LTC2637CDE-LZ8#PBF

Overview

The LTC2637CDE-LZ8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates a high-accuracy, low-drift 10ppm/°C reference with a full-scale output of 2.5V. The device operates on a single 2.7V to 5.5V supply and features rail-to-rail output buffers guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication occurs via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset defaults outputs to zero-scale in internal reference mode.

Feature Summary

• Octal architecture with eight independent 8-bit DAC channels
• Integrated precision reference providing 2.5V full-scale output
• Rail-to-rail output buffers with guaranteed monotonicity
• I2C-compatible serial interface with selectable slave addresses

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify that the ordering suffix #PBF confirms lead-free construction compliant with RoHS standards. Confirm the DE package designation corresponds to the 14-lead 4mm x 3mm DFN form factor. Ensure the LZ8 suffix matches the required zero-scale power-on reset behavior and 8-bit resolution for the specific design implementation.

Selection Notes

Select this part when eight independent voltage outputs are required within a compact footprint. The C-grade temperature rating suits applications operating between 0°C and 70°C. For designs requiring mid-scale reset or external references, consider alternative suffixes such as MI or MX. Verify supply voltage constraints align with the 2.7V to 5.5V range specified for the L-series full-scale voltage.

Part Context

This component belongs to the LTC2637 family, which includes variants with 10-bit and 12-bit resolutions. Other packages include the 16-lead MSOP (MS suffix). Higher grade versions like the H-series support automotive temperatures up to 125°C but require higher supply voltages for their 4.096V full-scale output. The CDE-LZ8 variant specifically targets cost-sensitive commercial applications requiring 8-bit precision.

Replacement Considerations

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