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AD626 Datasheet
Single-Supply Differential Amplifier

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Low Cost, Single-Supply
Differential Amplifier
AD626
FEATURES
Pin Selectable Gains of 10 and 100
True Single-Supply Operation
Single-Supply Range of +2.4 V to +10 V
Dual-Supply Range of ؎1.2 V to ؎6 V
Wide Output Voltage Range of 30 mV to 4.7 V
Optional Low-Pass Filtering
Excellent DC Performance
Low Input Offset Voltage: 500 V Max
Large Common-Mode Range: 0 V to +54 V
Low Power: 1.2 mW (VS = +5 V)
Good CMR of 90 dB Typ
AC Performance
Fast Settling Time: 24 s (0.01%)
Includes Input Protection
Series Resistive Inputs (RIN = 200 k)
RFI Filters Included
Allows 50 V Continuous Overload
APPLICATIONS
Current Sensing
Interface for Pressure Transducers, Position Indicators,
Strain Gages, and Other Low Level Signal Sources
PRODUCT DESCRIPTION
The AD626 is a low cost, true single-supply differential amplifier
designed for amplifying and low-pass filtering small differential
voltages from sources having a large common-mode voltage.
The AD626 can operate from either a single supply of +2.4 V to
+10 V, or dual supplies of ±1.2 V to ±6 V.The input common-mode
CONNECTION DIAGRAM
8-Lead Plastic Mini-DIP (N)
and SOIC (R) Packages
–IN 1
ANALOG
GND
2
200k
1/6
G = 30
200k
8 +IN
7 G = 100
–VS 3
FILTER 4
100k
AD626
G=2
6 +VS
5 OUT
range of this amplifier is equal to 6 (+VS – 1 V) which provides a
+24 V CMR while operating from a +5 V supply. Furthermore,
the AD626 features a CMR of 90 dB typ.
The amplifier’s inputs are protected against continuous overload of
up to 50 V, and RFI filters are included in the attenuator network.
The output range is +0.03 V to +4.9 V using a +5 V supply.The
amplifier provides a preset gain of 10, but gains between 10 and
100 can be easily configured with an external resistor. Further-
more, a gain of 100 is available by connecting the G = 100 pin to
analog ground.The AD626 also offers low-pass filter capability by
connecting a capacitor between the filter pin and analog ground.
The AD626A and AD626B operate over the industrial temperature
range of –40°C to +85°C.The AD626 is available in two 8-lead
packages: a plastic mini-DIP and SOIC.
140 25
120
100
G = 10, 100
VS = +5V
80
G = 100
60 VS = ؎5V
40
G = 10
VS = ؎5V
20
0
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY – Hz
20
15 ؎VCM FOR SINGLE
AND DUAL SUPPLIES
10
5 ؎VCM FOR DUAL
SUPPLIES ONLY
0
12 34
SUPPLY VOLTAGE – ؎V
5
Figure 1. Common-Mode Rejection vs. Frequency
REV. D
Figure 2. Input Common-Mode Range vs. Supply
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. No license is granted by implication or other-
wise under any patent or patent rights of Analog Devices.Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.


AD626 Datasheet
Single-Supply Differential Amplifier

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AD626* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
View a parametric search of comparable parts
Documentation
Application Notes
• AN-244: A User's Guide to I.C. Instrumentation Amplifiers
• AN-245: Instrumentation Amplifiers Solve Unusual Design
Problems
• AN-282: Fundamentals of Sampled Data Systems
• AN-589: Ways to Optimize the Performance of a
Difference Amplifier
• AN-671: Reducing RFI Rectification Errors in In-Amp
Circuits
Data Sheet
• AD626: Low Cost, Single Supply Differential Amplifier
Data Sheet
Technical Books
• A Designer's Guide to Instrumentation Amplifiers, 3rd
Edition, 2006
Tools and Simulations
• AD626 SPICE Macro-Model
Reference Materials
Technical Articles
• Auto-Zero Amplifiers
• High-performance Adder Uses Instrumentation Amplifiers
• Input Filter Prevents Instrumentation-amp RF-Rectification
Errors
• The AD8221 - Setting a New Industry Standard for
Instrumentation Amplifiers
Design Resources
• AD626 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD626 EngineerZone Discussions
Sample and Buy
Visit the product page to see pricing options
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.


AD626 Datasheet
Single-Supply Differential Amplifier

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IMPORTANT LINKS for the AD626*
Last content update 09/10/2013 07:55 pm
Newer Alternatives: AD8276 or the AD8278 difference amps for their faster speed, smaller foot print, wider supply voltage range, and lower
costs.
PARAMETRIC SELECTION TABLES
Find Similar Products By Operating Parameters
DESIGN COLLABORATION COMMUNITY
DOCUMENTATION
AN-282: Fundamentals of Sampled Data Systems
AN-244: A User’s Guide to I.C. Instrumentation Amplifiers
AN-245: Instrumentation Amplifiers Solve Unusual Design Problems
AN-671: Reducing RFI Rectification Errors in In-Amp Circuits
AN-589: Ways to Optimize the Performance of a Difference Amplifier
A Designer’s Guide to Instrumentation Amplifiers
Auto-Zero Amplifiers
High-performance Adder Uses Instrumentation Amplifiers
Input Filter Prevents Instrumentation-amp RF-Rectification Errors
The AD8221 - Setting a New Industry Standard for Instrumentation
Amplifiers
Applying Instrumentation Amplifiers Effectively: The Importance of an
Input Ground Return
Leading Inside Advertorials: Applying Instrumentation Amplifiers
Effectively—The Importance of an Input Ground Return
Collaborate Online with the ADI support team and other designers
about select ADI products.
Follow us on Twitter: www.twitter.com/ADI_News
Like us on Facebook: www.facebook.com/AnalogDevicesInc
DESIGN SUPPORT
Submit your support request here:
Linear and Data Converters
Embedded Processing and DSP
Telephone our Customer Interaction Centers toll free:
Americas:
1-800-262-5643
Europe:
00800-266-822-82
China:
4006-100-006
India:
1800-419-0108
Russia:
8-800-555-45-90
Quality and Reliability
Lead(Pb)-Free Data
DESIGN TOOLS, MODELS, DRIVERS & SOFTWARE
AD626 SPICE Macro-Model
AD626A SPICE Macro-Model
AD626B SPICE Macro-Model
EVALUATION KITS & SYMBOLS & FOOTPRINTS
Symbols and Footprints
SAMPLE & BUY
AD626
View Price & Packaging
Request Evaluation Board
Request Samples
Check Inventory & Purchase
Find Local Distributors
Powered by TCPDF (www.tcpdf.org)
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet.
Note: Dynamic changes to the content on this page (labeled 'Important Links') does not
constitute a change to the revision number of the product data sheet.
This content may be frequently modified.


AD626 Datasheet
Single-Supply Differential Amplifier

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AD626–SPECIFICATIONS
SINGLE SUPPLY (@+VS = +5 V and TA = 25؇C, unless otherwise noted.)
Model
Parameter
Condition
AD626A
AD626B
Min Typ Max Min Typ Max Unit
GAIN
Gain Accuracy
Gain = 10
Gain = 100
Over Temperature,TA = TMIN to TMAX
Gain Linearity
Gain = 10
Gain = 100
OFFSET VOLTAGE
Input Offset Voltage
vs. Temperature
vs. Temperature
vs. Supply Voltage (PSR)
+PSR
–PSR
Total Error
@ VOUT 100 mV dc
@ VOUT 100 mV dc
G = 10
G = 100
@ VOUT 100 mV dc
@ VOUT 100 mV dc
TMIN to TMAX, G = 10 or 100
TMIN to TMAX, G = 10 or 100
74
64
0.4 1.0
0.1 1.0
50
150
0.014 0.016
0.014 0.02
1.9 2.5
2.9
6
80 74
66 64
0.2 0.6 %
0.5 0.6 %
30 ppm/°C
120 ppm/°C
0.014 0.016 %
0.014 0.02 %
1.9 2.5 mV
2.9 mV
6 µV/°C
80 dB
66 dB
COMMON-MODE REJECTION
+CMR Gain = 10, 100
±CMR Gain = 10, 100
–CMR Gain = 10, 100*
COMMON-MODE VOLTAGE RANGE
+CMV Gain = 10
–CMV Gain = 10
RL = 10 k
f = 100 Hz, VCM = +24 V
f = 10 kHz, VCM = +6 V
f = 100 Hz, VCM = –2 V
CMR > 85 dB
CMR > 85 dB
66
55
60
90
64
85
+24
–2
80 90
55 64
73 85
+24
–2
dB
dB
dB
V
V
INPUT
Input Resistance
Differential
Common-Mode
Input Voltage Range (Common-Mode)
OUTPUT
Output Voltage Swing
Positive
Negative
Short Circuit Current
+ISC
NOISE
Voltage Noise RTI
Gain = 10
Gain = 100
Gain = 10
Gain = 100
RL = 10 k
Gain = 10
Gain = 100
Gain = 10
Gain = 100
f = 0.1 Hz–10 Hz
f = 0.1 Hz–10 Hz
f = 1 kHz
f = 1 kHz
200
100
6 (VS – l)
4.7 4.90
4.7 4.90
0.03
0.03
12
2
2
0.25
0.25
200
100
6 (VS – l)
4.7 4.90
4.7 4.90
0.03
0.03
12
2
2
0.25
0.25
k
k
V
V
V
V
V
mA
µV p-p
µV p-p
µV/ͱHz
µV/ͱHz
DYNAMIC RESPONSE
–3 dB Bandwidth
Slew Rate, TMIN to TMAX
Settling Time
VOUT = +1 V dc
Gain = 10
Gain = 100
to 0.01%, 1 V Step
100
0.17 0.22
0.1 0.17
24
100
0.17 0.22
0.1 0.17
22
kHz
V/µs
V/µs
µs
POWER SUPPLY
Operating Range
Quiescent Current
TA = TMIN to TMAX
Gain = 10
Gain = 100
2.4 5
12 2.4 5
10 V
0.16 0.20
0.16 0.20 mA
0.23 0.29
0.23 0.29 mA
TRANSISTOR COUNT
Number of Transistors
46
46
*At temperatures above 25°C, –CMV degrades at the rate of 12 mV/°C; i.e., @ 25°C CMV = –2 V, @ 85°C CMV = –1.28 V.
Specifications subject to change without notice.
–2– REV. D


AD626 Datasheet
Single-Supply Differential Amplifier

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DUAL SUPPLY (@+VS = ؎5 V and TA = 25؇C, unless otherwise noted.)
AD626
Model
Parameter
GAIN
Gain Accuracy
Gain = 10
Gain = 100
Over Temperature,TA = TMIN to TMAX
Gain Linearity
Gain = 10
Gain = 100
OFFSET VOLTAGE
Input Offset Voltage
vs. Temperature
vs. Temperature
vs. Supply Voltage (PSR)
+PSR
–PSR
COMMON-MODE REJECTION
+CMR Gain = 10, 100
±CMR Gain = 10, 100
COMMON-MODE VOLTAGE RANGE
+CMV Gain = 10
–CMV Gain = 10
INPUT
Input Resistance
Differential
Common-Mode
Input Voltage Range (Common-Mode)
OUTPUT
Output Voltage Swing
Positive
Negative
Short Circuit Current
+ISC
–ISC
NOISE
Voltage Noise RTI
Gain = 10
Gain = 100
Gain = 10
Gain = 100
DYNAMIC RESPONSE
–3 dB Bandwidth
Slew Rate, TMIN to TMAX
Settling Time
POWER SUPPLY
Operating Range
Quiescent Current
TRANSISTOR COUNT
Specifications subject to change without notice.
Condition
AD626A
Min Typ Max
Total Error
RL = 10 k
G = 10
G = 100
0.2 0.5
0.25 1.0
50
100
0.045 0.055
0.01 0.015
TMIN to TMAX, G = 10 or 100
TMIN to TMAX, G = 10 or 100
RL = 10 k
f = 100 Hz, VCM = +24 V
f = 10 kHz, VCM = 6 V
74
64
66
55
CMR > 85 dB
CMR > 85 dB
50 500
1.0
1.0
80
66
90
60
26.5
32.5
RL = 10 k
Gain = 10, 100
Gain = 10
Gain = 100
200
110
6 (VS – l)
4.7
–1.65
–1.45
4.90
–2.1
–1.8
12
0.5
f = 0.1 Hz–10 Hz
f = 0.1 Hz–10 Hz
f = 1 kHz
f = 1 kHz
VOUT = +1 V dc
Gain = 10
Gain = 100
to 0.01%, 1 V Step
TA = TMIN to TMAX
Gain = 10
Gain = 100
Number of Transistors
2
2
0.25
0.25
100
0.17 0.22
0.1 0.17
24
Ϯ1.2
Ϯ5
1.5
1.5
46
Ϯ6
2
2
AD626B
Min Typ Max Unit
0.1 0.3 %
0.15 0.6 %
30 ppm/°C
80 ppm/°C
0.045 0.055 %
0.01 0.015 %
50 250 µV
0.5 mV
0.5 µV/°C
74 80
64 66
dB
dB
80 90
55 60
dB
dB
26.5 V
32.5 V
200
110
6 (VS – l)
4.7
–1.65
–1.45
4.90
–2.1
–1.8
12
0.5
k
k
V
V
V
V
mA
mA
2 µV p-p
2 µV p-p
0.25 µV/ͱHz
0.25 µV/ͱHz
100
0.17 0.22
0.1 0.17
22
kHz
V/µs
V/µs
µs
Ϯ1.2
Ϯ5
1.5
1.5
46
Ϯ6 V
2 mA
2 mA
REV. D
–3–


AD626 datasheets pdf
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