Octal 16-bit ADC with 1²C interface

27 July 2005 Analogue, Mixed Signal, LSI

Linear Technology's LTC2605 is an octal 16-bit voltage output DAC with an I²C serial interface in a 16-pin SSOP package - same board area as an SO-8. At 16-bits, the company claims it is the industry's smallest footprint for an octal DAC while improving DC performance. The device's guaranteed monotonic performance, small size and low power make it ideal for digital calibration, trim/adjust and level setting applications in a variety of products. The LTC2605's output buffers deliver superior drive capability over the entire 2,7 to 5,5 V supply range. It can directly drive capacitive loads up to 1000 pF or current loads up to 15 mA and maintain good linearity to within millivolts of rail. The low 9 mV output offset provides a starting code voltage close to ground. Low output voltage noise (15 μVp-p) reduces the need for output filtering. Full-scale transition on seven of the eight DACs causes less than 10 μV change in the eighth DAC - eliminating crosstalk error. The low 250 μA supply current per DAC at 3 V and 1 μA shutdown current make it ideal for battery-powered applications.

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