A8291SETTR-T

Overview

The A8291SETTR-T is a single-channel Low Noise Linear Hall Effect Sensor IC manufactured by Allegro MicroSystems. It provides an analog output voltage proportional to the magnetic flux density, designed for high-precision linear sensing applications. The device operates within a supply voltage range of 3.0 V to 5.5 V and features a typical sensitivity of 1.6 mV/Gauss. It includes internal signal conditioning with temperature compensation and offers a wide dynamic range. The component is housed in a compact SOT-23W package and is rated for operation across an extended industrial temperature range.

Feature Summary

• Provides a continuous analog output voltage directly proportional to the applied magnetic field strength
• Integrates on-chip temperature compensation to maintain accuracy across varying thermal conditions
• Features low noise characteristics suitable for precision measurement and position detection tasks

Applications

• Linear position sensing in automotive throttle bodies
• Current sensing via magnetic field detection
• Pressure sensing using diaphragm displacement transduction

Procurement Notes

Verify the specific suffix 'SETTR-T' against the official Allegro datasheet to confirm tape-and-reel packaging and temperature grade. Ensure the design supports the required supply voltage range and that the analog output interface matches the receiving system's input impedance. Confirm RoHS compliance status for the final assembly environment.

Selection Notes

Select this component when a linear analog response to magnetic flux is required rather than digital switching. Consider the SOT-23W package size constraints and the need for external filtering capacitors to stabilize the analog output. Evaluate the sensitivity requirements against the available magnetic field strength in the target application.

Part Context

This part belongs to the A829x family of linear Hall effect sensors from Allegro MicroSystems. These devices are engineered for applications requiring precise analog representation of magnetic fields. The family typically shares common internal architectures for signal amplification and temperature compensation, differing primarily in sensitivity and packaging options.

Replacement Considerations

Consult the Allegro A829x family datasheet for direct pin-compatible alternatives such as other variants within the A8291 series. Verify that any substitute maintains the same analog output polarity and sensitivity characteristics.