LT6402CUD-6#PBF

Overview

The LT6402CUD-6#PBF is a low distortion, low noise differential amplifier and ADC driver designed for applications from DC to 300MHz. It features a fixed gain of 6dB (2V/V) and operates on a single 5V supply with a typical current consumption of 30mA. The device includes both unfiltered outputs (+OUT, –OUT) and built-in filtered outputs (+OUTFILTERED, –OUTFILTERED) providing a 75MHz differential low-pass filter response. It utilizes a compact 16-lead 3mm × 3mm QFN package and supports an operating temperature range of –40°C to 85°C.

Feature Summary

• Integrated 75MHz differential low-pass filter on dedicated output pins to reduce external filtering requirements.
• Adjustable output common mode voltage via the VOCM pin, eliminating the need for output transformers or AC-coupling capacitors in many configurations.
• Capable of single-ended to differential conversion and differential to single-ended conversion with minimal performance degradation.
• Designed for direct interfacing with high-speed 12-bit and 14-bit ADCs using minimal support circuitry.

Applications

• Differential ADC driver for imaging and communications systems
• IF sampling receivers and SAW filter interfacing/buffering
• General-purpose differential gain block requiring DC to 300MHz operation
• Level shifting and signal conditioning in data acquisition systems

Procurement Notes

Verify that the specific suffix #PBF corresponds to the lead-free finish and tape-and-reel packaging option as listed in the manufacturer's ordering information. Confirm the 'C' grade designation meets the required thermal specifications for your application environment, noting it is guaranteed from 0°C to 70°C but characterized over the wider –40°C to 85°C range. Ensure power supply bypassing adheres to datasheet recommendations to maintain stability.

Selection Notes

Select this component when driving high-resolution ADCs requires low input-referred noise and high linearity across a wide bandwidth. The fixed 6dB gain simplifies system design by removing external gain-setting resistors. Consider the filtered outputs if anti-aliasing filtering is needed without adding discrete components. Ensure the input source impedance matches the internal 200Ω differential input impedance or use appropriate termination networks for 50Ω sources.

Part Context

This part belongs to the LT6402 family of differential amplifiers, specifically configured with a fixed 6dB gain. The 'C' grade indicates commercial temperature performance guarantees, while the 'UD' suffix denotes the 16-lead plastic QFN package. The '#PBF' suffix identifies the lead-free RoHS-compliant version available in tape-and-reel format, distinguishing it from the bulk tube options or leaded variants.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. Consult Linear Technology marketing for parts specified with wider operating temperature ranges or alternative package styles within the same family.