LTC2631ITS8-HM12#TRMPBF

Overview

The LTC2631ITS8-HM12#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 4.096V and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a 2-wire I²C-compatible serial interface supporting clock rates up to 400kHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.6µs at ±1LSB accuracy, and a power-down current of 4µA maximum for the H-grade. The component is housed in an 8-lead TSOT-23 package and is guaranteed monotonic over the specified temperature range.

Feature Summary

• Integrated 10ppm/°C precision reference providing a 4.096V full-scale output
• I²C serial interface with support for standard (100kHz) and fast (400kHz) modes
• Power-on reset circuit configured to initialize the output to mid-scale
• Guaranteed monotonic operation across the full operating temperature range

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required configuration: 'I' denotes the Industrial temperature grade (-40°C to 85°C), 'H' indicates the 4.096V internal reference capability requiring a 4.5V to 5.5V supply, 'M' specifies the mid-scale power-on reset option, and '12' confirms the 12-bit resolution. Confirm the '#TRMPBF' suffix corresponds to the 500-unit tape and reel packaging format as defined in the manufacturer's documentation.

Selection Notes

Select this part when a compact 12-bit DAC with an integrated high-accuracy reference is required for space-constrained designs. The H-grade variant is necessary if the application demands operation up to 125°C or requires the 4.096V output span. Ensure the system supply voltage remains between 4.5V and 5.5V to meet performance specifications. The mid-scale reset option ('M') is suitable for applications where a known intermediate voltage state is preferred upon power-up compared to zero-scale initialization.

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 vs 4.096V), and alternative temperature grades (Commercial C-grade and Automotive H-grade). The 'ITS8' designation specifically identifies the Industrial temperature range and TSOT-23 package type within this product line.

Replacement Considerations

Direct pin-for-pin replacements within the same family include the LTC2631HTS8-HM12#TRMPBF for automotive temperature requirements or the LTC2631CTS8-HM12#TRMPBF for commercial temperature ranges. Variants such as the LTC2631ITS8-LM12#TRMPBF offer a 2.5V full-scale output instead of 4.096V. Substitutes from other manufacturers require verification of I²C compatibility, reference accuracy, and package dimensions.