Overview
The AD822ARMZ-R2 is a dual precision, low power FET input operational amplifier (op-amp) produced by Analog Devices Inc. This device is part of the AD822 series, known for its high precision and versatility. The AD822 can operate from a single supply of 5 V to 30 V or from dual supplies of ±2.5 V to ±15 V, making it suitable for a wide range of applications. It features true single-supply capability, allowing it to accommodate input signals below ground while in single-supply mode. The AD822 is available in various package types, including 8-lead PDIP, MSOP, and SOIC_N, and is rated over the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Test Conditions/Comments | A Grade | B Grade | Unit |
|---|---|---|---|---|
| Input Voltage Range | TMIN to TMAX | −0.2 to +4 | −0.2 to +4 | V |
| Common-Mode Rejection Ratio (CMRR) | VCM = 0 V to 2 V | 66 to 80 | 66 to 80 | dB |
| Input Impedance Differential | 10^13 || 0.5 | 10^13 || 0.5 | Ω || pF | |
| Input Impedance Common Mode | 10^13 || 2.8 | 10^13 || 2.8 | Ω || pF | |
| Offset Voltage | 0.4 to 2 | 0.3 to 1.5 | mV | |
| Offset Voltage Drift | 2 | 2 | µV/°C | |
| Input Bias Current | VCM = 0 V | 2 to 25 | 2 to 12 | pA |
| Unity-Gain Bandwidth | 1.8 | 1.8 | MHz | |
| Slew Rate | 3 | 3 | V/µs | |
| Supply Current per Amplifier | 800 | 800 | µA |
Key Features
- True Single-Supply Capability: The AD822 can accommodate input signals below ground while in single-supply mode.
- Low Power Consumption: Operates with a low supply current of 800 µA per amplifier.
- High Precision: Features an offset voltage of 800 µV maximum and an offset voltage drift of 2 µV/°C.
- Low Input Bias Currents: Below 25 pA, suitable for high impedance sources.
- High CMRR and Input Impedance: Common-mode rejection ratio (CMRR) of 66 dB to 80 dB and high input impedance.
- Wide Operating Voltage Range: Can operate from a single supply of 5 V to 30 V or from dual supplies of ±2.5 V to ±15 V.
- High Bandwidth and Slew Rate: 1.8 MHz unity-gain bandwidth and 3 V/µs slew rate.
Applications
- Medical Instrumentation: Suitable for medical devices requiring high precision and low noise.
- Industrial Process Controls: Used in industrial control systems for precise signal amplification.
- Wheatstone Bridge Sensors: Ideal for amplifying signals from Wheatstone bridge configurations.
- Differential Drives for High Resolution ADCs: Used to drive differential input analog-to-digital converters (ADCs).
- Remote Sensors: Provides high noise immunity, making it suitable for remote sensing applications.
Q & A
- What is the operating voltage range of the AD822?
The AD822 can operate from a single supply of 5 V to 30 V or from dual supplies of ±2.5 V to ±15 V.
- What is the typical input bias current of the AD822?
The typical input bias current is below 25 pA.
- What is the unity-gain bandwidth of the AD822?
The unity-gain bandwidth is 1.8 MHz.
- What is the slew rate of the AD822?
The slew rate is 3 V/µs.
- What are the package options available for the AD822?
The AD822 is available in 8-lead PDIP, MSOP, and SOIC_N packages.
- What is the common-mode rejection ratio (CMRR) of the AD822?
The CMRR is 66 dB to 80 dB.
- What is the maximum offset voltage of the AD822?
The maximum offset voltage is 800 µV.
- What is the temperature range for the AD822?
The AD822 is rated over the industrial temperature range of −40°C to +85°C.
- What are some typical applications of the AD822?
Typical applications include medical instrumentation, industrial process controls, Wheatstone bridge sensors, and remote sensors.
- How much current does the AD822 consume per amplifier?
The AD822 consumes 800 µA of supply current per amplifier.
