LTC2633CTS8-LZ12#TRPBF

Overview

The LTC2633CTS8-LZ12#TRPBF 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 providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates on a single 2.7V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Upon power-up, the outputs reset to zero-scale.

Feature Summary

• Dual 12-bit resolution with ±1.5LSB maximum Integral Nonlinearity (INL)
• Integrated 2.5V precision reference with 10ppm/°C drift
• Automotive grade operation from –40°C to 125°C
• Power-on reset to zero-scale for consistent initialization

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging format. Confirm that the C-grade designation aligns with commercial specifications if the application requires the broader automotive temperature range specified by the H-grade, although this part number denotes the H-grade temperature capability despite the C code in the sequence.

Selection Notes

Select this component when a compact dual-channel DAC with high accuracy is required for automotive environments. The LZ12 suffix ensures a zero-scale power-on state, which is critical for systems where downstream circuits must remain inactive during startup. Ensure the supply voltage remains within the 2.7V to 5.5V range for optimal performance with the internal 2.5V reference.

Part Context

This part belongs to the LTC2633 family, which offers various combinations of resolution, reference voltage, and power-on reset behaviors. The LTS8 package identifies the 8-lead ThinSOT form factor. The 'A' electrical grade provides superior linearity compared to the standard grade, while the 'H' temperature grade extends operational limits beyond commercial ranges.

Replacement Considerations

Direct replacements include other LTC2633 variants with matching 12-bit resolution and 2.5V internal reference, such as LTC2633CTS8-LI12#TRPBF, provided the different power-on reset behavior (mid-scale vs. zero-scale) is acceptable for the system design.