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AD8222BCPZ-R7 数据表(PDF) 1 Page - Analog Devices

部件名 AD8222BCPZ-R7
功能描述  Precision, Dual-Channel Instrumentation Amplifier
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD8222BCPZ-R7 数据表(HTML) 1 Page - Analog Devices

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Precision, Dual-Channel
Instrumentation Amplifier
AD8222
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
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
©2006–2010 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 at 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
140 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. 4 mm × 4 mm LFCSP
Table 1. Instrumentation Amplifiers by Category1
General
Purpose
Zero
Drift
Military
Grade
Low
Power
High Speed
PGA
AD8220
AD8231
AD620
AD8235
AD8250
AD8221
AD8290
AD621
AD8236
AD8251
AD8222
AD8293
AD524
AD627
AD8253
AD8224
AD8553
AD526
AD623
AD8228
AD8556
AD624
AD8223
AD8295
AD8557
AD8226
AD8227
1 See www.analog.com for the latest selection of instrumentation amplifiers.
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, differen-
tial 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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