LTC2636CMS-LMI8#PBF

Overview

The LTC2636CMS-LMI8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a rail-to-rail output buffer and is guaranteed monotonic over the operating temperature range. The device incorporates an integrated high-accuracy reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. It operates from a single 2.7V to 5.5V supply and communicates via an SPI/MICROWIRE-compatible 3-wire serial interface with clock rates up to 50MHz. The part is housed in a 16-lead MSOP package.

Feature Summary

• Octal architecture providing eight independent 8-bit DAC channels
• Integrated 2.5V full-scale reference with ±10ppm/°C temperature coefficient
• Rail-to-rail output buffers with guaranteed monotonicity
• SPI/MICROWIRE compatible 3-wire serial interface supporting 50MHz clock

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 #PBF indicates lead-free design compliance. Confirm the MSOP package type matches the target PCB footprint. Ensure the C-grade temperature rating (0°C to 70°C) aligns with the system environmental requirements. Cross-reference the internal reference mode settings with the power-on reset configuration.

Selection Notes

Select this component when eight low-cost, 8-bit channels are required with integrated reference capabilities. The 2.5V full-scale output suits single-supply logic interfaces. Consider the H-grade variant if automotive temperature ranges (-40°C to 125°C) or higher 4.096V full-scale outputs are necessary. Verify settling time requirements against the 3.4µs specification at 3V supply.

Part Context

This part belongs to the LTC2636 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The CMS designation identifies the 16-lead MSOP package option, distinct from the 14-lead DFN DE package. The L suffix denotes the 2.5V internal reference version, while MI indicates a mid-scale power-on reset behavior.

Replacement Considerations

Direct replacements within the same family include LTC2636CMS-LMX8#PBF for external reference operation or LTC2636CMS-LZ8#PBF for zero-scale power-on reset. For wider temperature ranges, consider the I-grade or H-grade variants such as LTC2636HMS-LMI8#PBF.