LTC2634CUD-LMI8#TRPBF

Overview

The LTC2634CUD-LMI8#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 2.5V and operates on a single 2.7V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. It includes double-buffered data latches, rail-to-rail output buffers, and a power-on reset circuit that initializes outputs to mid-scale in internal reference mode. Packaged in a 16-lead 3mm × 3mm QFN, it guarantees monotonicity over the commercial temperature range of 0°C to 70°C.

Feature Summary

• Quad 8-bit DACs with integrated 2.5V full-scale precision reference
• Rail-to-rail output buffers guaranteed monotonic from -40°C to 125°C
• 3-wire SPI/MICROWIRE serial interface operating at 50MHz
• Power-on reset to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a tape and reel quantity of 2,500 pieces. Confirm the C-grade designation aligns with the required commercial temperature range of 0°C to 70°C for the application environment. Ensure the LMI8 configuration matches the need for mid-scale reset and 2.5V full-scale output.

Selection Notes

Select this part when a quad 8-bit resolution is sufficient for the application's accuracy requirements. The LMI8 variant is appropriate if mid-scale initialization upon power-up is desired in internal reference mode. For applications requiring zero-scale reset, consider the LZ8 suffix instead. Verify that the 2.5V full-scale range meets the system's voltage swing needs.

Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The CUD suffix denotes the 16-lead QFN package type. The LMI8 designation specifies the 8-bit resolution, 2.5V full-scale internal reference, and mid-scale power-on reset behavior within the commercial temperature grade.

Replacement Considerations

Direct replacements within the same family include LTC2634CUD-LZ8#TRPBF for zero-scale reset or LTC2634CUD-LMX8#TRPBF for external reference mode. Higher resolution options such as LTC2634CUD-LMI10#TRPBF or LTC2634CUD-LMI12#TRPBF are available if greater accuracy is required.