High Precision, Programmable Linear Hall Effect Sensor IC with EEPROM, SENT and PWM Output Protocols, and Advanced Output Linearization


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The A1341 device is a high precision, programmable Hall-effect linear sensor integrated circuit (IC) with a configurable pulse width modulated (PWM) or single edge nibble transmission (SENT) output, for both automotive and nonautomotive applications. The signal path of the A1341 provides flexibility through external programming that allows the generation of an accurate, and customized output voltage from a input magnetic signal. The A1341 provides 12 bits of output resolution, and supports a maximum bandwidth of 3 kHz.

The BiCMOS, monolithic integrated circuit incorporates a Hall sensor element, precision temperature-compensating circuitry to reduce the intrinsic sensitivity and offset drift of the Hall element, a small-signal high-gain amplifier, proprietary dynamic offset cancellation circuits, and advanced output linearization circuitry.

With on-board EEPROM and advanced signal processing functions, the A1341 provides an unmatched level of customer reprogrammable options for characteristics such as gain and offset, bandwidth, output clamps, and output polarity. Multiple input magnetic range and signal offset choices can be preset at the factory. In addition, the device supports separate hot and cold, and 1st and 2nd order temperature compensation.

A key feature of the A1341 is its ability to produce a highly linear device output for nonlinear input magnetic fields. To achieve this, the device divides the output into 32 equal segments and applies a unique linearization coefficient factor to each segment. Linearization coefficients are stored in a look-up table in EEPROM.

The A1341 is available in a lead (Pb) free 4-pin single in-line package (KT suffix), with 100% matte tin leadframe plating.

This device is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last Time Buy, order phase.
Date of status change: September 3, 2018
Recommended Substitutions: Contact Allegro Marketing
  • Advanced 32-segment output linearization functionality enables high output accuracy and linearity in the presence of non-linear input magnetic fields
  • Selectable digital SENT (Single Edge Nibble Transmission) or PWM (Pulse Width Modulation) output
  • SENT output is SAEJ2716 JAN2010 compliant with Allegro Proprietary Enhanced Programmable Features
  • Customer programmable sensitivity offset, bandwidth, output polarity, output clamps, 1st and 2nd order temperature compensation
  • Simultaneous programming of all parameters for accurate and efficient system optimization
  • Factory trimmed magnetic input range (coarse sensitivity) and signal offset
  • Sensitivity temperature coefficient and magnetic offset drift preset at Allegro, for maximum device accuracy without requiring customer temperature testing
  • Temperature-stable, mechanical stress immune, and extremely low noise device output via proprietary four-phase chopper stabilization and differential circuit design techniques
  • Diagnostics for open circuit, overvoltage, and undervoltage
  • Wide ambient temperature range: –40°C to 150°C
  • Operates with 4.5 to 5.5 V supply voltage
  • Allegro Sensor Bias LDO

The A1341 is available in a lead (Pb) free 4-pin single in-line package (KT suffix), with 100% matte tin leadframe plating.

KT Package Documentation

Part Number Specifications and Availability

Documentation and Resources


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