Overview
The AD822ANZ is a dual precision, low power FET input operational amplifier (op-amp) manufactured by Analog Devices Inc. This device is designed for high precision and low power consumption, making it suitable for a wide range of applications. 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, offering true single-supply capability with an input voltage range extending below the negative rail. This feature allows the AD822 to accommodate input signals below ground while in single-supply mode.
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 Bias Current | VCM = 0 V | 2 to 25 | 2 to 12 | pA |
| Offset Voltage | 0.4 to 2 | 0.3 to 1.5 | mV | |
| Offset Voltage Drift | 2 | 2 | µV/°C | |
| Unity-Gain Bandwidth | 1.8 MHz | 1.8 MHz | ||
| Slew Rate | 3 V/µs | 3 V/µs | ||
| Supply Current | 800 µA | 800 µA | ||
| Supply Voltage Range | ±2.5 V to ±15 V | ±2.5 V to ±15 V | V |
Key Features
- True single-supply capability with input voltage range extending below the negative rail.
- Low power consumption with a supply current of 800 µA per amplifier.
- High precision with an offset voltage of 0.4 mV to 2 mV and an offset voltage drift of 2 µV/°C.
- Low input bias currents below 25 pA and low input voltage noise.
- High common-mode rejection ratio (CMRR) of 66 dB to 80 dB.
- Wide supply voltage range from 5 V to 30 V for single supply and ±2.5 V to ±15 V for dual supplies.
- Available in three package types: PDIP, MSOP, and SOIC_N.
Applications
- Precision instrumentation and measurement systems.
- Medical instrumentation.
- Industrial process controls.
- Strain gauge and bridge amplifier applications.
- Precision data acquisition systems.
Q & A
- What is the input voltage range of the AD822?
The input voltage range of the AD822 extends below the negative rail, allowing it to accommodate input signals below ground in single-supply mode. It ranges from −0.2 V to +4 V.
- What are the typical supply current and power consumption of the AD822?
The AD822 has a typical supply current of 800 µA per amplifier, contributing to its low power consumption.
- What is the common-mode rejection ratio (CMRR) of the AD822?
The CMRR of the AD822 is between 66 dB and 80 dB.
- What is the offset voltage and drift of the AD822?
The offset voltage is between 0.4 mV and 2 mV, and the offset voltage drift is 2 µV/°C.
- What is the unity-gain bandwidth and slew rate of the AD822?
The unity-gain bandwidth is 1.8 MHz, and the slew rate is 3 V/µs.
- In what temperature range does the AD822 operate?
The AD822 operates over the industrial temperature range of −40°C to +85°C.
- What are the available package types for the AD822?
The AD822 is available in PDIP, MSOP, and SOIC_N package types.
- What are some typical applications of the AD822?
The AD822 is used in precision instrumentation, medical instrumentation, industrial process controls, strain gauge and bridge amplifier applications, and precision data acquisition systems.
- What is the maximum supply voltage for the AD822?
The maximum supply voltage for the AD822 is ±18 V.
- How does the AD822 handle output voltage swing?
The output voltage swing of the AD822 extends to within 10 mV of each rail, providing maximum output dynamic range.
