LTC2637IDE-LZ12#PBF

Overview

The LTC2637IDE-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 full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 2.7V to 5.5V. It communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5LSB, a settling time of 4.5µs at ±1LSB, and low power consumption of 100µA per DAC at 3V. The part is housed in a 16-lead MSOP package.

Feature Summary

• Octal 12-bit resolution with rail-to-rail buffered outputs
• Integrated 2.5V precision reference with 10ppm/°C drift
• I2C-compatible serial interface with selectable slave addresses
• Power-on reset to zero-scale in internal reference mode

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 'I' grade designation matches the required industrial temperature range of –40°C to 85°C for the application environment. Ensure the 'L' suffix corresponds to the 2.5V full-scale internal reference requirement rather than the 4.096V option.

Selection Notes

Select this component when eight independent 12-bit voltage outputs are required in a compact form factor. The 'LZ' configuration is appropriate if a zero-scale power-on reset state is preferred over mid-scale initialization. Consider the 16-lead MSOP package for PCB space constraints where a 14-lead DFN is not suitable. Verify that the system supply voltage falls within the 2.7V to 5.5V operating range for optimal performance.

Part Context

This part belongs to the LTC2637 family, which includes 8-bit, 10-bit, and 12-bit variants. The 'IDE' prefix denotes the Industrial temperature grade (-40°C to 85°C) and the 16-lead MSOP package. The 'LZ12' suffix specifies the 2.5V full-scale internal reference and zero-scale power-on reset behavior for the 12-bit resolution version.

Replacement Considerations

Direct functional equivalents within the same family include other LTC2637 variants with different resolutions or reference voltages, such as LTC2637IDE-HZ12#PBF for 4.096V full-scale output. Parts with different power-on reset behaviors like LTC2637IDE-MI12#PBF may require software adjustments to handle mid-scale initialization states.