SW-438 GaAs SPDT Switch DC– 3.0 GHz Features • • • • V 1.00 Functional Schematic GHz 1 Low Insertion Loss, 0.7 dB @ 2.4 High Isolation, 25 dB @ 2.4 GHz1 Low Power Consumption, < 10 µA @ +3 V Low Cost Plastic SOT-363 Package 1. C=8pF C=100pF V1 RFC V2 RF1 GND RF2 C≥39pF C=100pF C=100pF C=100pF V1 RFC V2 RF1 GND RF2 For best results at 2.4 GHz, use 8 pF 0402 profile SMT capacitors on RF ports and 100 pF bypassing on pins 4 and 6. Description The SW-438 is a GaAs MMIC SPDT switch in a low cost SOT-363 surface mount plastic package. Typical applications include transmit/receive switching for Bluetooth and WLAN equipment. The SW-438 can also be used in applications up to 500 mW in systems such as cellular, PCS, DCS1800, GSM, CDMA and other analog and digital wireless communications systems. M/A-COM fabricates the SW-438 using a 0.5 micron gate length GaAs p-HEMT process. The process features full passivation for increased performance and reliability. External Component Requirements Please note the values of the external capacitors. The capacitors at each of the RF ports are used as for achieving optimum insertion loss. They also provide DC blocking for positive control. The 8 pF (0402) capacitor is recommended for 2 - 3 GHz operation. If this value is changed or the capacitor placed too far from the switch, the performance will be affected. We also recommend 100 pF bypass capacitors on pins 4 and 6. For broadband applications with positive control voltages, use DC blocking capacitors with value of 39 pF or more. PIN 1 PIN 1 Broad Band Applications 2.4 GHz Application C=8pF Pin No. Function Description 1 RF1 RF Input/Output 2 GND RF Ground 3 RF2 RF Input/Output 4 V2 Control 2 Input 5 RFC RF Common Port 6 V1 Control 1 Input Ordering Information Part Number V1 V2 RFC-RF1 RFC-RF2 Positive1 0 + 0.2V +2.3 to +5V +2.3 to +5V 0 + 0.2V Off On On Off Negative 2 0 + 0.2V -2.3 to +5V -2.3 to +5V 0 + 0.2V On Off Off On Package SW-438TR-3000 SW-438 on 13 Inch, 3000 piece Reel SW-438SMB SW-438 sample test board (Control) 1. 2. C≥39pF Pin Configuration Truth Table Mode C≥39pF C=8pF External DC blocking capacitors are required on all RF ports. If negative control is used, DC blocking capacitors are not required on RF ports. GaAs SPDT Switch, DC-3.0 GHz SW-438 V 1.00 Electrical Specifications: TA = 25°C, 3V Control Parameter Test Conditions Units Min Typ Max Insertion Loss DC-3.0 GHz dB 0.7 0.8 Isolation DC-1.0 GHz 1.0-2.0 GHz 2.0-3.0 GHz dB dB dB 29 23 21 31 25 23 Return Loss DC-1.5 GHz 1.5-3.0 GHz dB dB 18 16 22 20 P1dB (2.3 V supply) 500 MHz-2.0 GHz dBm 23 26 P1dB (3V supply) 500 MHz-2.0 GHz dBm 28 31 IP2 2-tone 900 MHz, 5 MHz spacing (2.3V) dBm 81 IP3 2-tone 900 MNz, 5 MHz spacing (2.3V) dBm 55 2nd Harmonic 2.4 GHz Pin = 20 dBm, Vc = 2.3V dBc 70 3rd Harmonic 2.4 GHz Pin = 20 dBm, Vc = 2.3V dBc 60 Ton, Toff 50% ctl to 10/90% RF ns 20 Trise, Tfall 10% to 90% RF ns 10 Gate Leakage |Vctl| = 5V µA 5 10 Typical Performance Curves Bluetooth Applications (8 pF DC Blocking Capacitors, +2.3V Control) Insertion Loss vs. Frequency Over Temperature Isolation vs. Frequency Over Temperature 30 1.0 0.9 28 +25°C 27 0.7 Isolation (dB) Insertion Loss (dB) 0.8 29 +85°C 0.6 0.5 -40°C 0.4 26 +25°C -40°C 25 24 0.3 23 0.2 22 0.1 21 +85°C 20 0.0 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Frequency (GHz) Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 3.0 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Frequency (GHz) 2.7 2.8 2.9 3.0 2 GaAs SPDT Switch, DC-3.0 GHz SW-438 V 1.00 Return Loss vs. Freqency Over Temperature 35 Return Loss (dB) 30 +85°C 25 +25°C 20 -40°C 15 10 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 Frequency (GHz) Broadband Applications (No DC Blocking Capacitors, -2.3 V Control) Insertion Loss vs. Frequency Over Temperature Isolation vs. Frequency Over Temperature 1.0 0.9 60 +85°C 55 Insertion Loss (dB) 0.8 50 0.7 Isolation (dB) 0.6 +25°C -40°C 0.5 0.4 45 40 -40°C 35 0.3 +25°C 30 0.2 25 0.1 0.0 0.0 +85°C 20 0.5 1.0 1.5 2.0 Frequency (GHz) 2.5 3.0 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) 2.5 3.0 Return Loss vs. Frequency Over Temperature 35 Return Loss (dB) 30 25 +85°C 20 +25°C -40°C 15 10 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) 2.5 3.0 Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 3 GaAs SPDT Switch, DC-3.0 GHz SW-438 V 1.00 SOT-363 (SC-70) Plastic Package Dimension Measurement (mm) Min. Nom. Max. A — — 1.10 A1 0 — 0.10 A2 0.70 0.90 1.00 b 0.15 — 0.30 c 0.08 — 0.22 D 2.00 basic e 0.65 basic E 2.10 basic E1 1.25 basic L 0.42 ref. Note: See JEDEC MO-203 VAR AB for Additional dimensions and tolerances. PIN 6 D A e e E1 E PIN 1 L c A A1 A2 b Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information.