The AD8229 is an ultralow noise instrumentation amplifier designed for measuring extremely small signals over a wide temperature range (-40°C to 210°C).

From its inception, the AD8229 was carefully designed for high temperature operation. The AD8229 uses a dielectrically isolated process to prevent parasitic leakage currents at high temperatures. To enhance long term reliability, the wire bonding in the packaging is designed to avoid inter-metallic absorption at high temperatures. The AD8229 is guaranteed for 1000 hours of operation at 210°C.

The AD8229 excels at measuring tiny signals. It delivers industry leading 1 nV/√Hz input noise performance. The AD8229’s high CMRR prevents unwanted signals from corrupting the acquisition. The CMRR increases as the gain increases, offering high rejection when it is most needed. The AD8229's high performance pin-out allows it to reliably maintain its CMRR performance at frequencies well beyond those of typical instrumentation amplifiers: CMRR is guaranteed out to 5 kHz.

The AD8229 is one of the fastest instrumentation amplifiers available. Its current feedback architecture provides high bandwidth, even at high gains, 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 to single supply parts.

The AD8229 is available in an 8-pin ceramic DIP package.

APPLICATIONS

Down-hole instrumentation
Harsh environment data acquisition
Exhaust gas measurements Vibration analysis

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