Overview
The AD8222ACPZ-R7 is a high-performance, dual-channel instrumentation amplifier produced by Analog Devices Inc. This component is notable for its compact 4 mm × 4 mm LFCSP (Lead Frame Chip Scale Package) and its ability to set gains from 1 to 10,000 using just one external resistor per amplifier. The AD8222 is designed to offer high accuracy and low noise, making it suitable for a variety of precision applications. It operates over an industrial temperature range of −40°C to +85°C and is fully RoHS compliant.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Gain Range | 1 to 10,000 | Set with one external resistor per amplifier |
| Noise | 8 nV/√Hz at 1 kHz | VS = ±15 V, VREF = 0 V, TA = 25°C |
| Input Offset Voltage | 60 µV maximum | B grade |
| Input Offset Drift | 0.3 µV/°C maximum | B grade |
| Input Bias Current | 1.0 nA maximum | |
| CMRR (Common Mode Rejection Ratio) | 126 dB minimum (G = 100) | |
| Bandwidth | 140 kHz (G = 100) | |
| Settling Time | 13 µs to 0.001% | |
| Supply Range | ±2.3 V to ±18 V | |
| Supply Current | 2.2 mA maximum for both amplifiers | |
| Temperature Range | −40°C to +85°C | Specified performance |
Key Features
- Dual-channel instrumentation amplifier in a compact 4 mm × 4 mm LFCSP package.
- Gain set with one external resistor per amplifier (G = 1 to 10,000).
- Low noise: 8 nV/√Hz at 1 kHz and 0.25 µV p-p (0.1 Hz to 10 Hz).
- High accuracy DC performance with 60 µV maximum input offset voltage and 0.3 µV/°C maximum input offset drift.
- Excellent AC performance with 140 kHz bandwidth (G = 100) and 13 µs settling time to 0.001%.
- Differential output option for single-channel configuration, providing high noise immunity.
- Adjustable common-mode output and fully specified operation.
- Operates on both single and dual supplies with a supply range of ±2.3 V to ±18 V.
- Low quiescent current of 2.2 mA maximum for both amplifiers.
Applications
- Multichannel data acquisition for ECG and medical instrumentation.
- Industrial process controls.
- Wheatstone bridge sensors.
- Differential drives for high resolution input ADCs.
- Remote sensors.
Q & A
- What is the gain range of the AD8222?
The AD8222 can set gains from 1 to 10,000 using one external resistor per amplifier.
- What is the noise performance of the AD8222?
The AD8222 has a noise level of 8 nV/√Hz at 1 kHz and 0.25 µV p-p (0.1 Hz to 10 Hz).
- What is the input offset voltage of the AD8222?
The input offset voltage is 60 µV maximum for the B grade.
- What is the CMRR of the AD8222?
The AD8222 has a minimum CMRR of 126 dB at G = 100.
- What is the bandwidth of the AD8222?
The bandwidth is 140 kHz at G = 100.
- Can the AD8222 be configured for differential output?
- What is the supply range of the AD8222?
The supply range is ±2.3 V to ±18 V.
- What is the maximum supply current for the AD8222?
The maximum supply current is 2.2 mA for both amplifiers.
- What are the typical applications of the AD8222?
The AD8222 is used in multichannel data acquisition, ECG and medical instrumentation, industrial process controls, Wheatstone bridge sensors, differential drives for high resolution input ADCs, and remote sensors.
- Is the AD8222 RoHS compliant?
