Data converter is the first with dynamic power control

Data converter is the first with dynamic power control

Offered as the first of its kind to feature dynamic power control circuitry, the AD5755 data converter integrates four precision 16-bit D/A converters with programmable voltage or 4 to 20-mA output drivers. The unparalleled combination of features supports four times more channels than any other integrated converter, enabling up to four times more terminals at twice the performance in a single analog I/O module. The new converter also lowers power consumption by 80% and net thermal rise (silicon temperature minus ambient temperature) by 75% compared to other control driver technologies.

The dynamic power control feature works by continually sensing the load impedance and delivering the required power to the load while minimizing power loss in the rest of the system. This reduces self-heating and temperature elevation.

The device offers a full-channel spec with a maximum total unadjusted error of 0.05%, a relative accuracy of ±0.003% max, and does not require system calibration. The device, which supports standard industrial voltage and current output ranges, can be used with standard HART (Highway Addressable Remote Transducer) protocol modems.

Also integrated on-chip is a 5-ppm/°C internal reference, user-accessible offset and gain registers, and a 30-MHz SPI-compatible interface. Operating temperature is from –40° to 105°C. The device is housed in a 64-pin LFCSP package. ($13.35 ea/1,000 — available now.)

Analog Devices , Wilmington , MA
Customer Service 800-262-5643
http://www.analog.com