LTC2656IFE-L12#PBF

Overview

The LTC2656IFE-L12#PBF is an octal 12-bit digital-to-analog converter (DAC) from Analog Devices, housed in a 20-lead thermally enhanced TSSOP package. It features rail-to-rail output buffers and a precision integrated reference with a maximum temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 2.7V to 5.5V, providing a full-scale output of 2.5V. Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity error of ±1 LSB, guaranteed monotonicity over the operating temperature range, and ultralow crosstalk between channels.

Feature Summary

• Octal 12-bit resolution with rail-to-rail output buffers
• Integrated precision reference with 10ppm/°C max temperature coefficient
• Single 2.7V to 5.5V supply operation with 2.5V full-scale output
• SPI/MICROWIRE compatible 4-wire serial interface with 50MHz clock rate
• Guaranteed monotonicity and ultralow DAC-to-DAC crosstalk (<1nV•s)

Applications

• Mobile communications systems
• Process control and industrial automation
• Instrumentation equipment
• Automatic test equipment
• Automotive applications

Procurement Notes

Verify the specific suffix 'IFE' corresponds to the Industrial temperature grade (-40°C to 85°C) and the 'L12' designation for the 2.5V full-scale 12-bit variant. Confirm the '#PBF' indicates lead-free construction. Ensure the 20-lead Thermally Enhanced TSSOP package matches the PCB footprint requirements, noting the exposed pad must be soldered to ground for proper thermal management and electrical connection.

Selection Notes

Select this component when eight independent analog outputs are required within a compact form factor. The -L option is suitable for systems powered by a single 2.7V to 5.5V rail requiring a 2.5V output swing. If higher resolution or a 4.096V output range is needed, consider the -H or 16-bit variants. Verify that the 50MHz serial interface speed meets the system's data throughput requirements and that the power-on reset configuration aligns with the application's startup state needs.

Part Context

This part belongs to the LTC2656 family of octal DACs, which also includes 16-bit versions and packages such as the 20-lead QFN. The IFE suffix specifically denotes the Industrial temperature range and TSSOP packaging, distinguishing it from Commercial grade parts or alternative package types within the same functional family.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2656 variants with different resolutions or package styles, provided the electrical parameters like supply voltage and output span match the design requirements.