LTC2631ITS8-HM8#TRPBF

Overview

The LTC2631ITS8-HM8#TRPBF 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 within a supply voltage range of 4.5V to 5.5V. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical characteristics include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a typical settling time of 4.6µs at ±1/4 LSB accuracy, and a power-on reset function that defaults the output to mid-scale. The component is housed in an 8-lead TSOT-23 package and supports operation from –40°C to 125°C.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• I²C interface with selectable addresses via CA0/CA1 pins or fixed address for -M grade
• Power-on reset to mid-scale output for consistent system initialization
• Rail-to-rail buffered output guaranteed monotonic over temperature

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a tape and reel packaging format. Confirm the H-grade designation matches the required automotive temperature range of –40°C to 125°C. Ensure the supply voltage environment meets the minimum 4.5V requirement for the internal 4.096V reference mode. Cross-reference the pinout for the TSOT-23 package to ensure compatibility with the PCB footprint design.

Selection Notes

Select this part when an 8-bit resolution is sufficient for the application's voltage control needs. The HM suffix indicates a mid-scale power-on reset, which is critical if the system requires a known non-zero state upon startup. The H-grade is necessary for high-temperature environments exceeding 85°C. For applications requiring lower supply voltages (2.7V–5.5V), the L-grade variant should be considered instead.

Part Context

This component belongs to the LTC2631 family of single-channel DACs, which also includes 10-bit and 12-bit variants. The family shares common architectural features such as the I²C interface and ThinSOT package but differs in resolution, linearity specifications, and power-on reset behaviors. The -HM8 designation specifically identifies the 8-bit resolution, mid-scale reset, and 4.096V full-scale configuration within this product line.

Replacement Considerations

Direct replacements within the same family include LTC2631ITS8-LM8#TRPBF for lower voltage operation or LTC2631ITS8-HZ8#TRPBF if zero-scale reset is preferred. Higher resolution options like the LTC2631ITS8-HM10#TRPBF or LTC2631ITS8-HM12#TRPBF offer improved linearity but may require software adjustments for register mapping.