linear position sensor / magnetic / Hall effect / PWM
magnetic, Hall effect, PWM
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.