LTC2636HDE-HMI8#TRPBF

Overview

The LTC2636HDE-HMI8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output and operates on 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 double-buffered data latches. Communication occurs via a 3-wire SPI/MICROWIRE interface with clock rates up to 50MHz. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with 8-bit resolution.
• Automotive Temperature Grade: Operates reliably from –40°C to 125°C.
• Integrated Precision Reference: Delivers a 4.096V full-scale output with 10ppm/°C drift.
• Rail-to-Rail Output Buffers: Ensures maximum dynamic range for voltage outputs.

Applications

• Automotive systems requiring high-temperature stability
• Process control and industrial automation equipment
• Portable battery-powered instrumentation
• Optical networking devices

Procurement Notes

Verify the H-grade designation confirms the –40°C to 125°C operating range and 4.5V minimum supply requirement. Confirm the DE suffix indicates the 14-lead DFN package. Ensure the TRPBF suffix matches the required tape and reel packaging format for automated assembly.

Selection Notes

Select this part when eight channels are needed with 4.096V full-scale output and automotive temperature ratings. Compare against LTC2636L variants if a lower 2.7V–5.5V supply range or 2.5V full-scale is sufficient. Consider the MSOP package option if exposed pad soldering is not feasible.

Part Context

This component belongs to the LTC2636 family of octal DACs. Variants differ by resolution (8, 10, or 12 bits), temperature grade (C, I, or H), and full-scale voltage (2.5V or 4.096V). The HDE suffix specifically denotes the Automotive grade (H), 14-lead DFN package (DE), and 8-bit resolution.

Replacement Considerations

Direct substitutes within the same family include other LTC2636 variants with different resolutions or temperature grades, such as LTC2636IDE-HMI8#TRPBF for Industrial grade or LTC2636HDE-HZ12#TRPBF for 12-bit resolution. Verify pin compatibility and thermal requirements before substitution.

FAQ

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

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

What is the minimum supply voltage required?

The H-grade variant requires a supply voltage between 4.5V and 5.5V for specified performance.

Does the device support external references?

Yes, the REF pin can accept an external voltage to set the full-scale output, overriding the internal 4.096V reference.