LTC2655BIUF-L16#PBF

Overview

The LTC2655BIUF-L16#PBF is a quad, 16-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output voltage of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and utilizes a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Each channel includes high-performance, rail-to-rail output buffers that are guaranteed monotonic over the operating temperature range. The part is housed in a 20-lead 4mm × 4mm plastic QFN package.

Feature Summary

• Quad 16-bit resolution with ±4LSB maximum Integral Nonlinearity (INL)
• Integrated 10ppm/°C max precision reference yielding 2.5V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over temperature
• I²C interface with selectable power-on reset to zero-scale or mid-scale

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates tube packaging rather than tape and reel. Confirm the 'I' temperature grade corresponds to the –40°C to 85°C industrial range and the 'B' electrical grade specifies the ±4LSB INL performance. Ensure the 'L' suffix denotes the 2.5V internal reference configuration suitable for 2.7V to 5.5V supply operation.

Selection Notes

Select this component when four independent 16-bit DAC channels are required in a compact footprint. The integrated 2.5V reference simplifies design by eliminating external reference components. Choose this part over the -H variant if the system supply voltage may drop below 4.5V, as the -L option supports operation down to 2.7V. Verify that the I²C address pins (CA0-CA2) can be configured to avoid bus conflicts in multi-device systems.

Part Context

This part belongs to the LTC2655 family of quad DACs, which also offers 12-bit resolution variants and different full-scale voltage options. The BIUF-L16 designation specifically identifies the Industrial temperature grade, B-grade accuracy, QFN package, and 16-bit resolution with 2.5V reference. Other family members include the LTC2655BCUF-L16 for commercial temperatures and LTC2655BIUF-H16 for 4.096V outputs requiring higher supply voltages.

Replacement Considerations

Direct pin-compatible replacements within the same package include the LTC2655BCUF-L16#PBF for commercial temperature applications. For higher accuracy requirements, the LTC2655BIUF-H16#PBF provides 4.096V output but requires a minimum 4.5V supply. Cross-model substitution with other Analog Devices quad DACs may require schematic modifications due to differing pinouts or interface protocols.