LTC2631ITS8-LZ12#TRPBF

Overview

The Analog Devices LTC2631ITS8-LZ12#TRPBF is a single-channel, 12-bit voltage-output digital-to-analog converter 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 supply voltage ranging from 2.7V to 5.5V. 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 error of ±1 LSB, a typical settling time of 4.1µs, and a power-down current of 1.8µA maximum. 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 function defaults output to zero-scale

Applications

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

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the Tape and Reel packaging format as specified in the manufacturer's documentation. Confirm the temperature grade 'I' matches the required operating range of –40°C to 85°C for the specific application environment. Ensure the internal reference mode selection aligns with the system's power-up state requirements, as this variant resets to zero-scale.

Selection Notes

Select this component when a compact 12-bit DAC with high accuracy (±1 LSB INL) and low power consumption is required. The Industrial temperature grade (-40°C to 85°C) makes it suitable for broader environmental conditions than Commercial grades. Choose this part over the H-grade if the system supply voltage may drop below 4.5V, as the L-grade supports operation down to 2.7V. Verify that the I²C address configuration using CA0 and CA1 pins does not conflict with other devices on the bus.

Part Context

This part belongs to the LTC2631 family of single-channel DACs, which also includes variants with different resolutions (8-bit, 10-bit), full-scale voltages (4.096V), and power-on reset behaviors (mid-scale). The 'I' designation indicates the Industrial temperature range, while 'Z' specifies the zero-scale reset option. The 'TS8' denotes the 8-lead ThinSOT (TSOT-23) package type common across the series.

Replacement Considerations

Direct replacements within the same family include the LTC2631IMS8-LZ12#TRPBF (Commercial grade, 0°C to 70°C) or the LTC2631HTS8-LZ12#TRPBF (Automotive grade, -40°C to 125°C), provided the temperature range fits the application. For mid-scale reset functionality, consider the LTC2631ITS8-LM12#TRPBF. External reference versions like the LTC2631ITS8-LZ12#TRMPBF are pin-compatible but require external reference components.