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| GaAs IC High Isolation Positive Control SPDT Switch DC-2.5 GHz AS118-12 Features s Positive Control s High Isolation (45 dB @ 0.9 GHz) s Low Insertion Loss (0.5 dB @ 0.9 GHz) PIN 1 INDICATOR 0.244 (6.20 mm) 0.228 (5.80 mm) SOIC-8 PIN 8 0.050 (1.27 mm) BSC 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. PIN 1 0.068 (1.73 mm) MAX. 0.020 (0.51 mm) MAX. 0.049 (1.24 mm) 0.016 (0.41 mm) 0.016 MAX. (0.41 mm) x 45 CHAMFER 0.197 (5.00 mm) 0.189 (4.80 mm) 0.010 (0.25 mm) 0.004 (0.10 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 25C (0, +5 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 46 43 24 15 Min. Typ. 0.55 0.6 0.7 0.9 50 46 27 18 1.2:1 1.4:1 1.6:1 1.4:1 1.7:1 2.1:1 Max. 0.65 0.7 0.8 1.1 Unit dB dB dB dB dB dB dB dB Isolation VSWR4 DC-1.0 GHz DC-2.0 GHz DC-2.5 GHz Operating Characteristics at 25C (0, +5 V) Parameter1 Switching Characteristics5 Condition Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru 0.9 GHz For Two-tone Input Power +10 dBm 0.9 GHz 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 Frequency Min. Typ. 60 100 50 +26 +41 Max. Unit ns ns mV dBm dBm Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) Control Voltages 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 High Isolation Positive Control SPDT Switch DC-2.5 GHz AS118-12 Typical Performance Data (0, +5 V) 1.1 1.0 0.9 50 0.8 85C 0.7 0.6 0.5 0 0.5 1.0 1.5 2.0 2.5 25C 0C 20 0 0.5 1.0 1.5 2.0 2.5 30 70 60 dB 40 dB Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0 0.5 1.0 1.5 2.0 2.5 Supply Voltage Control Voltage Isolation vs. Frequency Absolute Maximum Ratings Characteristic RF Input Power Value 1 W Max. > 0.9 GHz 0/+5 V Control +8 V -0.2 V, +8 V -40C to +85C -65C to +150C 85C/W Operating Temperature Storage Temperature JC Frequency (GHz) VSWR vs. Frequency Pin Out GND CBL J3 8 1 Truth Table V1 VHigh 0 V2 0 VHigh J1-J2 Insertion Loss Isolation J1-J3 Isolation Insertion Loss J1 CBL VS V1 V2 7 2 3 6 VHigh = +3 to +5 V (VS = VHigh 0.2 V). GND CBL J2 5 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 sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A 4 |
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