LTC2637HMS-LMX12#PBF

Overview

The LTC2637HMS-LMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal 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 utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Each DAC channel includes a rail-to-rail output buffer guaranteed monotonic over the –40°C to 125°C automotive temperature range. The part incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale in external reference mode.

Feature Summary

• Octal architecture with 12-bit resolution and ±2.5LSB maximum integral nonlinearity error
• Integrated 4.096V precision reference with 10ppm/°C drift specification
• Ultralow DAC-to-DAC crosstalk performance (<3nV•s)
• Power-on reset logic set to mid-scale for external reference configurations

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Automotive electronic modules
• Optical networking infrastructure components

Procurement Notes

Verify that the specific suffix LMX12 corresponds to the required power-on reset behavior and resolution. Confirm the MSOP package variant matches the target PCB footprint. Ensure the operating environment stays within the specified 4.5V to 5.5V supply range for the H-grade device.

Selection Notes

Select this component when eight independent voltage channels are required in a compact surface-mount package. The H-grade designation ensures operation up to 125°C, suitable for harsh environments. Choose between internal or external reference modes based on system noise and accuracy requirements.

Part Context

This part belongs to the LTC2637 family of octal DACs available in DFN and MSOP packages. Variants differ by resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and temperature grade (Commercial, Industrial, or Automotive). The H-grade specifically targets automotive applications with extended thermal capabilities.

Replacement Considerations

Direct substitutes include other LTC2637 variants such as LTC2637HMI12#PBF or LTC2637HZ12#PBF, depending on the desired power-on reset state and reference configuration.