LTC6430BIUF-20

Overview

The LTC6430BIUF-20 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 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 ordering suffix to confirm the component grade. The B-grade designation indicates that the device does not guarantee OIP3 testing at 380MHz, unlike the A-grade variant. Ensure the procurement documentation explicitly states the B-grade status to align with design requirements regarding linearity specifications at higher frequencies.

Selection Notes

Select this component when a fixed-gain differential amplifier is required for signal chains operating between 20MHz and 2060MHz. It is suitable for applications needing low noise and high linearity without external matching networks due to internal 100Ω differential matching. Consider the B-grade limitations if strict OIP3 guarantees at 380MHz are necessary for the system.

Part Context

This part belongs to the LTC6430-YY series of differential gain block amplifiers. The '20' suffix denotes the specific gain and frequency characteristics of this model. It is distinct from the single-ended LTC6431-20. The B-grade version offers standard performance without the guaranteed OIP3 test at 380MHz provided by the A-grade counterpart.

Replacement Considerations

LTC6430AIUF-20#PBF