Date: 17/03/2010

Quad 16- and 12-bit DAC with internal reference and SPI interface

Linear Technology has introduced the LTC2654, a quad voltage output 16- and 12-bit digital-to-analog converter (DAC family) with internal reference and SPI interface. Linear says LTC2654 DACs achieve 16-bit performance of ±4LSB INL maximum over temperature, a factor of two better than the nearest 16-bit quad competitor with internal reference. LTC2654 has the low offset error of ±2mV (max) and low gain error of 0.1% (max), to ensure accuracy near the supply rails and provides users with a wider effective output range. LTC2654 is suggested for multichannel, open loop and closed loop systems. Applications include mobile communication, process control and industrial automation, automated test equipment (ATE) and automotive systems.

The LTC2654's integrated reference achieves 2ppm/ºC typical and 10ppm/ºC maximum temperature coefficient. LTC2654 offers settling time of 8.9µs for a half-scale step and 3nVs crosstalk. The LTC2654 operates from a single 2.7V to 5.5V supply and communicates via a 4-wire SPI/Microwire compatible interface up to 50MHz.

The LTC2654 offers a wide range of options to meet application specific requirements. Designers can choose between 16- or 12-bit resolution and an internal 1.25V or 2.048V reference, which produce a full-scale output voltage of 2.5V or 4.096V. Alternatively, an external reference up to half the supply voltage can be used for rail-to-rail operation. The LTC2654 includes a hardware option to power up the DAC outputs at zero-scale or mid-scale, allowing more flexibility for designs that cannot be forced to ground when power is first applied. LTC2654 16-bit and 12-bit DACs and demo boards are now available.

Package: 20-pin 4mm x 4mm QFN and 16-pin TSSOP package

Price: Each $4.80 each for the 12-bit options and $11.70 each for the 16-bit options in 1,000-piece quantities.
For more information, visit www.linear.com