Quad 12-/10-/8-Bit IC V DACs with 10ppm/°C Reference

The LTC2635 is a family of quad 12-, 10-, and 8-bit voltage-output DACs with an integrated, high-accuracy, low-drift reference in a 16-pin QFN or a 10-lead MSOP package. It has rail-to-rail output buffers and is guaranteed monotonic. The LTC2635-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2635-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the fullscale output to the external reference voltage.

These DACs communicate via a 2-wire I2C-compatible serial interface. The LTC2635 operates in both the standard mode (clock rate of 100kHz) and the fast mode (clock rate of 400kHz). The LTC2635 incorporates a power-on reset circuit. Options are available for reset to zero-scale, reset to mid-scale in internal reference mode, reset to mid-scale in external reference mode, or reset with all DAC outputs in a high-impedance state after power-up.

Applications

* Mobile Communications

* Process Control and Industrial Automation

* Power Supply Margining

* Portable Equipment

* Automotive

* Integrated Precision Reference

* 2.5V Full-Scale 10ppm/°C (LTC2635-L)

* 4.096V Full-Scale 10ppm/°C (LTC2635-H)

* Maximum INL Error: ±2.5 LSB (LTC2635-12)

* Power-On-Reset to Zero-Scale/Mid-Scale/Hi-Z

* Low Noise: 0.75mVP-P 0.1Hz to 200kHz

* Guaranteed Monotonic Over –40°C to 125°C Automotive Temperature Range

* Selectable Internal or External Reference

* 2.7V to 5.5V Supply Range (LTC2635-L)

* Ultralow Crosstalk Between DACs (3nV•s)

* Low Power: 0.6mA at 3V

* Double-Buffered Data Latches

* Small 16-Pin 3mm × 3mm QFN and 10-Lead MSOP Packages