LTC2631ITS8-HM8#TRMPBF

Overview

The LTC2631ITS8-HM8#TRMPBF is a single-channel, 8-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 from a 4.5V to 5.5V supply. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key specifications include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a typical settling time of 4.6µs at ±1/4 LSB accuracy, and low power consumption of 200µA at 5V. It incorporates a power-on reset circuit configured to initialize the output to mid-scale upon power-up.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• 8-bit resolution with guaranteed monotonicity over temperature
• I²C interface with selectable addresses via CA0/CA1 pins
• Power-on reset to mid-scale option

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 indicates a 500-unit tape and reel packaging configuration as defined in the manufacturer's documentation. Confirm that the H-grade designation matches the required -40°C to 125°C operating temperature range for the target application environment. Ensure supply voltage constraints between 4.5V and 5.5V are strictly maintained.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application, offering lower cost compared to 10- or 12-bit variants. The HM suffix specifies a mid-scale power-on reset, which is critical for systems requiring a known initial state other than zero. The H-grade temperature rating is necessary for automotive or harsh industrial environments exceeding 85°C. Verify that the 4.096V full-scale output aligns with downstream input requirements.

Part Context

This part belongs to the LTC2631 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The ITS8 package denotes an 8-lead TSOT-23 form factor. The 'H' grade provides extended temperature capability (-40°C to 125°C), while 'M' indicates the mid-scale reset function. Other variants include 'L' for 2.5V full-scale, 'Z' for zero-scale reset, and 'A' for improved linearity specifications.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2631ITS8-LM8#TRMPBF (2.5V FS, wider supply range) or LTC2631ITS8-HZ8#TRMPBF (zero-scale reset). For higher resolution needs, consider LTC2631ITS8-HM10#TRMPBF or LTC2631ITS8-HM12#TRMPBF. Ensure the replacement maintains the 4.5V minimum supply requirement if using H-grade parts.