LTC2668CUJ-12#TRPBF

Overview

The LTC2668CUJ-12#TRPBF is a 16-channel, 12-bit digital-to-analog converter (DAC) family member from Analog Devices Inc. It features SoftSpan technology allowing independently programmable output ranges of 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 parameters include a settling time of 15.5µs for a ±10V step, an integral nonlinearity (INL) of ±4 LSB, and a differential nonlinearity (DNL) of ±0.5 LSB. It operates on analog supplies of 4.5V to 15.75V and a digital supply of 1.71V to 5.5V.

Feature Summary

• 16 independent channels with 12-bit resolution in a 40-lead 6mm × 6mm QFN package
• SoftSpan capability for five selectable output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V
• Integrated 2.5V reference with 10ppm/°C max temperature coefficient
• A/B toggle functionality via software command or dedicated TGP pin

Applications

• Optical networking systems
• Precision instrumentation
• Data acquisition systems
• Automatic test equipment
• Process control and industrial automation

Procurement Notes

Verify the #TRPBF suffix indicates tape and reel packaging containing 2000 pieces. Confirm the 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the specific lot date code meets project requirements as manufacturing schedules vary.

Selection Notes

Select this model over the 16-bit variant if 12-bit resolution is sufficient for the application's accuracy requirements. The 12-bit version offers faster settling times (15.5µs vs 20.5µs for ±10V steps). Verify that the required output voltage swing does not exceed the ±10V limit defined by the internal reference configuration.

Part Context

This component belongs to the LTC2668 family, which includes 16-bit and 12-bit variants in both tube and tape-and-reel packaging. The CUJ-12 designation specifically identifies the 12-bit resolution, commercial temperature grade, and QFN package type within the broader SoftSpan DAC portfolio.

Replacement Considerations

Direct functional replacements include other LTC2668 variants such as LTC2668IUJ-12#TRPBF for industrial temperature range (-40°C to 85°C) or LTC2668HUJ-12#TRPBF for automotive range (-40°C to 125°C). Cross-model substitution requires verifying pin compatibility and thermal performance differences.