Maxim : Automotive mixed-signal controllers process magnetic sensor signals -

Maxim : Automotive mixed-signal controllers process magnetic sensor signals


Maxim Integrated Products introduces the newest members of its RISC MAXQ(R) microcontroller product line: the MAXQ7665/MAXQ7666* system-on-chip (SoC), mixed-signal microcontrollers for sensor applications. Designed for use with anisotropic magnetoresistive (AMR) sensors, the devices provide 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/MAXQ7666 are 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/MAXQ7666 feature an 8-channel differential input, followed by a programmable-gain amplifier (up to 32x) and a 12-bit, 500ksps ADC. These devices digitize sensor outputs with an accuracy of up to 8 microvolts, enabling very precise real-world measurements. To ensure precision during operation, the MAXQ7665/MAXQ7666 feature both local-die and remote temperature sensing, which allow for temperature compensation of the sensor output. These devices also monitor the supply-rail voltage to respond to power-failure conditions, and they integrate a watchdog timer and three timers with input-capture and output-compare capabilities to ensure reliable operation.

The MAXQ7665/MAXQ7666 embed a 16-bit RISC MAXQ microcontroller core, which is enhanced by a 16 x 16 hardware multiplier and 48-bit accumulator. The devices 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.

The MAXQ7665/MAXQ7666 are available in a space-saving, 7mm x 7mm, 48-pin TQFN package and are fully specified over the -40 degrees Celsius to +125 degrees Celsius automotive temperature range. Prices start at $7.83 for the MAXQ7665 and $7.49 for the MAXQ7666 (1000-up, FOB USA). An evaluation kit is available to speed designs. The kit includes an evaluation board and a PC-based integrated development environment (IDE). The IDE provides a debugger, assembler/linker, a time-limited version of the IAR C compiler, and a simulator. Maxim's website offers many application notes and software examples to use with the evaluation kit (

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells over $2 billion of high-performance semiconductor products annually. It was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, Maxim has developed over 5600 products serving the industrial, communications, consumer, and computing markets. For more information, go to

A Data Sheet for this product is available at

Drew Ehrlich
Senior Public Relations Specialist
Maxim Integrated Products
Phone: 408-331-4252
Fax: 408-331-4132

Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.

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