The Communications Edge TM
AP503
DCS-band 4W HBT Amplifier Module
Product Information
Performance Graphs – Class AB Configuration (AP503-PCB)
The AP503-PCB and AP503 module is configured for Class AB by default. The resistor – R7 – which sets the current draw for
the amplifier is set at 0 Ω in this configuration. Increasing that value will decrease the quiescent and operating current of the
amplifier module, as described on the next page.
10μF
DNP
0Ω
0Ω
DNP
DNP
100pF
.01μF
DNP
DNP
.01μF
100pF
Notes:
1. Please note that for reliable operation, the evaluation board will have
to be mounted to a much larger heat sink during operation and in
laboratory environments to dissipate the power consumed by the
RF IN
RF OUT
DNP
device. The use of
a convection fan is also recommended in
0Ω
0Ω
laboratory environments. Details of the mounting holes used in the
WJ heatsink are given on the last page of this datasheet.
2. The area around the module underneath the PCB should not contain
any soldermask in order to maintain good RF grounding.
3. For proper and safe operation in the laboratory, the power-on
sequencing should be followed:
DNP
DNP
DNP
6
5
4
3
2
1
1. Connect RF In and Out
2. Connect the voltages and ground pins as shown in the circuit.
3. Apply the RF signal
4. Power down with the reverse sequence
Gain
Return Loss
+25 °C, Vcc=12V, Icq=850mA
Gain vs. Temp
1855 MHz, Vcc=12V, Icq=850mA
+25 °C, 12Vcc, Icq=850mA
36
0
33
32
31
30
29
28
34
32
30
28
26
-5
-10
-15
-20
-25
S11
S22
-40
-20
0
20
40
60
80
1800
1820
1840
1860
1880
1900
1800
1820
1840
1860
1880
1900
Temperature (°C)
Frequency (MHz)
Frequency (MHz)
ACPR vs. Output Power vs. Temp
ACPR vs. Output Power vs. Temp
ACPR vs. Frequency vs. Temp
CDMA2000 SR1, 7FA , fc=1855 MHz, Δf=±885 kHz, Vcc=12V, Icq=850mA
CDMA2000 SR1, 7FA , fc=1855 MHz, Δf=±1.98 MHz, Vcc=12V, Icq=850mA
CDMA2000 SR1, 7FA , Δf=±885 kHz, 25 dBm Pout, Vcc=12V, Icq=850mA
-50
-50
-55
-60
-65
-70
-50
-55
-60
-65
-70
-40 °C
+25 °C
+85 °C
-40 °C
+25 °C
+85 °C
-40 °C
+25 °C
+85 °C
-55
-60
-65
-70
18
20
22
24
26
28
18
20
22
24
26
28
1840
1850
1860
1870
Total Output Power (dBm)
Total Output Power (dBm)
Frequency (MHz)
Specifications and information are subject to change without notice
Page 2 of 5 February 2006
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com
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