Analog Devices MAX19790 Product Info

• 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

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.

Applications

• 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