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AD8229_16

更新时间： 2024-11-19 01:12:35
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亚德诺 - ADI /
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1 nV/√Hz Low Noise 210°C Instrumentation Amplifier

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1 nV/√Hz Low Noise  
210°C Instrumentation Amplifier  
AD8229  
Data Sheet  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Designed and guaranteed for 210°C operation  
Low noise  
1 nV/√Hz input noise  
45 nV/√Hz output noise  
High CMRR  
AD8229  
1
2
3
4
8
7
6
5
–IN  
+V  
S
R
R
V
OUT  
G
G
REF  
–V  
+IN  
S
126 dB CMRR (minimum), G = 100  
80 dB CMRR (minimum) to 5 kHz, G = 1  
Excellent ac specifications  
15 MHz bandwidth (G = 1)  
1.2 MHz bandwidth (G = 100)  
22 V/μs slew rate  
TOP VIEW  
(Not to Scale)  
Figure 1.  
100  
80  
60  
THD: −130 dBc (1 kHz, G = 1)  
Versatile  
40  
20  
4 V to 17 V dual supply  
0
Gain set with single resistor (G = 1 to 1000)  
Specified temperature range  
−40°C to +210°C, SBDIP package  
−40°C to +175°C, SOIC package  
–20  
–40  
–60  
–80  
–100  
APPLICATIONS  
Down-hole instrumentation  
Harsh environment data acquisition  
Exhaust gas measurements  
Vibration analysis  
–55 –35 –15  
5
25 45 65 85 105 125 145 165 185 205 225  
TEMPERATURE (°C)  
Figure 2. Typical Input Offset vs. Temperature (G = 100)  
GENERAL DESCRIPTION  
The AD8229 is an ultralow noise instrumentation amplifier  
designed for measuring small signals in the presence of large  
common-mode voltages and high temperatures.  
bandwidth at high gain, for example, 1.2 MHz at G = 100. The  
design includes circuitry to improve settling time after large  
input voltage transients. The AD8229 was designed for excellent  
distortion performance, allowing use in demanding applications  
such as vibration analysis.  
The AD8229 has been designed for high temperature operation.  
The process is dielectrically isolated to avoid leakage currents at  
high temperatures. The design architecture was chosen to  
compensate for the low VBE voltages at high temperatures.  
Gain is set from 1 to 1000 with a single resistor. A reference pin  
allows the user to offset the output voltage. This feature can be  
useful when interfacing with analog-to-digital converters.  
The AD8229 excels at measuring tiny signals. It delivers industry  
leading 1 nV/√Hz input noise performance. e high CMRR of  
the AD8229 prevents unwanted signals from corrupting the  
acquisition. The CMRR increases as the gain increases, offering  
high rejection when it is most needed.  
For the most demanding applications, the AD8229 is available  
in an 8-lead side-brazed ceramic dual in-line package (SBDIP).  
For space-constrained applications, the AD8229 is available in  
an 8-lead plastic standard small outline package (SOIC).  
The AD8229 is one of the fastest instrumentation amplifiers  
available. Its current feedback architecture provides high  
Rev. B  
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 registeredtrademarks arethe property of their respective owners.  
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 ©2011–2012 Analog Devices, Inc. All rights reserved.  
 
 
 
 
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