LTC6430BIUF-15#PBF

Overview

The LTC6430BIUF-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 with a total power consumption of 800mW. The device provides a typical gain of 15.2dB across a bandwidth from 20MHz to 2000MHz. Key electrical characteristics include a noise figure of 3.0dB at 240MHz, an output third-order intercept point (OIP3) of 47.0dBm at 240MHz, and an output 1dB compression point (P1dB) of 24.1dBm. It features internally matched 100Ω differential input and output impedances.

Feature Summary

• 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 using 1:2 baluns or a 75Ω CATV amplifier using 1:1.33 baluns.
• Constructed using 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 B-grade designation in the part number, which indicates the component lacks the guaranteed minimum OIP3 specification at 240MHz found in A-grade variants. Confirm the package type is the 24-lead 4mm x 4mm QFN with an exposed thermal pad. Ensure the operating temperature range meets the requirement of -40°C to +85°C for your specific application environment before finalizing procurement.

Selection Notes

Select this component when a fixed-gain differential amplifier is required for signal chains operating between 20MHz and 2GHz. It is suitable for applications needing direct drive to differential ADC inputs without external matching networks. Consider the B-grade status if strict OIP3 guarantees are not critical for the system design. Evaluate the need for external baluns if interfacing with single-ended 50Ω sources or loads.

Part Context

This device belongs to the LTC6430-15 family of high linearity differential amplifiers. It is functionally similar to the LTC6431-15 but offers differential operation rather than single-ended. The BIUF suffix denotes the B-grade performance level and the specific QFN packaging configuration used for surface mount assembly.

Replacement Considerations

LTC6430AIUF-15#PBF