LTC2633HTS8-LX8

Overview

The LTC2633HTS8-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 supply voltage ranging from 2.7V to 5.5V 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
• Power-on reset to mid-scale in external reference mode
• Rail-to-rail output buffers with guaranteed monotonicity

Applications

• Mobile communications
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix 'LX8' against the manufacturer's current documentation to confirm the exact power-on reset behavior and package availability. Ensure the design supports the required I²C pull-up configuration and supply voltage range of 2.7V to 5.5V for optimal performance.

Selection Notes

Select this component when a compact dual-channel DAC with low power consumption is required. The 'L' suffix indicates a 2.5V full-scale output suitable for 2.7V–5.5V supplies. The 'X' suffix configures the power-on reset to mid-scale in external reference mode. For higher resolution needs, consider the 10-bit or 12-bit variants within the same family.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes 10-bit and 12-bit resolutions. Variants are available with different power-on reset options (zero-scale, mid-scale) and full-scale voltages (2.5V or 4.096V). The TSOT-23 package provides a small footprint for space-constrained designs.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2633HTS8-LZ8 (zero-scale reset) or LTC2633HTS8-HX8 (4.096V full-scale, requires 4.5V–5.5V supply). Verify that the replacement variant's power-on reset state meets system safety requirements.