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| Preliminary GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.5-2.5 GHz AV108-59 Features s Single Positive +3 V Control Voltage s 35 dB Attenuation Range @ 0.9 GHz s Excellent Linearity Performance PIN 1 INDICATOR MSOP-8 0.0256 (0.65 mm) TYP. 0.118 (3.00 mm) 0.004 (0.1 mm) SQ. 0.193 (4.90 mm) REF. Description The AV108-59 GaAs IC FET voltage variable attenuator provides 35 dB attenuation range at 900 MHz controlled by a single positive voltage. The VVA has a linear transfer curve of 12 dB/V slope, with input and output VSWR better than 2:1 over all states. Its attenuation range at 1900 MHz is 25 dB. It operates with supply voltage of +3 V and control voltage of 0 V to +3 V in a low cost MSOP-8 package. The RF ports require 25 pF DC blocking capacitors. PIN 1 0.012 (0.30 mm) + 0.006 (0.15 mm) - 0.002 (0.05 mm) 7.0 0.038 (0.95 mm) TYP. 0.030 (0.75 mm) 0.017 (0.43 mm) 0.007 (0.18 mm) 0.005 (0.12 mm) 8.0 MAX. 0.006 (0.15 mm) 0.002 (0.05 mm) 0.028 (0.70 mm) 0.016 (0.40 mm) Electrical Specifications at 25C (VS = 3 V) Parameter1 Insertion Loss (VC = 0 V) Frequency 0.5-1.0 GHz 1.0-2.0 GHz 2.0-2.5 GHz 0.5-0.8 0.8-1.0 1.0-1.7 1.7-2.0 2.0-2.5 GHz GHz GHz GHz GHz 25 34 28 25 23 Min. Typ. 3.4 3.5 3.8 32 37 33 30 26 1.8:1 Max. 3.6 3.8 4.2 Unit dB dB dB dB dB dB dB dB Maximum Attenuation (VC = 3 V)2 VSWR (I/O)3 0.5-2.5 GHz Operating Characteristics at 25C (VS = 3 V) Parameter1 Switching Characteristics Intermodulation Intercept Point (IIP3)3 Control Voltage (VC) Supply Voltage (VS) Control Current (IC) Supply Current (IS) 1. All measurements made in a 50 system, unless otherwise specified. 2. Maximum attenuation includes insertion loss. 3. For worst case state. Condition Rise, On (10/90% or 50% CTL to 90% RF) Fall, Off (90/10% RF or 50% CTL to 10% RF) For Two-tone Input Power +0 dBm Frequency Min. Typ. 1.0 0.3 Max. Unit S S dBm 0.9 GHz 0.0 10 VS 3 0.2 x VC 150 V V mA A Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A 1 GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.5-2.5 GHz AV108-59 Typical Performance Data @ 0.9 GHz (Unless Otherwise Specified) 0.0 0 Maximum Attenuation (dB) 0.5 1.0 1.5 2.0 2.5 -0.5 -5 -10 -15 -20 -25 -30 -35 -40 0.50 1.00 1.50 2.00 2.50 Insertion Loss (dB) -1.0 -1.5 -20. -2.5 -3.0 -3.5 -4.0 -4.5 -5.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 0 -5 Maximum Attenuation vs. Frequency 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 Output 0 0.5 1.0 1.5 2.0 2.5 3.0 Input Attenuation (dB) -10 -15 -20 -25 -30 -35 -40 0 0.5 1.0 1.5 2.0 2.5 3.0 VC (V) VSWR VC (V) Attenuation vs. Control Voltage 30 25 5 4 VSWR vs. Control Voltage Attenuation Normalized to 25C 85C 70C 25C Insertion Loss (dB) 3 2 1 0 -1 -2 -3 -4 -5 IIP3 (dBm) 20 15 10 5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 -20C 0 0.5 1.0 1.5 2.0 2.5 3.0 VC (V) VC (V) Input IP3 vs. Control Voltage Attenuation vs. Control Voltage Over Temperature 2 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.5-2.5 GHz AV108-59 Absolute Maximum Ratings Characteristic RF Input Power Supply Voltage Control Voltage Operating Temperature Storage Temperature JC Value 50 mW > 500 MHz +7 V +3.3 V -40C to +85C -65C to +150C 25C/W Pin Out GND GND J1 CBL VS 4 5 GND CBL GND VC 3 6 J2 1 2 8 7 DC blocking capacitors (CBL) supplied externally. CBL = 25 pF for operation >500 MHz. Note: Exceeding these parameters may cause irreversible damage. Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A 3 |
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