LTC2634HUD-HMI12#TRPBF

Overview

The LTC2634HUD-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 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 low noise characteristics. Communication is handled via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. This specific part number indicates QFN packaging, tape and reel delivery, and a power-on reset configuration that sets outputs to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with ±2.5 LSB maximum integral nonlinearity error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Automotive grade qualification (AEC-Q100) for -40°C to 125°C operation
• Ultralow DAC-to-DAC crosstalk of 2.4nV•s typical

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronic modules

Procurement Notes

Verify the H-grade temperature rating (-40°C to 125°C) and the #TRPBF suffix indicating a 2,500-unit tape and reel quantity. Confirm the HMI12 designation ensures mid-scale reset behavior in internal reference mode. Ensure the design supports the required 4.5V minimum supply voltage for the 4.096V full-scale variant.

Selection Notes

Select this component when high channel count and automotive reliability are required. The 12-bit resolution provides 4,096 distinct levels. Choose the H suffix for the 4.096V range if higher dynamic range is needed, noting the 4.5V minimum supply constraint compared to the L-series 2.7V start. Verify that the QFN package thermal dissipation meets the PCB layout requirements.

Part Context

This part belongs to the LTC2634 family, which offers 8-, 10-, and 12-bit resolutions in both QFN and MSOP packages. The HUD suffix identifies the 16-lead QFN package type. The HMI12 code specifies the 12-bit resolution and the mid-scale internal reference power-on reset option. Other variants include LZ (zero-scale reset) and MX (mid-scale external reference reset).

Replacement Considerations

Direct replacements within the same family include LTC2634HUD-LMI12#TRPBF or LTC2634HUD-HZ12#TRPBF, differing only in power-on reset behavior. For lower resolution needs, the 10-bit or 8-bit versions share the same pinout and interface.