LTC2634HUD-LZ8#TRPBF

Overview

The LTC2634HUD-LZ8#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 a power-on reset to zero-scale. Communication is handled via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface.

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 and guaranteed monotonicity
• Power-on reset to zero-scale in internal reference mode
• 50MHz SPI/MICROWIRE compatible serial interface

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the H-grade designation corresponds to the automotive temperature range of -40°C to 125°C. Ensure the LZ8 configuration matches the required zero-scale power-on reset behavior for the application.

Selection Notes

Select this part when a quad 8-bit resolution is sufficient for the system requirements. The H-grade variant requires a minimum supply voltage of 4.5V, unlike the L-grade which supports 2.7V. The Z-suffix ensures outputs initialize to zero upon power-up, which is critical for safety or protection circuits sensitive to initial DAC states.

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 package denotes a 16-lead QFN form factor. The family shares common architecture including low crosstalk (2.4nV•s typical) and double-buffered data latches for synchronized updates across all four channels.

Replacement Considerations

Direct replacements within the same family include LTC2634CUD-HZ8#PBF for commercial temperature ranges or LTC2634IUD-HZ8#PBF for industrial ranges. For different resolutions, consider LTC2634HUD-HZ10#TRPBF (10-bit) or LTC2634HUD-HZ12#TRPBF (12-bit), noting that linearity specifications vary by bit depth.