LTC2631ITS8-LZ12#TRMPBF

Overview

The LTC2631ITS8-LZ12#TRMPBF is a single 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 4.096V, requiring a supply voltage between 4.5V and 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 (INL) error of ±2.5 LSBs, a typical settling time of 4.6µs at ±1LSB, and a power-on reset function that clears the output to zero-scale upon power-up.

Feature Summary

• Integrated 10ppm/°C precision reference providing a 4.096V full-scale output
• I²C serial interface with bidirectional data transfer up to 400kHz
• Power-on reset circuit configured to clear DAC output to zero-scale
• Guaranteed monotonic operation over the specified temperature range

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 suffix #TRMPBF indicates a 500-unit tape and reel packaging configuration as defined in the manufacturer's ordering information. Confirm the 'H' grade designation matches the required -40°C to 125°C automotive temperature range for the application environment. Ensure the 'Z' suffix aligns with the zero-scale power-on reset requirement rather than mid-scale options.

Selection Notes

Select this part when a 12-bit resolution with a 4.096V internal reference is required in a compact TSOT-23 form factor. The H-grade temperature rating (-40°C to 125°C) is necessary for automotive or harsh industrial environments. Verify that the system power supply remains within the 4.5V to 5.5V range, as lower voltages will not support the internal 4.096V reference generation.

Part Context

This component belongs to the LTC2631 family of single-channel DACs, which also includes variants with 10-bit and 8-bit resolutions, different full-scale voltages (2.5V), and alternative power-on reset behaviors. The LTS8 package denotes the 8-lead plastic ThinSOT-23 footprint. The 'A' electrical grade is absent, indicating standard linearity performance rather than the tighter ±1LSB INL specification found in LTC2631A models.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2631ITS8-HM12#TRMPBF (mid-scale reset) or LTC2631ITS8-LZ12#TRMPBF (2.5V full-scale). Cross-family replacements require verification of I²C address compatibility and reference voltage levels.