Instrumentation Amplifier. AD8230 Datasheet

AD8230 Amplifier. Datasheet pdf. Equivalent

Part AD8230
Description Precision Instrumentation Amplifier
Feature 16 V Rail-to-Rail, Zero-Drift, Precision Instrumentation Amplifier AD8230 FEATURES Resistor program.
Manufacture Analog Devices
Datasheet
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16 V Rail-to-Rail, Zero-Drift, Precision Instrumentation Amp AD8230 Datasheet
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AD8230
16 V Rail-to-Rail, Zero-Drift,
Precision Instrumentation Amplifier
AD8230
FEATURES
Resistor programmable gain range: 101 to 1000
Supply voltage range: ±4 V to ±8 V
Rail-to-rail input and output
Maintains performance over −40°C to +125°C
Excellent ac and dc performance
110 dB minimum CMR @ 60 Hz, G = 10 to 1000
10 μV maximum offset voltage (RTI, ±5 V operation)
50 nV/°C maximum offset drift
20 ppm maximum gain nonlinearity
APPLICATIONS
Pressure measurements
Temperature measurements
Strain measurements
Automotive diagnostics
GENERAL DESCRIPTION
The AD8230 is a low drift, differential sampling, precision
instrumentation amplifier. Auto-zeroing reduces offset voltage
drift to less than 50 nV/°C. The AD8230 is well-suited for
thermocouple and bridge transducer applications. The
AD8230’s high CMR of 110 dB (minimum) rejects line noise in
measurements where the sensor is far from the instrumentation.
The 16 V rail-to-rail, common-mode input range is useful for
noisy environments where ground potentials vary by several
volts. Low frequency noise is kept to a minimal 3 μV p-p,
making the AD8230 perfect for applications requiring the
utmost dc precision. Moreover, the AD8230 maintains its high
performance over the extended industrial temperature range of
−40°C to +125°C.
Two external resistors are used to program the gain. By using
matched external resistors, the gain stability of the AD8230 is
much higher than instrumentation amplifiers that use a single
resistor to set the gain. In addition to allowing users to program
the gain between 101 and 1000, users can adjust the output
offset voltage.
CONNECTION DIAGRAM
–VS 1
+VS 2
8 VOUT
7 RG
VREF1 3
+IN 4
AD8230
6 VREF2
5 –IN
TOP VIEW
(Not to Scale)
Figure 1. 8-Lead SOIC (R-8)
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–50 –30 –10
10 30 50 70 90
TEMPERATURE (°C)
110 130 150
Figure 2. Relative Offset Voltage vs. Temperature
+5V
–5V
0.1µF
0.1µF
2
41
TYPE K THERMOCOUPLE AD8230
8
5
6
3
7
34.8k
VOUT
284
Figure 3. Thermocouple Measurement
The AD8230 is versatile yet simple to use. Its auto-zeroing
topology significantly minimizes the input and output
transients typical of commutating or chopper instrumentation
amplifiers. The AD8230 operates on ±4 V to ±8 V (+8 V to +16 V)
supplies and is available in an 8-lead SOIC.
1 The AD8230 can be programmed for a gain as low as 2, but the maximum
input voltage is limited to approximately 750 mV.
Rev. B
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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 ©2004–2007 Analog Devices, Inc. All rights reserved.



AD8230
AD8230* Product Page Quick Links
Last Content Update: 08/30/2016
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Documentation
Application Notes
• AN-282: Fundamentals of Sampled Data Systems
• AN-671: Reducing RFI Rectification Errors in In-Amp
Circuits
Data Sheet
• AD8230: 16 V Rail-to-Rail, Zero-Drift, Precision
Instrumentation Amplifier Data Sheet
Technical Books
• A Designer's Guide to Instrumentation Amplifiers, 3rd
Edition, 2006
Reference Materials
Analog Dialogue
• Which ADC Architecture Is Right for Your Application?
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
• AD8230 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
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