AD622ARZ-RL

低成本仪表放大器 Low Cost Instrumentation Amplifier

Product Details

The AD622 is a low cost, moderately accurate instrumentation amplifier in the traditional pin configuration that requires only one external resistor to set any gain between 2 and 1000. For a gain of 1, no external resistor is required. The AD622 is a complete difference or subtractor amplifier system that also provides superior linearity and common-mode rejection by incorporating precision laser-trimmed resistors.

The AD622 replaces low cost, discrete, two or three op amp instrumentation amplifier designs and offers good common-mode rejection, superior linearity, temperature stability, reliability, power, and board area consumption. The low cost of the AD622 eliminates the need to design discrete instrumentation amplifiers to meet stringent cost targets. While providing a lower cost solution, it also provides performance and space improvements.

**Applications**

.

Transducer interface

.

Low cost thermocouple amplifier

.

Industrial process controls

.

Difference amplifier

.

Low cost data acquisition

### Features and Benefits

.

Easy to use

.

Low cost solution

.

Higher performance than two or three op amp design

.

Unity gain with no external resistor

.

Optional gains with one external resistor

Gain range: 2 to 1000

.

Wide power supply range: ±2.6 V to ±15 V

.

Available in 8-lead PDIP and 8-lead SOIC_N packages

.

Low power, 1.5 mA maximum supply current

.

DC performance

0.15% gain accuracy: G = 1

125 μV maximum input offset voltage

1.0 μV/°C maximum input offset drift

5 nA maximum input bias current

66 dB minimum common-mode rejection ratio: G = 1

.

Noise

12 nV/√Hz @ 1 kHz input voltage noise

0.60 μV p-p noise: 0.1 Hz to 10 Hz, G = 10

.

AC characteristics

800 kHz bandwidth: G = 10

10 μs settling time to 0.1% @ G = 1 to 100

1.2 V/μs slew rate