CXG1028ATN
10 pin TSSOP (Plastic)
E98527-PS
GSM900/1800/1900 SPDT TX/RX Switch
Description
The CXG1028ATN is a high power SPDT switch
suitable for Digital Cellular applications. This device
is part of a growing family of MMIC Antenna switches
for digital cellular and cordless radios. It uses the
state-of-the-art Sony GaAs JFET process.
Features
Positive voltage supply only
Low insertion loss, typically 0.3dB at
34.5dBm, 900MHz
Low Harmonics: 64.5dBc Max. at 34.5dBm
(Vctl = 5V, 25C)
Stable Characteristics over wide temperature range
Fast switching-100ns Typical
Low current consumption, 190A typical at 5V
10 pin TSSOP package (3.2
2.8mm)
Applications
GSM900 handportable applications
GSM1800 handportable
GSM1900 handportable
GSM900/1800/1900 Base station
Other digital cellular and wireless local loop
applications
Typical Application
ESD
As with other GaAs semiconductors, ESD precautions
must be adhered to.
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
TX IN
RX OUT
CXG1028ATN
PA
LNA
Internal
Antenna
1
2
CXG1028ATN
Electrical Characteristics
Measurement Conditions, unless otherwise stated:Ta = 25C.
CW
Parameter
Insertion loss
Isolation
VSWR
Output Harmonics
Input Power for 0.2dB Compression
Input Power for 1dB Compression
Switching Speed TSW
Control Current
20
36
35
0.3
0.5
22
17
1.2
35
36
35
38
37
100
190
0.6
0.8
30
350
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
ns
A
Min.
Typ.
Max.
Unit
Control Voltage Selection, Vctl (H)
The choice of control voltage will determine the compression characteristic of the switch and the generation of
harmonics. The table above indicates P0.2dB, P1dB. The graphs below indicate the sensitivity of harmonic
levels:
2nd Harmonic with Power/Control Volts
80
70
60
50
40
32
33
34
35
36
Input power [dBm]
H
a
r
m
o
n
i
c
l
e
v
e
l
[
d
B
c
]
Vctl = 0/3V
Vctl = 0/3.5V
Vctl = 0/4V
Vctl = 0/4.5V
Vctl = 0/5V
Condition
Symbol
1
,
3
2
,
4
1
,
3
2
,
4
1
2
1
2
1
2
IL
ISO
VSWR
2fo,3fo
P0.2dB
P1dB
TSW
ICTL
1
Pin = 34.5dBm, 880 to 915MHz, 0/5V Control
2
Pin = 32dBm, 1710 to 1785MHz, 0/5V Control
3
Pin = 10dBm, 925 to 960MHz, 0/3V Control
4
Pin = 10dBm, 1805 to 1880MHz, 0/3V Control
3rd Harmonic with Power/Control Volts
90
80
70
60
50
40
30
20
32
33
34
35
36
Input power [dBm]
H
a
r
m
o
n
i
c
l
e
v
e
l
[
d
B
c
]
Vctl = 0/3V
Vctl = 0/3.5V
Vctl = 0/4V
Vctl = 0/4.5V
Vctl = 0/5V
3
CXG1028ATN
Compression Characteristics
Measurement Conditions: Vctl (L) = 0V, Ta = 25C
0
2
4
6
20
24
28
32
36
40
15
10
5
0
V
CTL
(H) = 5V
V
CTL
(H) = 4V
V
CTL
(H) = 3V
V
CTL
(H) = 3V
V
CTL
(H) = 4V
V
CTL
(H) = 5V
Input power (dBm)
I
s
o
l
a
t
i
o
n
(
d
B
)
I
n
s
e
r
t
i
o
n
l
o
s
s
(
d
B
)
Insertion loss, isolation vs. Input power
Insertion loss
Isolation
Frequency Characteristics
Measurement Conditions: Vctl (L) = 0V, Vctl (H) = 5V, Pin = 0dBm CW, Ta = 25C
0
3
4
5
2
1
30
20
10
0
40
50
0
1
2
3
Insertion loss, isolation vs. Frequency
Frequency (GHz)
I
s
o
l
a
t
i
o
n
(
d
B
)
I
n
s
e
r
t
i
o
n
l
o
s
s
(
d
B
)
Isolation
Insertion loss
4
CXG1028ATN
Schematic/Pinout
10pin TSSOP (PLASTIC)
CTLB
Port1
GND
CTLA
GND
Port3
GND
GND
Port2
GND
1
10
Pin No.
1
2
3
4
5
6
7
8
9
10
CONTROL B
GROUND
RF PORT1
GROUND
CONTROL A
RF PORT2
GROUND
GROUND
GROUND
RF PORT3
FUNCTION
Block Diagram/Truth Table
Port1
Port2
Port3
External Circuitry
CTLA
CTLB
Port3
Port2
CXG1028ATN
6
7
8
9
10
Port1
1
2
3
4
5
Rrf
100k
C1
100pF
Rctl
1k
C2
100pF
Rctl
1k
C1
100pF
C2
100pF
C2
100pF
Rrf
100k
When using the CXG1028ATN, the following external components should be used:
C
1
:
This is used for signal line filtering 100pF is recommended.
C
2
:
This is used for RF De-coupling and must be used in all applications. 100pF is recommended.
Rrf:
This resistor is used to stabilize the dc operating point at high power levels. A value of 100k
is
recommended.
Rctl: This resistor is used to reduce the current consumption or to give improved ESD performance.
V
CTLA
High
Low
V
CTLB
Low
High
Port1-Port2 ON
Port1-Port3 OFF
Port1-Port2 OFF
Port1-Port3 ON
5
CXG1028ATN
ESD Precautions
As this is a GaAs MMIC, ESD precautions must be adhered to, as outlined in sony's standard Data Book.
Please contact Sony if detailed ESD performance data is required.
Tape and Reel Information
This device is available in Tape and Reel. Order CXG1028ATN-T2
Reel Quantity: 1000 pieces/reel
Reel Dimensions: 254mm Plastic reel. 12mm width embossed taping.
Absolute Maximum Ratings (Ta = 25C)
Control voltage
Vctl
6
V
Control Current
Ictl
2
mA
Operating temperature
Topr
35 to +85
C
Storage temperature
Tstg
65 to +150
C
Input Power Pin 38
dBm
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