ATS128: Highly Programmable, Back-Biased, Hall-Effect Switch with TPOS Functionality

The ATS128LSE programmable, true power-on state (TPOS), sensor IC is an optimized combination of Hall-effect IC and rare-earth pellet that switches in response to magnetic signals created by ferromagnetic targets in gear-tooth sensing and proximity sensing applications.

These devices offer a wide programming range for the magnetic operate point, BOP. A fixed hysteresis then sets the magnetic release point, BRP, based on the selected BOP.

The devices are externally programmable. A wide range of programmability is available on the magnetic operate point, BOP, while the hysteresis remains fixed. This advanced feature allows optimization of the sensor IC switchpoint and can drastically reduce the effects of mechanical placement tolerances found in production environments.

A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage, which is normally caused by device overmolding, temperature dependencies, and thermal stress. Having the Hall element and amplifier in a single chip minimizes many problems normally associated with low-level analog signals.

This device is ideal for use in gathering speed or position information using gear-tooth–based configurations, or for proximity sensing with ferromagnetic targets.

The ATS128 is provided in a 4-pin SIP. It is lead (Pb) free, with 100% matte tin leadframe plating.


Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504

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  • NewsNews
  • Chopper stabilization for stable switchpoints throughout operating temperature range
  • User-programmable:
    • Magnetic operate point through the VCC pin:
      9 programming bits provide 4-gauss resolution
    • Output polarity
    • Output fall time for reduced EMI in automotive applications
  • On-board voltage regulator for 3 to 24 V operation
  • On-chip protection against:
    • Supply transients
    • Output short-circuits
    • Reverse battery condition
  • True Zero-Speed Operation
  • True Power-On State

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Product Image Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
ATS128LSETN-T 4-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
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