LTC2656CIUFD-L16#TRPBF

Overview

The LTC2656CIUFD-L16#TRPBF is an octal, 16-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices Inc. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C and operates within a supply voltage range of 2.7V to 5.5V. The device provides eight independent voltage outputs with built-in high-performance buffers guaranteed monotonic over temperature. It communicates via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±12LSB at 16 bits, a settling time of 8.9µs for 16-bit accuracy, and ultralow DAC-to-DAC crosstalk below 1nV•s.

Feature Summary

• Octal architecture with 16-bit resolution and rail-to-rail output capability
• Precision integrated reference with 10ppm/°C max temperature coefficient
• Maximum INL error of ±12LSB at 16 bits
• SPI/MICROWIRE compatible 4-wire serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify the C-grade commercial temperature rating (0°C to 70°C) and I-grade industrial availability if operating outside this range. Confirm the UFD package type (20-Lead 4mm × 5mm Plastic QFN) matches PCB footprint requirements. Ensure the TRPBF suffix indicates tape and reel packaging with lead-free finish. Check datasheet notes regarding power-on reset configurations and external reference usage if applicable.

Selection Notes

Select the -L option for a 2.5V full-scale output with a 2.7V to 5.5V supply range, or the -H option for a 4.096V full-scale output requiring a 4.5V to 5.5V supply. Choose the B-grade variant if a tighter maximum INL of ±4LSB is required instead of the C-grade's ±12LSB. Consider the FE package (TSSOP) if QFN soldering is not feasible. Verify that the internal reference mode meets noise and stability requirements or plan for external reference integration via the REFIN/OUT pin.

Part Context

This component belongs to the LTC2656 family of octal DACs, which also includes 12-bit variants (LTC2656-12) and different accuracy grades (B-grade). The CIUFD designation specifically identifies the Commercial temperature grade, UFD QFN package, and 16-bit resolution. It shares the same block diagram and interface logic as other LTC2656 members but differs in linearity specs and supply voltage constraints based on the L or H suffix.

Replacement Considerations

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