A1354

A1354 High Precision 2-Wire Linear Hall Effect Sensor with Pulse Width Modulated Output www.datasheet4u.com Features and Benefits ▪ Designed for automotive, battery-powered applications ▪ Customer programmable quiescent duty cycle, sensitivity, and PWM carrier frequency, through VCC pin ▪ Simultaneous programming of duty cycle, sensitivity, and PWM carrier frequency, for system optimization ▪ Factory programmed sensitivity temperature coefficient and quiescent duty cycle drift ▪ Selectable unidirectional or bidirectional quiescent duty cycles ▪ Pulse width modulated (PWM) output provides increased noise immunity compared to analog output ▪ Temperature-stable quiescent duty cycle output and sensitivity Continued on the next page… Description The A1354 device is a high precision, programmable 2-wire Hall effect linear sensor with a pulse width modulated (PWM) output. The duty cycle (D) of the PWM output signal is proportional to the applied magnetic field. The A1354 device converts an analog signal from its internal Hall sensor 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. The BiCMOS, monolithic circuit inside of the A1354 integrates a Hall 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 circ...