NJG1544HC3
2x2 Antenna SWITCH GaAs MMIC
GENERAL DESCRIPTION
NJG1544HC3 is a 2x2 antenna switch IC designed for the
IEEE 802.11b or 802.11g (2.4GHz band) wireless LAN
application.
This device includes logic decoder function, and can be
operated by 2 bits signal to control Tx/Rx and ANT1/ANT2
switching.
This switch features high isolation and low loss.
The ultra small & ultra thin USB10-C3 package is adopted.
FEATURES
Single low voltage control
Low insertion loss
High isolation
Handling power (TX port)
Low current consumption
Ultra small & ultra thin package
PIN CONFIGURATION
USB10-C3 Type
(TOP VIEW)
5
6
D
E
C
O
D
E
R
PACKAGE OUTLINE
NJG1544HC3
+2.5~+5.5V
0.35dB typ. @TX-ANT2,f=2.5GHz, P
IN
=20dBm
0.50dB typ. @RX-ANT1,RX-ANT2,f=2.5GHz, P
IN
=10dBm
23dB
typ. @f=2.5GHz, P
IN
=20dBm
28dBm max. @f=2.5GHz, V
DD
=2.7V
120uA typ. @f=2.5GHz
USB10-C3 (Package size: 1.5x2.0x0.75mm)
4
7
3
8
2
9
10
1
1
2
3
4
5
6
7
8
9
10
ANT1
CTL1
CTL2
ANT2
GND
TX
GND
VDD
RX
GND
TRUTH TABLE
"H"=VCTL(H) "L"=VCTL(L)
"X"="H" or "L" (Don't care)
PASS
RX-ANT2
RX-ANT1
TX-ANT2
CONTROL SIGNAL
CTL1
CTL2
L
L
L
H
H
X
-1-
NJG1544HC3
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Power
Supply Voltage
Control Voltage
Power Dissipation
Operating Temp.
Storage Temp.
SYMBOL
P
in
V
DD
V
CTL
P
D
T
opr
T
stg
CONDITIONS
TX, ANT2 Terminal, V
DD
=2.7V, V
CTL
=0/2.7V
RX, ANT1 Terminal, V
DD
=2.7V, V
CTL
=0/2.7V
V
DD
Terminal
CTL1, CTL2 Terminal
At on PCB board
RATINGS
30
25
7.5
7.5
135
-40~+85
-55~+125
UNITS
dBm
dBm
V
V
mW
°C
°C
ELECTRICAL CHARACTERISTICS
General conditions: V
DD
=2.7V, V
CTL
=0/2.7V, Z
S
=Z
l
=50Ω, T
a
=25°C
Tested on PCB circuit as shown below.
Insertion loss of each connectors, striplines, and capacitors are excluded.
PARAMETERS
Supply voltage
Operating current
Control voltage (LOW)
Control voltage (HIGH)
Control current
Insertion loss 1
Insertion loss 2
Isolation 1
Isolation 2
Pin at 1dB
compression point
VSWR
Switching time
SYMBOL
VDD
IDD
V
CTL (L)
V
CTL (H)
I
CTL
LOSS1
LOSS2
ISL1
ISL2
P
-1dB
VSWR
T
SW
f=2.5GHz
TX-ANT2, f=2.5GHz, P
IN
=20dBm
RX-ANT1, RX-ANT2, f=2.5GHz,
P
IN
=10dBm
TX-ANT2, f=2.5GHz, Pin=20dBm
RX-ANT1, RX-ANT2, f=2.5GHz,
Pin=10dBm
TX-ANT2, f=2.5GHz
f=0.1~2.5GHz, ON State
f=0.1~2.5GHz
f=2.5GHz
CONDITIONS
MIN
2.5
-
0
2.0
-
-
-
20
20
26
-
-
TYP
2.7
120
-
-
30
0.35
0.5
23
23
28
1.1
200
MAX
5.5
150
0.8
VDD
40
0.65
0.8
-
-
-
1.3
300
ns
UNITS
V
uA
V
V
uA
dB
dB
dB
dB
dBm
-2-
NJG1544HC3
TERMINAL INFORMATION
No.
1
2
3
4
5
6
7
8
SYMBOL
ANT1
CTL1
CTL2
ANT2
GND
TX
GND
VDD
DC voltage (V
DD
).
Control voltage input terminal. This terminal is set to High-Level (+2V~V
DD
) or
Low-Level (0~+0.8V).
Control voltage input terminal. This terminal is set to High-Level (+2V~V
DD
) or
Low-Level (0~+0.8V).
RF transmitting/receiving port. An external capacitor of 56pF is required to
block DC voltage (V
DD
) .
Ground terminal. Please connect this terminal with ground plane as close
as possible for excellent RF performance.
RF transmitting port. An external capacitor of around 56pF is required to
block DC voltage (V
DD
).
Ground terminal. Please connect this terminal with ground plane as close
as possible for excellent RF performance.
Positive voltage supply terminal. The positive voltage (+2.5~+5.5V) have to
be supplied. Please connect a bypass capacitor with GND terminal for
excellent RF performance.
RF receiving port. An external capacitor of around 56pF is required to block
DC voltage (V
DD
) .
Ground terminal. Please connect this terminal with ground plane as close
as possible for excellent RF performance.
DESCRIPTION
RF receiving port. An external capacitor of around 56pF is required to block
9
10
RX
GND
-3-
NJG1544HC3
ELECTRICAL CHARACTERISTICS
(f=0.1~3.0GHz, with Application circuit, Losses of external circuit are excluded)
RX-ANT2 Insertion Loss vs. Frequency
(RX-ANT2 ON, VDD=2.7V, Pin=0dBm)
0.0
0
RX-ANT2 Isolation vs. Frequency
(TX-ANT2 ON, VDD=2.7V, Pin=0dBm)
Insertion Loss (dB)
-10
-0.5
Isolation (dB)
-20
-1.0
-30
-1.5
-40
-2.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-50
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
RX-ANT1 Insertion Loss vs. Frequency
(RX-ANT1 ON, VDD=2.7V, Pin=0dBm)
0.0
0
RX-ANT1 Isolation vs. Frequency
(RX-ANT2 ON, VDD=2.7V, Pin=0dBm)
Insertion Loss (dB)
-10
-0.5
-20
-1.0
-30
-1.5
-40
-2.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-50
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
TX-ANT2 Insertion Loss vs. Frequency
(TX-ANT2 ON, VDD=2.7V, Pin=0dBm)
0.0
0
TX-ANT2 Isolation vs. frequency
(RX-ANT2 ON, VDD=2.7V, Pin=0dBm)
Insertion Loss (dB)
-10
-0.5
Isolation (dB)
0.5
1.0
1.5
2.0
2.5
3.0
-20
-1.0
-30
-1.5
-40
-2.0
0.0
-50
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
-4-
NJG1544HC3
ELECTRICAL CHARACTERISTICS
(f=0.1~3.0GHz, with Application circuit, Losses of external circuit are excluded)
RX-ANT2 VSWR vs. Frequency
(RX-ANT2 ON, ANT2 port, VDD=2.7V)
2.0
Switching Speed
(RX-ANT2 ON, VDD=2.7V)
1.8
VSWR
1.6
209ns
1.4
1.2
1.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
50ns/div
RX-ANT1 VSWR vs. Frequency
(RX-ANT1 ON, ANT1 port, VDD=2.7V)
2.0
Switching Speed
(RX-ANT1 ON, VDD=2.7V)
1.8
VSWR
1.6
192ns
1.4
1.2
1.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
50ns/div
TX-ANT2 VSWR vs. Frequency
(TX-ANT2 ON, TX port, VDD=2.7V)
2.0
Switching Speed
(TX-ANT2 ON, VDD=2.7V)
1.8
VSWR
1.6
189ns
1.4
1.2
1.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
50ns/div
-5-
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