Preliminary GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.8–1.0 GHz AV109-73 Features SOT-6 ■ Single Positive 3 V Control Voltage 0.074 (1.90 mm REF.) ■ 35 dB Attenuation Range @ 0.9 GHz ■ Excellent Linearity Performance 0.126 (3.20 mm) 0.087 (2.20 mm) PIN 6 0.071 (1.80 mm) 0.052 (1.30 mm) PIN 1 INDICATOR PIN 1 Description The AV109-73 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. It operates with supply voltage of +3 V and control voltage of 0 V to +3 V in a low cost SOT-6 package. The RF ports require 25 pF DC blocking capacitors. In addition, an external grounding capacitor is required. 0.020 (0.51 mm) 0.014 (0.350 mm) 0.037 (0.95 mm) REF. 0.057 (1.45 mm) 0.035 (0.90 mm) 0.006 (0.15 mm) 0.000 (0.00 mm) 0.012 (0.30 mm) TYP. 5.0˚ ± 1˚ 0.014 (0.26 mm) 0.004 (0.10 mm) 5.0˚ ± 1˚ 0.122 (3.10 mm) 0.106 (2.70 mm) 0.022 (0.61 mm) 0.004 (0.10 mm) Electrical Specifications at 25°C (VS = 3 V) Parameter1 Frequency Min. Typ. Max. Unit Insertion Loss (VC = 0 V) 0.8–1.0 GHz 3.3 dB Maximum Attenuation (VC = 3 V)2 0.8–1.0 GHz 35 dB VSWR (I/O)3 0.5–2.5 GHz 2.0:1 Operating Characteristics at 25°C (VS = 3 V) Parameter1 Condition Switching Characteristics Rise, On (10/90% or 50% CTL to 90% RF) Fall, Off (90/10% RF or 50% CTL to 10% RF) Intermodulation Intercept Point (IIP3)3 For Two-tone Input Power +0 dBm Frequency Min. Typ. Max. 0.9 GHz Control Voltage (VC) 14 0.0 dBm VS Supply Voltage (VS) 3 Control Current (IC) Supply Current (IS) 0.2 x VC 150 Unit µS µS 1.0 0.3 V mA µA 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Maximum attenuation includes insertion loss. 3. For worst case state. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 10/99A 1 GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.8–1.0 GHz AV109-73 Typical Performance Data @ 0.9 GHz 0 2.0 -5 1.9 1.8 -10 1.7 -15 VSWR Attenuation (dB) (Unless Otherwise Specified) -20 -25 1.6 1.5 Input 1.4 1.3 -30 1.2 -35 1.1 -40 Output 1.0 0 0.5 1.0 1.5 2.0 2.5 0 3.0 0.5 VC (V) Absolute Maximum Ratings 2.5 3.0 VSWR vs. Control Voltage Value Storage Temperature -65°C to +150°C VS CBL VC CBL 4 -40°C to +85°C GND 5 Operating Temperature 6 +3.3 V 3 Control Voltage J1 2 +7 V 1 50 mW > 500 MHz Supply Voltage CBP J2 GND 25°C/W Note: Exceeding these parameters may cause irreversible damage. 2 2.0 Pin Out RF Input Power ΘJC 1.5 VC (V) Attenuation vs. Control Voltage Characteristic 1.0 DC blocking capacitors (CBL) and RF bypass capacitors (CBP) supplied externally. CBL = 25 pF for 900 MHz operation. CBP = 38 pF for 900 MHz operation. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 10/99A