LTC2637HDE-LZ10#PBF

Overview

The LTC2637HDE-LZ10#PBF is an octal 10-bit voltage-output digital-to-analog converter featuring an integrated 4.096V precision reference with a temperature coefficient of 10ppm/°C. It operates from a single 4.5V to 5.5V supply and includes a rail-to-rail output buffer guaranteed monotonic over the –40°C to 125°C automotive temperature range. The device communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset defaults to zero-scale in internal reference mode, and it offers low power consumption of approximately 100µA per DAC channel.

Feature Summary

• Octal 10-bit architecture with integrated 4.096V, 10ppm/°C reference
• Automotive grade operation from –40°C to 125°C
• Rail-to-rail output buffer with guaranteed monotonicity
• I2C interface with selectable address pins CA0-CA2

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment

Procurement Notes

Verify the H suffix confirms the 4.5V–5.5V supply range and 4.096V full-scale output. Confirm the LZ10 designation indicates 10-bit resolution with zero-scale power-on reset behavior. Ensure the DE package corresponds to the 14-lead DFN form factor. Validate the PBF suffix for lead-free compliance against specific project requirements.

Selection Notes

Select this part when eight independent 10-bit channels are required within a compact footprint. The H-grade variant is necessary for applications demanding operation up to 125°C junction temperature. The zero-scale reset option suits systems requiring outputs to start at ground potential upon power-up. Verify that the 4.5V minimum supply voltage aligns with the system's available power rails.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 8-bit and 12-bit variants. The 'L' suffix denotes a 2.5V full-scale output with a lower 2.7V supply minimum, whereas the 'H' suffix provides 4.096V full-scale requiring a higher 4.5V supply. The 'DE' package identifies the 14-lead DFN format, distinct from the 16-lead MSOP option.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation.