LTC2637HDE-HMI8#PBF

Overview

The LTC2637HDE-HMI8#PBF 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 and operates on a single 4.5V to 5.5V supply. The device utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) of ±0.5 LSB, a settling time of 3.9µs at ±1 LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. It 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 16-lead MSOP package
• Integrated 4.096V reference with 10ppm/°C temperature coefficient
• Rail-to-rail buffered outputs guaranteed monotonic over –40°C to 125°C
• I2C interface with selectable slave addresses via CA0–CA2 pins

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Portable battery-powered instrumentation
• Automotive electronic control units

Procurement Notes

Verify the specific ordering suffix HDE against official documentation to confirm the combination of Automotive grade (H), Industrial temperature range (I), and DFN package (DE). Cross-reference the datasheet's Order Information table to ensure the part number corresponds to the intended resolution, reset code, and package type before procurement.

Selection Notes

Select this component for applications requiring multiple low-cost, high-accuracy voltage outputs controlled via I2C. The H-grade designation indicates suitability for automotive environments up to 125°C. Ensure the system supply voltage remains within the 4.5V to 5.5V range required for the 4.096V internal reference configuration.

Part Context

This part belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 12-bit variants. The family shares identical pinouts and functional blocks, differing primarily in resolution, internal reference voltage options (2.5V or 4.096V), and available package styles such as 14-lead DFN and 16-lead MSOP.

Replacement Considerations

Direct substitutes within the same family include other LTC2637 resolutions like the LTC2637HDE-HMI10#PBF or LTC2637HDE-HMI12#PBF. For SPI-based interfaces, the LTC2636 series offers equivalent performance but requires a different communication protocol.