Description
The A1356 device is a high precision, programmable open drain Hall-effect linear sensor IC with a pulse width modulated (PWM) output. The duty cycle (D) of the PWM output signal is proportional to an applied magnetic field. The A1356 device converts an analog signal from its internal Hall element to a digitally encoded PWM output signal. The coupled noise immunity of the digitally encoded PWM output is far superior to the noise immunity of an analog output signal.

Features and Benefits
▪ Simultaneous programming of PWM carrier frequency,
   quiescent duty cycle, and sensitivity; for system
   optimization
▪ Factory programmed sensitivity temperature coefficient
   and quiescent duty cycle drift
▪ Programmability at end-of-line
▪ Pulse width modulated (PWM) output provides increased
   noise immunity compared to an analog output
▪ Precise recoverability after temperature cycling
   • Output duty cycle clamps provide short circuit diagnostic
   capabilities
▪ Optional 50% duty cycle calibration test mode at device
   power up
▪ Wide ambient temperature range: –40°C to 150°C
▪ Resistant to mechanical stress
▪ Advanced chopper stabilization circuits and differential
   signal path design lead to very low output offset levels
▪ Proprietary on-chip filters provide high output resolution
▪ Wide power supply operating range: 4.5 to 18 V