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MAX19790：250MHz to 4000MHz Dual, Analog Voltage Variable Attenuator

High-Performance RF VVA Features 44dB of Linearly Controlled Dynamic Range and Excellent Attenuation Flatness

The MAX19790 is a dual, general-purpose analog voltage variable attenuator (VVA) designed to interface with 50Ω 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 x 6mm x 0.8mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

Key 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

MAX19790: Typical Application Circuit Applications/Uses Automatic Level Control (ALC) Broadband System Applications, Including Wireless Infrastructure Digital and Spread-Spectrum Communication Systems General Test Equipment Lineup Gain Trim Microwave Terrestrial Links Receiver Gain Control Temperature Compensation Circuits Transmitter Gain Control VSAT/Satellite Modems WCDMA/LTE, TD-SCDMA/TD-LTE, WiMAX®, cdma2000®, GSM/EDGE and MMDS Base Stations

DataSheet

Parametrics

Quality and Environmental Data

• MAX19790.pdf

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