LTC2636HMS-LMX12#PBF

Overview

The LTC2636HMS-LMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 16-lead MSOP package and operates within a 4.5V to 5.5V supply range, delivering a full-scale output of 4.096V when using the internal reference. The device includes an integrated precision reference with a temperature coefficient of 10ppm/°C and communicates via a 3-wire SPI/MICROWIRE interface supporting clock rates up to 50MHz. It incorporates a power-on reset circuit that sets outputs to mid-scale in external reference mode upon initialization.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail output buffers
• Integrated 10ppm/°C reference providing 4.096V full-scale output
• Power-on reset configured for mid-scale output in external reference mode
• SPI-compatible serial interface with hardware clear and asynchronous update capabilities

Applications

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

Procurement Notes

Verify the specific suffix LMX12 corresponds to the required power-on reset behavior and reference mode configuration. Confirm the MSOP package type matches the target PCB footprint. Ensure the H-grade temperature rating (-40°C to 125°C) meets the operational environment requirements. Check for lead-free compliance markings on the component body.

Selection Notes

Select this part when eight independent 12-bit DAC channels are required in a compact surface-mount package. The H-grade variant is necessary for automotive or high-temperature industrial environments. Choose the LMX suffix if the system design requires outputs to settle at mid-scale during power-up while utilizing an external reference voltage source.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 8-bit and 10-bit resolutions. Variants include the LTC2636L series for lower voltage operation (2.7V–5.5V) and different package options like the 14-lead DFN. The MSOP package provides additional control pins for LDAC and CLR functions not present in the DFN version.

Replacement Considerations

Public confirmed substitute part numbers: None.