MAXQ7665 - 16-Bit RISC MCU-Based Smart Data-Acquisition System

Maxim Integrated Products introduces the newest member of its RISC MAXQ® microcontroller product line: the MAXQ7665 system-on-chip (SoC), mixed-signal microcontroller for sensor applications. Designed for use with anisotropic magnetoresistive (AMR) sensors, the device provides a complete system solution for the contactless sensing of linear or angular position/displacement. Requiring only 7mm x 7mm of board space, these compact microcontrollers integrate all of the functions needed to accurately measure the low-amplitude signals of AMR sensors, and provide analog and/or digital outputs. Designed to digitize and process signals in harsh, space-constrained environments, the MAXQ7665 is ideal for automotive applications such as steering, braking, and throttle position control, as well as industrial control applications such as valve positioning and shaft rotation.

The MAXQ7665 features an 8-channel differential input, followed by a programmable-gain amplifier (up to 32x) and a 12-bit, 500ksps ADC. It digitizes sensor outputs with an accuracy of up to 8µV, enabling very precise real-world measurements. To ensure precision during operation, the MAXQ7665 features both local-die and remote temperature sensing, which allow for temperature compensation of the sensor output. The device also monitors the supply-rail voltage to respond to power-failure conditions, and it integrates a watchdog timer and three timers with input-capture and output-compare capabilities to ensure reliable operation.

The MAXQ7665 embeds a 16-bit RISC MAXQ microcontroller core, which is enhanced by a 16 x 16 hardware multiplier and 48-bit accumulator. The device can process digitized data and execute user applications at up to 1MIPS per MHz, while consuming only 0.25mA per MIPS. In addition to integrating 512 bytes of SRAM for data, the MAXQ7665 offers 64kB and the MAXQ7666 offers 16kB of automotive-grade flash memory. Both analog 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.

An evaluation kit is available to speed designs. Maxim's website offers many application notes and software examples to use with the evaluation kit: www.maxim-ic.com/maxq