LTC2635CUD-HZ8#PBF

Overview

The LTC2635CUD-HZ8#PBF 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 4.096V and operates from a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key specifications include a maximum integral nonlinearity error of ±0.5 LSB, low noise of 0.75mVP-P (0.1Hz to 200kHz), and power-on reset options.

Feature Summary

• Quad 8-Bit Resolution: Four independent DAC channels with ±0.5 LSB maximum INL error.
• Integrated Precision Reference: Internal 4.096V full-scale output with ±10ppm/°C drift.
• Automotive Grade: Guaranteed monotonic operation over –40°C to 125°C temperature range.
• I²C Interface: Compatible with standard (100kHz) and fast (400kHz) clock rates.

Applications

• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS requirements. Confirm the package type UD corresponds to the 16-pin QFN form factor. Ensure the H-grade designation matches the required 4.5V to 5.5V supply voltage range for the 4.096V full-scale output.

Selection Notes

Select this part for applications requiring four independent 8-bit outputs with high accuracy and automotive reliability. The H-grade variant is necessary for 4.096V full-scale outputs, whereas the L-grade provides 2.5V. Consider the Z-power-on reset option which defaults outputs to zero-scale upon initialization.

Part Context

This component belongs to the LTC2635 family of quad DACs available in 8-, 10-, and 12-bit resolutions. The CUD suffix denotes the commercial temperature grade (0°C to 70°C) is incorrect; the 'H' in the model number specifies the Automotive Temperature Range (–40°C to 125°C). The 'Z' indicates a power-on reset to zero-scale in internal reference mode.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.