LTC2631ACTS8-HZ12#TRMPBF

Overview

The LTC2631ACTS8-HZ12#TRMPBF 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 nine selectable slave addresses via CA0 and CA1 pins
• Power-on reset option to zero-scale for consistent system initialization

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity, distinct from the standard 2,500-piece TR configuration. Confirm that the 'H' temperature grade designation in the base model corresponds to the automotive range (-40°C to 125°C), while the 'C' grade in the provided part number denotes the commercial range (0°C to 70°C). Ensure compatibility with the required supply voltage range of 2.7V to 5.5V for the specified full-scale voltage.

Selection Notes

Select this component when a single-channel DAC with high DC accuracy (±1 LSB INL) and a compact 8-lead TSOT-23 package is required. The internal 2.5V reference eliminates the need for external reference components, simplifying board space. Choose the HZ variant if zero-scale power-on reset is necessary for safety or initialization constraints. Verify that the I²C bus speed requirements do not exceed 400kHz and that the supply voltage remains within the 2.7V to 5.5V window for optimal performance.

Part Context

This part belongs to the LTC2631 family of single-channel DACs, which also includes 10-bit and 8-bit variants. The family shares common architectural features such as the rail-to-rail buffered output and I²C interface. Variations exist based on resolution, full-scale voltage (2.5V vs 4.096V), temperature grade (C, I, H), and power-on reset behavior (Mid-Scale vs Zero-Scale). The 'A' grade specifically denotes the highest linearity specification within the 12-bit options.

Replacement Considerations

Direct pin-for-pin replacements within the same package must maintain the 12-bit resolution and I²C interface. Consider the LTC2631ACTS8-LZ12#TRMPBF if mid-scale reset is preferred over zero-scale. For applications requiring a higher full-scale voltage, the LTC2631AH series with 4.096V output requires a minimum 4.5V supply. Cross-referencing with other ADI DAC families may require level shifting or software adaptation due to differing register maps.