LTC2657BCUFD-L16#PBF

Overview

The LTC2657BCUFD-L16#PBF is an octal, 16-bit digital-to-analog converter featuring integrated rail-to-rail output buffers and a precision reference with a maximum temperature coefficient of 10ppm/°C. It operates on a single supply voltage ranging from 2.7V to 5.5V, delivering a full-scale output of 2.5V when using the internal reference. The device utilizes a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±4LSB, guaranteed monotonicity over temperature, and ultralow crosstalk between channels.

Feature Summary

• Octal architecture with 16-bit resolution and integrated 10ppm/°C max reference
• Rail-to-rail buffered outputs with selectable internal or external reference
• I²C serial interface supporting 400kHz clock rates
• Power-on reset circuit configurable for zero-scale or mid-scale initialization

Applications

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

Procurement Notes

Verify the component authenticity by checking the manufacturer marking '57L16' against the datasheet documentation. Confirm the package type corresponds to the 20-lead 4mm × 5mm plastic QFN (UFD) configuration. Ensure the operating temperature range matches the C-grade specification of 0°C to 70°C for this specific part number variant.

Selection Notes

Select the LTC2657BCUFD-L16#PBF when eight independent voltage outputs are required in a compact form factor. The L-option provides a 2.5V full-scale range suitable for 2.7V to 5.5V supply systems. Choose this B-grade version if the application demands a maximum INL error of ±4LSB. Consider the H-option if a 4.096V output span is necessary, noting it requires a higher minimum supply voltage.

Part Context

This component belongs to the LTC2657 family of octal DACs, which also includes 12-bit variants and industrial temperature grade options. The BC suffix indicates the commercial temperature range (0°C to 70°C) and the B-grade accuracy level. The UFD designation specifies the 20-lead QFN package, while the L16 suffix confirms the 16-bit resolution and 2.5V internal reference configuration.

Replacement Considerations

Direct replacements within the same family include the LTC2657BIUFD-L16#PBF for industrial temperature operation (-40°C to 85°C). For tape and reel packaging instead of tube, use the LTC2657BCUFD-L16#TRPBF variant. Other resolutions like the 12-bit LTC2657CUFD-L12#PBF offer tighter linearity but fewer bits.