WS1103
CDMA Cell 3x3 Power Amplifier Module
(824-849 MHz)
Data Sheet
Description
The WS1103 is a CDMA(Code Division Multiple Access)
power amplifier module designed for handsets operat-
ing in the 824-849 MHz bandwidth.
The WS1103 features CoolPAM circuit technology that
offers state-of-the-art reliability, temperature stability
and ruggedness.
Digital mode control of CoolPAM reduces current
consumption, which enables extended talk time of
mobile devices.
The WS1103 meets stringent CDMA linearity
requirements to and beyond 28 dBm output power. The
3 mm x 3 mm form factor 8-pin surface mount package is
self contained, incorporating 50 ohm input and output
matching networks.
Features
•
Excellent linearity
•
Low quiescent current
•
High efficiency
PAE at 28 dBm: 41.2%
PAE at 16 dBm: 17.7%
•
8-pin surface mounting package
3 mm x 3 mm x 1.0 mm
•
Internal 50 ohm matching networks for both RF input
and output
•
RoHS compliant
Applications
•
Digital CDMA Cellular
•
Wireless local loop
Order Information
Part Number
WS1103-TR1
No. of Devices
1,000
100
Container
7” Tape and Reel
BULK
Functional Block Diagram
Vcc1 (1)
Vcc2 (8)
WS1103-BLK
RF
INPUT
(2)
INPUT
MATCH
DA
INTER
STAGE
MATCH
PA
OUTPUT
MATCH
RF
OUTPUT
(7)
BIAS CIRCUIT & CONTROL LOGIC
MMIC
MODULE
Vcont (3)
Vref (4)
Table 1. Absolute Maximum Ratings
[1]
Parameter
RF Input Power
DC Supply Voltage
Reference Voltage
Control Voltage
Storage Temperature
Symbol
Pin
Vcc
Vref
Vcont
Tstg
Min.
–
0
0
0
-55
Nominal
–
3.4
2.85
2.85
–
Max.
10.0
5.0
3.3
3.3
+125
Unit
dBm
V
V
V
°C
Table 2. Recommended Operating Conditions
Parameter
DC Supply Voltage
DC Reference Voltage
Mode Control Voltage
– High Power Mode
– Low Power Mode
Operating Frequency
Ambient Temperature
Symbol
Vcc
Vref
Vcont
Vcont
Fo
Ta
Min.
3.2
2.75
0
2.0
824
-30
Nominal
3.4
2.85
0
2.85
25
Max.
4.2
2.95
0.5
3.0
849
85
Unit
V
V
V
V
MHz
°C
Table 3. Power Range Truth Table
Power Mode
High Power Mode
Low Power Mode
Shut Down Mode
Symbol
PR2
PR1
–
Vref
2.85
2.85
0
Vcont
[2]
Low
High
-
Range
~ 28 dBm
~ 16 dBm
–
Notes:
1. No damage assuming only one parameter is set at limit at a time with all other parameters set at or below nominal value.
2. High (2.0 – 3.0 V), Low (0.0 V – 0.5 V).
2
Table 4. Electrical Characteristics for CDMA Mode (Vcc = 3.4 V, Vref = 2.85 V, T = 25°C, Zin/Zout = 50 ohm)
Characteristics
Operating Frequency Range
Gain
Power Added Efficiency
Total Supply Current
Quiescent Current
Reference Current
Control Current
Total Current in Power-Down
Mode
900 kHz offset
Adjacent
Channel
Power Ratio
Harmonic
Suppression
Input VSWR
Stability (Spurious Output)
Noise Power in Rx Band
Ruggedness
1.98 MHz offset
900 kHz offset
1.98 MHz offset
Second
Third
Symbol
F
Gain_hi
Gain_low
PAE_hi
PAE_ low
Icc_hi
Icc_ low
Iq_hi
Iq_ low
Iref_hi
Iref_low
Icont
Ipd
ACPR1_hi
ACPR2_hi
ACPR1_ low
ACPR2_ low
2f0
3f0
VSWR
S
RxBN
Condition
High Power Mode, Pout =28 dBm
Low Power Mode, Pout = 16 dBm
High Power Mode, Pout = 28 dBm
Low Power Mode, Pout = 16 dBm
High Power Mode, Pout = 28 dBm
Low Power Mode, Pout = 16 dBm
High Power Mode
Low Power Mode
High Power Mode, Pout = 28 dBm
Low Power Mode, Pout = 16 dBm
Low Power Mode, Pout = 16 dBm
Vref = 0 V
High Power Mode, Pout = 28 dBm
Low Power Mode, Pout = 16 dBm
High Power Mode, Pout = 28 dBm
Min.
824
24
14
36
13.6
Typ.
–
29.5
17.5
41.2
17.7
450
65
93
13
2
3
0.2
0.2
-55
-59
-59
-66
-39
-56
2:1
Max.
849
Unit
MHz
dB
dB
%
%
515
85
125
25
7
8
1
5
-47
-57
-47
-57
-30
-40
2.5:1
-60
mA
mA
mA
mA
mA
mA
mA
µA
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBm/Hz
VSWR
VSWR 6:1, All Phase
-136.5
No Damage
Pout <28 dBm, Pin <10 dBm, All Phase
High Power Mode
-132
10:1
Ru
3
Characteristics Data (Vcc = 3.4 V, Vref = 2.85 V, T = 25°C, Zin/Zout = 50 ohm)
500
450
400
350
Current (mA)
300
250
200
150
100
50
0
0
5
10
15
Pout (dBm)
20
25
30
10
0
5
10
15
Pout (dBm)
20
15
824 MHz
836.5 MHz
Gain (dB)
849 MHz
25
20
824 MHz
836.5 MHz
849 MHz
25
30
30
35
Figure 1. Total current vs. output power
Figure 2. Gain vs. output power
45
40
35
ACPR1 (dBc)
30
PAE (%)
25
20
15
10
5
0
0
5
10
15
Pout (dBm)
20
824 MHz
836.5 MHz
849 MHz
25
30
-40
-45
-50
-55
-60
-65
-70
-75
0
5
10
15
Pout (dBm)
20
824 MHz
836.5 MHz
849 MHz
25
30
Figure 3. Power added efficiency vs. output power
Figure 4. Adjacent channel power ratio 1 vs. output power
-45
-50
-55
ACPR2 (dBc)
-60
-65
-70
-75
-80
-85
0
5
10
15
Pout (dBm)
20
824 MHz
836.5 MHz
849 MHz
25
30
Figure 5. Adjacent channel power ratio 2 vs. output power
4
Evaluation Board Description
Vcc1
C4
4.7uF
RF In
2 RF In
Vcont
R1
0 ohm
C2
100pF
Vref
C3
100pF
3 Vcont
GND 6
RF Out 7
RF Out
1 Vcc1
Vcc2 8
C1
330pF
C5
4.7uF
Vcc2
4 Vref
GND 5
Figure 6. Evaluation board schematic
1103
PYYWW
AAAAA
Figure 7. Evaluation board assembly diagram
5
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