LTC2637HDE-LZ12#PBF

Overview

The LTC2637HDE-LZ12#PBF is an octal 12-bit voltage-output digital-to-analog converter featuring an integrated precision reference with a 10ppm/°C temperature coefficient. It operates from a single 4.5V to 5.5V supply, providing a full-scale output of 4.096V. The device includes rail-to-rail output buffers and guarantees monotonicity over the automotive temperature range of –40°C to 125°C. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates power-on reset circuits and double-buffered data latches within a 14-lead DFN package.

Feature Summary

• Octal 12-bit resolution with maximum INL error of ±2.5LSB
• Integrated 4.096V full-scale reference with ±10ppm/°C drift
• Automotive grade operation from –40°C to 125°C
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems
• Optical Networking

Procurement Notes

Verify the specific suffix 'H' indicates the automotive temperature grade (–40°C to 125°C) and 'DE' denotes the 14-lead DFN package. Confirm that the 'LZ' suffix corresponds to zero-scale power-on reset behavior in internal reference mode. Ensure the '#PBF' designation confirms lead-free compliance for procurement specifications.

Selection Notes

Select this part when eight independent 12-bit channels are required in a compact footprint. The H-grade variant is necessary for applications operating above 85°C. The LZ reset option ensures outputs start at zero upon power-up. Verify that the 4.5V minimum supply voltage aligns with the system's available power rails compared to the L-grade 2.7V option.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 8-bit variants. The family shares identical pinouts and interfaces but differs in resolution and linearity specifications. The H-grade specifically targets automotive environments requiring extended temperature stability, while the DE package offers a small 4mm × 3mm form factor.

Replacement Considerations

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