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| Preliminary GaAs IC 35 dB Voltage Variable Attenuator Single Positive Control 0.5-2.5 GHz AV105-12 Features s Single Positive +5 V Control Voltage s 35 dB Attenuation Range @ 0.9 GHz s Excellent Linearity Performance PIN 1 INDICATOR 0.244 (6.20 mm) 0.228 (5.80 mm) SOIC-8 PIN 8 0.050 (1.27 mm) BSC Description The AV105-12 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 8 dB/V slope, with input and output VSWR better than 1.4:1 over all states. Its attenuation range at 1900 MHz is 31 dB. It operates with supply voltage of +5 V and control voltage of 0 V to +5 V in a low cost SOIC-8 package. The RF ports require 25 pF DC blocking capacitors. PIN 1 0.068 (1.73 mm) MAX. 0.020 (0.51 mm) MAX. 0.049 (1.24 mm) 0.016 (0.41 mm) 0.016 MAX. (0.41 mm) x 45 CHAMFER 0.197 (5.00 mm) 0.189 (4.80 mm) 0.010 (0.25 mm) 0.004 (0.10 mm) 0.158 (4.00 mm) 0.150 (3.80 mm) 0.010 (0.25 mm) 0.007 (0.17 mm) 8 MAX. Electrical Specifications at 25C (VS = 5 V) Parameter1 Insertion Loss (VC = 5 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 35 32 28 26 Min. Typ. 2.8 3.2 3.5 33 38 35 31 30 1.8:1 Max. 3.1 3.6 3.8 Unit dB dB dB dB dB dB dB dB Maximum Attenuation (VC = 0 V)2 VSWR (I/O)3 0.5-2.5 GHz Operating Characteristics at 25C (VS = 5 V) Parameter 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. 350 250 Max. Unit nS nS dBm 0.9 GHz 0.0 15 VS 5.0 800 800 V V A 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 Control 0.5-2.5 GHz AV105-12 Typical Performance Data @ 0.9 GHz (Unless Otherwise Specified) 0 0 Maximum Attenuation (dB) 0.5 1.0 1.5 2.0 2.5 -5 -10 -15 -20 -25 -30 -35 -40 -45 0.5 1.0 1.5 2.0 2.5 Insertion Loss (dB) -1 -2 -3 -4 -5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 0 -5 Maximum Attenuation vs. Frequency 1.50 1.40 Input 1.30 1.20 1.10 1.00 Output Attenuation (dB) -10 -20 -25 -30 -35 -40 0 1 2 3 4 5 VSWR -15 0 1 2 3 4 5 VC (V) VC (V) Attenuation vs. Control Voltage VSWR vs. Control Voltage 40 35 30 3.0 Attenuation Normalized to 25C 2.0 Attenuation (dB) IIP3 (dBm) 1.0 0 -1.0 -2.0 -3.0 85C 25 20 15 10 5 0 0 1 2 3 4 5 -20C 0 1.0 2.0 3.0 4.0 5.0 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 Control 0.5-2.5 GHz AV105-12 Absolute Maximum Ratings Characteristic RF Input Power Supply Voltage Control Voltage Operating Temperature Storage Temperature JC Value 50 mW > 500 MHz +4 to +8 V -0.2 V < VC < VS +0.2 V -40C to +85C -65C to +150C 25C/W Pin Out GND GND J2 1 2 8 GND 7 CBL GND J1 3 6 CBL VS 4 5 Note: Exceeding these parameters may cause irreversible damage. VC DC blocking capacitors (CBL) supplied externally. CBL = 25 pF for operation >500 MHz. 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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