LTC2657IUFD-H12#TRPBF

Overview

The LTC2657IUFD-H12#TRPBF is an octal, 12-bit digital-to-analog converter (DAC) featuring a high-precision integrated reference with a maximum temperature coefficient of 10ppm/°C. It utilizes a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. The device incorporates rail-to-rail output buffers and guarantees monotonicity over the operating temperature range. Designed for industrial applications, it operates from a single 4.5V to 5.5V supply when using the internal reference. The part includes a power-on reset circuit configurable via the PORSEL pin to initialize outputs to zero-scale or mid-scale.

Feature Summary

• Octal architecture with 8 independent 12-bit DAC channels
• Integrated precision reference yielding 4.096V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (0.8nV•s)
• I²C interface with selectable slave addresses via CA0-CA2 pins

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Instrumentation
• Automatic Test Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging. Confirm the H12 designation matches the required 4.096V full-scale voltage and 12-bit resolution specifications. Ensure the IUFD package type aligns with the PCB footprint requirements.

Selection Notes

Select this component for designs requiring multiple low-cost, precise voltage outputs controlled via I²C. The H-option requires a minimum supply voltage of 4.5V, unlike the L-option which supports 2.7V. Consider the ±1 LSB INL specification for linearity requirements. Verify that the 400kHz clock rate meets system timing constraints.

Part Context

This part belongs to the LTC2657 family of octal DACs. The 'H' suffix indicates the 4.096V internal reference variant, while '12' denotes 12-bit resolution. The 'IUFD' specifies the 20-lead QFN package, and 'I' indicates the industrial temperature range (-40°C to 85°C).

Replacement Considerations

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