Overview
The AD822ARMZ-REEL, produced by Analog Devices Inc., is a dual precision, low power FET input operational amplifier. This op amp 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, making it versatile for various applications. It features true single-supply capability, allowing the input voltage range to extend below the negative rail, which is particularly useful for accommodating input signals below ground in single-supply mode. The AD822 is available in several 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 | A Grade | B Grade | Unit |
|---|---|---|---|---|
| Supply Voltage | ±18 V | ±18 V | V | |
| 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 dB | 66 to 80 dB | dB |
| Input Impedance (Differential) | 10^13 || 0.5 pF | 10^13 || 0.5 pF | Ω || pF | |
| Input Impedance (Common Mode) | 10^13 || 2.8 pF | 10^13 || 2.8 pF | Ω || pF | |
| Output Saturation Voltage | ISINK = 20 µA | 5 to 7 mV | 5 to 7 mV | mV |
| Unity-Gain Bandwidth | 1.8 MHz | 1.8 MHz | MHz | |
| Total Harmonic Distortion (THD) | at 10 kHz | −93 dB | −93 dB | dB |
| Slew Rate | 3 V/µs | 3 V/µs | V/µs | |
| Supply Current per Amplifier | 800 µA | 800 µA | µA | |
| Offset Voltage | 0.4 to 2 mV | 0.3 to 1.5 mV | mV | |
| Offset Voltage Drift | 2 µV/°C | 2 µV/°C | µV/°C | |
| Input Bias Current | VCM = 0 V | 2 to 25 pA | 2 to 12 pA | pA |
Key Features
- Dual Precision, Low Power FET Input Op Amp: The AD822 features a dual precision design with low power consumption, making it suitable for a wide range of applications.
- Single and Dual Supply Operation: It can operate from a single supply of 5 V to 30 V or from dual supplies of ±2.5 V to ±15 V.
- True Single-Supply Capability: The input voltage range extends below the negative rail, allowing for input signals below ground in single-supply mode.
- High Input Impedance: Differential and common-mode input impedances are very high, suitable for high-impedance sources.
- Low Input Bias Current: Input bias currents are below 25 pA, ensuring minimal loading of the input signal source.
- Low Noise and Distortion: The op amp features low input voltage noise and total harmonic distortion (THD) of −93 dB at 10 kHz.
- High Slew Rate and Bandwidth: A slew rate of 3 V/µs and a unity-gain bandwidth of 1.8 MHz are provided.
- Rail-to-Rail Output Swing: The output voltage swing extends to within 10 mV of each rail, maximizing the output dynamic range.
- Multiple Package Options: Available in 8-lead PDIP, MSOP, and SOIC_N packages.
Applications
- Precision Instrumentation: Suitable for precision measurement and instrumentation due to its high input impedance and low input bias current.
- Medical Devices: Used in medical equipment where high accuracy and low noise are critical.
- Aerospace and Defense: Applicable in aerospace and defense systems requiring high reliability and precision.
- Industrial Automation: Employed in industrial automation for precise signal conditioning and amplification.
- Audio Equipment: Used in high-quality audio equipment to ensure low distortion and high fidelity.
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 are the key features of the AD822's input stage?
The AD822 features a FET input stage with high input impedance, low input bias current, and the ability to handle input signals below ground in single-supply mode.
- What is the unity-gain bandwidth of the AD822?
The unity-gain bandwidth of the AD822 is 1.8 MHz.
- What is the slew rate of the AD822?
The slew rate of the AD822 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 operating temperature range for the AD822?
The AD822 is rated over the industrial temperature range of −40°C to +85°C.
- What is the typical supply current per amplifier for the AD822?
The typical supply current per amplifier for the AD822 is 800 µA.
- What is the maximum offset voltage for the AD822?
The maximum offset voltage for the AD822 is 2 mV for the A grade and 1.5 mV for the B grade.
- What is the total harmonic distortion (THD) of the AD822 at 10 kHz?
The total harmonic distortion (THD) of the AD822 at 10 kHz is −93 dB.
- Is the AD822 suitable for high-impedance sources?
Yes, the AD822 is suitable for high-impedance sources due to its high input impedance and low input bias current.
