LTC2636HDE-LMX12#TRPBF

Overview

The LTC2636HDE-LMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. The device operates on a single supply voltage ranging from 4.5V to 5.5V and communicates via a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches and a power-on reset circuit configured to set outputs to mid-scale in external reference mode upon initialization.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated 10ppm/°C precision reference yielding 4.096V full-scale output
• SPI/MICROWIRE compatible 3-wire serial interface supporting 50MHz clock rates
• Power-on reset to mid-scale in external reference mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive applications
• Optical networking

Procurement Notes

Verify the specific ordering suffix LMX12#TRPBF against official Analog Devices documentation to confirm the mid-scale reset behavior in external reference mode and tape-and-reel packaging specifications. Ensure compatibility with the required 4.5V to 5.5V supply range for the H-grade automotive temperature variant.

Selection Notes

Select this component when eight synchronized 12-bit voltage outputs are required with high accuracy. The H-grade designation supports an operating temperature range of –40°C to 125°C. The LMX suffix indicates a power-on reset to mid-scale using an external reference, which differs from internal reference configurations. Verify that the system supply voltage remains within the 4.5V to 5.5V window for specified performance.

Part Context

This part belongs to the LTC2636 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The DE suffix identifies the 14-lead DFN package, while the H grade denotes the extended automotive temperature range. Variants within the family differ by resolution, package type, temperature grade, and power-on reset configuration.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Cross-model comparisons should be conducted carefully, as differences in resolution, package, and reset behavior may affect interchangeability.

FAQ

What is the full-scale output voltage for the LTC2636HDE-LMX12?

The full-scale output voltage is 4.096V when operating with the internal reference.

How does the power-on reset function behave for the LMX suffix?

The LMX suffix configures the device to reset to mid-scale in external reference mode after power-up.

What is the maximum serial clock frequency supported?

The serial interface supports clock rates up to 50MHz.