The Melexis MLX90215 is a Programmable Linear Hall-Effect sensor with ratio-metric analog output.
All magnetic response functions of the MLX90215 are fully programmable for versatility and system tolerance reduction (End-Of-Line calibration).
The quiescent output voltage Vog (i.e. Vout @ B=0 Gauss), sensitivity, the magnitude of sensitivity drift over temperature (TC), the clamping levels are all programmable through the connector terminals (Vdd-Vss-Out).
It features active error correction circuitry (quadrature spinning current and chopper-stabilized amplification) which virtually eliminates the offset errors normally associated with Hall-Effect devices. The MLX90215 has a very stable thermal compensation for both the sensitivity and the Vog over the broad temperature range.
The ratio-metric output voltage is proportional to the supply voltage. When using the supply voltage as a reference for an A/D converter, fluctuations of ±10% in supply voltage will not affect accuracy. When programmed for a conventional sensitivity (with a positive gain), the voltage at the output will increase as a south magnetic field is applied to the branded face of the MLX90215.
Conversely, the voltage output will decrease in the presence of a north magnetic field. The MLX90215 has a sensitivity drift of less than +1% error and VOQ stability drift of less than +0,4% error over a broad temperature range.