<For Europe and America>
CXG1017N
8 pin SSOP (Plastic)
GSM1800/1900 DPDT TX/RX Antenna Switch
Description
The CXG1017N is a high power DPDT 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 JFET process.
Features
•
Positive voltage supply only
•
Low insertion loss, typically 0.7dB at 33dBm input
level
•
Stable Characteristics over wide temperature range
•
Fast switching-100ns Typical
•
Low current consumption, 400µA typical at 5.5V
•
8 pin SSOP package (3.0
×
6.4mm)
Applications
•
GSM1800 handportable
•
GSM1900 handportable
•
DECT basestation/handportable diversity antenna
switching
•
Other digital cellular and wireless local loop
applications
Typical Application
Internal
Antenna
ESD
As with other GaAs semiconductors, ESD precautions
must be adhered to.
PA
TX IN
CXG1017N
External
Antenna
RX OUT
LNA
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.
–1–
E97756A79
<For Europe and America>
CXG1017N
Electrical Characteristics
Measurement Conditions, unless otherwise stated: Vctl (L) = 0V, Vctl (H) = 5.5V,
Pin = 33dBm GSM Burst (577µs pulse length with 8:1 Duty cycle), F = 1.75GHz. Temperature Range –25 to +75°C.
Parameter
Insertion loss
Isolation
VSWR
Switching time
Harmonic levels
Control currents
P0.1dB
P0.3dB
P0.1dB for Vctl (H) = 4.5V
P0.1dB for Vctl (H) = 3.0V
100
–56
400
34.5
35.5
34
29
–50
800
14
Min.
Typ.
0.7
16
1.5
ns
dBc
µA
dBm
dBm
dBm
dBm
Max.
0.95
Unit
dB
dB
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 the sensitivity of P0.1dB to control voltage, whilst the graphs below
indicate the sensitivity of harmonic levels:
2nd Harmonic with Power/Control Volts
–20
–30
–40
–50
–60
–70
30
31
32
33
34
35
36
37
38
Input power [dBm]
–20
–30
–40
–50
–60
–70
3nd Harmonic with Power/Control Volts
Harmonic level [dBc]
Harmonic level [dBc]
Vctl = 0/3V
Vctl = 0/4.5V
Vctl = 0/5.5V
Vctl = 0/3V
Vctl = 0/4.5V
Vctl = 0/5.5V
30
31
32
33
34
35
36
37
38
Input power [dBm]
–2–
<For Europe and America>
CXG1017N
Compression Characteristics
Measurement Conditions: Vctl (L) = 0V, Vctl (H) = 5.5V, GSM Burst, F = 1.75GHz
Temperature range –25 to +75°C.
Typical Characteristics over Temperature:
3.0
2.5
Insertion loss [dB]
2.0
1.5
1.0
0.5
0
30
31
–25°C
25°C
75°C
32
33
34
35
36
37
38
Input power [dBm]
Frequency Characteristics
Measurement Conditions: Vctl (L) = 0V, Vctl (H) = 5.5V, Pin = 0dBm CW, T = 25°C
Insertion Loss and Isolation vs. Frequency
0
Insertion loss
–1
–10
0
Insertion loss [dB]
–2
Isolation
–3
–20
–30
–4
–40
–5
0
1
2
3
Frequency [GHz]
–50
–3–
Isolation [dB]
<For Europe and America>
CXG1017N
Schematic/Pinout
Pin No.
Port1
CTLA
GND
Port2
1
2
3
4
8
7
6
5
Port4
CTLB
GND
Port3
FUNCTION
RF PORT1
Ctl (A)
GROUND
RF PORT2
RF PORT3
GROUND
Ctl (B)
RF PORT4
1
2
3
4
8pin SSOP (PLASTIC)
5
6
7
8
Block Diagram/Truth Table
V
CTLA
Port1
Port4
V
CTLB
Low
High
Port1-Port2, Port3-Port4 ON
Port2-Port3, Port4-Port1 OFF
Port2-Port3, Port4-Port1 ON
Port1-Port2, Port3-Port4 OFF
High
Low
Port2
Port3
Note)
Internal and External Antenna Connections should be
diagonally opposite (1-3, 2-4).
External Circuitry
C2
100pF
Port1
R
RF
75kΩ
D1
C2
100pF
Port2
C1
100pF
1
8
C2
100pF
Port4
optional
→
2
7
C1
100pF
C2
100pF
D1
→
optional
3
6
4
5
R
RF
75kΩ
Port3
When using the CXG1017N, 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 75kΩ is
recommended.
D
1
: 6.2V Zenor diodes may be incorporated at the Control lines, as indicated, in order to give improved
ESD performance if necessary.
–4–
<For Europe and America>
CXG1017N
ESD Precautions
As this is a GaAs MMIC, ESD precautions must be adhered to, as outlined in at standard Data Book.
Please contact Sony if detailed ESD performance data is required.
Configuration of External Logic Circuitry
For most portable appplicaitons, the following logic states are normally available.:
1. TX ON/OFF
2. RX ON/OFF
3. INT/EXT ANT.
A simple Logic circuit, using EXOR gates may be used to drive the CXG1017N. The following is a suggested
schematic:
A = TX ON/OFF
B = INT/EXT ANT
Assumed
Port1 : INT ANT
Port2 : RX LNA
Port3 : EXT ANT
Port4 : TX PA
TX ON/OFF
INT/EXT ANT
RX ON/OFF
CTLA
CTLB
Absolute Maximum Ratings
(Ta = 25°C)
•
Control voltage
Vctl
7
•
Operating temperature Topr
–30 to +85
•
Storage temperature
Tstg
–65 to +150
•
Input Power
Pin
37
V
°C
°C
dBm
Tape and Reel Information
This device is available in Tape and Reel. Order CXG1017N-T4
Reel Quantity: 1000 pieces/reel
Reel Dimensions: 245mm. There are detailed on Page 1-112 of the package manual 93.
–5–
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