AD621SQ/883B

Instrumentation, Op Amps, Buffer Amps Overview

The AD621SQ/883B is a military-grade instrumentation amplifier manufactured by Analog Devices Inc. It operates within a supply voltage range of ±2.3 V to ±18 V and draws a maximum quiescent current of 1.3 mA. The device features pin-strappable gains of 10 or 100, with an input bias current of 2 nA max and an offset voltage of 75 µV max at gain 10. It provides a bandwidth of 800 kHz at gain 10 and 200 kHz at gain 100, housed in an 8-lead Cerdip package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Pin-strappable gain selection for fixed values of 10 and 100 via external jumper configuration
• Low power consumption suitable for portable applications with minimal supply current draw
• High accuracy specifications including low offset voltage and drift for precision data acquisition
• Robust input overload protection capabilities against continuous overvoltage conditions

Instrumentation, Op Amps, Buffer Amps Applications

• Precision weigh scales
• Transducer interface circuits
• Industrial process controls
• Battery-powered equipment

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific grade suffix 'S' indicates military temperature range performance (-55°C to +125°C). Confirm the '/883B' designation aligns with MIL-STD-883 testing requirements as specified in the manufacturer's military datasheet. Ensure the 8-lead Cerdip package matches the required environmental sealing standards for the intended deployment.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high total system accuracy is required without discrete resistor matching. The internal gain setting resistors simplify design compared to three-op-amp implementations. Consider the low noise density and input bias current characteristics for high source impedance applications such as medical monitoring or bridge sensors.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the AD621 family of low drift, low power instrumentation amplifiers. It shares the same core monolithic architecture as commercial variants but undergoes rigorous screening and testing protocols defined by the 883B standard. The SQ/883B variant specifically targets defense and aerospace sectors requiring extended temperature stability and reliability.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

AD621ARZ

Instrumentation, Op Amps, Buffer Amps FAQ

How is the gain configured on the AD621SQ/883B?

The gain is set internally to 10 by default. To achieve a gain of 100, a single external jumper must connect Pin 1 to Pin 8.

What is the input overload capability of the AD621?

The device can safely withstand continuous input overloads of ±3.0 volts (±6.0 mA) regardless of whether the power is on or off.