LTC2634IUD-LZ10#TRPBF

Overview

The LTC2634IUD-LZ10#TRPBF is a quad 10-bit voltage output digital-to-analog converter (DAC) from Analog Devices Inc. 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 with clock rates up to 50MHz. It is housed in a 16-lead 3mm × 3mm QFN package.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the 'I' grade corresponds to the industrial temperature range of –40°C to 85°C. Ensure the 'LZ' designation matches the required zero-scale power-on reset behavior for internal reference mode applications.

Selection Notes

Select this part when four independent 10-bit outputs are required with a 2.5V full-scale range. The 'Z' suffix ensures outputs start at zero upon power-up, which is critical for systems where downstream circuits must remain inactive during startup. Verify that the 2.7V minimum supply voltage aligns with the system's power architecture.

Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The IUD variant specifically denotes the Industrial temperature grade and 16-lead QFN package. Other variants include the C-grade for commercial use and H-grade for automotive applications up to 125°C.

Replacement Considerations

Direct replacements within the same family include LTC2634IUD-LZ12#TRPBF for higher resolution or LTC2634IUD-LZ8#TRPBF for lower resolution. For external reference configurations, consider the LMX series. Note that MSOP package versions (MSE suffix) have different pinouts and thermal characteristics.