LTC2668IUJ-12#TRPBF

Overview

The LTC2668IUJ-12#TRPBF is a 16-channel, 12-bit digital-to-analog converter (DAC) from Analog Devices Inc., housed in a 40-lead 6mm × 6mm QFN package. It features SoftSpan technology allowing independently programmable output ranges of 0V to 5V, 0V to 10V, ±2.5V, ±5V, or ±10V. The device includes an integrated 2.5V precision reference with a maximum temperature coefficient of 10ppm/°C and rail-to-rail buffered outputs capable of driving ±10mA. It operates on analog supplies ranging from ±4.5V to ±15.75V and digital logic levels as low as 1.71V via a 3-wire SPI interface.

Feature Summary

• 16 independent channels with 12-bit resolution and guaranteed monotonicity
• SoftSpan™ technology for five selectable output ranges up to ±10V
• Integrated 2.5V reference with 10ppm/°C max temperature coefficient
• Rail-to-rail output buffers driving ±10mA load current

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2000 pieces. Confirm the 'I' grade designation corresponds to the industrial operating temperature range of –40°C to 85°C. Ensure the ordering information matches the manufacturer's standard lead time and availability status for this specific part number.

Selection Notes

Select this model when 16 channels are required with independent voltage range programming. The 12-bit resolution offers a balance between cost and performance compared to the 16-bit variant. Verify that the application requires the specific ±10V capability and that the 6mm × 6mm QFN package fits the PCB layout constraints.

Part Context

This component belongs to the LTC2668 family of SoftSpan DACs. The 'I' suffix denotes the industrial temperature grade, while 'UJ' specifies the 40-lead QFN package. The '#TRPBF' suffix indicates lead-free construction and tape-and-reel packaging. It shares architectural similarities with other members like the LTC2668HUJ-12#PBF but differs in packaging and temperature rating.

Replacement Considerations

Direct replacements within the same family include LTC2668CUJ-12#TRPBF (commercial temp) and LTC2668HUJ-12#TRPBF (automotive temp). Cross-model substitution with LTC2664 or LTC2688 requires verification of channel count and pin compatibility.