explain

AD822 is a dual precision, low-power FET input operational amplifier that can operate from 5V to 30V or from ± 2.5V to ± 15V with dual power sources. It has true single power supply capability, with an input voltage range extending below the negative rail, allowing the AD822 to accommodate underground input signals in single power supply mode. The output voltage swing extends to within 10 mV of each guide rail, providing the maximum output dynamic range.

The maximum offset voltage is 800 µ V, the offset voltage drift is 2 µ V/° C, the input bias current is less than 25 pA, low input voltage noise provides DC accuracy, and the source impedance can reach gigahertz. At a unified gain bandwidth of 1.8 MHz at 10 kHz, -93dB total harmonic distortion (THD), and a 3V/µ s rotation rate, a low supply current of 800 µ A was provided for each amplifier.

The AD822 serves as a follower to drive direct capacitive loads up to 350 pF and provides a minimum output current of 15 mA. This enables the amplifier to handle a wide range of load conditions. Its AC and DC performance, coupled with outstanding load driving ability, leads to a particularly versatile amplifier for single power users.

AD822 has two performance levels. The rated levels of Class A and Class B exceed the industrial temperature range of -40 ° C to+85 ° C.

AD822 comes in three types of 8-lead packaging: PDIP, MSOP, and SOIC_ N.

FEATURES

True single-supply operation
Output swings rail-to-rail
Input voltage range extends below ground
Single-supply capability from 5 V to 30 V
Dual-supply capability from ±2.5 V to ±15 V
High load drive
Capacitive load drive of 350 pF, G = +1
Minimum output current of 15 mA
Excellent ac performance for low power
800 µA maximum quiescent current per amplifier
Unity-gain bandwidth: 1.8 MHz
Slew rate of 3 V/μs
Good dc performance
800 µV maximum input offset voltage
2 µV/°C typical offset voltage drift
25 pA maximum input bias current
Low noise
13 nV/√Hz at 10 kHz
No phase inversion
APPLICATIONS
Battery-powered precision instrumentation
Photodiode preamps
Active filters
12-bit to 14-bit data acquisition systems
Medical instrumentation

Low power references and regulators