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Sensor signal processors

MAXQ7665/MAXQ7666 are mixed-signal microcontrollers that process signals from magnetic (magnetoresistive) sensors with an accuracy of up to 8 µV and transmit processed analogue and/or digital data. They suit automotive body electronics and industrial position/ displacement applications, using AMR (anisotropic magnetoresistive) sensors in contactless sensing of linear or angular position/displacement. They have an eight-channel differential input, a programmable-gain amplifier (up to 32X) and a 12-bit, 500-ksps ADC, with both local-die and remote temperature sensing. Maxim based them on its 16- bit RISC MAXQ microcontroller core, which features a 16X16 hardware multiplier and a 48-bit accumulator. Power demand is 0.25 mA per MIPS, and as well as integrating 512 bytes of SRAM for data, the MAXQ7665 has 64 kbytes and the MAXQ7666, 16 kbytes of automotive- grade flash memory. Both analogue and digital outputs are available from either an on-chip 12-bit voltage DAC with a buffered output, a UART port—for LIN 2.0 communication— eight general-purpose I/Os, or a CAN 2.0B-compliant interface. Prices start at $7.83 for the MAXQ7665 and $7.49 for the MAXQ7666 (1000).

Maxim, www.maxim-ic.com