LTC2657BCFE-L16#PBF

Overview

The LTC2657BCFE-L16#PBF is an octal, 16-bit digital-to-analog converter featuring a 2-wire I²C interface. It integrates a precision reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single 2.7V to 5.5V supply and includes high-performance rail-to-rail output buffers guaranteed monotonic over temperature. Key electrical specifications include a maximum integral nonlinearity (INL) of ±4 LSB, a settling time of 9.1 µs for 16-bit accuracy, and a typical supply current of 3.1 mA. It is housed in a 20-lead thermally enhanced TSSOP package.

Feature Summary

• Octal architecture with 8 independent 16-bit DAC channels
• Integrated precision reference yielding 2.5V full-scale output
• Maximum INL error of ±4 LSB and guaranteed monotonicity
• I²C compatible serial interface supporting up to 400kHz clock rates

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type and temperature grade. The '#PBF' designation indicates a lead-free finish. Confirm that the required operating temperature range aligns with the 'C' grade specification (0°C to 70°C). Ensure the design supports the 2.7V to 5.5V supply voltage constraints for the -L option.

Selection Notes

Select this component when multiple isolated analog outputs are required within a compact footprint. The integrated reference simplifies board layout by eliminating external reference components. Choose the -L variant for lower voltage supplies (2.7V–5.5V) and 2.5V output span. Consider the -H variant if a 4.096V output span is necessary, requiring a 4.5V minimum supply. Verify I²C address configuration via CA pins if multiple devices share the bus.

Part Context

This part belongs to the LTC2657 family of octal DACs, which also includes 12-bit variants and packages such as QFN. The 'B' grade specifies the ±4 LSB INL performance level, distinguishing it from standard grades. The FE package denotes the 20-lead thermally enhanced TSSOP form factor, offering improved thermal dissipation compared to standard plastic packages.

Replacement Considerations

Direct replacements within the same family include LTC2657BCFE-L16#TRPBF (tape and reel version) or other temperature grades like LTC2657BIFE-L16#PBF for industrial ranges. Cross-family substitutes require verification of pin compatibility and electrical parameter alignment.