參數(shù)資料
型號(hào)： AD8553
廠商： Analog Devices, Inc.
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Precision, Dual-Channel Instrumentation Amplifier
中文描述： 精密，雙通道儀表放大器
文件頁(yè)數(shù)： 1/24頁(yè)
文件大?。?/td> 435K
代理商： AD8553
Precision, Dual-Channel
Instrumentation Amplifier
AD8222
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
GENERAL DESCRIPTION
Rev. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
AD8222
1
2
3
4
12
11
10
9
5
6
7
8
13
14
15
16
–IN1
RG1
RG1
+IN1
–IN2
RG2
RG2
+IN2
+
S
R
R
–
S
+
S
O
O
–
S
0
Figure 1. 4mm × 4 mm LFCSP
Table 1. In Amps and Differential Amplifier by Category
High
Performance
AD8221
AD8220
1
AD8222
Low
Cost
AD8553
1
AD623
1
High
Voltage
AD628
AD629
Mil
Grade
AD620
AD621
AD524
AD526
AD624
Low
Power
AD627
1
Digital
Prog
Gain
AD8555
1
AD8556
1
AD8557
1
1
Rail-to-rail output.
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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