LTC2637HDE-HMI8#TRPBF

Overview

The LTC2637HDE-HMI8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output with a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and 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 ±0.5 LSB, a settling time of 3.9µs at ±1 LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. The unit incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Octal architecture with 8 independent 8-bit channels in a 14-lead DFN package
• Integrated 4.096V reference with 10ppm/°C drift specification
• I2C interface with selectable slave addresses via CA0 pin
• Power-on reset to mid-scale in internal reference mode

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 #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the H-grade designation ensures operation within the –40°C to 125°C automotive temperature range. Ensure the DE package code corresponds to the 14-lead 4mm × 3mm DFN form factor required for the design.

Selection Notes

Select this part when eight isolated voltage outputs are required with high channel density. The H-grade variant is necessary for environments exceeding 85°C. Verify that the 4.096V internal reference span matches the system requirements; otherwise, consider external reference configurations or different full-scale options like the LTC2637-L series.

Part Context

This component belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolution variants. The HDE suffix specifically denotes the 8-bit resolution, H-grade temperature rating, and 14-lead DFN package type. Other family members share similar electrical characteristics but differ in resolution, package footprint, and operating voltage ranges.

Replacement Considerations

Direct functional equivalents within the same package and pinout include other LTC2637 variants such as the LTC2637HDE-HZ8#TRPBF, which differs only in the power-on reset behavior (zero-scale vs. mid-scale). Cross-family replacements like the LTC2636 require SPI interface adaptation.