LTC2636HDE-HMX8#TRPBF

Overview

The LTC2636HDE-HMX8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 4.096V full-scale output with an integrated 10ppm/°C reference and operates on a 4.5V to 5.5V supply. The device provides rail-to-rail outputs, guaranteed monotonicity over –40°C to 125°C, and communicates via a 50MHz SPI-compatible interface. It includes double-buffered data latches and resets to mid-scale upon power-up.

Feature Summary

• Octal 8-Bit Resolution: Eight independent DAC channels with ±0.5 LSB INL and ±0.5 LSB DNL.
• High-Speed Interface: 3-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz.
• Integrated Reference: Internal 10ppm/°C reference providing a 4.096V full-scale output; supports external reference input.
• Power-On Reset: Configurable reset to mid-scale in external reference mode (HMX suffix) upon power-up.

Applications

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

Procurement Notes

Verify the H-grade automotive temperature rating (-40°C to 125°C) and the specific HMX power-on reset configuration against system requirements. Confirm the 14-lead DFN package dimensions and exposed pad grounding requirements for PCB layout. Ensure the 4.5V minimum supply voltage aligns with the target power architecture.

Selection Notes

Select this part when eight low-cost, high-speed DAC channels are required with a fixed 4.096V range. The HMX suffix ensures outputs initialize to mid-scale, which may be necessary if downstream circuits cannot tolerate zero-scale voltages during startup. Compare settling times of 3.8µs (8-bit) against application latency needs.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants include the LTC2636-L series for 2.7V–5.5V operation with a 2.5V full-scale output. The HDE suffix specifically denotes the Automotive grade (H), 14-lead DFN package (DE), and 8-bit resolution (8).

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other members of the LTC2636 family or the LTC2637 I2C variant if interface compatibility allows.