LTC2656BIUFD-L16#TRPBF

Overview

The LTC2656BIUFD-L16#TRPBF is an octal 16-bit rail-to-rail digital-to-analog converter in a 20-lead 4mm × 5mm QFN package. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V. Key electrical specifications include a maximum integral nonlinearity error of ±4LSB at 16 bits and guaranteed monotonicity over the operating temperature range. Communication is handled via a 4-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz.

Feature Summary

• Octal 16-bit resolution with ±4LSB maximum INL error
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• Power-on reset configurable to zero-scale or mid-scale via PORSEL pin

Applications

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

Procurement Notes

Verify the ordering suffix #TRPBF confirms tape and reel packaging. Confirm the 'I' grade indicates industrial temperature range (-40°C to 85°C). Ensure the 'L' suffix matches the required 2.7V to 5.5V supply operation and 2.5V internal reference mode. Check that the UFD package designation corresponds to the 20-lead 4mm × 5mm QFN form factor.

Selection Notes

Select this part for applications requiring eight independent 16-bit channels with high accuracy. The -L variant is suitable for systems powered by 2.7V to 5.5V supplies where a 2.5V output span is desired. Choose the -H variant if a 4.096V output span is needed, noting it requires a 4.5V to 5.5V supply. The B grade ensures tighter linearity specifications compared to the C grade.

Part Context

This component belongs to the LTC2656 family of octal DACs. Variants differ by resolution (12-bit vs 16-bit), accuracy grade (B vs C), internal reference voltage (L=2.5V vs H=4.096V), and package type (QFN vs TSSOP). The BIUFD-L16 designation specifically identifies the industrial grade, B-grade accuracy, QFN package, L-reference option, and 16-bit resolution.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Verify compatibility with existing designs when considering alternative octal DACs.