16-bit octal SPI DAC achieves ±4-LSB INL max

16-bit octal SPI DAC achieves ±4-LSB INL max

The 16-bit LTC2656 octal D/A converter offers ±4-LSB INL max over temperature — claimed by the company to be three times better than the nearest octal competitor. The DAC offers a 0.1% max gain error and a ±2-mV max offset, allowing it to remain accurate near the supply rails and providing the user with a wider effective output range.

The part integrates a precision reference that achieves 2-ppm/°C typ and 10-ppm/°C max temperature coefficient. Additional features include a supply voltage from 2.7 to 5.5 V, a supply current of 375 µA per DAC with the reference activated, a crosstalk of less than 1 nV•s, and a low noise of 8 µVp-p (0.1 to 10 Hz).

Designers can choose between 16- or 12-bit resolution and an internal 1.25- or 2.048-V reference, which produces a full-scale output voltage of 2.5 or 4.096 V. Housed in 20-pin QFN and TSSOP packages, the LTC2656 communicates via a four-wire SPI-compatible interface up to 50 MHz. The LTC2656 is available, along with the LTC2657, an I2 C-compatible 16-bit octal DAC. (Ea/1,000: 12-bit DACs, from $8.95; 16-bit DACs, $17.95 samples available now.)

Linear Technology , Milpitas , CA
Literature 800-4-LINEAR
http://www.linear.com