LTC2634CUD-LZ12#TRPBF

Overview

The LTC2634CUD-LZ12#TRPBF is a quad 12-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. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.2µs at 12-bit resolution, and low power consumption of 0.6mA at 3V. It incorporates rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit that defaults outputs to zero-scale.

Feature Summary

• Quad 12-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with selectable internal or external reference
• SPI/MICROWIRE compatible 3-wire serial interface operating up to 50MHz
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a tape and reel quantity of 2,500 pieces. Confirm the C temperature grade corresponds to the commercial range of 0°C to 70°C. Ensure the LZ12 designation matches the required zero-scale power-on reset behavior and 2.5V full-scale output specification for the design.

Selection Notes

Select this component when four independent 12-bit channels are required in a compact footprint. The LTC2634-L variant supports operation from a 2.7V supply, suitable for battery-powered systems. Choose the LZ suffix if system initialization requires outputs to default to zero volts upon power-up rather than mid-scale.

Part Context

This part belongs to the LTC2634 family, which offers various resolutions (8, 10, and 12 bits) and package options including 16-lead QFN and 10-lead MSOP. The CUD suffix identifies the commercial temperature grade and the 16-lead QFN package format. The LZ12 code specifies the 12-bit resolution and zero-scale reset configuration.

Replacement Considerations

Direct replacements within the same family include LTC2634CUD-LZ12#PBF for tube packaging or LTC2634IUD-LZ12#PBF for the industrial temperature range (-40°C to 85°C). Verify pin compatibility and thermal characteristics when substituting.