LTC2637CDE-LZ8#TRPBF

Overview

The LTC2637CDE-LZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single 2.7V to 5.5V supply and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the commercial temperature range (0°C to 70°C), and a power-on reset circuit configured to reset outputs to zero-scale.

Feature Summary

• Octal architecture with eight independent 8-bit DAC channels in a 14-lead DFN package
• Integrated 2.5V full-scale reference with 10ppm/°C drift specification
• I²C interface with selectable slave addresses via CA0 pin
• Power-on reset to zero-scale for reliable startup states

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable equipment requiring low power consumption

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the C-grade designation matches the required commercial operating temperature range of 0°C to 70°C. Ensure the DE package type corresponds to the 14-lead DFN form factor required for the design.

Selection Notes

Select this part when eight independent voltage outputs are needed within a compact footprint. The 8-bit resolution suits applications where high precision is not critical but channel count is. Verify that the 2.5V internal reference range meets system requirements; otherwise, consider external reference modes or different full-scale options like the H-grade variant.

Part Context

This component belongs to the LTC2637 family, which also offers 10-bit and 12-bit resolutions. Variants include the MSOP package option and different power-on reset behaviors such as mid-scale initialization. The LZ8 suffix specifically denotes the zero-scale reset configuration with 8-bit resolution.

Replacement Considerations

Direct substitutes within the same family include LTC2637CDE-LZ10#TRPBF for 10-bit resolution and LTC2637CDE-LZ12#TRPBF for 12-bit resolution. For mid-scale reset behavior, consider the LTC2637CDE-MI8#TRPBF variant.