V 1.3 5.0 nA
Large Signal Voltage Gain AVO VO = ±10 V, RL = 10 kΩ 3000 9000 V/mV
RL = 2 kΩ 1000 2300
Input Voltage Range1 IVR ±12 ±12.5 V
OUTPUT CHARACTERISTICS
Output Voltage Swing VO RL = 10 kΩ ±12 ±12.4
POWER SUPPLY
Power Supply Rejection Ratio PSRR VO = 3 V to 18 V 0.2 3.2 µV/V
Supply Current per Amplifier ISY No load 600 775 µA
DYNAMIC PERFORMANCE
Capacitive Load Stability AV = 1, no oscillations 8 nF
1
Guaranteed by CMR test.
@ V
= ±15 V, −25°C ≤ TA ≤ +85°C for OP400E/F, 0°C ≤ TA ≤ 70°C for OP400G, −40°C ≤ TA ≤ +85°C for OP400H, unless otherwise noted.
S
Table 3.
OP400E OP400F OP400G/H
Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Unit
INPUT CHARACTERISTICS
Input Offset Voltage VOS 60 220 80 350 110 400 µV
Average Input Offset
TCVOS 0.3 1.2 0.3 2.0 0.6 2.5 µV/°C
Voltage Drift
Input Offset Current IOS VCM = 0 V E, F, G grades 0.1 2.5 0.1 3.5 0.2 6.0 nA
H grade 0.2 12.0 nA
Input Bias Current IB VCM = 0 V E, F, G grades 0.9 5.0 0.9 10.0 1.0 12.0 nA
Large-Signal Voltage Gain AVO VCM = 0 V RL = 10 kΩ 3000 10,000 2000 5000 2000 5000 V/mV
RL = 2 kΩ 1500 2700 1000 2000 1000 2000 V/mV
Input Voltage Range1 IVR ±12 ±12.5 ±12 ±12.5 ±12 ±12.5 V
Common-Mode Rejection CMR VCM = ±12 V 115 135 110 135 105 130 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing VO RL = 10 kΩ ±12 ±12.4 ±12 ±12.4 ±12 ±12.6 V
RL = 2 kΩ ±11 ±12 ±11 ±12 ±11 ±12.2 V
POWER SUPPLY
Power Supply Rejection
Ratio
Supply Current per
PSRR VS = ±3 V to
0.15 3.2 0.15 5.6 0.3 10.0 µV/V
±18 V
ISY No load 600 775 600 775 600 775 µA
Amplifier
Capacitive Load Stability No oscillations 10 10 10 nF
1
Guaranteed by CMR test.
Rev. H | Page 4 of 16
Page 6
Data Sheet OP400
Junction Temperature (TJ) Range
−65°C to +150°C
OP400H
−40°C to +85°C
ABSOLUTE MAXIMUM RATINGS
Table 4.
Parameter Rating
Supply Voltage ±20 V
Differential Input Voltage ±30 V
Input Voltage Supply voltage
Output Short-Circuit Duration Continuous
Storage Temperature Range
P, Y, S Packages −65°C to +150°C
Lead Temperature (Soldering 60 sec) 300°C
Operating Temperature Range
OP400A −55°C to +125°C
OP400E, OP400F −25°C to +85°C
OP400G 0°C to 70°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Absolute maximum ratings apply to both dice and packaged
parts, unless otherwise noted.
THERMAL RESISTANCE
θJA is specified for worst-case mounting conditions, that is, θJA is
specified for device in socket for CERDIP and PDIP packages;
θ
is specified for device soldered to printed circuit board for
Figure 8. Input Bias Current vs. Common-Mode Voltage
Figure 6. Input Bias Current vs. Temperature
Figure 9. Common-Mode Rejection vs. Frequency
Rev. H | Page 6 of 16
Page 8
Data Sheet OP400
100
10
1
1k
10010
00304-010
NOISE VOLTAGE DENSITY (nV/ Hz)
FREQUENCY ( Hz )
1k
0
200
400
600
800
11k100
10
00304-011
CURRENT NOIS E DE NS ITY (fA/ Hz )
FREQUENCY ( Hz )
TA =
25°C
V
S
= ±15V
0104
682
00304-012
TIME (Seconds)
2.5
2.1
2.2
2.3
2.4
±2
±6±10±14±18±4±8±12±16
±20
00304-013
TOTAL S UP P LY CURRENT (mA)
SUPPLY VOLTAGE (V)
FOUR AMPLIFIERS
TA = 25°C
2.5
2.1
2.2
2.3
2.4
–75 –50 –25
0
25
50
75100 125
150
00304-014
TOTAL S UP P LY CURRENT (mA)
TEMPERATURE (
°C)
FOUR AMPLIFIERS
V
S
= ±15V
140
0
20
40
60
80
100
120
0.1100k10k1k100101
00304-015
POWER SUPPLY REJECTION (dB)
FREQUENCY ( Hz )
NEGATIVE
SUPPLY
POSITIVE
SUPPLY
Figure 10. Noise Voltage Density vs. Frequency
Figure 11. Current Noise Density vs. Frequency
Figure 13. Total Supply Current vs. Supply Voltage
Figure 14. Total Supply Current vs. Temperature
Figure 12. 0.1 Hz to 10 Hz Noise
Figure 15. Power Supply Rejection vs. Frequency
Rev. H | Page 7 of 16
Page 9
OP400 Data Sheet
TEMPERATURE (°C)
POWER SUPPLY REJECTION (dB)
144
142
138
140
136
134
–751501251007550250–25–50
00304-016
VS= ±15V
TEMPERATURE (°C)
OPEN-LOOP GAIN (V/mV)
5k
4k
2k
3k
1k
0
–75150125100755025
0–25–50
00304-017
VS = ±15V
R
L
= 2kΩ
FREQUENCY ( Hz )
OPEN-LOOP GAIN (dB)
120
40
20
100
80
60
0
101M10k
100k1k100
00304-018
PHASE SHIF T (Degrees)
90
0
45
135
180
GAIN
PHASE
TA = 25°C
VS = ±15V
FREQUENCY ( Hz )
GAIN (dB)
60
80
40
0
20
1101k100100k10k
1M
00304-019
TA = 25°C
VS = ±15V
AV = 1000
AV = 100
AV = 10
A
V
= 1000
FREQUENCY ( Hz )
OUTPUT SWING (V p-p AT 1% Distortion)
20
25
15
5
10
10
1001k10k
100k
00304-020
TA = 25°C
V
S
= ±15V
FREQUENCY ( Hz )
DISTORTION (%)
10
0.1
1
0.01
0.001
1001k10k
000304-021
T
A
= 25°C
V
S
= ±15V
V
OUT
= 10V p-p
R
L
= 2kΩ
A
V
= 100
A
V
= 10
A
V
= 1
Figure 16. Power Supply Rejection vs. Temperature
Figure 17. Open-Loop Gain vs. Temperature
Figure 19. Closed-Loop Gain vs. Frequency
Figure 20. Maximum Output Swing Frequency
Figure 18. Open-Loop Gain and Phase Shift vs. Frequency
Figure 21. Total Harmonic Distortion vs. Frequency
Rev. H | Page 8 of 16
Page 10
Data Sheet OP400
CAPACITIVE LOAD (nF)
OVERSHOOT (%)
45
50
40
25
35
0
5
10
15
20
30
00.51.02.02.51.53.0
000304-022
TA = 25°C
V
S
= ±15V
A
V
= +1
FALLING
RISING
TIME (Minutes)
SHORT-CI RCUIT CURRENT (mA)
34
32
30
28
0123
45
00304-023
SOURCING
SINKING
T
A
= 25°C
VS = ±15V
FREQUENCY ( Hz )
CHANNEL SEPARAT ION (dB)
140
130
120
110
100
90
101001k10k100k
00304-024
TA = 25°C
VS = ±15V
V
IN
= 20V p-p
00304-025
5V
100μs
TA = 25°C
VS = ±15V
AV = +1
00304-026
20mV5μs
T
A
= 25°C
V
S
= ±15V
A
V
= +1
00304-027
20mV
5μs
T
A
= 25°C
V
S
= ±15V
AV = +1
Figure 22. Overshoot vs. Capacitive Load
Figure 23. Short Circuit vs. Time
Figure 25. Large Signal Transient Response
Figure 26. Small Signal Transient Response
Figure 24. Channel Separation vs. Frequency
Figure 27. Small Signal Transient Response, C
LOAD
= 1 nF
Rev. H | Page 9 of 16
Page 11
OP400 Data Sheet
–18V
10k
VDD – V
OH
1k
SATURATION VOLTAGE (mV)
OP400
V
= ±15V
SY
T
= 25°C
A
100
0.0010.010.1110
OUTPUT CURRENT (mA)
VOL – V
SS
20
00304-035
Figure 28. Saturation Voltage vs. Output Current
100Ω10kΩ
–
–
1/4
OP400
–
1/4
OP400
+
–
1/4
OP400
+
1/4
OP400
+
TO SPECTRUM ANALYZER
e
OUT
+
nV
e
( )
OUT
Hz
nV
~
( )
2 × e
=
× 101
n
Hz
00304-028
Figure 29. Noise Test Schematic
14131211 1098
GND
+18V
–
4
+
+
1
–
1234567
V–
V+
–
3
+
+
2
–
00304-029
Figure 30. Burn-In Circuit
Rev. H | Page 10 of 16
Page 12
Data Sheet OP400
10
67 kHz
–
+
20kΩ5kΩ5kΩ
20kΩ
REFERENCE
V
IN
V
IN
R
G
R
G
V
OUT
V
OUT
–
+
20kΩ5kΩ5kΩ
20kΩ
REFERENCE
V
IN
R
G
V
OUT
40,000
= 5 +
00304-030
1/4
OP400A
+
–
1/4
OP400A
+
–
1/4
OP400A
+
–
1/4
OP400A
+
–
APPLICATIONS
The OP400 is inherently stable at all gains and is capable of
driving large capacitive loads without oscillating. Nonetheless,
good supply decoupling is highly recommended. Proper supply
decoupling reduces problems caused by supply line noise and
improves the capacitive load-driving capability of the OP400.
Total supply current can be reduced by connecting the inputs of
an unused amplifier to V−. This turns the amplifier off,
lowering the total supply current.
DUAL LOW POWER INSTRUMENTATION
AMPLIFIER
A dual instrumentation amplifier that consumes less than
33 mW of power per channel is shown in Figure 31. The linear-
ity of the instrumentation amplifier exceeds 16 bits in gains of 5 to
200 and is better than 14 bits in gains from 200 to 1000. CMRR
is above 115 dB (G = 1000). Offset voltage drift is typically
0.4 μV/°C over the military temperature range, which is
comparable to the best monolithic instrumentation amplifiers.
The bandwidth of the low power instrumentation amplifier is
a function of gain and is shown in Table 6.
The output signal is specified with respect to the reference
input, which is normally connected to analog ground. The
reference input can be used to offset the output from −10 V to
+10 V if required.
Table 6. Gain Bandwidth
Gain Bandwidth
5 150 kHz
100 7.5 kHz
1000 500 Hz
Figure 31. Dual Low Power Instrumentation Amplifier
Rev. H | Page 11 of 16
Page 13
OP400 Data Sheet
00304-031
–
+
V
OUT
I
OUT
5mA
I
OUT
V
IN
50,000
200Ω
200Ω
R
G
25kΩ
25kΩ
25kΩ25kΩ
25kΩ25kΩ
R
G
––
1
V
IN
1/4
OP400E
+
–
1/4
OP400E
+
–
1/4
OP400E
+
–
1/4
OP400E
+
–
–
+
00304-032
V
OUT
V
IN
R
G
25kΩ
25kΩ
25kΩ
25kΩ
25kΩ
22pF
22pF
22pF
22pF
25kΩ
25kΩ
25kΩ
V
OUT
V
IN
=
50kΩ + R
G
R
G
REFERENCE
INPUT
1/4
OP400A
+
–
1/4
OP400A
+
–
1/4
OP400A
+
–
1/4
OP400A
+
–
BIPOLAR CURRENT TRANSMITTER
In the circuit of Figure 32, which is an extension of the standard
three op amp instrumentation amplifier, the output current is
proportional to the differential input voltage. Maximum output
current is ±5 mA, with voltage compliance equal to ±10 V when
using ±15 V supplies. Output impedance of the current
transmitter exceeds 3 MΩ, and linearity is better than 16 bits
with gain set for a full-scale input of ±100 µV.
DIFFERENTIAL OUTPUT INSTRUMENTATION
AMPLIFIER
The output voltage swing of a single-ended instrumentation
amplifier is limited by the supplies, normally at ±15 V, to
a maximum of 24 V p-p. The differential output instrumentation amplifier shown in Figure 33 can provide an output voltage
swing of 48 V p-p when operated with ±15 V supplies. The
extended output swing is due to the opposite polarity of the
outputs. Both outputs swing 24 V p-p, but with opposite
polarity, for a total output voltage swing of 48 V p-p. The reference
input can be used to set a common-mode output voltage over the
range ±10 V. The PSRR of the amplifier is less than 1 µV/V with
CMRR (G = 1000) better than 115 dB. Offset voltage drift is
typically 0.4 µV/°C over the military temperature range.
Figure 34 shows a circuit that provides outputs of 10 V, 7.5 V, 5 V,
and 2.5 V for use as a system voltage reference. Maximum
output current from each reference is 5 mA with load regulation
under 25 µV/mA. Line regulation is better than 15 µV/ V,
and output voltage drift is under 20 µV/°C. Output voltage
noise from 0.1 Hz to 10 Hz is typically 75 µV p-p from the
10 V output and proportionately less from the 7.5 V, 5 V, and
2.5 V outputs.
Figure 34. Multiple Output Tracking Voltage Reference
Rev. H | Page 13 of 16
Page 15
OP400 Data Sheet
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.
0.310 (7.87)
0.220 (5.59)
0.005 (0.13) MIN
0.098 (2.49) MAX
0.100 (2.54) BSC
15°
0°
0.320 (8.13)
0.290 (7.37)
0.015 (0.38)
0.008 (0.20)
SEATING
PLANE
0.200 (5.08)
MAX
0.785 (19.94) MAX
0.150
(3.81)
MIN
0.200 (5.08)
0.125 (3.18)
0.023 (0.58)
0.014 (0.36)
0.070 (1.78)
0.030 (0.76)
0.060 (1.52)
0.015 (0.38)
PIN 1
1
7
8
14
COMPLIANT TO JEDEC ST
ANDARDS MS-001
CONTROLLING DIMENSIONSARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUI
VALENTS FOR
REFERENCE O NLYAND ARE NOT APPROPRI
ATE FOR USE IN DESIGN.
CORNER LEADS MAY BE CONFIGURED AS WHOLE O R HALF LEADS.