LTC2637HDE-LMX10#PBF

Overview

The LTC2637HDE-LMX10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. 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 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 external reference mode. The component is housed in a 14-lead DFN package.

Feature Summary

• Octal 10-bit resolution with rail-to-rail buffered outputs
• Integrated precision reference yielding 4.096V full-scale output
• Power-on reset to mid-scale for external reference mode
• Ultralow DAC-to-DAC crosstalk (<3nV•s)

Applications

• Process control and industrial automation systems
• Portable equipment requiring low power consumption
• Automatic test equipment
• Automotive applications

Procurement Notes

Verify the specific ordering suffix LMX10 against the manufacturer's current documentation to confirm the power-on reset behavior and pin configuration. Ensure the design supports the required 4.5V to 5.5V supply range for the H-grade variant. Confirm that the 14-lead DFN package footprint matches the PCB layout requirements.

Selection Notes

Select this part when an octal DAC with a fixed 4.096V internal reference is required. The LMX suffix indicates a mid-scale reset in external reference mode; choose LZ8/LZ10/LZ12 for zero-scale reset or LMI for internal reference mid-scale reset. Ensure the application environment stays within the -40°C to 125°C operating temperature range specified for the H-grade device.

Part Context

This component belongs to the LTC2637 family, which includes 8-, 10-, and 12-bit variants. The 'H' designation specifies the automotive temperature grade (-40°C to 125°C) and the 4.096V internal reference. The 'DE' indicates the 14-lead DFN package, while 'LMX' defines the specific power-on reset logic for external reference configurations.

Replacement Considerations

LTC2637HDE-HMX10#PBF: Identical electrical specifications but with a different power-on reset behavior (mid-scale in internal reference mode). Verify if the reset state change impacts system initialization.