LTC2636HDE-LMX10#PBF

Overview

The LTC2636HDE-LMX10#PBF is an octal 10-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 communicates via a 3-wire SPI/MICROWIRE interface supporting clock rates up to 50MHz. It includes hardware clear (CLR) and asynchronous DAC update (LDAC) pins, double-buffered data latches, and a power-on reset circuit that sets outputs to mid-scale in external reference mode upon startup.

Feature Summary

• Octal architecture with 8 independent 10-bit voltage output channels
• Integrated 4.096V internal reference with ±10ppm/°C drift
• SPI-compatible 3-wire serial interface with 50MHz clock rate
• Hardware control pins for CLR and LDAC updates

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel precision
• Portable battery-powered instrumentation
• Optical networking signal generation

Procurement Notes

Verify the specific ordering suffix LMX10#PBF against the manufacturer's current datasheet to confirm lead-free status and tape-and-reel packaging specifications. Ensure the external reference mode configuration aligns with system power-up requirements, as this variant resets to mid-scale when using an external reference source.

Selection Notes

Select this part when eight synchronized analog outputs are required with moderate resolution. The H-grade designation indicates suitability for automotive environments (-40°C to 125°C). Choose the LMX suffix if mid-scale initialization is preferred during power cycles in external reference configurations, distinguishing it from LZ (zero-scale) or MI (internal mid-scale) variants.

Part Context

This component belongs to the LTC2636 family of octal DACs. It shares the same core architecture and pinout with other resolutions (8-bit, 12-bit) and reset options within the series. The DE package denotes the 14-lead DFN form factor, while the MSOP package offers additional CLR/LDAC pins. All variants utilize the same SPI command set and reference structure.

Replacement Considerations

Direct substitutes include other LTC2636 variants with different resolutions or reset behaviors, such as LTC2636HDE-HZ10#PBF for zero-scale reset. For higher channel counts, consider the LTC2640 family. Interface compatibility remains consistent across the entire LTC2636 product line.