GaAs IC High Isolation Positive Control SPDT Switch DC–2.5 GHz AS118-12 Features SOIC-8 ■ Positive Control PIN 8 0.050 (1.27 mm) BSC ■ High Isolation (45 dB @ 0.9 GHz) ■ Low Insertion Loss (0.5 dB @ 0.9 GHz) Description The AS118-12 is a reflective SPDT FET IC switch. The switch requires external DC blocking capacitors, positive supply and two positive controls. The device is mounted in a plastic SOIC-8 package for surface mounting and is ideal for use in high isolation switching applications, such as base station synthesizer switching. 0.244 (6.20 mm) 0.228 (5.80 mm) PIN 1 INDICATOR 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 (0, +5 V) Parameter1 Frequency2 Insertion Loss3 DC–0.5 DC–1.0 DC–2.0 DC–2.5 GHz GHz GHz GHz Isolation DC–0.5 DC–1.0 DC–2.0 DC–2.5 GHz GHz GHz GHz VSWR4 DC–1.0 GHz DC–2.0 GHz DC–2.5 GHz Min. 46 43 24 15 Typ. Max. Unit 0.55 0.6 0.7 0.9 0.65 0.7 0.8 1.1 dB dB dB dB 50 46 27 18 dB dB dB dB 1.2:1 1.4:1 1.6:1 1.4:1 1.7:1 2.1:1 Typ. Max. Operating Characteristics at 25°C (0, +5 V) Parameter1 Switching Characteristics5 Condition Frequency Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru Input Power for 1 dB Compression Min. Unit 60 100 50 ns ns mV 0.9 GHz +26 dBm 0.9 GHz +41 dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +10 dBm Control Voltages VLow = 0 to 0.2 V @ 20 µA Max. VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max. VS = VHigh ± 0.2 V 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. DC = 300 kHz. 3. Insertion loss changes by 0.003 dB/°C. 4. Insertion loss state. 5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. 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 High Isolation Positive Control SPDT Switch DC–2.5 GHz AS118-12 Typical Performance Data (0, +5 V) 1.1 70 1.0 60 0.9 dB dB 50 0.8 40 85˚C 0.7 25˚C 0.6 30 0˚C 0.5 20 0 0.5 1.0 1.5 2.0 2.5 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Isolation vs. Frequency 2.5 Absolute Maximum Ratings 1.6 Characteristic 1.5 RF Input Power 1 W Max. > 0.9 GHz 0/+5 V Control 1.4 1.3 1.2 1.1 Value Supply Voltage +8 V Control Voltage -0.2 V, +8 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C ΘJC 85°C/W 1.0 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Pin Out VSWR vs. Frequency Insertion Loss VHigh = +3 to +5 V (VS = VHigh ± 0.2 V). J1 V2 5 Isolation Isolation V1 6 Insertion Loss VHigh 7 0 0 8 VHigh VS J1–J3 4 J1–J2 3 V2 CBL 2 V1 1 GND Truth Table CBL GND DC blocking capacitors (CBL) must be supplied externally. CBL = 100 pF for operation >500 MHz. 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 CBL J3 J2