LTC2634CUD-HMI12#PBF

Overview

The LTC2634CUD-HMI12#PBF 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 4.096V and operates on a single 4.5V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity error of ±2.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the operating temperature range. This specific variant includes a power-on reset circuit that initializes outputs to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock rates
• Power-on reset to mid-scale in internal reference mode
• Rail-to-rail output buffers with ultralow DAC-to-DAC crosstalk

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment

Procurement Notes

Verify the package type matches the design requirements, as this component is supplied in a 16-lead QFN format. Confirm the temperature grade corresponds to the operational environment, specifically noting the commercial range for the 'C' suffix. Ensure the ordering suffix aligns with the required power-on reset behavior and reference configuration before finalizing procurement.

Selection Notes

Select this part when a quad-channel 12-bit DAC with a fixed 4.096V internal reference is required. The H-grade designation indicates suitability for automotive applications with extended temperature ranges. Consider the external reference mode variants if a different full-scale voltage or mid-scale reset in external reference mode is needed instead of the internal configuration provided here.

Part Context

This component belongs to the LTC2634 family of quad DACs available in 8-, 10-, and 12-bit resolutions. The 'H' suffix denotes the high-performance version with a 4.096V full-scale output, while 'L' variants offer 2.5V. The 'UD' indicates the 16-lead QFN package, and 'HMI12' specifies the 12-bit resolution with mid-scale reset in internal reference mode.

Replacement Considerations

Direct substitutes within the same family include LTC2634CUD-LMI12#PBF for 2.5V operation or LTC2634CUD-HZ12#PBF for zero-scale reset. Cross-package alternatives like the MSOP version require pinout adaptation.