AD626AR

Instrumentation, Op Amps, Buffer Amps Overview

The AD626AR is a low-cost, true single-supply differential amplifier designed for amplifying and low-pass filtering small differential voltages from sources with large common-mode voltages. It operates from a single supply of +2.4 V to +10 V or dual supplies of ±1.2 V to ±6 V. The device features pin-selectable gains of 10 and 100, an input common-mode range of 0 V to +54 V, and a typical common-mode rejection ratio (CMRR) of 90 dB. Key electrical parameters include a maximum input offset voltage of 500 µV, a quiescent current of 1.5 mA, and a -3 dB bandwidth of 100 kHz.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Pin-selectable gain configuration allows easy selection between fixed gains of 10 and 100 via external connections.
• Includes integrated RFI filters and series resistive inputs providing protection against continuous overload up to 50 V.
• Supports optional low-pass filtering by connecting a capacitor between the filter pin and analog ground.

Instrumentation, Op Amps, Buffer Amps Applications

• Current sensing
• Interface for pressure transducers
• Position indicators
• Strain gages

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific grade required, as the AD626 family includes AD626A and AD626B variants with different offset voltage specifications. Confirm that the SOIC-8 package matches the design footprint. Ensure the application environment stays within the specified operating temperature range of –40°C to +85°C. Check datasheet limits for absolute maximum ratings before finalizing the design.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high common-mode voltage rejection is needed alongside low power consumption. It is suitable for applications requiring simple gain adjustment without external precision resistors. Consider the 200 kΩ input resistance and ensure source impedance is low to minimize gain error. Verify that the output swing requirements fit within the single or dual supply constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

The AD626AR belongs to the AD626 family of differential amplifiers manufactured by Analog Devices Inc. It is housed in an 8-lead Small Outline IC (SOIC) package. The 'AR' suffix indicates the SOIC package option and the industrial temperature range. This part is distinct from the DIP version (AD626AN) and other grades like the AD626A or AD626B which have tighter offset specifications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct replacements include AD626AN, AD626BN, and AD626BRZ. Verify package compatibility and temperature range specifications when substituting.