GaAs IC High Isolation Positive Control SPDT Switch DC–2.5 GHz AS148-24 Features SOIC-14 ■ Positive Voltage Control PIN 14 ■ High Isolation (50 dB @ 0.9 GHz and 1.9 GHz) 0.050 (1.27 mm) BSC 0.050 (1.27 mm) 0.016 (0.40 mm) 0.244 (6.20 mm) 0.228 (5.80 mm) 0.158 (4.01 mm) 0.150 (3.81 mm) ■ Low DC Power Consumption PIN 1 INDICATOR ■ Base Station Synthesizer Switch 0.020 (0.51 mm) 0.013 (0.33 mm) PIN 1 0.068 (1.73 mm) MAX. Description GaAs FET IC SPDT switch packaged in an SOIC-14 plastic package for low cost commercial applications. Ideal building block for base station dual band applications where synthesizer isolation is critical. Use in conjunction with the AS123-12 SPST switch to meet GSM synthesizer isolation requirement. 0.049 (1.24 mm) 0.016 (0.41 mm) 0.016 MAX. (0.41 mm) x 45˚ CHAMFER 8˚ MAX. 0.344 (8.75 mm) 0.337 (8.55 mm) 0.010 (0.25 mm) 0.0098 (0.25 mm) 0.004 (0.10 mm) 0.0075 (0.19 mm) 0.158 (4.00 mm) 0.150 (3.80 mm) Electrical Specifications at 25°C (0, +5 V) Parameter1 Insertion Frequency2 Loss3 Min. DC–1.0 GHz DC–2.0 GHz DC–2.5 GHz Isolation DC–1.0 GHz DC–2.0 GHz DC–2.5 GHz VSWR4 DC–2.0 GHz DC–2.5 GHz 44 45 32 Typ. Max. Unit 0.6 0.8 1.2 0.9 1.1 1.4 dB dB dB 50 50 42 dB dB dB 1.3:1 1.5:1 1.5:1 1.8:1 Typ. Max. Operating Characteristics at 25°C (0, +5 V) Parameter Condition Frequency Switching Characteristics5 Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru Intermodulation Intercept Point (IP3) Two-tone Input Power +10 dBm Control Voltages VLow = 0 to 0.2 V @ 20 µA Max. VHigh = +5 V @ 200 µA Max. to +7 V @ 500 µA Max. VS = VHigh ± 0.2 V 0.5–2.0 GHz Min. Unit 60 100 50 ns ns mV +41 dBm 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 AS148-24 Typical Performance Data (0, +5 V) 1.25 60 dB 70 dB 1.5 1.0 0.75 50 40 0.5 30 DC .5 1.0 1.5 2.0 2.5 DC .5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Isolation vs. Frequency 1.4 Absolute Maximum Ratings Characteristic 1.3 Value RF Input Power 1.2 1.1 1 W Max. > 500 MHz 0/+8 V Control 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 1.0 DC .5 1.0 1.5 2.0 25°C/W 2.5 Frequency (GHz) Pin Out VSWR vs. Frequency J2 Truth Table J3 CBL V1 V2 J1–J2 J1–J3 VHigh 0 Isolation Insertion Loss 0 VHigh Insertion Loss Isolation CBL GND V1 GND V2 GND 14 13 12 11 10 9 8 1 2 3 4 5 6 7 VHigh = +5 to +7 V (VS = VHigh ± 0.2 V). GND VS GND GND GND GND CBL J1 DC blocking capacitors (CBL) must be supplied externally. CBL = 100 pF for operation >500 MHz. 2 2.5 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A