LTC2631ACTS8-LZ12#TRPBF

Overview

The LTC2631ACTS8-LZ12#TRPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features an integrated precision reference with a full-scale output of 2.5V and operates from a single 2.7V to 5.5V supply. The device utilizes 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 LSB, a typical settling time of 4.1µs at 3V, and a low power consumption of 180µA at 3V. The part includes a power-on reset circuit configured to clear the output to zero-scale upon initialization.

Feature Summary

• 12-bit resolution with ±1 LSB maximum INL error
• Integrated 10ppm/°C precision reference providing 2.5V full-scale output
• I²C interface with selectable addresses via CA0/CA1 pins
• Power-on reset to zero-scale for consistent system initialization

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems
• Optical networking

Procurement Notes

Verify the specific ordering suffix #TRMPBF or #TRPBF against the required tape and reel quantity, as these indicate different packaging counts (500-piece vs 2,500-piece). Confirm that the C-grade temperature range (0°C to 70°C) aligns with the application environment requirements. Ensure the I²C address configuration using CA0 and CA1 pins matches the system bus topology to prevent address conflicts.

Selection Notes

Select this component when a 12-bit DAC with high DC accuracy (±1 LSB INL) and a compact 8-lead TSOT-23 package is required. The internal 2.5V reference simplifies design by eliminating external reference components. Choose this variant over H-grade parts if the operating supply voltage is below 4.5V, as H-grade devices require a minimum of 4.5V. Consider the Z-suffix for zero-scale reset behavior if safe startup conditions are critical.

Part Context

This part belongs to the LTC2631 family of single-channel DACs, which also includes 10-bit and 8-bit variants (LTC2631-10, LTC2631-8). The family shares identical pinouts and I²C interfaces but differs in resolution, linearity specifications, and full-scale voltage options (2.5V for L-grade, 4.096V for H-grade). The 'A' designation indicates the highest accuracy grade within the 12-bit segment.

Replacement Considerations

Direct replacements within the same family include LTC2631ACTS8-LM12#TRPBF (mid-scale reset) or LTC2631CTS8-LZ12#TRPBF (commercial grade, ±2.5 LSB INL). Cross-family replacements like the LTC2633 series offer dual channels but require different pin configurations.