آر اف (فرکانس رادیویی) و بی‌سیم تقویت‌کننده‌ آر اف

Product Attributes

Introduction

The MAX3537/MAX3538 broadband RF variable-gain amplifiers (VGA) are designed for digital and OpenCable set-tops and televisions. These devices feature a unique design that integrates a dual-band (UHF and VHF) input and a low-noise, variable-gain amplifier. The integrated RF VGA covers a 10MHz to 1GHz input frequency range and provides 22dB of gain-control range. The MAX3538 is intended for the most difficult signal conditions where performance is critical. The external pullup inductor improves IIP2 and IIP3 while also increasing gain for better sensitivity. The MAX3537 does not need an external pullup inductor and is ideal for low-power applications with less demanding receiver distortion requirements such as smaller TVs using indoor antennas. The MAX3537/MAX3538 variable-gain amplifiers are designed for US digital television applications, specifically to meet ATSC’s recommended receiver requirements. The MAX3538 uses an external pullup inductor for maximum linearity and gain and is ideal for performance-driven applications. The MAX3537 does not require an external pullup inductor and requires 10mA less current than the MAX3538. This results in slightly lower linearity and gain but is an acceptable option for cost- and

Features

• Low-Noise VGA Eliminates PIN Attenuator
• 22dB Gain-Control Range
• Low Noise Figure: 5dB at Maximum Gain Setting
• High Linearity: +19dBm IIP3 (MAX3538) at Maximum Gain Setting
• Low Power Consumption: <200mW (MAX3537)
• Available in a 4mm x 4mm, 12-Pin Thin QFN Package

Applications

• OpenCable Set-Top Boxes and Televisions
• Digital Set-Top Boxes
• Media Gateways
• Digital Terrestrial Receivers
• TV IF Strips