LT6604IUFF-2.5#PBF

Overview

The LT6604IUFF-2.5#PBF is a dual very low noise differential amplifier and 2.5MHz lowpass filter in a 34-lead QFN package. It integrates two matched channels, each featuring a fourth-order Chebyshev lowpass filter. The device supports 3V, 5V, and ±5V supplies with a maximum total supply voltage of 11V. Gain is resistor-programmable via external resistors, providing unity gain or higher. It specifies an input referred noise of 51 μV RMS and guarantees phase and gain matching between channels.

Feature Summary

• Integrates two fully differential amplifiers with fourth-order lowpass filters
• Provides adjustable output common mode voltage for ADC interfacing
• Features guaranteed channel-to-channel gain and phase matching
• Resistor-programmable differential gain configuration

Applications

• Dual differential ADC driver and filter
• Single-ended to differential converter
• High-speed test and measurement equipment
• Medical imaging systems

Procurement Notes

Verify the specific suffix IUFF-2.5#PBF against the manufacturer's current ordering guide to confirm lead-free finish and temperature grade specifications. Ensure the 34-lead QFN footprint matches the PCB design requirements. Confirm that the -40°C to 85°C industrial temperature range aligns with the system environmental constraints before finalizing procurement.

Selection Notes

Select this component when simultaneous differential amplification and anti-aliasing filtering are required in a compact form factor. The integrated filter reduces component count compared to discrete solutions. Consider the 3V minimum supply requirement and the need for external gain-setting resistors. Evaluate the 51 μV RMS noise specification against the system signal-to-noise ratio requirements.

Part Context

This part belongs to the LT6604 family of dual differential amplifiers with integrated lowpass filters. Variants exist with different cutoff frequencies ranging from 2.5MHz to 20MHz. The I-grade designation indicates an extended industrial temperature range compared to the C-grade commercial variant. All variants share the same 34-lead QFN package and pinout architecture.

Replacement Considerations

LT6604CUFF-2.5#PBF offers identical electrical performance within the 0°C to 70°C commercial temperature range.