LTC2631HTS8-HM8#TRPBF

Overview

The LTC2631HTS8-HM8#TRPBF is a single-channel, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates on 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) of ±2.5 LSBs, a typical settling time of 4.6µs at ±1/4 LSB, and guaranteed monotonicity over the operating temperature range. 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
• I²C interface with selectable addresses via CA0/CA1 pins or fixed address for -M grade
• Power-on reset to mid-scale output
• Rail-to-rail buffered output with low noise characteristics

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a tape and reel packaging format. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to 125°C. Ensure the HM8 suffix correctly identifies the 8-bit resolution, mid-scale reset, and 4.096V full-scale configuration as per the manufacturer's part numbering guide.

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 H-grade is required for environments exceeding 85°C. The -M suffix fixes the I²C address, simplifying board layout if multiple devices are not used on the same bus. Verify that the system supply voltage remains within the 4.5V to 5.5V range specified for the H-series.

Part Context

This part belongs to the LTC2631 family of single-channel DACs. It shares the same package and core architecture as the 10-bit (LTC2631HTS8-HM10) and 12-bit (LTC2631HTS8-HM12) versions. The primary distinction lies in the resolution and associated linearity specifications, with the 8-bit version providing ±0.5 LSB DNL and ±2.5 LSB INL.

Replacement Considerations

Direct pin-for-pin replacements within the same family include LTC2631HTS8-HM10#TRPBF and LTC2631HTS8-HM12#TRPBF. These alternatives offer higher resolution but maintain identical pinouts, supply requirements, and software compatibility.