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Specifications subject to change without notice. 3/99A
GaAs IC Receive Diversity
T/R Switch DC–2 GHz
Features
■PDC Antenna Switch
■Transmit to Main Antenna
■Receive from Dual Antenna Ports
■Operates with Positive, Negative or
Differential Voltages
■Low DC Power Consumption
MSOP-8
AS149-59
Description
The AS149-59 is a GaAs MMIC T/R Switch with receive
diversity ideal for use in PDC handsets and low power
base stations. It can be operated with positive or negative
3 V or differential biasing for high linearity. The switch is
packaged in a low cost, miniature MSOP-8 package.
On Path Parameter1Frequency2Min. Typ. Max. Unit
TXto M-Ant. Insertion Loss3DC–1.0 GHz 0.35 0.5 dB
DC–2.0 GHz 0.50 0.7 dB
RXto M-Ant. Iso. DC–1.0 GHz 23 26 dB
DC–2.0 GHz 15 19 dB
RXto M-Ant. Insertion Loss DC–1.0 GHz 0.65 0.8 dB
DC–2.0 GHz 0.9 1.1 dB
TXto M-Ant. Iso. DC–1.0 GHz 15 18 dB
DC–2.0 GHz 9 12 dB
RXto S-Ant. Iso. DC–1.0 GHz 20 23 dB
DC–2.0 GHz 12 15 dB
RXto S-Ant. Insertion Loss DC–1.0 GHz 0.5 0.6 dB
DC–2.0 GHz 0.9 1.1 dB
TXto M-Ant. Iso. DC–1.0 GHz 20 24 dB
DC–2.0 GHz 12 15 dB
VSWR4DC–1.0 GHz 1.5:1
DC–2.0 GHz 1.7:1
Electrical Specifications at 25°C (-2.75, +2.75 V)
0.012 (0.30 mm)
PIN 1
PIN 1
INDICATOR
+ 0.006 (0.15 mm)
7.0˚
TYP.
0.038 (0.95 mm)
0.030 (0.75 mm) 0.017
(0.43 mm) 8.0˚
MAX.
0.028 (0.70 mm)
0.016 (0.40 mm)
0.007 (0.18 mm)
± 0.005 (0.12 mm)
0.006 (0.15 mm)
0.002 (0.05 mm)
- 0.002 (0.05 mm)
0.0256 (0.65 mm) TYP.
0.118 (3.00 mm)
± 0.004 (0.1 mm)
SQ.
0.193 (4.90 mm)
REF.
1. All measurements made in a 50 Ωsystem, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/°C.
4. Insertion loss state.
GaAs IC Receive Diversity T/R Switch DC–2 GHz AS149-59
2Skyworks Solutions, Inc. [978] 241-7000 •Fax [978] 241-7906 •Email sales@skyworksinc.com •www.skyworksinc.com
Specifications subject to change without notice. 3/99A
Frequency (GHz)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 0.5 1.50.750.25 1.0 1.25 1.75 2.0
Insertion Loss vs. Frequency
dB
RX to
M-Ant.
RX to
S-Ant.
TX to
M-Ant.
Frequency (GHz)
0 0.5 1.0 1.5 2.0
40
30
20
10
0
RX to M-Ant. Isolation vs. Frequency
dB
On Path:
TX to
M-Ant.
Frequency (GHz)
0 0.5 1.0 1.5 2.0
TX to M-Ant. and RX to S-Ant.
Isolation vs. Frequency
dB
On Path:
RX to
M-Ant.
50
40
30
20
10
0
Tx to M-Ant.
Rx to S-Ant.
Frequency (GHz)
0 0.5 1.0 1.5 2.0
40
30
20
10
0
RX to M-Ant. Isolation vs. Frequency
dB
On Path:
RX to
S-Ant.
Typical Performance Data (-2.75, +2.75 V)
Parameter1Condition Frequency Min. Typ. Max. Unit
Switching Characteristics Rise, Fall Time 75 ns
On, Off Time 150 ns
Input Power for 1 dB Compression TXto M-Ant 0.9 GHz +38 dBm
RXto M-Ant. +33 dBm
RXto S-Ant. +33 dBm
Intermodulation Intercept Point For Two-tone Input Power at +13 dBm 0.9 GHz
TXto M-Ant +49 dBm
RXto M-Ant. +48 dBm
Adjacent Channel Power Performance TXto M-Ant. (PDC Standard,
30 dBm Input, 100 kHz Detune) +69 dBm
Harmonic Channel Power Performance 30 dBm Input 0.9 GHz
2nd Harmonic +67 dBc
3rd Harmonic +82 dBc
Control Voltages VLow = -2.8 V ≤VLow ≤-4.8 V, 500 µA Max.
VHigh = -0.2 V ≤VHigh ≤+3.2 V, 500 µA Max.
Differential = +2.6 V ≤(VHigh – VLow) ≤+8 V
1. All measurements made in a 50 Ωsystem, unless otherwise specified.
Operating Characteristics at 25°C (-2.75, +2.75 V)
Skyworks Solutions, Inc. [978] 241-7000 •Fax [978] 241-7906 •Email sales@skyworksinc.com •www.skyworksinc.com 3
Specifications subject to change without notice. 3/99A
GaAs IC Receive Diversity T/R Switch DC–2 GHz AS149-59
Characteristic Value
RF Input Power 6 W > 500 MHz, 0/-10 V
Positive Voltage Differential Bias 3 V ≤(VHigh – VLow) ≤10.0 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
ΘJC 25°C/W
Absolute Maximum Ratings
Note: Exceeding these parameters may cause irreversible damage.
V1V2V3TXM-Ant. RXM-Ant. RXS-Ant.
VHigh VLow VLow Insertion Isolation Isolation
Loss
VLow VHigh VLow Isolation Insertion Isolation
Loss
VLow VLow VHigh Isolation Isolation Insertion
Loss
Truth Table
Pin Out
VLow = -2.8 to -4.8 V.
VHigh = -0.2 to +3.2 V.
DC blocking (CBL) and bypass (CBP) capacitors must be supplied externally
only if VHigh > 0 V.
CBL = 100 pF, CBP = 1000 pF for operation >500 MHz.
RX
TX
V3
V2
V1
GND
S-Ant.
M-Ant.
12 34
87 65
CBL
CBP
CBL
CBL
CBL
