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AD8553 Datasheet(PDF) 1 Page - Analog Devices

Part No. AD8553
Description  Precision, Dual-Channel Instrumentation Amplifier
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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Precision, Dual-Channel
Instrumentation Amplifier
AD8222
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Two channels in small 4 mm × 4 mm LFCSP
Gain set with 1 resistor per amplifier (G = 1 to 10,000)
Low noise
8 nV/√Hz @ 1 kHz
0.25 μV p-p (0.1 Hz to 10 Hz)
High accuracy dc performance (B grade)
60 μV maximum input offset voltage
0.3 μV/°C maximum input offset drift
1.0 nA maximum input bias current
126 dB minimum CMRR (G = 100)
Excellent ac performance
150 kHz bandwidth (G = 100)
13 μs settling time to 0.001%
Differential output option (single channel)
Fully specified
Adjustable common-mode output
Supply range: ±2.3 V to ±18 V
APPLICATIONS
Multichannel data acquisition for
ECG and medical instrumentation
Industrial process controls
Wheatstone bridge sensors
Differential drives for
High resolution input ADCs
Remote sensors
FUNCTIONAL BLOCK DIAGRAM
AD8222
1
2
3
4
12
11
10
9
56
7
8
13
14
15
16
–IN1
RG1
RG1
+IN1
–IN2
RG2
RG2
+IN2
Figure 1. 4mm × 4 mm LFCSP
Table 1. In Amps and Differential Amplifier by Category
High
Performance
Low
Cost
High
Voltage
Mil
Grade
Low
Power
Digital
Prog
Gain
AD8221
AD82201
AD8222
AD85531
AD6231
AD628
AD629
AD620
AD621
AD524
AD526
AD624
AD6271
AD85551
AD85561
AD85571
1 Rail-to-rail output.
GENERAL DESCRIPTION
The AD8222 is a dual-channel, high performance instrumentation
amplifier that requires only one external resistor per amplifier
to set gains of 1 to 10,000.
The AD8222 is the first dual-instrumentation amplifier in the
small 4 mm × 4mm LFCSP. It requires the same board area as a
typical single instrumentation amplifier. The smaller package
allows a 2× increase in channel density and a lower cost per
channel, all with no compromise in performance.
The AD8222 can also be configured as a single-channel,
differential output instrumentation amplifier. Differential
outputs provide high noise immunity, which can be useful when
the output signal must travel through a noisy environment, such
as with remote sensors. The configuration can also be used to
drive differential input ADCs.
The AD8222 maintains a minimum CMRR of 80 dB to 4 kHz
for all grades at G = 1. High CMRR over frequency allows the
AD8222 to reject wideband interference and line harmonics,
greatly simplifying filter requirements. The AD8222 also has a
typical CMRR drift over temperature of just 0.07 μV/V/°C at G = 1.
The AD8222 operates on both single and dual supplies and only
requires 2.2 mA maximum supply current for both amplifiers. It
is specified over the industrial temperature range of −40°C to
+85°C and is fully RoHS compliant.
For a single-channel version, see the AD8221.




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