LTC2668CUJ-16#PBF

Overview

The LTC2668CUJ-16#PBF is a 16-channel, 16-bit digital-to-analog converter (DAC) family member from Analog Devices Inc. It features SoftSpan technology allowing five independently programmable output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V. The device integrates a precision 2.5V reference with a maximum temperature coefficient of 10ppm/°C. Key electrical specifications include a maximum Integral Nonlinearity (INL) error of ±4 LSB at 16 bits, a typical settling time of 20.5 µs for a ±10V step, and guaranteed monotonicity over the operating temperature range. It operates on analog supplies from 4.5V to 15.75V and a digital interface supply from 1.71V to 5.5V.

Feature Summary

• 16-Channel 16-Bit Resolution with SoftSpan Output Ranges
• Integrated Precision Reference (10ppm/°C Max)
• A/B Toggle Capability via Software or Dedicated Pin
• 3-Wire SPI/Microwire Interface up to 50MHz

Applications

• Optical Networking
• Instrumentation
• Data Acquisition
• Automatic Test Equipment
• Process Control and Industrial Automation

Procurement Notes

Verify the suffix #PBF indicates lead-free compliance. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the UJ package type matches the required 40-lead QFN footprint. Cross-reference the specific part number against the manufacturer's current product selection guide to confirm availability status.

Selection Notes

Select this component when 16 channels are required in a compact 6mm x 6mm QFN package. Choose the CUJ-16 variant specifically for commercial temperature applications (0°C to 70°C). Consider the internal reference if system noise budgets allow; otherwise, utilize the REF pin for external references to improve gain drift performance under high thermal loads. Verify that the required output ranges fit within the specified softspan configurations.

Part Context

This part belongs to the LTC2668 family, which also includes 12-bit resolution variants (LTC2668-12) and industrial/automotive temperature grades (I and H). The CUJ-16#PBF is the commercial grade version. Other packages include 8-channel and 4-channel versions in smaller footprints. The device shares the same core architecture and interface protocols across the family.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.