Preliminary GaAs IC 25 dB Voltage Variable Attenuator Single Positive Control 0.5–2.5 GHz AV104-12 Features SOIC-8 ■ Single Positive +5 V Control Voltage PIN 8 0.050 (1.27 mm) BSC ■ 25 dB Attenuation Range @ 0.9 GHz ■ High IP3 (20 dBm @ 0.9 GHz) 0.244 (6.20 mm) 0.228 (5.80 mm) PIN 1 INDICATOR ■ Excellent Linearity Performance 0.020 (0.51 mm) MAX. PIN 1 Description The AV104-12 GaAs IC FET voltage variable attenuator provides 25 dB attenuation range at 900 MHz controlled by a single positive voltage. The VVA has a linear transfer curve of 5 dB/V slope, with input and output VSWR better than 1.4:1 over all states. Its attenuation range at 1900 MHz is 22 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. 0.068 (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. 16 21 19 17 15 Typ. Max. Unit 2.7 3.0 3.2 3.0 3.4 3.7 dB dB dB 20 25 23 21 19 dB dB dB dB dB 1.4:1 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 1.0 1.5 µS µS 20 dBm 0.0 VS V Supply Voltage (VS) 5.0 V Control Current (IC) 2.5 mA Supply Current (IS) 2.5 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 25 dB Voltage Variable Attenuator Single Positive Control 0.5–2.5 GHz AV104-12 Typical Performance Data @ 0.9 GHz 0 0 -1 -5 Attenuation (dB) Insertion Loss (dB) (Unless Otherwise Specified) -2 -3 -4 -10 -15 -20 -25 -5 0.5 1.0 1.5 2.0 -30 2.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Frequency (GHz) VC (V) Insertion Loss vs. Frequency Attenuation vs. Control Voltage 1.5 40 35 1.4 IIP3 (dBm) VSWR 30 1.3 1.2 Input 20 15 10 1.1 5 Output 1 0 25 0 1 2 3 4 5 0 1 2 3 4 VC (V) VC (V) VSWR vs. Control Voltage Input IP3 vs. Control Voltage 1.5 Attenuation Normalized to 25˚C Attenuation (dB) 1.0 85˚C 0.5 0 -0.5 -20˚C -1.0 -1.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VC (V) Attenuation vs. Control Voltage Over Temperature 2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A 5 GaAs IC 25 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 2 100 mW > 500 MHz 1 RF Input Power Operating Temperature AV104-12 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