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AD8231TCPZ-EP-R7

更新时间： 2024-11-18 14:47:47
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亚德诺 - ADI 放大器
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20页 598K
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Zero Drift, Digitally Programmable Instrumentation Amplifier

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AD8231TCPZ-EP-R7 数据手册

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Zero Drift, Digitally Programmable  
Instrumentation Amplifier  
Data Sheet  
AD8231-EP  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Digitally/pin-programmable gain  
G = 1, 2, 4, 8, 16, 32, 64, or 128  
Specified from −55°C to +125°C  
50 nV/°C maximum input offset drift  
10 ppm/°C maximum gain drift  
Excellent dc performance  
80 dB minimum CMR, G = 1  
15 µV maximum input offset voltage  
500 pA maximum bias current  
0.7 µV p-p noise (0.1 Hz to 10 Hz)  
Good ac performance  
1
2
3
4
12  
11  
10  
9
NC  
–INA  
+INA  
NC  
+V  
–V  
S
LOGIC  
IN-AMP  
S
OUTA  
REF  
OP  
AD8231-EP  
AMP  
2.7 MHz bandwidth, G = 1  
1.1 V/μs slew rate  
Rail-to-rail output  
Figure 1.  
Shutdown/multiplex  
Extra op amp  
Single-supply range: 3 V to 6 V  
Dual-supply range: 1.5 V to 3 V  
Table 1. Instrumentation and Difference Amplifiers by  
Category  
High  
Performance  
Low  
Cost  
High  
Voltage  
Mil  
Grade  
Low  
Power  
Digital  
Gain  
ENHANCED PRODUCT FEATURES  
AD8221  
AD82201  
AD8222  
AD82241  
AD6231  
AD85531  
AD628  
AD629  
AD620 AD6271 AD82311  
Supports defense and aerospace applications (AQEC  
standard)  
Military temperature range (−55°C to +125°C)  
Controlled manufacturing baseline  
One assembly/test site  
AD621  
AD524  
AD526  
AD624  
AD8250  
AD8251  
AD85551  
AD85561  
AD85571  
One fabrication site  
Enhanced product change notification  
Qualification data available on request  
1 Rail-to-rail output.  
GENERAL DESCRIPTION  
The AD8231-EP also includes an uncommitted op amp that can  
be used for additional gain, differential signal driving, or filtering.  
Like the in-amp, the op amp has an auto-zero architecture, rail-  
to-rail input, and rail-to-rail output.  
The AD8231-EP is a low drift, rail-to-rail, instrumentation  
amplifier with software-programmable gains of 1, 2, 4, 8, 16, 32, 64,  
or 128. The gains are programmed via digital logic or pin  
strapping.  
The AD8231-EP includes a shutdown feature that reduces current  
to a maximum of 1 µA. In shutdown, both amplifiers also have  
a high output impedance, which allows easy multiplexing of  
multiple amplifiers without additional switches.  
The AD8231-EP is ideal for applications that require precision  
performance over a wide temperature range, such as industrial  
temperature sensing and data logging. Because the gain setting  
resistors are internal, maximum gain drift is only 10 ppm/°C for  
gains of 1 to 32. Because of the auto-zero input stage, maximum  
input offset is 15 µV and maximum input offset drift is just  
50 nV/°C. CMRR is 80 dB for G = 1, increasing to 110 dB at  
higher gains.  
The AD8231-EP is specified over the military temperature  
range of −55°C to +125°C. It is available in a 4 mm × 4 mm 16-  
lead LFCSP.  
Additional application and technical information can be found  
in the AD8231 data sheet.  
Rev. A  
Document Feedback  
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  
rightsof third parties that may result fromits 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 andregisteredtrademarks 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 ©2011–2017 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
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AD8231TCPZ-EP-R7 替代型号

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