LTC2635HUD-HMI12#TRPBF

Overview

The LTC2635HUD-HMI12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. 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 ranging from 4.5V to 5.5V and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the automotive temperature range of –40°C to 125°C, and a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Quad 12-bit resolution with maximum integral nonlinearity error of ±2.5 LSB
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Automotive temperature grade (-40°C to 125°C)
• Power-on reset to mid-scale in internal reference mode

Applications

• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific suffixes against the manufacturer's ordering guide to confirm package type, temperature grade, and power-on reset behavior. Ensure the I²C address configuration pins are correctly tied to VCC or GND for the intended system topology. Confirm that the supply voltage remains within the 4.5V to 5.5V range required for the H-grade variant.

Selection Notes

Select this part when four independent 12-bit channels are required with high accuracy and low drift. The H-grade designation ensures operation at higher supply voltages (4.5V–5.5V) compared to the L-grade. Consider the external reference option if a different full-scale voltage is needed, though this specific model uses the internal reference. Verify settling time requirements, as the 12-bit version settles to ±1 LSB in approximately 5µs at 5V.

Part Context

This component belongs to the LTC2635 family, which offers 8-, 10-, and 12-bit resolutions in both QFN and MSOP packages. The HUD suffix indicates the 16-pin QFN package and automotive temperature grade. The HMI12 suffix specifies the 4.096V internal reference and mid-scale power-on reset behavior. Other variants include L-grade commercial parts and different reset configurations such as zero-scale or high-impedance states.

Replacement Considerations

Direct replacements within the same family include LTC2635HUH-HMI12#TRPBF (MSOP package) or LTC2635HUD-LMI12#TRPBF (L-grade, 2.5V reference). Cross-family replacements require verifying pin compatibility and I²C register maps.