Features

• 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

Typical Application

Description

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.