LT6604CUFF-15#PBF

Overview

The LT6604CUFF-15#PBF is a dual very low noise, differential amplifier and 15MHz lowpass filter. It integrates two matched, fully differential amplifiers, each with a fourth-order, 15MHz lowpass filter approximating a Chebyshev response. The device operates on 3V, 5V, or ±5V supplies. At unity gain with a 3V supply, it achieves a signal-to-noise ratio of 76dB for a 2V P-P output. Distortion is specified at 86dBc (2nd harmonic) and 90dBc (3rd harmonic) at 1MHz. Gain is resistor-programmable via external resistors.

Feature Summary

• Integrates dual fully differential amplifiers with fourth-order 15MHz lowpass filters
• Provides adjustable output common mode voltage for direct ADC interfacing
• Features guaranteed phase and gain matching between channels
• Resistor-programmable differential gain configuration

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 ordering suffix CUFF indicates the commercial temperature range (0°C to 70°C). Confirm the package type is the 34-lead 4mm x 7mm plastic QFN. Ensure the lead-free finish matches the #PBF designation. Check datasheet notes regarding exposed pad soldering requirements for thermal management.

Selection Notes

Select this component when high channel-to-channel matching is required for differential signal processing. The integrated filter simplifies design by reducing distortion and noise compared to discrete solutions. Consider the 15MHz cutoff frequency against system bandwidth needs. Verify power supply compatibility with available single or dual rail voltages.

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 LT6604-15 specifically targets applications requiring precise amplitude and phase matching in high-speed data acquisition systems.

Replacement Considerations

LT6604IUFF-15#PBF offers the same electrical performance but is guaranteed over the extended industrial temperature range of –40°C to 85°C.