Preliminary GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.5–2.5 GHz AV108-59 Features MSOP-8 ■ Single Positive +3 V Control Voltage ■ 35 dB Attenuation Range @ 0.9 GHz 0.0256 (0.65 mm) TYP. PIN 1 INDICATOR 0.118 (3.00 mm) ± 0.004 (0.1 mm) SQ. ■ Excellent Linearity Performance Description PIN 1 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. 0.012 (0.30 mm) 7.0˚ 0.038 (0.95 mm) TYP. 0.030 (0.75 mm) 0.017 (0.43 mm) 0.193 (4.90 mm) REF. + 0.006 (0.15 mm) - 0.002 (0.05 mm) 0.007 (0.18 mm) ± 0.005 (0.12 mm) 0.006 (0.15 mm) 0.002 (0.05 mm) 8.0˚ MAX. 0.028 (0.70 mm) 0.016 (0.40 mm) Electrical Specifications at 25°C (VS = 3 V) Parameter1 Frequency Insertion Loss (VC = 0 V) 0.5–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz Maximum Attenuation (VC = 3 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 34 28 25 23 Typ. Max. Unit 3.4 3.5 3.8 3.6 3.8 4.2 dB dB dB 32 37 33 30 26 dB dB dB dB dB 1.8:1 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. 0.9 GHz Control Voltage (VC) Typ. Max. Unit 1.0 0.3 µS µS 10 dBm 0.0 VS V Supply Voltage (VS) 3 V Control Current (IC) 0.2 x VC mA Supply Current (IS) 150 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 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) Insertion Loss (dB) -0.5 -1.0 -1.5 -20. -2.5 -3.0 -3.5 -4.0 -4.5 -5.0 -10 -15 -20 -25 -30 -35 -40 0.5 1.0 1.5 2.0 2.5 0.50 1.00 1.50 2.50 Frequency (GHz) Insertion Loss vs. Frequency Maximum Attenuation vs. Frequency 0 2.0 -5 1.9 1.8 -10 1.7 -15 -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 3.0 0 0.5 1.0 VC (V) 1.5 2.0 2.5 3.0 VC (V) Attenuation vs. Control Voltage VSWR vs. Control Voltage 5 30 Attenuation Normalized to 25˚C 4 Insertion Loss (dB) 25 IIP3 (dBm) 2.00 Frequency (GHz) VSWR Attenuation (dB) -5 20 15 10 5 3 85˚C 2 1 70˚C 0 25˚C -1 -2 -20˚C -3 -4 0 -5 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.5 VC (V) 1.5 2.0 2.5 3.0 VC (V) Input IP3 vs. Control Voltage 2 1.0 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 3 V Control 0.5–2.5 GHz Absolute Maximum Ratings Characteristic Pin Out Value Storage Temperature -65°C to +150°C ΘJC 25°C/W GND 5 -40°C to +85°C CBL VC CBL VS 4 Operating Temperature J1 GND 6 +3.3 V 7 Control Voltage 8 +7 V GND 3 Supply Voltage GND 2 50 mW > 500 MHz 1 RF Input Power AV108-59 J2 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 [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A 3