LTC2633CTS8-LO8#TRMPBF

Overview

The LTC2633CTS8-LO8#TRMPBF is a dual 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features a selectable internal or external reference, with the internal option providing a 2.5V full-scale output 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. Key specifications include rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C range, and a power-on reset configuration that sets outputs to high impedance.

Feature Summary

• Dual 8-bit DACs with integrated precision reference (2.5V full-scale, 10ppm/°C drift)
• I²C-compatible serial interface with standard (100kHz) and fast (400kHz) clock rates
• Power-on reset to high impedance state for safe initialization
• Rail-to-rail output buffers with guaranteed monotonic operation from –40°C to 125°C

Applications

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

Procurement Notes

Verify the #TRMPBF suffix indicates a 500-unit tape and reel packaging format, distinct from the standard 2,500-unit reel. Confirm the C-grade designation aligns with commercial temperature requirements if extended ranges are needed. Ensure the LO8 code matches the specific high-impedance power-on reset requirement for the target application design.

Selection Notes

Select this part when a dual-channel, low-pin-count DAC with a defined high-impedance startup state is required. The 8-bit resolution suits applications where cost and pin count are prioritized over high precision. Verify that the 2.5V internal reference span meets the system voltage requirements, or plan for an external reference input if higher voltage swings are necessary.

Part Context

This component belongs to the LTC2633 family of dual DACs, which offers various combinations of resolution (8-, 10-, 12-bit), accuracy grades (standard vs. A-grade), and power-on reset behaviors. The LO8 variant specifically targets applications needing a safe, high-impedance output state upon power-up to prevent unintended signals to downstream circuitry.

Replacement Considerations

Direct replacements within the same family include LTC2633CTS8-LI8#TRMPBF (mid-scale reset) or LTC2633CTS8-LZ8#TRMPBF (zero-scale reset). For different resolutions, consider LTC2633CTS8-LO10#TRMPBF or LTC2633CTS8-LO12#TRMPBF, ensuring the I²C address and register compatibility remain consistent.