LTC2634CUD-LZ12#PBF

Overview

The LTC2634CUD-LZ12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes rail-to-rail output buffers. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity error of ±2.5 LSB, a settling time of 4.2µs at 3V, and low power consumption of 0.6mA. The component is housed in a 16-lead 3mm × 3mm QFN package and is designed for commercial temperature ranges.

Feature Summary

• Quad 12-bit resolution with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with selectable internal or external reference modes
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock rate
• 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 against official documentation to confirm package type, temperature grade, and power-on reset behavior. Ensure compatibility with system voltage requirements, as the 'L' variant requires a minimum of 2.7V while 'H' variants require 4.5V. Confirm RoHS compliance status through manufacturer channels prior to integration.

Selection Notes

Select this part when four independent 12-bit DAC channels are required in a compact footprint. The 'LZ12' designation indicates a 2.5V full-scale range with zero-scale power-on reset. Consider the 'H' series if a 4.096V output span is necessary, noting the higher minimum supply voltage requirement. Evaluate thermal performance within the 16-lead QFN package constraints for the target application environment.

Part Context

This component belongs to the LTC2634 family, which offers various combinations of resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and power-on reset behaviors. The CUD package denotes the commercial temperature grade (0°C to 70°C) in a 16-lead QFN format. Other variants include MSOP packages and automotive-grade options with different reset configurations.

Replacement Considerations

Direct substitutes within the same family include LTC2634CUD-HZ12#PBF for a 4.096V full-scale range or LTC2634CUD-MI12#PBF for mid-scale reset. Cross-package replacements like the MSE variant offer identical electrical characteristics in a 10-lead MSOP form factor.