LTC2633CTS8-LI12#TRMPBF

Overview

The LTC2633CTS8-LI12#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 ±1.5 LSB, a settling time of 4.0µs at 3V, and a supply current of 0.4mA at 3V. The part includes a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Dual 12-bit resolution with rail-to-rail output buffers
• Integrated 2.5V precision reference with 10ppm/°C drift
• Maximum INL error of ±1.5 LSB for high accuracy
• Power-on reset to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the #TRMPBF suffix indicates a 500-unit tape and reel packaging configuration. Confirm the C temperature grade corresponds to the commercial range of 0°C to 70°C. Ensure the LI12 code matches the required 2.5V full-scale voltage and mid-scale power-on reset behavior. Cross-reference the manufacturer's latest documentation for any lead-free or RoHS compliance updates.

Selection Notes

Select this component when a compact dual-channel DAC with low power consumption is required. The 2.5V internal reference suits applications where the output span does not exceed 2.5V. Verify that the 2.7V minimum supply voltage aligns with the system's power rails. For higher voltage spans, consider the H-grade variant which supports up to 4.096V but requires a 4.5V minimum supply.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes variants with different resolutions (8-bit, 10-bit), temperature grades (H-grade for -40°C to 125°C), and power-on reset options. The 'A' designation denotes the higher accuracy grade with ±1.5 LSB INL compared to the standard ±2.5 LSB INL of non-A parts. The TSOT-23 package provides a small footprint suitable for space-constrained designs.

Replacement Considerations

Direct replacements within the same family include LTC2633CTS8-LI12#TRPBF (2500-unit reel) or LTC2633HTS8-LI12#TRMPBF (automotive temperature grade). Non-A grade parts like LTC2633CTS8-LI12#TRMPBF offer lower accuracy (±2.5 LSB INL). External reference versions require pin modifications.