Features

• 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: 0.75mV_P-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

Typical Application

Description

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.