The AD8229 is an ultralow noise instrumentation amplifier designed for measuring small signals in the presence of large common-mode voltages and high temperatures.
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.
The AD8229 excels at measuring tiny signals. It delivers industry leading 1 nV/√Hz input noise performance. The 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.
The AD8229 is one of the fastest instrumentation amplifiers available. Its current feedback architecture provides high 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.
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.
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 also available as Known Good DieAPPLICATIONS
|Title||Content Type||File Type|
|AD8229: 1nV/√Hz Low Noise 210°C Instrumentation Amplifier Data Sheet (Rev B, 02/2012) (pdf, 824 kB)||Data Sheets|
|AD8229 Known Good Die Data Sheet (Rev 0, 08/2011) (pdf, 144 kB)||Data Sheets|
High Temperature Operation of the ADXL206 and AD8229
The 175 °C rated ADXL206 accelerometer and the 210 °C rated AD8229 instrumentation amplifier are used to plot the thermal gradient in a rotisserie oven by combining inclination angle and thermocouple temperature measurements.
High Temperature Operation of an In Amp and Accelerometer
This video shows the high temperation operation of the AD8229 Instrumentation Amplifier (210 C) and the ADXL206 Accelerometer (175 C). Both parts were designed from 'the ground up' and are the first products of their kind in the market.
AD8229: High temperature, Low Noise Instrumentation Amplifier
The AD8229 is designed to withstand temperatures of 210 degree Celsius. It is ideally suited for extreme environments such as aircraft engines and down hole drilling.
|UG-261: Evaluation Boards for the AD62x, AD822x and AD842x Series (pdf, 604 kB)||User Guides|
|MS-2707: Harsh Environments Conquered - Low Power, Precision, High Temperature Components for Extreme High Temperature Applications (pdf, 1574 kB)||Technical Articles|
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|AD8229 SPICE Macro-Model||SPICE Models||HTML|
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