LTC2634IUD-LZ10#PBF

Overview

The LTC2634IUD-LZ10#PBF 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 2.7V to 5.5V supply and includes rail-to-rail output buffers. It communicates via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key specifications include ±1 LSB maximum integral nonlinearity, 3.8µs settling time at 3V, and power-on reset to zero-scale. It is housed in a 16-lead 3mm × 3mm QFN package and rated for industrial temperatures from –40°C to 85°C.

Feature Summary

• Quad 10-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers operating on 2.7V to 5.5V single supply
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock
• Power-on reset to zero-scale and double buffered data latches

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF confirms lead-free compliance and RoHS standards. Confirm the 'I' grade designation matches the required –40°C to 85°C industrial temperature range for the application environment. Ensure the QFN package footprint aligns with the PCB layout guidelines provided in the datasheet.

Selection Notes

Select this part when four independent 10-bit channels are required with high accuracy and low drift. The internal 2.5V reference simplifies design by eliminating external components. Choose the LZ variant if system initialization requires outputs to default to zero-scale upon power-up rather than mid-scale.

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 suffix indicates the Industrial temperature grade and 16-lead QFN packaging. Other variants include the MSE package and different power-on reset configurations like MI or MX.

Replacement Considerations

Direct substitutes within the same family include LTC2634IUD-LZ12#PBF for higher resolution or LTC2634IUD-LZ8#PBF for lower resolution. For MSOP packaging, consider LTC2634IMSE-LZ10#PBF. Verify pin compatibility and thermal characteristics when switching between package types.