Overview
The AD822ARM-REEL, produced by Analog Devices Inc., is a dual precision, low power FET input operational amplifier. This component is designed to operate from a single supply of 5 V to 30 V or from dual supplies of ±2.5 V to ±15 V. It features true single-supply capability, allowing it to accommodate input signals below ground in single-supply mode. The AD822 is known for its high dc precision, low input bias currents, and low input voltage noise, making it suitable for a variety of precision applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | Single Supply | 5 | - | 30 | V |
| Supply Voltage | Dual Supplies | ±2.5 | - | ±15 | V |
| Input Voltage Range | TMIN to TMAX | -0.2 | - | +4 | V |
| Offset Voltage | A Grade | 0.4 | 2 | 0.8 | mV |
| Offset Voltage Drift | - | - | 2 | - | µV/°C |
| Input Bias Current | VCM = 0 V | 2 | - | 25 | pA |
| Unity-Gain Bandwidth | - | - | 1.8 | - | MHz |
| Slew Rate | - | - | 3 | - | V/µs |
| Common-Mode Rejection Ratio (CMRR) | VCM = 0 V to 2 V | 66 | 80 | - | dB |
| Input Impedance (Differential) | - | 10^13 || 0.5 | - | - | Ω || pF |
| Output Saturation Voltage | ISINK = 20 µA | - | - | 5 | mV |
Key Features
- True single-supply capability with input voltage range extending below the negative rail.
- Low input bias currents below 25 pA and low input voltage noise.
- High dc precision with offset voltage of 800 µV maximum and offset voltage drift of 2 µV/°C.
- Unity-gain bandwidth of 1.8 MHz and slew rate of 3 V/µs.
- Low supply current of 800 µA per amplifier.
- High common-mode rejection ratio (CMRR) of 66 dB to 80 dB.
- Available in 8-lead PDIP, MSOP, and SOIC_N packages.
- Operates over the industrial temperature range of −40°C to +85°C.
Applications
- Medical instrumentation
- Low power references and regulators
- Precision data acquisition systems
- Strain gauge and transducer interfaces
- Industrial process controls and automation
- Bridge amplifiers and signal conditioning
Q & A
- What is the supply voltage range for 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 input voltage range for the AD822?
The input voltage range extends below the negative rail, allowing it to accommodate input signals below ground in single-supply mode.
- What are the key dc performance specifications of the AD822?
The AD822 has an offset voltage of 800 µV maximum, offset voltage drift of 2 µV/°C, and input bias currents below 25 pA.
- What is the unity-gain bandwidth and slew rate of the AD822?
The AD822 has a unity-gain bandwidth of 1.8 MHz and a slew rate of 3 V/µs.
- What are the package options for the AD822?
The AD822 is available in 8-lead PDIP, MSOP, and SOIC_N packages.
- What is the operating temperature range for the AD822?
The AD822 operates over the industrial temperature range of −40°C to +85°C.
- What are some common applications for the AD822?
Common applications include medical instrumentation, low power references and regulators, precision data acquisition systems, and industrial process controls.
- How does the AD822 handle common-mode rejection?
The AD822 has a high common-mode rejection ratio (CMRR) of 66 dB to 80 dB.
- What is the input impedance of the AD822?
The differential input impedance is 10^13 Ω || 0.5 pF).
- Is the AD822 sensitive to electrostatic discharge (ESD)?
Yes, the AD822 is ESD sensitive, and proper ESD precautions are recommended to avoid performance degradation or loss of functionality).
