LTC2636CMS-LMI12#TRPBF

Overview

The LTC2636CMS-LMI12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated high-accuracy reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and utilizes 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 that initializes outputs to mid-scale in internal reference mode. The component is housed in a 16-lead MSOP package.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with guaranteed monotonicity over the operating temperature range.
• Integrated Precision Reference: Features an internal 10ppm/°C reference setting a 2.5V full-scale output; supports external reference input for programmable full-scale voltage.
• High-Speed Serial Interface: Communicates via a 3-wire SPI/MICROWIRE compatible interface supporting clock frequencies up to 50MHz.
• Power-On Reset Configuration: Includes hardware clear and asynchronous update pins; resets to mid-scale upon power-up in internal reference mode.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the MS package designation corresponds to the 16-lead MSOP form factor. Ensure the C grade specification aligns with commercial temperature requirements of 0°C to 70°C. Cross-reference the LMI12 code to confirm mid-scale reset behavior and 2.5V internal reference configuration.

Selection Notes

Select this part when eight independent 12-bit voltage outputs are required within a compact footprint. The internal 2.5V reference simplifies design by eliminating external precision components. Choose the MSOP package if exposed pad soldering constraints favor surface-mount leads over DFN. Verify that the 2.7V to 5.5V supply range matches system power rails and that mid-scale initialization meets safety or operational startup requirements.

Part Context

This component belongs to the LTC2636 family, which offers variations in resolution (8, 10, or 12 bits), package type (DFN or MSOP), and temperature grades (Commercial, Industrial, Automotive). The CMS-LMI12 variant specifically denotes the Commercial grade, MSOP package, Mid-scale reset, and 12-bit resolution configuration.

Replacement Considerations

Direct replacements within the same family include LTC2636CMS-LMX12#TRPBF for external reference operation or LTC2636CMS-LZ12#TRPBF for zero-scale reset. For different resolutions, consider LTC2636CMS-LMI10#TRPBF or LTC2636CMS-LMI8#TRPBF. Package alternatives like the 14-lead DFN require schematic and layout modifications due to pin count differences.