LTC2637HMS-HMI8#TRPBF

Overview

The LTC2637HMS-HMI8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a 10ppm/°C temperature coefficient, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 4.096V full-scale reference with ±10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• I2C interface with selectable slave addresses via CA0–CA2 pins

Applications

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

Procurement Notes

Verify the H suffix indicates the automotive grade operating range of –40°C to 125°C. Confirm the MS package corresponds to the 16-lead MSOP form factor. Ensure the TRPBF suffix denotes tape and reel packaging containing 2500 pieces. Cross-reference the specific ordering code against official distributor catalogs for current availability status.

Selection Notes

Select this part when eight isolated analog outputs are required within a compact footprint. The H-grade variant is necessary for environments exceeding 85°C. Use external reference mode if system-wide voltage regulation differs from the internal 4.096V target. Verify I2C bus capacitance limits do not exceed the specified 400pF per line for reliable communication at 400kHz.

Part Context

This component belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions. The H suffix distinguishes it from commercial (C) and industrial (I) grades by extending the operating temperature range to 125°C. The MS designation identifies the 16-lead Mini Small Outline Package, while DE would indicate the 14-lead DFN option.

Replacement Considerations

Direct pin-compatible substitutes include other LTC2637 variants with different resolutions or reference voltages, such as LTC2637HMS-HMX8#TRPBF for external reference operation. Non-pin-compatible alternatives may require schematic redesign due to differing pinouts or power requirements.