LTC2634HUD-HMI8#PBF

Digital To Analog Converters Overview

The LTC2634HUD-HMI8#PBF 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/MICROWIRE compatible 3-wire serial interface. Power-on reset defaults to mid-scale in external reference mode.

Digital To Analog Converters Feature Summary

• Quad 8-bit DACs with integrated 4.096V precision reference
• Automotive grade (-40°C to 125°C) with AEC-Q100 qualification
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Power-on reset to mid-scale in external reference mode

Digital To Analog Converters Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Digital To Analog Converters Procurement Notes

Verify the H-grade temperature rating and HMI power-on reset configuration against system requirements. Confirm the QFN package soldering specifications for the exposed pad ground connection. Ensure supply voltage sequencing respects the REF pin limits during power-up to maintain reliability.

Digital To Analog Converters Selection Notes

Select this part for applications requiring high channel count with moderate resolution and automotive reliability. The HMI suffix ensures outputs start at mid-scale upon power-up, which may be necessary if downstream circuits cannot tolerate zero-scale initialization. Verify that the 4.5V minimum supply voltage aligns with the system power architecture.

Digital To Analog Converters Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The HUD suffix denotes the Automotive temperature grade (H), QFN package (UD), and 8-bit resolution (8). The HMI variant specifically configures the internal power-on reset logic for mid-scale initialization in external reference mode.

Digital To Analog Converters Replacement Considerations

LTC2634IUD-HMI8#PBF: Industrial temperature grade (-40°C to 85°C). LTC2634CUD-HMI8#PBF: Commercial temperature grade (0°C to 70°C). LTC2634HUD-LMI8#PBF: Reset to mid-scale in internal reference mode.