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.
Allegro's A1341 is a Quality Managed (QM) product that has been developed according to the automotive quality requirements of TS 16949 and contains features targeted for automotive safety applications. This product can be qualified for use in accordance with ISO 26262 in compliant safety systems by ensuring a robust integration of the component into the system design. Safety documentation will be provided to support and guide the integration process.
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