The Melexis MLX90242 is a fix-programmed Linear Hall-Effect sensor with ratio-metric analog output. It features active error correction circuitry (Hall plate quadrature spinning current a chopper-stabilized amplifier), which virtually eliminates the offset errors normally associated with Hall-Effect devices.
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.
For a positive slope, the voltage at the output will increase as a South magnetic filed is applied to the branded face of the MLX90242. Conversely, the voltage output will decrease in the presence of a South magnetic field.
The MLX90242 is available in different versions depending on the nominal sensitivity and the package type (SOT-23 Surface-Mount or 3-SIP-UA Through-Hole).