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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
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Status
Active: In Production.
Description
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.
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Data Sheet
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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
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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
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Key Specifications:
| RF and IF Variable Gain Amplifiers |
| Part Number |
Gain Cntl. |
Channels |
RF Freq.
(MHz) |
RF Freq.
(MHz) |
Analog Attenuation Range |
Gain
(dB) |
Noise Figure
(dB) |
OIP3
(dBm) |
OIP2
(dBm) |
HD2
(dBc) |
HD3
(dBc) |
VCC
(V) |
ISUPPLY
(mA) |
Footprint
(mm x mm) |
Package/Pins |
Oper. Temp.
(°C) |
Budgetary Price |
| min |
max |
max |
See Notes |
| MAX19790 |
Analog |
1 |
250 |
4000 |
44.7 |
-4.4 |
4.4 |
31.9 |
65.2 |
-72 |
-77 |
4.75 to 5.25 |
7.3 |
6.0 x 6.0 |
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-40 to +85 |
$5.25 @1k |
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See All RF and IF Variable Gain Amplifiers (14)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Application Circuit
More Information
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Information Index
Document Ref.: 19-5165
Rev 0;
2010-03-22
This page last modified: 2010-11-05
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