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参数资料
型号： AD8420BRMZ-R7
厂商： ANALOG DEVICES INC
元件分类： 测量放大器
英文描述： INSTRUMENTATION AMPLIFIER, PDSO8
封装： ROHS COMPLIANT, MO-187AA, MSOP-8
文件页数： 1/10页
文件大小： 249K
代理商： AD8420BRMZ-R7
Wide Supply Range, Rail-to-Rail Output
Instrumentation Amplifier
Preliminary Technical Data
AD8420
FEATURES
Rev. PrD
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.
Tel: 781.329.4700
Fax: 781.461.3113
Gain set with 2 external resistors
Gain range: 1 to 1000
Input voltage goes below ground
Very wide power supply range
Single supply: 2.7V to 36V
Dual supply: +/-2.7V to+/-18V
Bandwidth (G=100): 2.5 kHz
Input noise: 50 nV/√Hz
Max supply current: 90 μA
Max offset voltage: 200 uV
Max differential input voltage: 1V
Min CMRR: 100 dB
MSOP-8 package
APPLICATIONS
Bridge amplifiers
Pressure Measurement
Medical instrumentation
Portable data acquisition
Multichannel systems
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
–IN
1
NC
2
3
+IN
4
+V
S
8
V
OUT
7
REF
6
–V
S
5
AD8420
FB
Figure 1.
Table 1. Instrumentation Amplifiers by Category
1
General
Purpose
Drift
Grade
AD8221/2
AD8231
AD620
AD8220/4
AD8290
AD621
AD8228
AD8293
AD524
AD8295
AD8553
AD526
AD8556
AD624
AD8557
Zero
Military
Low
Power
AD8420
AD8235
/
6
AD627
AD8226
/
7
AD623
AD8223
Digital
Gain
AD8250
AD8251
AD8253
AD8231
1
See
www.analog.com
for the latest instrumentation amplifiers.
GENERAL DESCRIPTION
The AD8420 is a low cost, wide supply range amplifier that uses
two resistors to set any gain between 1 and 1000. It is optimized
to amplify small differential voltages in the presence of large
common mode signals.
The AD8420 is based on a current mode architecture that gives
it excellent input common mode range. Unlike conventional
instrumentation amplifiers, the AD8420 can easily amplify
signals at or even slightly below ground without requiring dual
supplies. The AD8420 has a full rail to rail output, and the
output voltage is completely independent of the input common
mode voltage.
The AD8420 can operate off both single or dual supplies. It
works well for a portable system with a limited single supply
voltage and equally well for a system using large dual supplies.
Gain is set using the ratio of two resistors. A reference pin
allows the user to offset the output voltage. This feature is useful
when the output signal needs to be centered around a specific
voltage, such as mid-supply.
The AD8420 is available in an 8 pin MSOP package.
Performance is specified over the full temperature range of
40°C to +85°C. Part is operational from 40°C to +125°C
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相关代理商/技术参数
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