LTC2633CTS8-LX8

Overview

The LTC2633CTS8-LX8 is a dual-channel, 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 –40°C to 125°C temperature range, and a power-on reset function that sets outputs to mid-scale in external reference mode.

Feature Summary

• Dual 8-bit DACs with integrated 2.5V precision reference (10ppm/°C drift)
• I²C interface with selectable internal or external reference input
• Rail-to-rail output buffers guaranteed monotonic from –40°C to 125°C
• Power-on reset to mid-scale in external reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Portable equipment

Procurement Notes

Verify the specific ordering suffix 'LX8' against the manufacturer's current product selection guide to confirm availability and exact power-on reset behavior. Confirm package type TSOT-23 compatibility with PCB footprint requirements. Check for lead-free designator compliance if required by assembly specifications.

Selection Notes

Select this part when dual low-resolution channels are needed with minimal component count. The 'L' suffix indicates a 2.5V full-scale internal reference, suitable for 2.7V–5.5V supplies. The 'X' suffix configures power-on reset to mid-scale in external reference mode. Ensure the application requires 8-bit resolution; higher accuracy options like the LTC2633A series offer tighter INL specifications.

Part Context

This component belongs to the LTC2633 family of dual DACs, which also includes 10-bit and 12-bit variants (e.g., LTC2633-LX10, LTC2633-LX12). The family shares the same 8-lead TSOT-23 package and I²C interface architecture but differs in resolution, linearity accuracy, and supply voltage requirements depending on the internal reference voltage selected.

Replacement Considerations

Direct replacements within the same family include LTC2633CTS8-LZ8 (zero-scale reset) or LTC2633CTS8-LI8 (mid-scale reset in internal reference mode). For higher accuracy, consider the LTC2633A series. Verify pinout and software register compatibility when substituting different reset configurations.