LTC2637HDE-HMX12#TRPBF

Overview

The LTC2637HDE-HMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output with a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches, rail-to-rail output buffers, and a power-on reset circuit configured to reset to mid-scale in external reference mode.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail buffered outputs
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Ultralow DAC-to-DAC crosstalk (<3nV•s)
• Power-on reset to mid-scale for external reference configurations

Applications

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

Procurement Notes

Verify the specific ordering suffix HMX12#TRPBF against official documentation to confirm the mid-scale reset behavior in external reference mode and tape-and-reel packaging quantity. Ensure the design supports the required 4.5V to 5.5V supply range and I2C bus pull-up requirements for reliable operation.

Selection Notes

Select this part when eight independent 12-bit voltage outputs are required within a compact footprint. The H-grade variant supports automotive temperature ranges (-40°C to 125°C). Choose between internal or external reference modes based on system accuracy needs; note that the HMX suffix specifically configures the power-on reset state for external reference applications.

Part Context

This component belongs to the LTC2637 family of octal DACs available in DFN and 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 HDE package denotes a 14-lead DFN form factor suitable for space-constrained designs.

Replacement Considerations

Direct replacements within the same family include LTC2637HDE-HMI12#TRPBF (internal reference reset) or LTC2637HDE-HZ12#TRPBF (zero-scale reset). For different resolutions, consider LTC2637HDE-HMX10#TRPBF or LTC2637HDE-HMX8#TRPBF.