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Automotive MCU handles low-amplitude signals

Posted: 16 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:automotive? MCU? sensor? mixed-signal microcontroller?

MAXQ7670 SoC

Maxim Integrated Products has introduced the newest member of its MAXQ RISC microcontroller product line: the MAXQ7670 SoC, mixed-signal MCU for sensor applications.

A highly sensitive, cost-effective automotive MCU for low-amplitude signals, the MAXQ7670 measures signals in the microvolt range from sensors with differential outputs, such as anisotropic magnetoresistive (AMR) sensors. The MAXQ7670 requires 5mm x 5mm of board space, yet integrates all of the functions needed to accurately measure the low-amplitude signals from multiple AMR sensors without any external amplification. This results in lower system cost (reduced BOM and smaller PCB area). The MAXQ7670 calculates the angle of displacement in real time and outputs the results on a CAN network.

The MAXQ7670 features eight single-ended/four differential inputs, followed by a programmable-gain differential amplifier (1x or 16x) and 250KSps ADC with 10bit resolution. It digitizes sensor outputs for very precise real-world measurements, monitors supply-rail voltage to respond to power failure conditions and integrates a watchdog timer to ensure reliable operation. Its digital interfaces consist of a CAN 2.0B controller, SPI, JTAG and seven general-purpose I/Os. A general-purpose timer with capture, compare and PWM capability is also provided.

The MAXQ7670 includes a 16bit RISC MAXQ microcontroller core, which is enhanced by sixteen 16bit registers. The device can process digitized data and execute user applications at up to 16MIPS. Additionally, the MAXQ7670 integrates 2Kbyte of SRAM for data and 64Kbyte of automotive-grade flash memory.

The new microcontroller is now available. Pricing starts at $3.97 (1,000-up, FOB USA).

- Ismini Scouras

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