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Description

The AD8429 is an ultralow noise, instrumentation amplifier designed for measuring extremely small signals over a wide temperature range (−40°C to +125°C). The IC excels at measuring tiny signals. It delivers ultralow input noise performance of 1 nV/√Hz. The high CMRR of the AD8429 prevents unwanted signals from corrupting the acquisition. The CMRR increases as the gain increases, offering high rejection when it is most needed. The high performance pin configuration of the device allows it to reliably maintain high CMRR at frequencies well beyond those of typical instrumentation amplifiers. The AD8429 reliably amplifies fast changing signals. 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. 

Features

1. Low noise
2. 1 nV/√Hz input noise
3. 45 nV/√Hz output noise
4. High accuracy dc performance (AD8429BRZ)
5. Excellent ac specifications
6. Gain set with a single resistor (G = 1 to 10,000)
7. Temperature range for specified performance −40°C to +125°C

Applications 

1. Medical instrumentation
2. Precision data acquisition
3. Microphone preamplification
4. Vibration analysis