LTC2636HDE-LMI8#TRPBF

Overview

The LTC2636HDE-LMI8#TRPBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated 4.096V full-scale reference with a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 50MHz SPI/MICROWIRE-compatible 3-wire serial interface. Power-on reset defaults to mid-scale in internal reference mode. The component is housed in a 14-lead 4mm × 3mm DFN package.

Feature Summary

• Octal 8-Bit Architecture: Eight independent DAC channels with rail-to-rail output buffers.
• Integrated Reference: Internal 4.096V reference with ±10ppm/°C drift; supports external reference input.
• Automotive Grade: Guaranteed monotonic operation across –40°C to 125°C temperature range.
• High-Speed Interface: 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz.

Applications

• Automotive systems requiring high reliability and wide temperature tolerance.
• Process control and industrial automation equipment.
• Portable battery-powered instrumentation.
• Optical networking signal generation.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type, temperature grade, and power-on reset behavior. Ensure the supply voltage meets the minimum 4.5V requirement for the H-grade variant. Confirm lead-free status and tape-and-reel specifications if applicable.

Selection Notes

Select this part when eight isolated analog outputs are required in a compact footprint. The H-grade designation indicates a 4.096V internal reference and an extended automotive temperature range compared to C or I grades. Verify that the system power supply remains within the 4.5V to 5.5V window to ensure specified performance.

Part Context

This component belongs to the LTC2636 family of octal DACs. Variants differ by resolution (8, 10, or 12 bits), internal reference voltage (2.5V for L-grade, 4.096V for H-grade), and temperature rating. The DE suffix denotes the 14-lead DFN package, while MSOP is also available.

Replacement Considerations

Direct substitutes include other LTC2636 variants with matching resolution and package, such as LTC2636HDE-LMX8#TRPBF (external reference mode) or LTC2636HDE-HZ8#TRPBF (zero-scale reset). Cross-family replacements require verification of pin compatibility and electrical parameters.