AD8429 Datasheet – Instrumentation Amplifier ( PDF )

Part Number: AD8429

Function: 1 nV/√Hz Low Noise Instrumentation Amplifier

Package: SOIC 8 Pin Type

Manufacturer: Analog Devices


AD8429 datasheet



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 AD8429 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 AD8429 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. The AD8429 was designed for excellent distortion performance, allowing use in demanding applications such as vibration analysis.


1. Low noise
2. 1 nV/√Hz input noise
3. 45 nV/√Hz output noise
4. High accuracy dc performance (AD8429BRZ)
5. 90 dB CMRR minimum (G = 1)
6. 50 μV maximum input offset voltage
7. 0.02% maximum gain accuracy (G = 1)
8. Excellent ac specifications
9. 80 dB CMRR to 5 kHz (G = 1)
10. 15 MHz bandwidth (G = 1)
11. 1.2 MHz bandwidth (G = 100)
12. 22 V/μs slew rate
13. THD: −130 dBc (1 kHz, G = 1)
14. Versatile
15 .±4 V to ±18 V dual supply
16. Gain set with a single resistor (G = 1 to 10,000)


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

Other data sheets are available within the file:

AD8429ARZ, AD8429ARZ-R7, AD8429BRZ, AD8429BRZ-R7

AD8429 Datasheet PDF Download

AD8429 pdf