Instrumentation Amplifier. AD620 Datasheet

AD620 Amplifier. Datasheet pdf. Equivalent

Part AD620
Description Low Power Instrumentation Amplifier
Feature FEATURES Easy to use Gain set with one external resistor (Gain range 1 to 10,000) Wide power supply .
Manufacture Analog Devices
Datasheet
Download AD620 Datasheet



AD620
FEATURES
Easy to use
Gain set with one external resistor
(Gain range 1 to 10,000)
Wide power supply range (±2.3 V to ±18 V)
Higher performance than 3 op amp IA designs
Available in 8-lead DIP and SOIC packaging
Low power, 1.3 mA max supply current
Excellent dc performance (B grade)
50 μV max, input offset voltage
0.6 μV/°C max, input offset drift
1.0 nA max, input bias current
100 dB min common-mode rejection ratio (G = 10)
Low noise
9 nV/√Hz @ 1 kHz, input voltage noise
0.28 μV p-p noise (0.1 Hz to 10 Hz)
Excellent ac specifications
120 kHz bandwidth (G = 100)
15 μs settling time to 0.01%
APPLICATIONS
Weigh scales
ECG and medical instrumentation
Transducer interface
Data acquisition systems
Industrial process controls
Battery-powered and portable equipment
Table 1. Next Generation Upgrades for AD620
Part Comment
AD8221
Better specs at lower price
AD8222
Dual channel or differential out
AD8226
Low power, wide input range
AD8220
JFET input
AD8228
Best gain accuracy
AD8295
+2 precision op amps or differential out
AD8429
Ultra low noise
Rev. H
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.
Low Cost Low Power
Instrumentation Amplifier
AD620
CONNECTION DIAGRAM
RG 1
–IN 2
+IN 3
–VS 4
AD620
TOP VIEW
8 RG
7 +VS
6 OUTPUT
5 REF
Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R) Packages
PRODUCT DESCRIPTION
The AD620 is a low cost, high accuracy instrumentation
amplifier that requires only one external resistor to set gains of
1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and
DIP packaging that is smaller than discrete designs and offers
lower power (only 1.3 mA max supply current), making it a
good fit for battery-powered, portable (or remote) applications.
The AD620, with its high accuracy of 40 ppm maximum
nonlinearity, low offset voltage of 50 μV max, and offset drift of
0.6 μV/°C max, is ideal for use in precision data acquisition
systems, such as weigh scales and transducer interfaces.
Furthermore, the low noise, low input bias current, and low power
of the AD620 make it well suited for medical applications, such
as ECG and noninvasive blood pressure monitors.
The low input bias current of 1.0 nA max is made possible with
the use of Superϐeta processing in the input stage. The AD620
works well as a preamplifier due to its low input voltage noise of
9 nV/√Hz at 1 kHz, 0.28 μV p-p in the 0.1 Hz to 10 Hz band,
and 0.1 pA/√Hz input current noise. Also, the AD620 is well
suited for multiplexed applications with its settling time of 15 μs
to 0.01%, and its cost is low enough to enable designs with one
in-amp per channel.
30,000
25,000
20,000
3 OP AMP
IN-AMP
(3 OP-07s)
15,000
10,000
5,000
AD620A
RG
0
0 5 10 15 20
SUPPLY CURRENT (mA)
Figure 2. Three Op Amp IA Designs vs. AD620
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© 2003–2011 Analog Devices, Inc. All rights reserved.



AD620
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Last Content Update: 02/23/2017
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REFERENCE DESIGNS
CN0146
EVALUATION KITS
AD62x, AD822x, AD842x Series InAmp Evaluation Board
DOCUMENTATION
Application Notes
AN-1401: Instrumentation Amplifier Common-Mode
Range: The Diamond Plot
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
AD620: Low Cost, Low Power Instrumentation Amplifier
AD620: Military Data Sheet
Technical Books
A Designer's Guide to Instrumentation Amplifiers, 3rd
Edition, 2006
User Guides
UG-261: Evaluation Boards for the AD62x, AD822x and
AD842x Series
TOOLS AND SIMULATIONS
In-Amp Error Calculator
AD620 SPICE Macro-Model
REFERENCE MATERIALS
Technical Articles
Auto-Zero Amplifiers
High-performance Adder Uses Instrumentation Amplifiers
Input Filter Prevents Instrumentation-amp RF-
Rectification Errors
Protecting Instrumentation Amplifiers
The AD8221 - Setting a New Industry Standard for
Instrumentation Amplifiers
DESIGN RESOURCES
AD620 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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