LTC2656BCFE-H16#TRPBF

Overview

The LTC2656BCFE-H16#TRPBF is an octal, 16-bit 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 rail-to-rail output buffers guaranteed monotonic over temperature. The device operates on a single 4.5V to 5.5V supply, providing a full-scale output voltage of 4.096V when using the internal reference. Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. This specific part number indicates a B-grade accuracy variant (±4LSB max INL), housed in a 20-lead thermally enhanced TSSOP package, and supplied in tape and reel format.

Feature Summary

• Octal architecture with eight independent 16-bit DAC channels
• Precision integrated reference: 4.096V full-scale output, ±10ppm/°C max drift
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• SPI/MICROWIRE compatible 4-wire serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify that the 'TR' suffix confirms Tape and Reel packaging rather than Tube, as this affects handling and reflow profiles. Confirm the 'H16' designation matches the required 4.096V full-scale range and 4.5V minimum supply voltage for your system design. Ensure the FE package type aligns with your PCB footprint requirements.

Selection Notes

Select this part if your application requires eight synchronized high-precision voltage outputs. The H-option is mandatory for systems needing a 4.096V span; use L-options for 2.5V spans. The B-grade offers tighter linearity (±4LSB) compared to C-grade (±12LSB). Verify power-on reset behavior via the PORSEL pin configuration to ensure safe startup states for connected loads.

Part Context

This component belongs to the LTC2656 family of octal DACs. The 'BCFE' prefix denotes the B-grade accuracy level, Commercial temperature range (0°C to 70°C), and Thermally Enhanced TSSOP package. The '#TRPBF' suffix specifies lead-free construction and Tape & Reel shipping. It shares the same core architecture as tube-packaged variants but differs in delivery method.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2656 variants such as LTC2656BCFE-L16#TRPBF (for 2.5V FSR) or LTC2656CCFE-H16#TRPBF (for lower accuracy). Cross-package alternatives like the QFN version (UFD) require schematic and layout modifications.