ATS688LSN: Two-Wire, Zero-Speed Differential Gear Tooth Sensor IC

Description

The ATS688LSN is an optimized Hall-effect integrated circuit (IC), rare-earth pellet, and high-temperature ceramic capacitor in a single overmolded package, reducing the need for external EMC protection. The ATS688LSN provides a user-friendly solution for true zero-speed digital gear tooth sensing in two-wire applications.

The single integrated circuit incorporates a dual element Hall-effect sensor IC and signal processing circuitry that switches in response to differential magnetic signals created by a rotating ferromagnetic target. The device contains a sophisticated compensating circuit to eliminate magnetic and system offsets. Digital tracking of the analog signal is used to achieve true zero-speed operation.Advanced calibration algorithms are used to adjust the device gain and offset at power-up, resulting in air gap independent switchpoints, which greatly improves output accuracy and mitigates the effect of system anomalies such as target vibration and sudden changes in air gap.

The regulated current output is configured for two-wire operation. This sensor IC is ideal for obtaining edge and duty cycle information in gear-tooth–based applications such as wheel speed.

The ATS688LSN is provided in a lead (Pb) free 3-pin backbiased SIP package (suffix SN) with tin leadframe plating. The ATS688LSN provides a user-friendly solution for true zero-speed digital gear tooth sensing in two-wire applications, such as automotive or two-wheeler braking systems.

Top Features

  • Integrated capacitor reduces requirements for external EMI protection components
  • Fully optimized differential digital gear tooth sensor IC
  • Running mode lockout
  • AGC and reference adjust circuit
  • Air gap independent switchpoints
  • Digital output representing target mechanical profile
  • Precise duty cycle throughout operating temperature range
  • Short power-on time
  • Large operating air gap capability
  • True zero-speed operation
  • Undervoltage lockout (UVLO)
  • Wide operating voltage range
  • Internal current regulator for two-wire operation
  • Robust test coverage capability with Scan Path and IDDQ measurements
  • Single-chip sensing IC for high reliability
  • Integrated rare-earth pellet

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
ATS688LSNTN-H-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
ATS688LSNTN-L-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Packaging

ATS688 Packages