AP602 WJ Communications, Inc., AP602 Datasheet - Page 3

• Manufacturer Part Number: AP602
• Description: High Dynamic Range 4w 28v Hbt Amplifier
• Manufacturer: WJ Communications, Inc.

WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: [phone] • e-mail: [e-mail] • Web site: www.wj.com, www.TriQuint.com
Following bias procedure is recommended to ensure proper functionality of AP602 in a laboratory environment. The sequencing is not
required in the final system application.
Turn-on Sequence:
Turn-off Sequence:
Notes:
Application Circuit PC Board Layout
PCB Material: 0.0147” Rogers Ultralam 2000, single layer, 1 oz Cu,
1.
2.
3.
4.
5.
1.
2.
3.
4.
1.
2.
3.
ε
r
= 2.45, Microstrip line details: width = .042”, spacing = .050”
Attach input and output loads onto the evaluation board.
Turn on power supply Vcc = +28V.
Turn on power supply Vbias = +5V. At this point, the only current drawn by the device is leakage current (< 25µA).
Turn on power supply Vpd = +5V. Power supply Vcc should now be drawing typical Icq = 80 mA.
Turn on RF power.
Turn off RF power.
Turn off power supply Vpd = +5V.
Turn off power supply Vbias = +5V.
Turn off power supply Vcc = +28V.
Icq can be adjusted with the resistor R2 from the Vpd (+5V) supply and the PIN_VPD (pin14) of the amplifier. Increasing R2
results in a lower Icq. Icq should not be increased above 160mA.
Vpd is used as a reference for the internal active bias circuitry. It can be used to turn on/off the amplifier. Ipd depends on the Icq
quiescent current setting. Ipd can be up to 4mA at a quiescent current setting of 160mA.
Vbias should be maintained fixed at +5V. Ibias will change based on RF input power level. It can be up to 4mA on the AP602.
AP602
High Dynamic Range 4W 28V HBT Amplifier
4
3
2
1
0
0
40
Evaluation Board Bias Procedure
Icq Setting (mA)
Ipd vs Icq
80
120
160
Vbias
Bias.
Vpd
Vcc
200
Notes:
1. Please note that for reliable operation, the evaluation board will have to be mounted to a much larger
2. The area around the module underneath the PCB should not contain any soldermask in order to
3. For proper and safe operation in the laboratory, the power-on sequencing is recommended.
Voltage (V)
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.
maintain good RF grounding.
4
3
2
1
0
22
+28
+5
+5
Output Average Power (dBm)
Ibias vs Output Power
24
Baseplate Configuration
26
Specifications and information are subject to change without notice
28
30
32
Page 3 of 11 May 2007 ver 1