LTC2637IDE-HMX8#PBF

Overview

The LTC2637IDE-HMX8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a 10ppm/°C temperature coefficient, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Octal 8-bit resolution with integrated 4.096V precision reference
• Automotive grade operation from –40°C to 125°C
• Ultralow DAC-to-DAC crosstalk (<3nV•s)
• Double-buffered data latches for glitch-free updates

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel precision
• Portable battery-powered instrumentation
• Optical networking signal generation

Procurement Notes

Verify the H-grade suffix confirms the –40°C to 125°C operating range and 4.5V minimum supply requirement. Confirm the MX suffix indicates power-on reset to mid-scale in external reference mode. Ensure the MSOP-16 package matches the PCB footprint. Check RoHS compliance status as per manufacturer documentation.

Selection Notes

Select this part when eight independent voltage outputs are required in a compact surface-mount package. The H-grade variant is necessary for automotive or high-temperature industrial environments. The MX reset option suits applications where a known mid-scale state is preferred upon startup. Compare settling time specifications against system update rate requirements.

Part Context

This component belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions. The IDE designation indicates Industrial temperature grade (-40°C to 85°C), but the H-grade suffix overrides this to Automotive grade (-40°C to 125°C). The MSOP package provides a 16-lead form factor suitable for space-constrained designs compared to the 14-lead DFN option.

Replacement Considerations

LTC2637HMS-HMI8#PBF: Identical electrical performance but resets to mid-scale in internal reference mode. LTC2637HMS-HZ8#PBF: Resets to zero-scale in internal reference mode. Verify pin compatibility and reset behavior differences before substitution.