LTC6430BIUF-20#TRPBF

Overview

The LTC6430BIUF-20#TRPBF is a high linearity differential RF/IF amplifier and ADC driver manufactured by Analog Devices Inc. It operates from a single 5V supply, consuming 850mW of DC power. The device features a 20.8dB gain and a -3dB bandwidth extending from 20MHz to 2060MHz. Key performance metrics include a noise figure of 2.9dB at 240MHz, an output third-order intercept point (OIP3) of 47.0dBm at 240MHz for the B-grade, and a P1dB of 23.9dBm. It utilizes a SiGe BiCMOS process 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 linearity 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 or a 75Ω CATV amplifier using appropriate baluns.
• Utilizes a high-performance SiGe BiCMOS process for repeatability and low associated output noise.

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm that the B-grade designation does not guarantee OIP3 testing at 380MHz, unlike the A-grade variant. Ensure compatibility with the 4mm x 4mm QFN footprint and exposed pad thermal requirements during procurement planning.

Selection Notes

Select this component for applications requiring fixed-gain differential amplification up to 2GHz. The B-grade offers standard linearity specifications without guaranteed OIP3 testing at 380MHz. Consider the internal 100Ω matching if external impedance transformation networks are undesirable. Evaluate thermal management needs due to the 850mW power consumption within the compact QFN package.

Part Context

This part belongs to the LTC6430-YY series of differential gain block amplifiers. It is functionally related to the single-ended LTC6431-20. The device is available in A-grade and B-grade variants, distinguished primarily by OIP3 testing guarantees at 380MHz. It is designed for ease of use with minimal support components required.

Replacement Considerations

LTC6430AIUF-20#TRPBF

FAQ

What is the difference between the A-grade and B-grade versions of the LTC6430-20?

The A-grade devices are tested and guaranteed for OIP3 at 380MHz, whereas the B-grade devices do not have this specific guarantee.

How is the device internally biased?

The input pins (+IN and -IN) have an internally generated 1.8V DC bias, requiring DC-blocking capacitors for AC coupling.