Preliminary PHEMT GaAs IC High Linearity Positive Control SPDT Switch DC–2 GHz AS178-73 Features ■ High Linearity (50 dBm IP3 @ 0.9 GHz) @3V SOT-6 0.074 (1.90 mm REF.) 0.126 (3.20 mm) 0.087 (2.20 mm) PIN 6 ■ Low Insertion Loss (0.35 dB @ 0.9 GHz) 0.071 (1.80 mm) 0.052 (1.30 mm) PIN 1 INDICATOR PIN 1 ■ Isolation (21 dB @ 0.9 GHz) ■ +3 V Operation 0.020 (0.51 mm) 0.014 (0.350 mm) ■ Ultra Miniature SOT-6 Package ■ PHEMT Process 0.037 (0.95 mm) REF. 0.057 (1.45 mm) 0.035 (0.90 mm) 0.006 (0.15 mm) 0.000 (0.00 mm) 0.012 (0.30 mm) TYP. 5.0˚ ± 1˚ 0.014 (0.26 mm) 0.004 (0.10 mm) Description The AS178-73 is a PHEMT GaAs FET IC high linearity SPDT switch in a SOT-6 plastic package. This switch has been designed for use where extremely high linearity, low insertion loss and ultra miniature package size are required. It can be controlled with positive, negative or a combination of both voltages. Some standard implementations include antenna changeover, T/R and 5.0˚ ± 1˚ 0.122 (3.10 mm) 0.106 (2.70 mm) 0.022 (0.61 mm) 0.004 (0.10 mm) diversity switching over 2 W. The AS178-73 switch can be used in many analog and digital wireless communication systems including cellular, GSM and DECT applications. Electrical Specifications at 25°C (0, +3 V) Parameter1 Insertion Frequency2 Loss3 Min. DC–0.5 GHz DC–1.0 GHz DC–2.0 GHz Isolation DC–0.5 GHz DC–1.0 GHz DC–2.0 GHz VSWR4 DC–1.0 GHz DC–2.0 GHz 25 20 14 Typ. Max. Unit 0.45 0.45 0.55 0.6 0.6 0.7 dB dB dB 28 23 17 dB dB dB 1.2:1 1.3:1 1.4:1 1.8:1 Typ. Max. Operating Characteristics at 25°C (0, +3 V) Parameter Switching Characteristics5 Condition Frequency Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru Min. Unit 60 100 50 ns ns mV Input Power for 1 dB Compression 0/+3 V 0/+5 V 0.9 GHz 0.9 GHz +34 +38 dBm dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +17 dBm 0/+3 V 0/+5 V 0.9 GHz 0.9 GHz +50 +57 dBm 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. 11/99A 1 PHEMT GaAs IC High Linearity Positive Control SPDT Switch DC–2 GHz AS178-73 0.8 45 0.7 40 0.6 Isolation (dB) Insertion Loss (dB) Typical Performance Data (0, +3 V) 0.5 0.4 0.3 0.2 30 25 20 15 0.1 0.0 0.0 0.5 1.0 1.5 2.0 10 0.0 2.5 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Isolation vs. Frequency Absolute Maximum Ratings 2.0 1.9 Characteristic 1.8 RF Input Power 1.7 VSWR 35 1.6 Value 10 W Max. > 900 MHz 0/+7 V Control Control Voltage 1.5 -0.2 V, +8 V Operating Temperature -40°C to +85°C 1.3 Storage Temperature -65°C to +150°C 1.2 ΘJC 1.4 25°C/W 1.1 1.0 0.0 0.5 1.0 1.5 2.0 2.5 Pin Out Frequency (GHz) VS 0 VHigh VHigh Isolation Insertion Loss 0 Insertion Loss Isolation VHigh = +3 to +5 V (VS = VHigh ± 0.2 V). 2 J3 CBL 4 J1–J3 V1 V2 DC blocking capacitors (CBL) must be supplied externally. CBL = 100 pF for operating frequency >500 MHz. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 11/99A 10 kΩ CBL 3 J1–J2 5 GND V2 6 CBL Truth Table V1 2 J2 1 VSWR vs. Frequency J1