LTC2656BIUFD-L16#PBF

Overview

The LTC2656BIUFD-L16#PBF 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 2.7V to 5.5V supply, providing a full-scale output of 2.5V with the internal reference. 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 ±4LSB 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 16-bit resolution with rail-to-rail voltage outputs and built-in high-performance buffers
• Precise integrated reference with a maximum temperature coefficient of 10ppm/°C
• Maximum INL error of ±4LSB at 16 bits, guaranteed monotonic over temperature
• SPI/MICROWIRE compatible 4-wire serial interface with clock rates up to 50MHz

Applications

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

Procurement Notes

Verify that the component matches the specified 20-lead QFN package and industrial temperature grade (-40°C to 85°C). Confirm the presence of the lead-free finish designation (#PBF) and ensure the part number suffix corresponds to the specific B-grade accuracy level required for the application.

Selection Notes

Select this part when eight independent 16-bit channels are required in a compact footprint. The -L option provides a 2.5V full-scale output suitable for 2.7V to 5.5V supplies. Ensure the design accommodates the 4mm x 5mm QFN package dimensions and thermal requirements, as the exposed pad must be soldered to the PCB ground plane.

Part Context

This component belongs to the LTC2656 family of octal DACs, which also includes 12-bit variants and alternative packages such as the thermally enhanced TSSOP. The BIUFD-L16 designation specifically identifies the industrial temperature grade, QFN package, 16-bit resolution, and 2.5V full-scale voltage configuration within this product line.

Replacement Considerations

Compatible substitutes within the same family include the LTC2656BCUFD-L16#PBF for commercial temperature applications or the LTC2656BIUFD-H16#PBF for 4.096V full-scale output requirements. Verify pin compatibility and thermal characteristics when transitioning between package types.