LTC2637CDE-HMX10#TRPBF

Overview

The LTC2637CDE-HMX10#TRPBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. 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 incorporates rail-to-rail output buffers guaranteed monotonic over the commercial temperature range of 0°C to 70°C. The part utilizes a 14-lead DFN package and includes double-buffered data latches for simplified system timing.

Feature Summary

• Octal architecture with 10-bit resolution and 4.096V full-scale output
• Integrated precision reference with ±10ppm/°C drift
• Rail-to-rail output buffers with ultralow DAC-to-DAC crosstalk (<3nV•s)
• I2C interface with selectable power-on reset to mid-scale in external reference mode

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Portable battery-powered instrumentation
• Optical networking components

Procurement Notes

Verify the specific ordering suffix HMX, which configures the power-on reset behavior to mid-scale when using an external reference. Confirm the C-grade designation aligns with the required 0°C to 70°C operating environment. Ensure the DFN package footprint matches the PCB layout constraints for the 14-lead plastic DFN form factor.

Selection Notes

Select this component when eight independent voltage outputs are required within a compact footprint. The H suffix indicates suitability for applications needing a 4.096V span, necessitating a minimum 4.5V supply. The MX reset option is critical if the system requires defined mid-scale states upon initialization rather than zero-scale. Verify that the I2C bus speed requirements do not exceed 400kHz.

Part Context

This part belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions in both DFN and MSOP packages. The CDE variant specifically denotes the commercial temperature grade and the 14-lead DFN housing. Other family members include the LTS series for lower voltage operation and the IMS variants for industrial temperature ranges.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2637 variants such as the LTC2637CDE-LMX10#TRPBF for different reset behaviors or the LTC2637IDE-HMX10#TRPBF for extended temperature ranges. Cross-family substitution may require schematic review due to differing supply voltage requirements between L and H grades.