Integrated SAR ADC eases motor control design

Analog Devices Inc.'s AD7264 device simplifies industrial motor control designs by integrating two successive-approximation (SAR) ADCs, a programmable gain amplifier (PGA) and four comparators on a single chip.

By providing a direct interface for multiple types of sensors, the new ADC solution allows a single, standardized DAQ board to be used in industrial motor drives, replacing as many as three separate boards previously required to perform the same system control function. This integration allows designers to develop simpler, more cost-effective motor control units.

Designed for industrial applications, the AD7264 features two high-speed, low-power SAR ADCs, each providing throughput rates up to 1MSps. The on-chip PGA accepts a true differential analog input, and supports 13 programmable-gain settings from 1 to 128. In addition, the AD7264 includes four on-chip comparators: two optimized for low power, and two optimized for short propagation delays. Operating with a 5V power supply, the device consumes 24mA.

The AD7264 is currently sampling and will be available in full production quantities in January 2008. The AD7264, priced at $9.06 per unit in 1,000-unit quantities, is available in 48-lead LFCSP and 48-lead TQFP packaging. The AD7262, a 12bit pin-compatible solution, is priced at $7.55 per unit in 1,000-unit quantities.