LTC2634CUD-HZ10#PBF

Overview

The LTC2634CUD-HZ10#PBF is a quad 10-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing 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 ±1 LSB, a settling time of 4.2µs at 5V, and rail-to-rail output buffers guaranteed monotonic over the operating temperature range. This specific variant belongs to the 'H' grade for automotive applications (-40°C to 125°C), uses a 16-lead QFN package, and incorporates a power-on reset circuit that clears outputs to zero-scale.

Feature Summary

• Quad 10-bit resolution with integrated 4.096V precision reference
• Rail-to-rail output buffers with guaranteed monotonicity
• Power-on reset to zero-scale in internal reference mode
• 3-wire serial interface supporting up to 50MHz clock rates

Applications

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

Procurement Notes

Verify the component matches the specified Automotive temperature grade (H) and the 16-lead QFN package configuration. Confirm the ordering suffix indicates lead-free construction and standard tube packaging. Ensure the design supports the required 4.5V to 5.5V supply voltage range for proper operation of the H-grade variant.

Selection Notes

Select this part when a quad DAC with high accuracy and low drift is required for automotive or industrial environments. The HZ10 suffix specifically provides a 4.096V full-scale output with a zero-scale power-on reset, suitable for applications where downstream circuits must remain inactive during initialization. Consider the 16-lead QFN package if board space is limited compared to the MSOP option.

Part Context

This component is part of the LTC2634 family, which includes 8-, 10-, and 12-bit variants. The CUD designation identifies the commercial temperature grade (0°C to 70°C) within the broader product line, while the H suffix denotes the extended automotive temperature range (-40°C to 125°C). The UD package refers to the 16-lead 3mm x 3mm QFN form factor common across the series.

Replacement Considerations

Direct replacements within the same family include other LTC2634 variants with different resolutions or reset behaviors, such as the LTC2634CUD-HMI10#PBF for mid-scale reset. Cross-family replacements require matching channel count, resolution, and package type.