LTC2637IDE-LMI8#PBF

Overview

The LTC2637IDE-LMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches and a power-on reset circuit configured to reset outputs to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over the operating range
• Ultralow crosstalk between DACs (<3nV•s) and low power consumption

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the package type corresponds to the 16-lead MSOP variant as indicated by the 'MS' segment in the part number. Ensure the temperature grade 'I' matches the required -40°C to 85°C operational environment for the application design.

Selection Notes

Select this component when eight independent voltage outputs are required within a compact footprint. The 8-bit resolution suits applications where moderate accuracy is sufficient. Choose the 'L' variant for lower supply voltages (2.7V–5.5V) or the 'H' variant if a higher 4.096V full-scale output is needed with a 4.5V–5.5V supply. Verify that the I2C address configuration pins (CA0, CA1, CA2) can be set appropriately for the system bus.

Part Context

This part belongs to the LTC2637 family, which also offers 10-bit and 12-bit resolution options. The family shares identical pinouts and functional blocks, differing primarily in resolution, linearity specifications, and full-scale voltage ranges determined by the internal reference. The 'IDE' designation specifies the Industrial temperature grade (-40°C to 85°C) and the MSOP package style.

Replacement Considerations

Direct substitutes within the same family include LTC2637IDE-LZ8#PBF (Zero-Scale reset) and LTC2637IDE-HMI8#PBF (4.096V Full-Scale). Cross-family replacements like the LTC2635 offer quad-channel configurations but require verification of pin compatibility and performance parameters.