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| GaAs IC SPDT Reflective Switch Positive Control DC-2.5 GHz AS125-73 Features s Low Insertion Loss (0.4 dB @ 0.9 GHz) s Complementary Positive Control Voltages (0/+3 V to 0/+5 V) s Positive Voltage Supply (+3 to +5 V) s Low DC Power Consumption s Ultra Miniature 6 Lead SOT-6 Package SOT-6 0.074 (1.90 mm REF.) PIN 6 PIN 1 INDICATOR PIN 1 0.020 (0.51 mm) 0.014 (0.350 mm) 0.057 (1.45 mm) 0.035 (0.90 mm) 0.126 (3.20 mm) 0.087 (2.20 mm) 0.071 (1.80 mm) 0.052 (1.30 mm) 0.037 (0.95 mm) REF. 0.012 (0.30 mm) TYP. 0.014 (0.26 mm) 0.004 (0.10 mm) 5.0 1 Description The AS125-73 is a GaAs IC FET SPDT reflective switch in the SOT-6 plastic package for commercial applications. For positive operation it requires a fixed positive bias (VS) on the J1 line and DC blocks on all RF lines. This switch can also be operated with complementary negative voltage (no VS or blocking caps required). The AS125-73 provides a low cost solution for IF switching requirements in dual band and dual mode subscribers. 0.006 (0.15 mm) 0.000 (0.00 mm) 5.0 1 0.122 (3.10 mm) 0.106 (2.70 mm) 0.022 (0.61 mm) 0.004 (0.10 mm) Electrical Specifications at 25C (0, +3 V) Parameter1 Insertion Loss3 Frequency2 DC-0.5 DC-1.0 DC-2.0 DC-2.5 DC-0.5 DC-1.0 DC-2.0 DC-2.5 GHz GHz GHz GHz GHz GHz GHz GHz 22 17 11 10 Min. Typ. 0.4 0.45 0.6 0.9 25 20 14 13 1.2:1 1.5:1 1.3:1 1.7:1 Max. 0.5 0.6 0.8 1.1 Unit dB dB dB dB dB dB dB dB Isolation VSWR4 DC-1.0 GHz DC-2.5 GHz Operating Characteristics at 25C (0, +3 V) Parameter Switching Characteristics5 Condition Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru 0/+3 V 0/+5 V For Two-tone Input Power +13 dBm 0.5-2.0 GHz 0.5-2.0 GHz 0.5-2.0 GHz Frequency Min. Typ. 10 20 25 +21 +28 +45 Max. Unit ns ns mV dBm dBm dBm Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) Control Voltages VLow = 0 to 0.2 V @ 20 A Max. VHigh = +3 V @ 100 A Max. to +5 V @ 200 A Max. VS = VHigh 0.2 V 1. All measurements made in a 50 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 sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A 1 GaAs IC SPDT Reflective Switch Positive Control DC-2.5 GHz AS125-73 Typical Performance Data (0, +3 V) 1.4 1.2 1.0 40 35 30 25 dB dB 0.8 0.6 0.4 0.2 0 0 0.5 1.0 1.5 2.0 2.5 20 15 10 5 0 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 2.0 1.8 1.6 Control Voltage 1.4 1.2 1 0 0.5 1.0 1.5 2.0 2.5 Isolation vs. Frequency Absolute Maximum Ratings Characteristic RF Input Power Value 2 W > 500 MHz 0/+7 V Control -0.2 V, +8 V -40C to +125C -50C to +150C 25C/W Operating Temperature Storage Temperature JC Pin Out J3 CBL GND J1 V1 V2 J2 Frequency (GHz) VSWR vs. Frequency 1 2 6 5 Truth Table Positive Operation V1 0 VHigh V2 VHigh 0 J1-J2 Isolation Insertion J1-J3 Insertion Isolation CBL 10 k VS DC blocking capacitors (CBL) and biasing resistor must be supplied externally for positive voltage operation. CBL = 100 pF for operation >500 MHz. 3 4 CBL VHigh = +3 to +5 V (VS = VHigh 0.2 V). 2 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A |
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