LTC2636CMS-HMI12#PBF

Overview

The LTC2636CMS-HMI12#PBF 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 4.096V. The device operates on a single supply voltage ranging from 4.5V to 5.5V and communicates via a 3-wire SPI/MICROWIRE-compatible interface with 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 internal reference mode.

Feature Summary

• Octal 12-bit resolution with guaranteed monotonicity over the operating temperature range
• Integrated 10ppm/°C reference yielding a 4.096V full-scale output
• Ultralow DAC-to-DAC crosstalk specified at less than 2.4nV•s
• Power-on reset configured for mid-scale output in internal reference mode

Applications

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

Procurement Notes

Verify the package type matches the MSOP-16 specification for this part number. Confirm the suffix indicates lead-free construction and tube packaging. Ensure the ordering suffix aligns with the required power-on reset behavior and full-scale voltage settings defined in the selection guide.

Selection Notes

Select this component when eight independent 12-bit channels are required with a 4.096V span. The H-grade designation ensures operation within the –40°C to 125°C automotive temperature range. Verify that the system supply voltage remains between 4.5V and 5.5V to meet performance specifications.

Part Context

This part belongs to the LTC2636 family of octal DACs available in 14-lead DFN and 16-lead MSOP packages. Variants differ by resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and power-on reset behavior. The CMS suffix denotes the commercial temperature grade, while the H suffix in the base model indicates the automotive grade.

Replacement Considerations

Direct substitutes include other LTC2636 variants with matching pinouts and electrical characteristics. Consider LTC2636HMS-LZ12#PBF if zero-scale reset is preferred, or LTC2636HMS-LMX12#PBF for external reference mid-scale reset. Verify thermal resistance and current limits for the MSOP package.