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DATA SHEET
AS218-321, AS218-321LF: PHEMT GaAs IC High-Power
Transfer Switch 0.1–6 GHz
Applications
Pin Out (Top View)
●
WLAN 802.11a, b, g diversity
Features
●
Operating frequency 0.1–6 GHz
12
11
10
●
Positive low voltage control (0/3 V operation)
●
●
Low insertion loss
Available lead (Pb)-free and RoHS-compliant MSL-1 @ 250 °C
per JEDEC J-STD-020
GND
GND
V 1
4
5
6
GND
GND
V 2
Description
The AS218-321 is a broadband transfer switch designed to
combine T/R and antenna diversity switching functions on a
single IC. The device is designed to handle high power and
maintain high linearity at low control voltages. This low-cost
switch is ideal for Wi-Fi systems and is capable of covering
both the 2.4 and 5 GHz bands.
DC blocking capacitors (C BL ) required on RF ports.
C BL = 15 pF.
NEW
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
Electrical Specifications at 25 °C (0, 3 V)
Parameter (1, 4)
Condition
Frequency
Min.
Typ.
Max.
Unit
Insertion
loss (2)
Ant 1, Ant 2 to Tx, Rx
0.10–6.00 GHz
1.6
1.8
dB
2.40–2.50 GHz
5.15–5.85 GHz
1.2
1.4
1.4
1.6
dB
dB
Isolation
Return loss (3)
Ant 1, Ant 2 to Tx, Rx
Ant 1, Ant 2 to Tx, Rx
0.10–6.00 GHz
2.40–2.50 GHz
5.15–5.85 GHz
0.10–6.00 GHz
17
26
17
19
28
19
10
dB
dB
dB
dB
1. All measurements made in a 50 ? system.
2. Insertion loss changes by 0.003 dB/C.
2.40–2.50 GHz
5.15–5.85 GHz
3. Return loss for insertion loss state.
4. Tx and Rx paths can be used interchangeably.
15
20
dB
dB
Skyworks Solutions, Inc. ? Phone [781] 376-3000 ? Fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com
200082 Rev. D ? Skyworks Proprietary Information ? Products and Product Information are Subject to Change Without Notice. ? August 9, 2006
1
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