The AD8221 Precision Instrumentation Amplifier Module is a high-performance, low-noise amplifier designed for accurate signal amplification in sensor-based and measurement applications. Built around the AD8221 operational amplifier, this module provides excellent Common-Mode Rejection Ratio (CMRR) and stable gain across a wide frequency range, making it ideal for handling weak analog signals from various sensors.
This precision amplifier allows the user to set the gain using a single external resistor, adjustable from 1 to 1000, enabling flexible signal scaling for a wide variety of sensing applications.
Features
High Precision, Low Noise Design for reliable and accurate signal amplification
Adjustable Gain (1–1000) via external resistor
Excellent CMRR: 80 dB minimum up to 10 kHz (G = 1)
Wide Bandwidth: 825 kHz (G = 1)
Fast Slew Rate: 2 V/µs
Low Input Voltage Noise: 8 nV/√Hz @ 1 kHz
Low Offset Voltage: 25 µV (max)
Wide Supply Range: ±2.3 V to ±18 V
Operating Temperature Range: −40°C to +125°C
Compact PCB with easy input/output pin access
Specifications
| Parameter | Description |
|---|
| Model | AD8221 Precision Instrumentation Amplifier |
| Gain Range | 1 – 1000 (via external resistor) |
| Supply Voltage | ±2.3 V to ±18 V |
| Bandwidth | 825 kHz (G = 1) |
| CMRR | ≥ 80 dB @ 10 kHz |
| Input Voltage Noise | 8 nV/√Hz @ 1 kHz |
| Offset Voltage | ≤ 25 µV |
| Temperature Range | −40°C to +125°C |
| Output Type | Analog voltage |
| Dimensions | Approx. 27 × 20 mm |
| Mount Type | Through-hole / pin header |
Applications
Temperature, pressure, or light sensing systems
Strain gauge and load cell amplifiers
Industrial process control systems
Bridge amplifier and data acquisition circuits
Medical instrumentation
Precision transducer interface
Package Includes
