LTC2631ITS8-HM10#TRPBF

Overview

The LTC2631ITS8-HM10#TRPBF is a single 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 4.096V, requiring a supply voltage between 4.5V and 5.5V. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum Integral Nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.2µs at 5V, and a power-down current of 1.8µA maximum for the I-grade. The part includes a power-on reset circuit configured to initialize the output to mid-scale.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• I²C interface with selectable addresses and 400kHz clock rate support
• Power-on reset to mid-scale option (suffix HM)
• Guaranteed monotonic operation over the full operating temperature range

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automotive electronic modules
• Optical networking signal conditioning

Procurement Notes

Verify the specific ordering suffixes against the manufacturer's datasheet to confirm pinout compatibility and functional parameters. The 'HM' suffix indicates a mid-scale power-on reset configuration, while 'H' denotes the automotive temperature grade (-40°C to 125°C). Ensure the supply voltage meets the minimum 4.5V requirement for the H-grade variant. Confirm that the I²C address pins are correctly terminated if multiple devices share the bus.

Selection Notes

Select this component when a compact 10-bit DAC with an internal high-accuracy reference is required for space-constrained designs. The H-grade temperature rating makes it suitable for automotive applications where operation up to 125°C is necessary. Compare INL specifications against application tolerance requirements; this model offers ±1 LSB maximum INL. Consider the external reference mode capability if system-level calibration or a different full-scale voltage is preferred over the internal 4.096V setting.

Part Context

This part belongs to the LTC2631 family of single-channel voltage-output DACs. The family encompasses 8-, 10-, and 12-bit resolutions with options for 2.5V or 4.096V full-scale outputs. Variants differ by temperature grade (C, I, H), power-on reset behavior (Z for zero, M for mid-scale), and accuracy class (A grade for tighter linearity). The LTS8 package provides a small footprint suitable for dense PCB layouts.

Replacement Considerations

Direct replacements within the same family include LTC2631ITS8-LM10#TRPBF for lower voltage operation (2.7V–5.5V) or LTC2631ITS8-HZ10#TRPBF for zero-scale reset initialization. Cross-family comparisons should verify I²C compatibility and pinout alignment.