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

The LTC2637 is a family of octal 12-, 10-, and 8-bit voltage-output DACs with an integrated, high-accuracy, low-drift 10ppm/°C reference in 14-lead DFN and 16-lead MSOP packages. It has a rail-to-rail output buffer and is guaranteed monotonic. The LTC2637-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2637-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 DAC full-scale output to the external reference voltage.

These DACs communicate via a 2-wire I2C-compatible serial interface. The LTC2637 operates in both the standard mode (clock rate of 100kHz) and the fast mode (clock rate of 400kHz). The LTC2637 incorporates a power-on reset circuit. Options are available for reset to zero-scale or reset to mid-scale in internal reference mode, or reset to mid-scale in external reference mode after power-up.

Applications

* Mobile Communications

* Process Control and Industrial Automation

* Automatic Test Equipment

* Portable Equipment

* Automotive

* Optical Networking

* Integrated Precision Reference:

* 2.5V Full-Scale 10ppm/°C (LTC2637-L)

* 4.096V Full-Scale 10ppm/°C (LTC2637-H)

* Maximum INL Error: 2.5LSB (LTC2637-12)

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

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

* Selectable Internal or External Reference

* 2.7V to 5.5V Supply Range (LTC2637-L)

* Ultralow Crosstalk Between DACs (<3nV•s)

* Low Power: 100μA per DAC at 3V (LTC2637-L)

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

* Double-Buffered Data Latches

* Tiny 14-Lead 4mm × 3mm DFN and 16-Lead MSOP Packages