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HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 QFN16L (4 x 4 mm) Features *Combination of 1 DPDT and 2 SPDT switches *Low Insertion Loss : 1.30 dB @ 2.50 GHz 1.55 dB @ 5.85 GHz Isolation: 26 dB @ 2.50 GHz * 19 dB @ 5.85 GHz * Flexible selection of 2.5/5.8 GHz Tx/Rx ports * Low DC Power Consumption * Miniature QFN16L (4x4 mm) Plastic Package * PHEMT process Description The HWS379 is a GaAs PHEMT MMIC DP4T switch operating at DC-6 GHz in a low cost miniature QFN16L (4 x 4 mm) plastic package. The HWS379 combines one DPDT switch and two SPDT switches in a single IC and features low insertion loss and high isolation with very low DC power consumption. This switch can be used in IEEE 802.11a/b/g WLAN systems for combination of transmit/receive and antenna diversity functions. Two antenna ports can be selected for antenna diversity function and four RF ports can be arbitrary chosen for 2.5 GHz band or 5.85 GHz band as transmit/receive functions. Electrical Specifications at 25 with 0, +3V Control Voltages C Parameter Insertion Loss ANT ports to RF ports Isolation (SPDT part) Ex: ANT1 to RF2 when ANT1 to RF1 is on Isolation (DPDT part) Ex: ANT2 to RF1 when ANT1 to RF1 is on Return Loss Input Power for One dB Compression Switching Time Control Current Test Conditions 0.01-6.00 GHz 2.40-2.50 GHz 5.15-5.85 GHz 0.01-6.00 GHz 2.40-2.50 GHz 5.15-5.85 GHz 0.01-6.00 GHz 2.40-2.50 GHz 5.15-5.85 GHz 0.01-6.00 GHz 2.40-2.50 GHz 5.15-5.85 GHz 2.00-6.00 GHz 16 24 Min. Typ. 1.60 1.30 1.55 25 26 27 19 27 19 12 20 15 30 70 30 300 Max. 1.50 1.85 Unit dB dB dB dB dB dB dB dB dB dB dB dB dBm nsec uA Note: All measurements made in a 50 ohm system with 0/+3.0V control voltages, unless otherwise specified. Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 Typical Performance Data with 8pF Capacitors @ +25 C Insertion Loss vs Frequency -0.8 -1.0 -1.2 -1.4 -1.6 -1.8 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Frequency(GHz) 5.5 6.0 Absolute Maximum Ratings Parameter RF Input Power Control Voltage Operating Temperature Storage Temperature Absolute Maximum +32 dBm @ +3V +6V -40 to +85 C C -65 to +150 C C Insertion Loss(dB) VC1 VC2 RF1 16 15 14 13 Isolation vs Frequency -10 -15 SPDT part DPDT part ANT1 GND CB CB CB GND 1 2 12 11 10 9 5 RF2 GND Isolation(dB) -20 -25 ANT2 CB GND CB 3 4 RF3 GND 6 7 8 VC3 -40 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Frequency(GHz) 5.5 6.0 Pin Out (Top View) Note: 1. DC blocking capacitors CB=8pF are required on all RF ports. Return Loss vs Frequency -5 -10 Return Loss(dB) 2. Exposed pad in the bottom must be connected to ground by via holes. Logic Table for Switch On-Path VC1 0 1 0 VC3 VC2 1 0 1 0 1 1 0 0 VC4 0 0 1 1 ANT1 RF1 RF3 RF2 RF4 ANT2 RF3 RF1 RF4 RF2 -15 -20 -25 -30 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 1 Frequency(GHz) `1' = +3V to +5V `0' = 0V to +0.2V Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. RF4 -35 CB -30 VC4 GND HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 Application Information Simplified Application Block Diagram Between HWS379 and WLAN 802.11 a/b/g RFIC Antenna Select ANT2 ANT1 Antenna SelectInv VC1 VC3 VC2 Band Select Band SelectInv VC4 RF1 RF2 HB_RX RF3 LB_TX RF4 HB_TX HWS379 DP4T Switch WLAN 802.11a/b/g RFIC LB_RX Note: 1. VC1 and VC3 are used for antenna selection, while VC2 and VC4 are used for band selection. 2. LB_RX stands for low-band(2.5 GHz band) receiving port and HB_TX stands for high-band(5.85 GHz band) transmitting port. 3. RF paths between switch and RFIC may include amplifiers, filters, and baluns. Logic Table for Switch On-Path VC1 VC3 VC2 (BandSelect) 1 1 0 0 VC4 (BandSelectInv) 0 0 1 1 RF1(LB_RX) RF3(LB_TX) RF2(HB_RX) RF4(HB_TX) RF3(LB_TX) RF1(LB_RX) RF4(HB_TX) RF2(HB_RX) ANT1 ANT2 (AntennaSelect) (AntennaSelectInv) 0 1 0 1 1 0 1 0 Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 Application Information (Continued) Simplified Application Block Diagram Between HWS379 and WLAN 802.11 a/b/g RFIC Antenna Select ANT2 ANT1 Antenna SelectInv VC1 VC3 Band Select Band SelectInv VC4 RF1 RF2 LB_RX RF3 HB_TX RF4 LB_TX WLAN 802.11a/b/g RFIC HB_RX VC2 HWS379 DP4T Switch Note: 1. VC1 and VC3 are used for antenna selection, while VC2 and VC4 are used for band selection. 2. LB_RX stands for low-band(2.5 GHz band) receiving port and HB_TX stands for high-band(5.85 GHz band) transmitting port. 3. RF paths between switch and RFIC may include amplifiers, filters, and baluns. Logic Table for Switch On-Path VC1 VC3 VC2 (BandSelect) 1 1 0 0 VC4 (BandSelectInv) 0 0 1 1 RF1(HB_RX) RF3(HB_TX) RF2(LB_RX) RF4(LB_TX) RF3(HB_TX) RF1(HB_RX) RF4(LB_TX) RF2(LB_RX) ANT1 ANT2 (AntennaSelect) (AntennaSelectInv) 0 1 0 1 1 0 1 0 Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. |
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