AD620 High Accuracy Instrumentation Amplifier IC | Analog Devices | Low Power, Precision Op Amp

AD620 – Low Power, High Accuracy Instrumentation Amplifier

The AD620 is a low-cost, high-accuracy instrumentation amplifier that requires only one external resistor to set gains from 1 to 10,000. Its compact 8-lead SOIC and DIP packaging reduces board space while offering low power consumption (only 1.3 mA max), making it ideal for portable and battery-powered applications.

With 40 ppm max nonlinearity, 50 μV max offset voltage, and 0.6 μV/°C offset drift, the AD620 delivers exceptional precision for data acquisition systems, medical instrumentation, and transducer interfaces.

The use of Superβeta processing enables ultra-low input bias current (1.0 nA max), ensuring superior performance in high-impedance sensor applications. In addition, its low noise (9 nV/√Hz at 1 kHz, 0.28 μV p-p from 0.1–10 Hz) and fast 15 μs settling time (to 0.01%) make it an excellent choice for multiplexed systems and preamplifier designs.

Key Features

• Low cost, precision instrumentation amplifier

• Gain range: 1 to 10,000 (set by one external resistor)

• Supply current: 1.3 mA max – optimized for low-power designs

• Offset voltage: 50 μV max, drift: 0.6 μV/°C max

• Low input bias current: 1.0 nA max

• Noise: 9 nV/√Hz at 1 kHz, 0.28 μV p-p (0.1–10 Hz)

• Settling time: 15 μs to 0.01%

• Packaging: 8-lead SOIC / DIP

Applications

• Precision data acquisition systems

• Weigh scales and transducer interfaces

• ECG, noninvasive blood pressure monitors, and other medical instrumentation

• Portable, battery-powered, and remote sensing equipment

• Multiplexed data acquisition systems

• Low-noise preamplifiers