LTC2636HDE-HMI10#PBF

Overview

The LTC2636HDE-HMI10#PBF is an octal 10-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 includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and communicates via a 3-wire SPI/MICROWIRE interface with clock rates up to 50MHz. It incorporates a power-on reset circuit that sets outputs to mid-scale in internal reference mode upon startup.

Feature Summary

• Octal 10-Bit Resolution: Provides eight independent DAC channels with 10-bit resolution and ±1 LSB integral nonlinearity error.
• Integrated Precision Reference: Features a built-in 10ppm/°C reference generating a 4.096V full-scale output for H-grade devices.
• Automotive Temperature Range: Guaranteed monotonic operation across –40°C to 125°C operating temperature.
• Power-On Reset to Mid-Scale: Automatically initializes DAC outputs to mid-scale (2.048V) in internal reference mode after power-up.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems
• Optical Networking

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction and RoHS compliance as per Analog Devices standards. Confirm the package type corresponds to the 14-lead DFN (DE) variant. Ensure the H-grade designation matches the required 4.5V to 5.5V supply voltage range and automotive temperature specifications for the target application environment.

Selection Notes

Select this part when eight independent voltage outputs are required in a compact footprint. The H-grade suffix denotes the 4.096V full-scale range requiring a minimum 4.5V supply, distinct from the L-grade 2.5V version. The MI suffix specifies mid-scale power-on reset behavior in internal reference mode. Verify compatibility with the system's SPI clock speed and logic voltage levels before integration.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 12-bit and 8-bit resolutions. Variants exist in both 14-lead DFN and 16-lead MSOP packages. The HDE configuration specifically combines the H-grade automotive temperature rating, DE 14-lead DFN package, and MI mid-scale reset option within the 10-bit resolution tier.

Replacement Considerations

Direct substitutes within the same family include LTC2636HDE-LMI10#PBF (L-grade, lower voltage) or LTC2636HDE-HZ10#PBF (zero-scale reset). For different pin counts, consider the quad-channel LTC2634 series or single-channel LTC2640 series, noting differences in channel count and package dimensions.