LTC2632HTS8-LI12

Overview

The LTC2632HTS8-LI12 is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 4.5V to 5.5V. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5LSB for the standard grade, a settling time of 4.1µs at 5V, and a supply current of 0.5mA at 3V (typical). The part includes power-on reset circuitry that defaults outputs to mid-scale.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V precision reference (10ppm/°C drift)
• Rail-to-rail output buffers with guaranteed monotonicity
• 3-wire SPI/MICROWIRE serial interface supporting clock rates up to 50MHz
• Power-on reset to mid-scale in internal reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type, temperature grade, and power-on reset behavior. Ensure the supply voltage range meets the 4.5V to 5.5V requirement for the H-grade variant. Confirm RoHS compliance status if required by the design specification.

Selection Notes

Select this component when a dual-channel DAC with high accuracy and low drift is required in a compact footprint. The H-grade designation indicates operation from 4.5V to 5.5V with a 4.096V full-scale output. Compare INL specifications against application requirements; the 'A' grade offers ±1.5LSB max INL, while the standard grade provides ±2.5LSB. Consider the power-on reset behavior (mid-scale vs. zero-scale) based on downstream circuit sensitivity.

Part Context

This part belongs to the LTC2632 family of dual DACs available in 12-, 10-, and 8-bit resolutions. Variants exist with different full-scale voltages (2.5V or 4.096V), temperature grades (Commercial or Automotive), and power-on reset options. The HTS8 suffix denotes the Automotive temperature grade (-40°C to 125°C) and the 8-lead TSOT-23 package.

Replacement Considerations

Direct substitutes within the same family include LTC2632ACTS8-HI12 (Commercial grade, same function) or LTC2632HTS8-LI12 (Lower full-scale voltage). Cross-family replacements require verification of pin compatibility, resolution, and reference architecture.