AD22057R

Overview

The AD22057R is a single-supply difference amplifier designed for amplifying and low-pass filtering small differential voltages from sources with large common-mode voltages. It features a default overall gain of 20, alterable via external resistors to a range between 1 and 3160. The device operates on a supply voltage of +3.0 V to +36 V, with an input common-mode range extending from below ground to 6 times (VS – 1 V). Key specifications include a differential input resistance of 400 kΩ, a quiescent supply current of 200 µA, and an operating temperature range of –40°C to +125°C. It includes transient spike protection, RFI filters, and an accurate midscale offset capability.

Feature Summary

• Single-supply operation with extended common-mode input range allowing measurement of voltages significantly higher than the supply rail.
• Integrated preamplifier and output buffer with factory-trimmed baseline gain and provisions for user-adjustable gain scaling.
• Built-in low-pass filtering architecture supporting one-, two-, or three-pole configurations using minimal external components.
• Robust protection features including transient spike tolerance, reversed supply protection, and integrated RF interference filters.

Applications

• Current sensing interfaces for solenoids and power transistors in automotive systems
• Motor control signal conditioning
• Interface circuits for pressure transducers, position indicators, and strain gages
• Accelerometer signal processing

Procurement Notes

Verify the specific suffix 'R' indicates reel packaging when sourcing. Confirm the manufacturer designation as Analog Devices Inc. Ensure the component meets the specified industrial temperature range requirements for your application environment before finalizing procurement.

Selection Notes

Select this component when interfacing low-level differential signals with high common-mode voltages in single-supply environments. Consider the adjustable gain range if transducer scaling errors require compensation. Evaluate the need for internal filtering versus external solutions based on the required noise attenuation characteristics.

Part Context

The AD22057R belongs to the AD22057 family of single-supply sensor interface amplifiers manufactured by Analog Devices. It is functionally identical to the AD22057N and AD22057Z variants, differing primarily in packaging configuration. The 'R' suffix specifically denotes tape-and-reel packaging suitable for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs if considering alternative sensors or amplifiers.