LTC6404IUD-2#PBF

Overview

The LTC6404IUD-2#PBF is a fully differential input/output amplifier and driver optimized for single-supply operation. It features a closed-loop bandwidth extending from DC to 600MHz, an adjustable output common mode voltage, and rail-to-rail output swing. The device includes a built-in 88.5MHz differential lowpass filter with additional filtered outputs. It operates on supply voltages ranging from 2.7V to 5.25V, drawing approximately 29.8mA during active operation. Designed for high precision, it offers low noise and distortion suitable for driving advanced ADCs.

Feature Summary

• Fully differential architecture with both unfiltered and integrated filtered output pairs
• Adjustable output common mode voltage capability for level shifting applications
• Hardware shutdown feature significantly reduces power consumption when inactive
• Input range extends to ground while maintaining full differential signal integrity

Applications

• Differential input to analog-to-digital converter (ADC) drivers
• Single-ended to differential conversion and amplification circuits
• Common mode level translation in signal processing chains
• Low voltage, low noise signal conditioning for precision measurement systems

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free finish and tube packaging configuration. Confirm the 'I' grade designation matches the required industrial temperature range of -40°C to 85°C. Ensure the ordering code corresponds to the gain-stable variant designed for closed-loop gains greater than or equal to 2V/V. Cross-reference the manufacturer's latest discontinuance notifications if applicable.

Selection Notes

Select this component when a fully differential interface is required with integrated filtering capabilities. The IUD-2 variant is specifically characterized for stability at closed-loop gains of 2V/V or higher. Consider the 16-pin QFN package dimensions for PCB layout constraints. Evaluate the supply current requirements against system power budgets, noting the significant reduction available via the shutdown pin.

Part Context

This part belongs to the LTC6404 family of AC precision amplifiers manufactured by Analog Devices. The family includes variants optimized for different closed-loop gains, such as unity-gain stable (-1) and higher gain (-4) configurations. All members share the same compact 3mm x 3mm QFN footprint and core performance characteristics like low noise density and wide bandwidth.

Replacement Considerations

Direct substitutes within the same family include LTC6404CUD-2#PBF for commercial temperature ranges and LTC6404HUD-2#PBF for extended industrial ranges. Verify that any replacement maintains the specific gain-stability requirements for the -2 topology.