AD8421 Datasheet – Instrumentation Amplifier

Part Number : AD8421

Function : 3 nV/√Hz, Low Power Instrumentation Amplifier

Manufacturers : Analog Devices

Pinouts :

AD8421 datasheet

Description :

The AD8421 is a low cost, low power, extremely low noise, ultra low bias current, high speed instrumentation amplifier that is ideally suited for a broad spectrum of signal conditioning and data acquisition applications. This product features extremely high CMRR, allowing it to extract low level signals in the presence of high frequency common-mode noise over a wide temperature range. The 10 MHz bandwidth, 35 V/μs slew rate, and 0.6 μs settling time to 0.001% (G = 10) allow the AD8421 to amplify high speed signals and excel in applications that require high channel count, multiplexed systems. Even at higher gains, the current feedback architecture maintains high performance; for example, at G = 100, the bandwidth is 2 MHz and the settling time is 0.8 μs. The
AD8421has excellent distortion performance, making it suitable for use in demanding applications such as vibration analysis.

Features

1. Low power
2. 2.3 mA maximum supply current
3. Low noise
4. 3.2 nV/√Hz maximum input voltage noise at 1 kHz
5. 200 fA/√Hz current noise at 1 kHz
6. Excellent ac specifications
7. 10 MHz bandwidth (G = 1)
8. 2 MHz bandwidth (G = 100)
9. 0.6 μs settling time to 0.001% (G = 10)
10. 80 dB CMRR at 20 kHz (G = 1)
11. 35 V/μs slew rate
12. High precision dc performance (AD8421BRZ)
13. 94 dB CMRR minimum (G = 1)
14 .0.2 μV/°C maximum input offset voltage drift
15. 1 ppm/°C maximum gain drift (G = 1)
16. 500 pA maximum input bias current
17. Inputs protected to 40 V from opposite supply
18. ±2.5 V to ±18 V dual supply (5 V to 36 V single supply)
19. Gain set with a single resistor (G = 1 to 10,000)

Applications

1. Medical instrumentation
2. Precision data acquisition
3. Microphone preamplification
4. Vibration analysis
5. Multiplexed input applications
6. ADC driver

Other data sheets within the file :
AD8421ARMZ, AD8421ARMZ-R7, AD8421ARMZ-RL, AD8421ARZ

AD8421 Datasheet PDF Download

AD8421 pdf