LTC2637CDE-HMX8#PBF

Overview

The LTC2637CDE-HMX8#PBF is an octal, 8-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 and a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches, ultralow crosstalk between DACs (<3nV•s), 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 8-bit resolution with rail-to-rail buffered outputs
• Integrated 4.096V precision reference (10ppm/°C)
• I2C interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset to mid-scale for external reference mode

Applications

• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems
• Optical networking

Procurement Notes

Verify the specific ordering suffix HMX8#PBF against the manufacturer's current documentation to confirm the power-on reset behavior and packaging details. Ensure compatibility with the required 4.5V to 5.5V supply range and I2C bus timing specifications before integration.

Selection Notes

Select this part for applications requiring multiple low-cost, low-power voltage outputs controlled by a microcontroller. The H-grade temperature range (-40°C to 125°C) suits automotive or harsh environments. Compare with LTC2637-L variants if a lower 2.7V-5.5V supply range or 2.5V full-scale output is needed.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 12-bit resolutions. Variants are available with different full-scale voltages (2.5V or 4.096V) and power-on reset behaviors. The CDE package denotes the commercial temperature grade and 14-lead DFN form factor.

Replacement Considerations

Direct substitutes within the same family include LTC2637CDE-HZ8#PBF (zero-scale reset) or LTC2637CDE-HMI8#PBF (mid-scale reset in internal reference mode). Cross-resolution equivalents like LTC2637CDE-HMX10#PBF offer higher precision but may require software adjustments.