LTC2637HMS-LMX10#TRPBF

Overview

The LTC2637HMS-LMX10#TRPBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. 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, power-on reset functionality set to mid-scale for external reference mode, and rail-to-rail output buffers guaranteed monotonic over the -40°C to 125°C automotive temperature range.

Feature Summary

• Octal architecture providing eight independent 10-bit DAC channels in a single package
• Integrated 4.096V precision reference with low drift of ±10ppm/°C
• I2C-compatible serial interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset circuit configured to initialize outputs to mid-scale

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 that the specific suffix LMX10 corresponds to the intended power-on reset behavior (mid-scale in external reference mode) and resolution (10-bit). Confirm the H-grade designation matches the required 4.5V to 5.5V supply range and -40°C to 125°C operating temperature. Ensure the MSOP-16 package footprint aligns with the PCB layout constraints.

Selection Notes

Select this component when multiple isolated voltage outputs are needed with minimal board space. The H-grade variant is necessary for applications requiring a 4.096V full-scale range powered by 5V supplies. The LMX suffix is appropriate if the system requires outputs to settle at mid-scale upon power-up rather than zero-scale or mid-scale in internal reference mode.

Part Context

This part belongs to the LTC2637 family, which includes 8-bit, 10-bit, and 12-bit variants. The 'H' indicates the automotive grade with extended temperature range and higher supply voltage requirements compared to the 'L' grade. The 'MS' denotes the 16-lead MSOP package, while 'DE' would indicate the 14-lead DFN package.

Replacement Considerations

Direct substitutes within the same family include LTC2637HMS-LMI10#TRPBF (different power-on reset behavior) and LTC2637HMS-HZ10#TRPBF (zero-scale reset). Cross-family replacements like the LTC2630 require interface changes as they utilize SPI/Microwire instead of I2C.