LTC2634HUD-HMX8#TRPBF

Overview

The LTC2634HUD-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, guaranteed monotonicity over the -40°C to 125°C automotive temperature range, and communicates via a 50MHz SPI-compatible interface. The H suffix denotes the automotive grade, while MX indicates power-on reset to mid-scale in external reference mode.

Feature Summary

• Quad 8-bit DACs with integrated 4.096V precision reference
• AEC-Q100 qualified for automotive applications (-40°C to 125°C)
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV·s)
• SPI/MICROWIRE compatible 3-wire serial interface up to 50MHz

Applications

• Automotive systems requiring high reliability
• Process control and industrial automation
• Portable equipment
• Automatic test equipment

Procurement Notes

Verify the #TRPBF suffix confirms tape and reel packaging containing 2,500 pieces. Confirm the HUD package designation matches the required 16-lead QFN form factor. Ensure the H-grade specification aligns with the intended operating temperature range requirements.

Selection Notes

Select this part when an automotive-rated quad DAC with a fixed 4.096V internal reference is needed. The MX suffix ensures outputs reset to mid-scale upon power-up if using an external reference. For lower voltage applications or different reset behaviors, consider other variants within the LTC2634 family.

Part Context

This component belongs to the LTC2634 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The specific model combines the H-grade automotive temperature rating with the 8-bit resolution and external reference mid-scale reset configuration.

Replacement Considerations

Direct replacements include other LTC2634 variants with matching resolution and temperature grades, such as LTC2634HUD-LMX8#TRPBF, provided the internal reference voltage difference (2.5V vs 4.096V) is acceptable.