LTC2656BCUFD-L16#PBF

Overview

The LTC2656BCUFD-L16#PBF is an octal, 16-bit rail-to-rail digital-to-analog converter (DAC) family member from Analog Devices. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C and built-in high-performance output buffers guaranteed monotonic over temperature. The device operates on a single 2.7V to 5.5V supply and communicates via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. It incorporates a power-on reset circuit controllable by the PORSEL pin for zero-scale or mid-scale initialization.

Feature Summary

• Octal architecture providing eight independent 16-bit DAC channels in a single package
• Precision integrated reference with ±10ppm/°C maximum temperature coefficient
• Maximum Integral Nonlinearity (INL) error of ±4LSB at 16 bits
• Ultralow crosstalk between DACs (<1nV•s) and rail-to-rail output capability

Applications

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

Procurement Notes

Verify the specific suffix 'L16' indicates the 2.5V full-scale internal reference configuration. Confirm the 'BCUFD' designation corresponds to the commercial temperature grade (0°C to 70°C), ±4LSB INL accuracy, and 20-lead QFN package. Ensure the '#PBF' suffix denotes lead-free construction as specified in the ordering information table.

Selection Notes

Select this component when eight isolated 16-bit voltage outputs are required within a compact footprint. The L16 variant is appropriate for systems requiring a 2.5V full-scale range powered by a 2.7V to 5.5V supply. Consider the H16 variant if a 4.096V full-scale output is needed, which requires a 4.5V to 5.5V supply range. Verify that the 50MHz SPI interface speed meets system timing requirements.

Part Context

This part belongs to the LTC2656 family of octal DACs, which also includes variants with different resolutions (12-bit), accuracies (±12LSB), and reference voltages (2.5V or 4.096V). The BC prefix distinguishes it from the C-grade parts by offering tighter linearity specifications (±4LSB vs ±12LSB). The UFD package identifies the 4mm × 5mm plastic QFN form factor with an exposed thermal pad.

Replacement Considerations

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