LTC2631HTS8-HM12#TRMPBF

Overview

The LTC2631HTS8-HM12#TRMPBF is a single 12-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 yielding a full-scale output of 4.096V and operates on a 4.5V to 5.5V supply. The device includes a rail-to-rail buffered output, guaranteed monotonicity, and a 2-wire I²C interface supporting up to 400kHz. Key electrical parameters include a maximum integral nonlinearity (INL) of ±2.5 LSB, a typical settling time of 4.6µs at ±1LSB, and a power-on reset function that defaults the output to mid-scale.

Feature Summary

• Integrated 10ppm/°C precision reference with 4.096V full-scale output
• Bidirectional REF pin allows external reference input or internal reference output
• Power-on reset circuit configured to set output to mid-scale upon power-up
• Guaranteed monotonic operation over the –40°C to 125°C temperature range

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the H-grade designation confirms the automotive temperature range of –40°C to 125°C and the HM suffix indicates the mid-scale power-on reset configuration. Confirm the TRMPBF suffix corresponds to the 500-unit tape and reel packaging option. Ensure the specific lot matches the required lead-free and RoHS compliance standards for the target assembly process.

Selection Notes

Select this part when a 12-bit resolution with a 4.096V span is required within a compact TSOT-23 footprint. The H-grade is necessary for applications operating above 85°C. Choose the HM variant if system initialization requires the DAC output to settle at mid-scale rather than zero-scale after power cycling. Verify that the supply voltage remains within the 4.5V to 5.5V window for specified performance.

Part Context

This component belongs to the LTC2631 family of single-channel I²C DACs. The family offers variations in resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and temperature grades (Commercial, Industrial, Automotive). The HTS8 suffix specifically identifies the H-grade automotive version in the ThinSOT-23 package.

Replacement Considerations

Direct substitutes within the same package and specification profile include the LTC2631HTS8-LM12#TRMPBF for a 2.5V full-scale output or the LTC2631HTS8-HZ12#TRMPBF for a zero-scale power-on reset. Cross-family replacements require verification of I²C compatibility and physical pin alignment.