Specifications and information are subject to change without notice

WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com

Page 2 of 5 April 2007

AP504

DCS-band 4W HBT Amplifier Module

Performance Graphs – Class AB Configuration (AP504-PCB)

The AP504-PCB and AP504 module is configured for Class AB by default. The resistor – R7 – which sets the current draw for

the amplifier is set at 0

in this configuration. Increasing that value will decrease the quiescent and operating current of the

amplifier module, as described on the next page.

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

device.

The use of a convection fan is also recommended in

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:

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

+25 °C, 12Vcc, Icq=850mA

28

29

30

31

32

33

1700

1720

1740

1760

1780

1800

Frequency (MHz)

Return Loss

+25 °C, Vcc=12V, Icq=850mA

-25

-20

-15

-10

-5

0

1700

1720

1740

1760

1780

1800

Frequency (MHz)

S11

S22

Gain vs. Temp

1765 MHz, Vcc=12V, Icq=850mA

26

28

30

32

34

36

-40

-20

0

20

40

60

80

Temperature (°C)

ACPR vs. Output Power vs. Temp

CDMA2000 SR1, 7

FA , fc=1765 MHz, ∆∆∆∆f=±885 kHz, Vcc=12V, Icq=850mA

-70

-65

-60

-55

-50

18

20

22

24

26

28

Total Output Power (dBm)

-40 °C

+25 °C

+85 °C

ACPR vs. Output Power vs. Temp

CDMA2000 SR1, 7

FA , fc=1765 MHz, ∆∆∆∆f=±1.98 MHz, Vcc=12V, Icq=850mA

-70

-65

-60

-55

-50

18

20

22

24

26

28

Total Output Power (dBm)

-40 °C

+25 °C

+85 °C

ACPR vs. Frequency vs. Temp

CDMA2000 SR1, 7FA , ∆∆∆∆f=±885 kHz, 25 dBm Pout, Vcc=12V, Icq=850mA

-70

-65

-60

-55

-50

1750

1760

1770

1780

Frequency (MHz)

-40 °C

+25 °C

+85 °C

DNP

DNP

DNP

DNP

DNP

DNP

DNP

DNP

DNP

0

0

0

0

10µF

.01µF

.01µF

100pF

100pF

6

5

4

2

3

1

RF IN

RF OUT