LTC2656CCUFD-L16#TRPBF

Overview

The LTC2656CCUFD-L16#TRPBF is an octal 16-bit rail-to-rail digital-to-analog converter (DAC) family member manufactured by Analog Devices Inc. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C and guarantees monotonicity over the operating temperature range. The device operates on a single supply voltage ranging from 2.7V to 5.5V, providing a full-scale output of 2.5V when using the internal reference. Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. The component includes a power-on reset circuit controllable via the PORSEL pin, allowing outputs to initialize to either zero-scale or mid-scale.

Feature Summary

• Octal configuration with eight independent 16-bit DAC channels
• Precision integrated reference with ±10ppm/°C maximum temperature coefficient
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• Guaranteed monotonic operation across the full temperature range

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and electrical grade. The #TRPBF suffix indicates tape and reel packaging with lead-free finish. Confirm the C-grade designation aligns with the application's linearity requirements, as it specifies a maximum INL error of ±12LSB at 16 bits compared to the B-grade ±4LSB option. Ensure the supply voltage range supports the -L option specifications.

Selection Notes

Select this part for applications requiring multiple low-cost, high-resolution voltage outputs in a compact footprint. The C-grade offers ±12LSB maximum INL, suitable for general-purpose control where extreme precision is not critical. The UFD package provides a 20-lead 4mm × 5mm QFN form factor. Verify that the system power supply remains within the 2.7V to 5.5V range specified for the -L option to ensure proper operation of the internal 2.5V full-scale reference.

Part Context

This component belongs to the LTC2656 family of octal DACs, which also includes variants with different resolutions (12-bit), accuracy grades (B-grade), and full-scale voltages (-H option). The CCUFD-L16 designation specifically identifies the commercial temperature grade, QFN package, -L voltage option, and 16-bit resolution. Other family members like the LTC2656BCUFD-L16 offer tighter linearity specifications but may carry higher costs.

Replacement Considerations

Direct replacements include other LTC2656 variants such as LTC2656BCUFD-L16#TRPBF for improved linearity or LTC2656CUFD-L12#TRPBF for lower resolution needs. Cross-family alternatives like the LTC2655 or LTC2657 offer I2C interfaces instead of SPI. Ensure any substitute maintains the octal channel count and compatible package dimensions if board space is constrained.