LTC6430AIUF-15#PBF

Overview

The LTC6430AIUF-15#PBF is a high linearity differential RF/IF amplifier and ADC driver manufactured by Analog Devices Inc. It operates from a single 5V supply, consuming 800mW of DC power. The device provides a typical gain of 15.2dB with a bandwidth extending to 2000MHz. Key electrical characteristics include a noise figure of 3.0dB at 240MHz and an output third-order intercept point (OIP3) of 50.0dBm at the same frequency for the A-grade variant. It features internally matched 100Ω differential impedance and is housed in a 4mm x 4mm 24-lead QFN package.

Feature Summary

• High linearity differential architecture designed for driving high-resolution, high-speed ADCs with excellent performance beyond 1000MHz.
• Internally matched to 100Ω differential source and load impedance with on-chip bias and temperature compensation.
• Capable of functioning as a 50Ω wideband balanced amplifier using 1:2 baluns or a 75Ω CATV amplifier using 1:1.33 baluns.
• Constructed using a high-performance SiGe BiCMOS process for superior repeatability compared to similar GaAs amplifiers.

Applications

• Differential ADC Driver
• Differential IF Amplifier
• OFDM Signal Chain Amplifier
• 50Ω Balanced IF Amplifier
• 75Ω CATV Amplifier

Procurement Notes

Verify the specific ordering suffix to confirm the packaging format, as the A-grade is available in both tube and tape-and-reel configurations. Ensure the component grade matches design requirements, as only the A-grade guarantees OIP3 testing at 240MHz. Confirm that the 24-lead QFN package footprint aligns with the PCB layout constraints and thermal management strategy.

Selection Notes

Select this component when a fixed-gain differential amplifier is required for wideband signal processing up to 2GHz. The A-grade selection is mandatory if guaranteed OIP3 performance at 240MHz is critical for the system's linearity budget. Consider the internal 100Ω matching to simplify external circuitry, but ensure appropriate DC-blocking capacitors and RF chokes are included for the specific operating frequency band.

Part Context

This part belongs to the LTC6430-15 series of high linearity differential amplifiers. It is distinct from the B-grade variant which lacks guaranteed OIP3 testing. Related components include the LTC6431-15 for single-ended applications and other members of the LTC643X family offering different gain levels or frequency ranges.

Replacement Considerations

LTC6430BIUF-15#PBF

FAQ

What is the difference between the A-grade and B-grade versions of the LTC6430-15?

The A-grade version guarantees a minimum Output Third-Order Intercept Point (OIP3) at 240MHz, whereas the B-grade does not have this specific guarantee.

Can the LTC6430-15 be used as a single-ended amplifier?

Yes, by using 1:2 baluns at the input and output, it can function as a 50Ω wideband balanced amplifier. With 1:1.33 baluns, it can serve as a 75Ω CATV amplifier.