LTC2637CDE-LZ12#PBF

Overview

The LTC2637CDE-LZ12#PBF is an octal 12-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 rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit configured to reset outputs to zero-scale upon power-up.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels in a compact 14-lead DFN package
• Integrated 10ppm/°C precision reference yielding a 2.5V full-scale output range
• Rail-to-rail buffered outputs with guaranteed monotonicity over the operating temperature range
• Ultralow crosstalk between DAC channels (<3nV•s) and low power consumption (100µA per DAC at 3V)

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the DE suffix corresponds to the 14-lead 4mm × 3mm DFN package type. Ensure the C temperature grade (0°C to 70°C) meets the environmental requirements for the intended application design.

Selection Notes

Select this part when multiple isolated voltage outputs are required within a space-constrained design. The LZ12 suffix specifies a 12-bit resolution with a 2.5V internal reference and zero-scale power-on reset behavior. Consider the H-grade variant if operation above 70°C or a 4.096V output span is necessary.

Part Context

This component belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions in both DFN and MSOP packages. The CDE-LZ12 configuration specifically denotes the commercial temperature grade, DFN footprint, internal 2.5V reference, and 12-bit precision. Other variants include the IMS package and H-grade automotive options.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2637CDE-LZ10#PBF (10-bit) and LTC2637CDE-LZ8#PBF (8-bit). For higher resolution or different reset behaviors, consider the LTC2637I or LTC2637H series variants.