LTC2656CIUFD-L16#PBF

Overview

The LTC2656CIUFD-L16#PBF is an octal 16-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices Inc. It features a precision integrated reference with a maximum temperature coefficient of 10ppm/°C and operates within a supply voltage range of 2.7V to 5.5V. The device provides eight independent channels with built-in high-performance output buffers, ensuring monotonicity 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 maximum integral nonlinearity (INL) error of ±12 LSBs at 16 bits, a settling time of 8.9µs for full-scale transitions, and ultralow crosstalk between DAC channels.

Feature Summary

• Octal 16-bit resolution with rail-to-rail output buffers
• Precision integrated reference with 10ppm/°C max temperature coefficient
• Maximum INL error of ±12 LSBs at 16-bit resolution
• SPI/MICROWIRE compatible 4-wire serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm package type, temperature grade, and lead finish. Ensure compatibility with system requirements regarding supply voltage ranges and reference configurations before procurement.

Selection Notes

Select this component for applications requiring multiple high-resolution voltage outputs in a compact form factor. Consider the ±12 LSB INL specification for accuracy requirements. Verify that the 2.7V to 5.5V supply range aligns with the system power architecture and that the QFN package thermal characteristics are suitable for the intended environment.

Part Context

This part belongs to the LTC2656 family of octal DACs, which also includes variants with different resolutions (12-bit), accuracy grades (±4 LSB INL), and full-scale voltage options (2.5V or 4.096V). The 'C' indicates the commercial temperature range (0°C to 70°C), while 'I' denotes the industrial range (-40°C to 85°C). The 'UFD' suffix specifies the 20-lead 4mm × 5mm plastic QFN package.

Replacement Considerations

Direct replacements within the same family include the LTC2656BIUFD-L16#PBF for higher accuracy (±4 LSB INL) or the LTC2656CUFD-L12#PBF for lower resolution. Cross-family alternatives like the LTC2657 series offer I2C interfaces instead of SPI.