LTC2637IMS-HMX12#PBF

Overview

The LTC2637IMS-HMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision 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 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches and a power-on reset circuit configured to reset to mid-scale in external reference mode. The component is housed in a 16-lead MSOP package.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated 10ppm/°C precision reference yielding 4.096V full-scale output
• I2C-compatible serial interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset function configurable for mid-scale initialization in external reference mode

Applications

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

Procurement Notes

Verify the specific suffix HMX12 against official documentation to confirm the power-on reset behavior and resolution. Ensure the supply voltage range meets the 4.5V to 5.5V requirement for the H-grade internal reference configuration. Confirm package integrity for the 16-lead MSOP form factor during inspection.

Selection Notes

Select this part when multiple low-drift voltage outputs are required within a single package. The H-grade designation indicates compatibility with higher supply voltages necessary for the 4.096V internal reference. Consider the I2C address pin configurations if multiple devices share the same bus lines.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes variants with 10-bit and 8-bit resolutions. The family shares common architectural features such as rail-to-rail output buffers and guaranteed monotonicity over the operating temperature range. Variants differ primarily in resolution, internal reference voltage, and power-on reset settings.

Replacement Considerations

Direct substitutes include other LTC2637 variants with different resolutions or reset behaviors, provided the electrical specifications match the application requirements.