LTC2634CUD-LZ10#TRPBF

Overview

The LTC2634CUD-LZ10#TRPBF is a quad 10-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 a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. It includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 125°C range, and double-buffered data latches. This specific variant resets to zero-scale upon power-up and is housed in a 16-lead QFN package.

Feature Summary

• Quad 10-bit DACs with integrated 2.5V full-scale reference (10ppm/°C drift)
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s typical)
• SPI/MICROWIRE compatible 3-wire serial interface operating at 50MHz
• Power-on reset to zero-scale for consistent system initialization

Applications

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

Procurement Notes

Verify the #TRPBF suffix indicates a tape and reel packaging format containing 2,500 units per reel. Confirm the LZ designation corresponds to the zero-scale power-on reset configuration. Ensure the C temperature grade meets the required commercial operating range of 0°C to 70°C for the specific application environment.

Selection Notes

Select this part when a quad channel DAC with a fixed 2.5V internal reference is required. The LZ suffix ensures outputs initialize to zero volts upon power-up, which is critical for protecting downstream circuits sensitive to nonzero voltages during startup. Compare settling time specifications against system update rate requirements.

Part Context

This component belongs to the LTC2634 family, which offers 8-, 10-, and 12-bit resolutions in both QFN and MSOP packages. The CUD suffix identifies the commercial temperature grade and 16-lead QFN physical package. The LZ10 code specifies the 10-bit resolution and zero-scale reset behavior within the internal reference mode.

Replacement Considerations

Direct replacements include other LTC2634 variants with matching resolution and reset characteristics, such as LTC2634CUD-LZ10#PBF for tube packaging or LTC2634CUD-HZ10#TRPBF if a 4.096V full-scale output is acceptable.