LTC6430AIUF-20#PBF

Overview

The LTC6430AIUF-20#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 850mW of DC power. The device features a 20MHz to 2.06GHz bandwidth with a typical gain of 20.8dB. Key performance metrics include a noise figure of 2.9dB at 240MHz, an output third-order intercept point (OIP3) of 47.9dBm at 240MHz, and a P1dB of 24.0dBm. It utilizes a SiGe BiCMOS process and is housed in a 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 wideband balanced amplifier or a high-fidelity CATV amplifier using appropriate baluns.
• Utilizes a high-performance SiGe BiCMOS process for repeatability and includes an exposed pad for thermal management.

Applications

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

Procurement Notes

Verify the specific A-grade designation within the part number, which guarantees minimum OIP3 at 380MHz compared to B-grade variants. Confirm the lead-free finish suffix and tube packaging format against current manufacturer specifications. Ensure compatibility with the required operating temperature range of -40°C to +85°C for the intended application environment.

Selection Notes

Select this component when high linearity and low noise are critical for driving high-resolution analog-to-digital converters in the RF or IF spectrum. The internal 100Ω differential matching simplifies circuit design by reducing external component count. Consider the available A-grade testing for applications requiring guaranteed OIP3 performance at higher frequencies like 380MHz.

Part Context

This device belongs to the LTC6430-20 family of differential gain block amplifiers. It is specifically engineered for ease of use in signal chain applications, offering a fixed gain configuration that minimizes stability issues through a single amplifier stage topology. The family includes related parts such as the single-ended LTC6431-20.

Replacement Considerations

LTC6430BIUF-20#PBF