LTC2635HUD-HMI8#PBF

Overview

The LTC2635HUD-HMI8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. 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. It incorporates a power-on reset circuit configured to reset outputs to mid-scale in internal reference mode.

Feature Summary

• Quad 8-Bit Resolution with Integrated 4.096V Precision Reference
• Automotive Temperature Grade (–40°C to 125°C)
• Rail-to-Rail Output Buffers with Guaranteed Monotonicity
• Power-On Reset to Mid-Scale in Internal Reference Mode

Applications

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

Procurement Notes

Verify that the H suffix confirms the Automotive temperature grade (–40°C to 125°C) and the L/H designation ensures the 4.5V to 5.5V supply requirement is met for the 4.096V full-scale output. Confirm the MSE package type matches the PCB footprint requirements.

Selection Notes

Select this part when four independent 8-bit DAC channels are required with high accuracy and low drift. Ensure the system supply voltage remains within the 4.5V to 5.5V range. Consider the external reference option if a different full-scale voltage is needed, though this specific variant uses the internal 4.096V reference.

Part Context

This component belongs to the LTC2635 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The HUD suffix indicates the Automotive temperature grade and MSOP-10 package. Other variants include the C-grade commercial version and QFN packages.

Replacement Considerations

LTC2635CUH-MSE#PBF: Identical electrical specifications but in the Commercial temperature grade (0°C to 70°C).

FAQ

What is the power-on reset behavior for this specific part?

The HMI suffix indicates that upon power-up, the DAC outputs reset to mid-scale when operating in internal reference mode.

Can this DAC operate with an external reference?

Yes, while it has an integrated 4.096V reference, the REF pin can be used as an input to set the full-scale output to an external reference voltage.

What is the maximum INL error for the 8-bit version?

The maximum Integral Nonlinearity (INL) error for the LTC2635-8 is ±0.5 LSB.