آر اف (فرکانس رادیویی) و بی‌سیم تضعیف‌کننده‌

Product Attributes

Introduction

The MAX19790 dual, general-purpose analog voltage variable attenuator (VVA) is designed to interface with 50I systems operating in the 250MHz to 4000MHz frequency range. Each attenuator includes a control circuit that provides 22dB of attenuation range with a linear control slope of 10dB/V. Both attenuators share a common analog control and can be cascaded together to yield 44dB of total dynamic range, with a combined linear control slope of 20dB/V. The IC is a monolithic device designed on one of Maxim’s proprietary SiGe BiCMOS processes. The device operates from a single +5.0V supply and is available in a compact, 36-pin thin QFN package (6mm×6mm×0.8mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

Features

• 250MHz to 4000MHz RF Frequency Range
• Integrates Two Analog Attenuators in One Monolithic Device
• Flexible Attenuation-Control Ranges 22dB (per Attenuator) 44dB (Both Attenuators Cascaded)
• 2.4dB 1500MHz Insertion Loss (per Attenuator)
• Linear dB/V Analog Control Response Curve Simplifies Automatic Leveling Control and Gain-Trim Algorithms
• Excellent Attenuation Flatness Over Wide Frequency Ranges and Attenuation Settings
• Low 7.3mA Supply Current
• Single +5.0V Supply Voltage

Applications

• Broadband System Applications
• Wireless Infrastructure Digital and Spread Spectrum Communication Systems
• WCDMA/LTE, TD - SCDMA/TD - LTE, WiMAX, cdma2000, GSM/EDGE, and MMDS Base Stations
• VSAT/Satellite Modems
• Microwave Terrestrial Links
• Lineup Gain Trim
• Temperature Compensation Circuits
• Automatic Level Control (ALC)
• Transmitter Gain Control
• Receiver Gain Control
• General Test Equipment