LTC2631HTS8-HZ12#TRPBF

Overview

The LTC2631HTS8-HZ12#TRPBF 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, requiring a supply voltage between 4.5V and 5.5V. The device supports a 400kHz I2C interface and includes a power-on reset circuit configured to clear the output to zero-scale upon initialization. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSBs, a typical settling time of 4.6µs at ±1LSB, and a supply current of approximately 200µA at 5V with the internal reference active.

Feature Summary

• Integrated 10ppm/°C precision reference providing 4.096V full-scale output
• Bidirectional REF pin allows for external reference input or buffered reference output
• Power-on reset function clears DAC output to zero-scale
• 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 that the H-grade designation confirms the –40°C to 125°C operating temperature range required for the application. Ensure the system power supply remains within the 4.5V to 5.5V window specified for the H-series variant. Confirm the Z-suffix indicates the zero-scale power-on reset behavior matches the system startup requirements. Check the TRPBF suffix for tape and reel packaging compatibility with automated assembly lines.

Selection Notes

Select this part when a 12-bit resolution and high accuracy are needed in a compact TSOT-23 footprint. The H-grade is necessary for automotive or wide-temperature industrial environments compared to C or I grades. Choose the Z-reset variant if a known zero-voltage state is critical immediately after power-up. Consider the LTC2631-L series if the application operates on lower voltages (2.7V–5.5V) with a 2.5V full-scale output.

Part Context

This component belongs to the LTC2631 family of single-channel I2C DACs. The HTS8-HZ12#TRPBF specifically denotes the H-temperature grade, TSOT-23 package, zero-scale reset, and 12-bit resolution. Other family members include L-series variants for lower voltage applications and M-reset variants for mid-scale initialization. The family shares identical pinouts and I2C command structures, allowing for potential software-compatible upgrades or downgrades based on accuracy and voltage needs.

Replacement Considerations

Direct replacements within the same family include LTC2631HTS8-LZ12#TRPBF for lower voltage operation or LTC2631ITS8-HZ12#TRPBF for industrial temperature ranges. Verify that any substitute maintains the 4.096V full-scale requirement and the zero-scale power-on reset characteristic to ensure system compatibility without hardware modifications.