LTC2656CFE-H12#TRPBF

Overview

The LTC2656CFE-H12#TRPBF is an octal 12-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, providing a full-scale output voltage of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes built-in high-performance output buffers guaranteed monotonic over the operating temperature range. Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a typical settling time of 4.6µs for 12-bit accuracy, ±1 LSB maximum integral nonlinearity (INL), and ultralow DAC-to-DAC crosstalk below 1nV•s.

Feature Summary

• Octal architecture with eight independent 12-bit voltage output channels in a single package
• Integrated precision reference yielding 4.096V full-scale output with ±10ppm/°C max temperature coefficient
• Rail-to-rail output buffers with guaranteed monotonicity and <1nV•s inter-channel crosstalk
• SPI/MICROWIRE compatible 4-wire serial interface with 50MHz clock capability

Applications

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

Procurement Notes

Verify that the specific ordering suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the CFE package designation matches the 20-lead thermally enhanced TSSOP footprint requirements for the target PCB layout. Ensure the H-grade internal reference specification aligns with the system's 4.5V to 5.5V power supply constraints.

Selection Notes

Select this component when eight isolated 12-bit voltage outputs are required within a compact form factor. The H-option internal reference provides a 4.096V span suitable for systems requiring higher dynamic range than the 2.5V L-option. Verify that the 4.5V minimum supply voltage meets the design's power budget, as lower voltage operation is not supported for this specific grade. Consider the thermal performance of the TSSOP package if high channel density heat dissipation is a concern.

Part Context

This part belongs to the LTC2656 family of octal DACs, which also includes variants with different resolutions (16-bit), reference voltages (2.5V or 4.096V), and packages (QFN). The CFE suffix indicates the commercial temperature grade (0°C to 70°C) and the 20-lead thermally enhanced TSSOP housing. The TRPBF suffix denotes tape and reel packaging with lead-free finish, distinguishing it from tube-packaged equivalents like the #PBF variant.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2656 variants such as LTC2656CUFD-L12#TRPBF (QFN package, 2.5V ref) or LTC2656BCFE-H12#TRPBF (higher accuracy grade). Cross-family replacements like the LTC2655 require I2C interface adaptation.