Features

• Integrated Precision Reference
  2.5V Full-Scale 10ppm/°C (LTC2640-L)
  4.096V Full-Scale 10ppm/°C (LTC2640-H)
• Maximum INL Error: 1LSB (LTC2640A-12)
• Bidirectional Reference: Input or 10ppm/°C Output
• Low Noise (0.7mVpp, 0.1Hz to 200kHz)
• Guaranteed Monotonic Over Temperature
• 2.7V to 5.5V Supply Range (LTC2640-L)
• Low Power Operation: 180μA at 3V
• Power Down to 1.8μA Maximum (C and I Grades)
• Asynchronous DAC Clear Pin (LTC2640-Z)
• Power-On Reset to Zero or Mid-Scale options
• Double-Buffered Data Latches
• Guaranteed Operation from –40°C to 125°C (H-Grade)
• 8-Lead TSOT-23 (ThinSOT™) Package

Typical Application

Description

The LTC®2640 is a family of 12-, 10-, and 8-bit voltageoutput DACs with an integrated, high-accuracy, low-drift reference in an 8-lead TSOT-23 package. It has a rail-to-rail output buffer that is guaranteed monotonic.

The LTC2640-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2640-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. A 10ppm/°C reference output is available at the REF pin.

Each DAC can also operate in External Reference mode, in which a voltage supplied to the REF pin sets the fullscale output.

The LTC2640 DACs use a SPI/MICROWIRE™ compatible 3-wire serial interface which operates at clock rates up to 50MHz.

The LTC2640 incorporates a power-on reset circuit. Options are available for Reset to Zero-Scale or Reset to Mid-Scale after power-up.