LTC2634IUD-HMX8#PBF

Overview

The LTC2634IUD-HMX8#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 industrial temperature range of –40°C to 85°C, and communicates via a 3-wire SPI/MICROWIRE compatible interface. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 8-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail buffered outputs with ultralow crosstalk (2.4nV•s)
• SPI/MICROWIRE compatible 3-wire serial interface up to 50MHz
• Power-on reset to mid-scale in external reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix HMX indicates power-on reset to mid-scale in external reference mode. Confirm the I-grade designation corresponds to the –40°C to 85°C operating temperature range. Ensure the QFN package matches the required PCB footprint.

Selection Notes

Select this part for applications requiring four independent 8-bit channels with a 4.096V full-scale range. It is suitable where mid-scale initialization is preferred during power-up in external reference configurations. Verify supply voltage compatibility within the 4.5V to 5.5V range.

Part Context

This component belongs to the LTC2634 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The IUD suffix denotes the Industrial temperature grade and 16-lead QFN package. Other variants include C-grade commercial parts and H-grade automotive parts with wider temperature ranges.

Replacement Considerations

LTC2634CUD-HMX8#PBF offers identical electrical specifications but supports the commercial temperature range of 0°C to 70°C instead of the industrial range.