LTC2637HDE-HMX10#PBF

Overview

The LTC2637HDE-HMX10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a 10ppm/°C temperature coefficient, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. This specific part number utilizes a 14-lead DFN package and incorporates a power-on reset circuit configured to initialize outputs to mid-scale when using the external reference mode.

Feature Summary

• Octal architecture with eight independent 10-bit DAC channels in a compact 14-lead DFN package
• Integrated precision reference yielding a 4.096V full-scale output with ±10ppm/°C drift
• Power-on reset function set to mid-scale for external reference configurations
• Ultralow crosstalk between DACs (<3nV•s) and double-buffered data latches

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Automotive electronic modules operating in harsh thermal environments
• Portable battery-powered instrumentation

Procurement Notes

Verify that the H-grade suffix confirms the –40°C to 125°C automotive temperature rating required for the application environment. Confirm the DE suffix matches the 14-lead DFN footprint constraints on the PCB layout. Ensure the MX designation aligns with the system's power-on reset strategy for external reference usage. Check for RoHS compliance markings consistent with the #PBF lead-free designation.

Selection Notes

Select this component when eight isolated voltage outputs are necessary within a limited board area. The H-grade variant is appropriate for applications exceeding the industrial temperature limit of 85°C. The MX reset option is suitable if the system requires known mid-scale states upon startup rather than zero-scale. Consider the 4.5V minimum supply requirement, which may necessitate higher voltage rails compared to the L-grade 2.7V variants.

Part Context

This device belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolution options alongside L-grade (2.5V) and H-grade (4.096V) reference variations. The HDE suffix specifically denotes the H-grade performance level combined with the DFN package form factor. Other family members include MSOP packages and different reset configurations such as Z (zero-scale) or MI (mid-scale internal).

Replacement Considerations

Direct replacements within the same family include LTC2637HDE-HMI10#PBF for mid-scale internal reset or LTC2637HDE-HZ10#PBF for zero-scale reset. For package changes, the LTC2637HMS-HMX10#PBF provides identical electrical characteristics in a 16-lead MSOP housing.