LTC2637CDE-LMI8#PBF

Overview

The LTC2637CDE-LMI8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features a rail-to-rail output buffer and is guaranteed monotonic over the operating temperature range. The device incorporates an integrated precision reference providing a full-scale output of 2.5V with a drift of 10ppm/°C. It operates on a single supply voltage ranging from 2.7V to 5.5V. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard mode (100kHz) and fast mode (400kHz). The part 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 2.5V precision reference with 10ppm/°C temperature coefficient
• Rail-to-rail output buffers ensuring guaranteed monotonicity
• I2C-compatible serial interface with selectable slave addresses

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 DE package designation corresponds to the 14-lead DFN form factor. Ensure the C grade matches the required commercial temperature range of 0°C to 70°C for the application environment.

Selection Notes

Select this component when eight low-cost, 8-bit voltage outputs are required in a compact footprint. The L variant is suitable for single-supply applications between 2.7V and 5.5V. Consider the H variant if a 4.096V full-scale output or extended temperature range is necessary. Verify that the I2C bus speed requirements align with the standard or fast mode capabilities.

Part Context

This part belongs to the LTC2637 family, which also offers 10-bit and 12-bit resolution options. The CDE-LMI8#PBF specifically denotes the commercial temperature grade, 14-lead DFN package, 2.5V internal reference, and mid-scale power-on reset configuration. Other variants include the MSOP package and different reset behaviors such as zero-scale or external reference modes.

Replacement Considerations

Direct pin-compatible replacements within the same family include other resolution variants like LTC2637CDE-LMI10#PBF or LTC2637CDE-LMI12#PBF, provided higher resolution is acceptable. For different reset behaviors, consider LTC2637CDE-LZ12#PBF for zero-scale reset. Cross-family replacements require verification of interface compatibility and pinout alignment.