Preliminary GaAs IC 35 dB Voltage Variable Attenuator Single Positive Control 0.5–2.5 GHz AV105-12 Features SOIC-8 ■ Single Positive +5 V Control Voltage PIN 8 0.050 (1.27 mm) BSC ■ 35 dB Attenuation Range @ 0.9 GHz ■ Excellent Linearity Performance 0.244 (6.20 mm) 0.228 (5.80 mm) PIN 1 INDICATOR 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. 0.020 (0.51 mm) MAX. PIN 1 0.068 (1.73 mm) MAX. 0.197 (5.00 mm) 0.189 (4.80 mm) 0.010 (0.25 mm) 0.004 (0.10 mm) 0.016 MAX. (0.41 mm) x 45˚ CHAMFER 0.049 (1.24 mm) 0.016 (0.41 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 25°C (VS = 5 V) Parameter1 Frequency Insertion Loss (VC = 5 V) 0.5–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz Maximum Attenuation (VC = 0 V)2 0.5–0.8 0.8–1.0 1.0–1.7 1.7–2.0 2.0–2.5 VSWR (I/O)3 0.5–2.5 GHz GHz GHz GHz GHz GHz Min. 25 35 32 28 26 Typ. Max. Unit 2.8 3.2 3.5 3.1 3.6 3.8 dB dB dB 33 38 35 31 30 dB dB dB dB dB 1.8:1 Operating Characteristics at 25°C (VS = 5 V) Parameter 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. 0.9 GHz Control Voltage (VC) Typ. Max. Unit 350 250 nS nS 15 dBm 0.0 VS V Supply Voltage (VS) 5.0 V Control Current (IC) 800 µA Supply Current (IS) 800 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. 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 Maximum Attenuation (dB) Insertion Loss (dB) 0 -1 -2 -3 -4 -5 -5 -10 -15 -20 -25 -30 -35 -40 -45 0.5 1.0 1.5 2.0 2.5 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Maximum Attenuation vs. Frequency 0 1.50 1.40 -10 Input -15 VSWR Attenuation (dB) -5 -20 -25 -30 1.30 Output 1.20 1.10 -35 -40 1.00 0 1 2 3 4 5 0 1 2 VC (V) 4 5 VC (V) Attenuation vs. Control Voltage VSWR vs. Control Voltage 3.0 40 Attenuation Normalized to 25˚C 2.0 Attenuation (dB) 35 30 IIP3 (dBm) 3 25 20 15 10 85˚C 1.0 0 -1.0 -20˚C -2.0 5 -3.0 0 0 1 2 3 4 5 0 1.0 3.0 4.0 5.0 VC (V) VC (V) Input IP3 vs. Control Voltage 2 2.0 Attenuation vs. Control Voltage Over Temperature Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • 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 Absolute Maximum Ratings Characteristic Pin Out Value Control Voltage -0.2 V < VC < VS +0.2 V -40°C to +85°C CBL GND 5 J1 GND 6 ΘJC -65°C to +150°C GND 3 Storage Temperature GND 7 +4 to +8 V 8 Supply Voltage 2 50 mW > 500 MHz 1 RF Input Power Operating Temperature AV105-12 VC CBL J2 25°C/W VS 4 Note: Exceeding these parameters may cause irreversible damage. DC blocking capacitors (CBL) supplied externally. CBL = 25 pF for operation >500 MHz. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A 3