LTC2656CUFD-H12#TRPBF

Overview

The LTC2656CUFD-H12#TRPBF is an octal, 12-bit rail-to-rail digital-to-analog converter (DAC) in a 20-lead QFN package. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and includes high-performance output buffers guaranteed monotonic over temperature. Communication is handled via a 50MHz SPI/MICROWIRE compatible interface. Key specifications include ±1 LSB integral nonlinearity error, ultralow DAC-to-DAC crosstalk (<1nV•s), and power-on reset options for zero-scale or mid-scale initialization.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail voltage outputs
• Integrated 4.096V precision reference with 10ppm/°C max drift
• SPI/MICROWIRE compatible serial interface supporting up to 50MHz clock rates
• Ultralow crosstalk between channels (<1nV•s) and guaranteed monotonicity

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing components. Confirm that the H-grade designation aligns with the required 4.5V to 5.5V supply range for your application design. Ensure the CUFD package type matches your PCB footprint requirements.

Selection Notes

Select this part for applications requiring multiple synchronized analog outputs with high linearity. The H-option is necessary if a 4.096V full-scale range is required; otherwise, consider L-options for lower voltage supplies. Verify that the commercial temperature grade (0°C to 70°C) meets your environmental constraints.

Part Context

This component belongs to the LTC2656 family of octal DACs. It shares architectural similarities with other members like the LTC2656IUFD-L12 but differs in resolution, reference voltage, and operating temperature range. The CUFD suffix indicates the 4mm x 5mm QFN package variant.

Replacement Considerations

Direct replacements within the same family include LTC2656IUFD-H12#TRPBF for industrial temperature range (-40°C to 85°C). For 16-bit resolution, consider LTC2656BCUFD-H16#TRPBF. Ensure pin compatibility and thermal performance are validated when substituting.