LTC2636CMS-LMX12#PBF

Overview

The LTC2636CMS-LMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 10ppm/°C internal reference and operates on a single 2.7V to 5.5V supply. The device provides rail-to-rail output buffers and guarantees monotonicity over the commercial temperature range of 0°C to 70°C. Communication occurs via a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. This specific variant resets to mid-scale in external reference mode upon power-up and is housed in a 14-lead DFN package.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with guaranteed monotonicity.
• Integrated Reference: Includes a high-accuracy, low-drift 10ppm/°C internal reference for 2.5V full-scale output.
• SPI Interface: Utilizes a 3-wire serial interface supporting clock rates up to 50MHz.
• Power-On Reset: Configured to reset outputs to mid-scale in external reference mode upon power-up.

Applications

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

Procurement Notes

Verify the component matches the exact ordering suffix CMS-LMX12#PBF to ensure correct package type, temperature grade, resolution, and power-on reset behavior. Confirm that the application environment remains within the specified 0°C to 70°C commercial operating range. Ensure supply voltages stay between 2.7V and 5.5V for proper operation.

Selection Notes

Select this part when eight independent 12-bit voltage outputs are required in a compact footprint. Choose the L-grade version for 2.7V to 5.5V supply compatibility. Opt for the MX suffix if mid-scale initialization in external reference mode is necessary. Verify that the 14-lead DFN package fits the PCB layout constraints.

Part Context

This component belongs to the LTC2636 family of octal DACs. Variants differ by resolution (8, 10, or 12 bits), package (DFN or MSOP), temperature grade (C, I, or H), and power-on reset configuration (Zero-Scale, Mid-Scale Internal, or Mid-Scale External). The CMS-LMX12#PBF specifically denotes the Commercial grade, MSOP/DFN package, Mid-Scale External reset, and 12-bit resolution.

Replacement Considerations

Direct substitutes include other LTC2636 variants with matching 12-bit resolution and DFN packaging, such as LTC2636CDE-LMI12#PBF or LTC2636CDE-LZ12#PBF, provided the power-on reset behavior aligns with system requirements. Cross-family replacements require verification of pinout compatibility and electrical specifications.