LTC2634IUD-HMX8#TRPBF

Overview

The LTC2634IUD-HMX8#TRPBF is a quad 8-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 operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, double-buffered data latches, and ultralow crosstalk between DACs. Communication is handled via an SPI/MICROWIRE compatible 3-wire serial interface supporting clock rates up to 50MHz. This specific variant is housed in a 16-lead QFN package, rated for the industrial temperature range (-40°C to 85°C), and configured for mid-scale reset upon power-up when using an external reference.

Feature Summary

• Quad 8-bit resolution with ±0.5 LSB maximum INL error
• Integrated 4.096V full-scale internal reference or external reference input
• Industrial temperature grade (-40°C to 85°C)
• Power-on reset to mid-scale in external reference mode

Applications

• Process control and industrial automation
• Portable equipment
• Automotive systems

Procurement Notes

Verify that the H suffix matches the required 4.5V to 5.5V supply range and 4.096V full-scale output. Confirm the I suffix aligns with the -40°C to 85°C operating temperature requirement. Ensure the MX suffix provides the correct mid-scale reset behavior for external reference applications. Check the TRPBF suffix for tape and reel packaging specifications.

Selection Notes

Select this part for applications requiring four independent 8-bit outputs with high accuracy and low crosstalk. The H-grade version necessitates a minimum 4.5V supply, distinguishing it from the L-grade which supports 2.7V. The MX suffix is critical if the system requires outputs to settle at mid-scale during power-up rather than zero-scale. Verify compatibility with the 3-wire SPI interface timing requirements.

Part Context

This component belongs to the LTC2634 family of quad DACs, which offers various combinations of resolution (8-, 10-, 12-bit), package types (QFN, MSOP), and temperature grades. The IUD designation specifically identifies the Industrial grade, 16-lead QFN package variant. Other family members include the C-grade commercial version and the H-grade automotive version, alongside different reset configurations like Z (zero-scale) and MI (mid-scale internal).

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.