Features

• Integrated Precision Reference
  2.5V Full-Scale 10ppm/°C (LTC2632-L)
  4.096V Full-Scale 10ppm/°C (LTC2632-H)
• Maximum INL Error: ±1LSB (LTC2632A-12)
• Low Noise: 0.75mVP-P 0.1Hz to 200kHz
• Guaranteed Monotonic –40°C to 125°C Automotive Temperature Range
• Selectable Internal or External Reference
• 2.7V to 5.5V Supply Range (LTC2632-L)
• Low Power Operation 0.4mA at 3V
• Power-On-Reset to Zero-Scale/Mid-Scale
• Double-Buffered Data Latches
• 8-Lead ThinSOT™ Package

Typical Application

Description

The LTC2632 is a family of dual 12-, 10-, and 8-bit voltage output DACs with an integrated, high-accuracy, low-drift reference in an 8-lead TSOT-23 package. It has rail-to-rail output buffers and is guaranteed monotonic.

The LTC2632-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2632-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 full-scale output to the external reference voltage.

These DACs communicate via a simple SPI/MICROWIRE compatible 3-wire serial interface which operates at clock rates up to 50MHz. The LTC2632 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.