LT6604IUFF-10#PBF

Overview

The LT6604IUFF-10#PBF is a dual very low noise differential amplifier and 10MHz lowpass filter. It integrates two matched channels, each featuring a fourth-order Chebyshev response filter. The device supports 3V, 5V, and ±5V supplies with an operating temperature range of –40°C to 85°C. Key electrical parameters include a gain bandwidth product of 10MHz, common mode rejection ratio of 61dB, input bias current of 40µA, and power supply current of 35mA per channel at 3V. It utilizes a 34-lead QFN package.

Feature Summary

• Integrates two fully differential amplifiers with fourth-order lowpass filters approximating a Chebyshev response
• Provides guaranteed phase and gain matching between channels for precision signal processing
• Features resistor-programmable differential gain and adjustable output common mode voltage
• Designed for high-speed ADC interfacing with low distortion and exceptional signal-to-noise performance

Applications

• Dual differential ADC driver plus filter
• Single-ended to differential converter
• Matched dual differential filter stage
• Common mode translation of differential signals
• High speed test and measurement equipment

Procurement Notes

Verify the IUFF suffix indicates the industrial temperature grade (–40°C to 85°C) and QFN package. Confirm the #PBF designation ensures lead-free compliance. Cross-reference the specific part number against official Analog Devices documentation to ensure compatibility with system requirements before procurement.

Selection Notes

Select this component when dual-channel differential filtering with integrated amplification is required. Ensure the 10MHz cutoff frequency aligns with the application bandwidth. Verify that the 3V minimum supply voltage meets system constraints. Consider the QFN package size for PCB layout limitations and thermal management requirements.

Part Context

This part belongs to the LT6604 family of dual differential amplifiers with integrated lowpass filters. The 'I' suffix denotes the industrial temperature range variant, while 'UFF' specifies the 34-lead plastic QFN package. The '#PBF' indicates a lead-free finish. It is designed for applications requiring precise amplitude and phase matching between channels.

Replacement Considerations

LT6604CUFF-10#PBF: Commercial temperature grade (0°C to 70°C).

FAQ

How is the differential gain programmed?

The DC gain from differential inputs to outputs is set by two external resistors using the formula 402Ω/RIN.

What is the function of the VMID pin?

The VMID pin sets the output common mode voltage of the first filter stage and is internally biased at mid-supply.

Can the output common mode voltage be adjusted?

Yes, the VOCM pin allows adjustment of the output common mode voltage for the second filter stage.