LTC2634IUD-HZ8#PBF

Overview

The LTC2634IUD-HZ8#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 2.5V and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 85°C industrial temperature range, and a power-on reset to zero-scale. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz.

Feature Summary

• Quad 8-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with 2.5V full-scale output
• Power-on reset to zero-scale for consistent initialization
• Industrial temperature grade (-40°C to 85°C)

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type, temperature grade, and reset behavior. Ensure compatibility with system power supply sequencing requirements, particularly regarding the REF pin voltage limits during power-up transitions.

Selection Notes

Select this component for applications requiring four independent 8-bit outputs with low crosstalk and precise zero-scale initialization. Verify that the 2.5V internal reference range meets the application's output span needs and that the 3-wire serial interface timing aligns with the host controller capabilities.

Part Context

This part belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The 'I' designation indicates the industrial temperature range, while 'HZ8' specifies the zero-scale reset and 8-bit resolution configuration within the 2.5V full-scale variant.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.