LTC2637IMS-HMI8#TRPBF

Overview

The LTC2637IMS-HMI8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a rail-to-rail output buffer and an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. The device operates on a single supply voltage ranging from 4.5V to 5.5V and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates double-buffered data latches and a power-on reset circuit configured to reset to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Rail-to-rail buffered outputs guaranteed monotonic over –40°C to 125°C
• Ultralow DAC-to-DAC crosstalk (<3nV•s typical)

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Portable instrumentation with limited channel count needs

Procurement Notes

Verify the H-grade automotive temperature rating (-40°C to 125°C) and the MSOP-16 package configuration. Confirm the #TRPBF suffix indicates tape and reel packaging containing 2500 pieces. Ensure the specific HMI8 designation matches the required mid-scale power-on reset behavior for internal reference applications.

Selection Notes

Select this part when eight isolated analog outputs are required within a compact footprint. The H-grade variant is necessary for high-temperature environments up to 125°C. The 4.096V full-scale range suits applications needing higher dynamic range than the 2.5V L-grade version. Verify that the I2C bus speed requirements align with the 400kHz fast mode capability.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 12-bit resolution variants. The IMS suffix denotes the 16-lead MSOP package, while the H grade specifies the extended automotive temperature range. The HMI8 code specifically defines the 8-bit resolution combined with the mid-scale power-on reset function.

Replacement Considerations

Direct substitutes within the same family include other resolution variants like the LTC2637IMS-HMI10 or LTC2637IMS-HMI12 if higher precision is acceptable. Lower resolution options such as the LTC2637IMS-LMI8 offer a wider supply voltage range but lower full-scale output.