LTC2633CTS8-LZ12#TRMPBF

Overview

The LTC2633CTS8-LZ12#TRMPBF is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the commercial temperature range of 0°C to 70°C. The part incorporates a power-on reset circuit configured to clear outputs to zero-scale upon initialization.

Feature Summary

• Dual 12-bit resolution with integrated 2.5V precision reference (10ppm/°C drift)
• I²C-compatible serial interface with selectable standard or fast mode clock rates
• Power-on reset function clears DAC outputs to zero-scale for consistent system initialization
• Rail-to-rail output buffers with guaranteed monotonic operation

Applications

• Mobile communications systems
• Process control and industrial automation instrumentation
• Portable battery-powered equipment
• Automotive electronic modules

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-unit tape and reel quantity, distinct from the standard 2,500-unit TR configuration. Confirm that the 'C' temperature grade designation aligns with the required operational range of 0°C to 70°C for the target application environment. Ensure compatibility with the 2.7V to 5.5V supply voltage constraints specified for the LTC2633-L variant.

Selection Notes

Select this component when a compact dual-channel DAC with low pin count is required for space-constrained designs. The LZ12 suffix specifically provides zero-scale power-on reset behavior, which is critical if downstream circuits must remain inactive during startup. Choose the C-grade version for commercial applications where the -40°C to 125°C automotive range is unnecessary. Verify that the 2.5V internal reference meets the system's output voltage swing requirements without external buffering.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes variants with different resolutions (8-bit, 10-bit), accuracy grades (standard vs. A-grade), and temperature ranges (H-grade). The LTS8 package denotes the 8-lead ThinSOT form factor. The LZ12 code specifies the 12-bit resolution, zero-scale reset option, and 2.5V full-scale internal reference configuration unique to this part number within the broader product line.

Replacement Considerations

Direct replacements within the same family include LTC2633CTS8-LI12#TRMPBF (mid-scale reset) or LTC2633CTS8-HZ12#TRMPBF (automotive temperature grade). For quad-channel requirements, consider the LTC2635 series, though pinout and package differences necessitate schematic redesign.