WS1413
4 x 4 Power Amplifier Module for CDMA PCS
(1850 – 1910 MHz)
Data Sheet
Description
The WS1413, a Personal Communication Service
(PCS) Power Amplifier (PA), is a fully matched 10-pin
surface mount module developed for PCS and wire-
less local loop applications. This power amplifier
module operates in the 1850-1910 MHz bandwidth.
The WS1413 meets the stringent CDMA linearity
requirements up to 28 dBm output power.
A low current (Vcont) pin is provided for high effi-
ciency improvement of the low output power range.
The WS1413 features CoolPAM circuit technology
offering state-of-the-art reliability, temperature
stability and ruggedness.
The WS1413 is self contained, incorporating 50ohm
input and output matching networks.
Features
• High efficiency
• 10-pin surface mounting package (4 mm x 4 mm x
1.4 mm)
• Low power-state control
• Low quiescent current
• Internal 50Ω matching networks for both RF input
and output
• CDMA 95A/B, CDMA 2000-1X/EVDO
Applications
• Digital CDMA PCS
• Wireless Local Loop
Functional Block Diagram
Vcc1(1)
Vcc2(10)
Input
Match
RF Input (2)
DA
Inter
Stage
Match
PA
Output
Match
RF Output (8)
Bias Circuit & Control Logic
MMIC
MODULE
Vcont(4)
Vref(5)
Electrical Specifications
Table 1. Absolute Maximum Ratings
[1]
Parameter
RF Input Power
DC Supply Voltage
DC Reference Voltage
Storage Temperature
Symbol
P
in
V
cc
V
ref
T
stg
Min.
–
–
–
-55
Nominal
–
3.4
2.85
–
Max.
10.0
5.0
3.3
+125
Unit
dBm
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
V
cc
V
ref
V
cont
V
cont
Fo
Ta
Min.
3.2
2.75
–
–
1850
-30
Nominal
3.4
2.85
0
2.85
Max.
4.2
2.95
–
–
1910
Unit
V
V
V
V
MHz
°C
25
85
Table 3. Power Range Truth Table
Power Mode
High Power Mode
[3]
Low Power Mode
[3]
Shut Down Mode
[4]
Symbol
PR2
PR1
–
Vref
2.85
2.85
0.00
Vcont
[2]
Low
High
–
Range
~28 dBm
~18 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 (1.5 V– 3.0V), Low (0.0V – 0.5V).
3. To change between High Power Mode and Low Power Mode, switch Vcont accordingly.
4. In order to shut down the module, turn off Vref accordingly.
2
Electrical Specifications,
continued
Table 4. Electrical Characteristics for CDMA Mode (Vcc = 3.4V, Vref = 2.85V, T = 25°C)
Characteristics
Gain
Gain_low
PAE_hi
Power Added Efficiency
PAE_low
Icc_hi
Total Supply Current
Icc_low
Iq_hi
Quiescent Current
Iq_low
Iref_hi
Reference Current
Iref_low
Control Current
[1]
Total Current in Power-down Mode
ACPR in High power mode
ACPR in Low power mode
Harmonic Suppression
Input VSWR
Stability (Spurious Output)
Noise Power in RX Band
Ruggedness
Note:
1. Control current when series 6.2kohm is used.
1.25 MHz offset
1.98 MHz offset
1.25 MHz offset
1.98 MHz offset
Second
Third
Icont
Ipd
ACPR1_hi
ACPR2_hi
ACPR1_low
ACPR2_low
2fo
3fo
VSWR
S
RxBN
Ru
VSWR 6:1, All phase
Pout = 28 dBm
Pout<28 dBm, Pin<10.0 dBm
-136
Pout = 18.0 dBm
Pout = 18.0 dBm
Vref = 0.0V
Pout = 28.0 dBm
Pout = 28.0 dBm
Pout = 18.0 dBm
Pout = 18.0 dBm
Pout = 28.0 dBm
Pout = 28.0 dBm
4
0.18
0.2
-50
-60
-52
-60
-40
-55
2:1
8
1
5
-45
-56
-47
-56
-30
-40
2.5:1
-60
-132
10:1
mA
mA
µA
dBc
dBc
dBc
dBc
dBc
dBc
VSWR
dBc
dBm/Hz
VSWR
Low Power Mode
Pout = 28.0 dBm
7
13
3.5
22
7
mA
mA
Pout = 18.0 dBm
High Power Mode
45
65
65
80
90
mA
mA
Pout = 18.0 dBm
Pout = 28.0 dBm
22
27
465
500
%
mA
Pout = 18.0 dBm
Pout = 28.0 dBm
17
37
21
40
dB
%
Symbol
Gain_hi
Condition
Pout = 28.0 dBm
Min.
24
Typ.
27
Max.
Unit
dB
3
Characterization Data
(Vcc = 3.4V, Vref = 2.85V, T = 25°C, Fo = 1880 MHz)
500
450
400
350
300
250
200
150
100
50
0
-10
30
25
GAIN (dB)
-5
0
5
10
Pout (dBm)
15
20
25
30
ICCT (mA)
20
15
10
5
0
-10
-5
0
5
10
Pout (dBm)
15
20
25
30
Figure 1. Total Current vs. Output Power.
Figure 2. Gain vs. Output Power.
45
40
35
ACPR1 (dBc)
-40
-45
-50
-55
-60
-65
-70
-75
30
PAE (%)
25
20
15
10
5
0
-10
-5
0
5
10
15
20
25
30
-80
-10
-5
0
5
10
15
20
25
30
Pout (dBm)
Pout (dBm)
Figure 3. Power Added Efficiency vs. Output Power.
Figure 4. Adjacent Channel Power Ratio 1 vs. Output Power.
-40
-45
HARMONIC (dBc)
-20
-30
-40
-50
-60
-70
-50
ACPR2 (dBc)
2fo
3fo
-55
-60
-65
-70
-75
-80
-10
-5
0
5
10
15
20
25
30
-80
-10
-5
0
5
10
Pout (dBm)
15
20
25
30
Pout (dBm)
Figure 5. Adjacent Channel Power Ratio 2 vs. Output Power.
Figure 6. Harmonic Suppression vs. Output Power
(Digital Mode).
4
Evaluation Board Description
Vcc1
C4
2.2
µF
RF In
Vcont
Vref
R1
6.2kohm
4 Vcont
C2
100pF
5 Vref
C1
100pF
GND 6
GND 7
1 Vcc1
C3
100pF
2 RF In
3 GND
GND 9
RF Out 8
Vcc2 10
C5
1000 pF
Vcc2
C6
2.2
µF
RF Out
Figure 7. Evaluation Board Schematic.
C4
C3
Agilent
WS1413
PYYWW
AAAAA
C6
C5
C2
R1
C1
Figure 8. Evaluation Board Assembly Diagram.
5
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