RMBA19500A-58 Raytheon RF Components, RMBA19500A-58 Datasheet - Page 4

• Manufacturer Part Number: RMBA19500A-58
• Description: Circuit Description = PCS1900 2 Watt GAAS Mmic Power Amplifier ;; Frequency = 1930-1990 MHZ
• Manufacturer: Raytheon RF Components

RF Components
www.raytheonrf.com
board (RMBA19500A-
(RMBA19500A-58-TB,
Test Procedure
for the evaluation
Evaluation Board
Layout of Test
G655971)
Figure 4
58-TB)
CAUTION: LOSS OF GATE VOLTAGES (Vg1, Vg2, Vg3) WHILE CORRESPONDING DRAIN
VOLTAGES (Vdd) ARE PRESENT CAN DAMAGE THE AMPLIFIER.
The following sequence must be followed to properly test the amplifier. (It is necessary to add a fan to
provide air cooling across the heat sink of RMBA19500A.)
J1
RF Input
Step 1: Turn off RF input power.
Step 2: Use GND terminal of the evaluation
Step 3: Slowly apply drain supply voltages of +5
Step 4: Adjust Vgg3 up from -3V until the drain
Specifications are based on most current or latest revision.
Revised June 27, 2003
RMBA19500A-58
PCS1900 2 Watt GaAs MMIC Power Amplifier
board for the ground of the DC supplies.
Set Vgg1, 2 and Vgg3 to -4V (pinch-off).
V to the board terminal Vdd ensuring that
there is no short.
current (with no RF applied) increases to
Idq3 as per supplied result sheet. Then
adjust Vgg1, 2 until the total drain current
becomes equal to the sum of Idq1, 2 and
Idq3.
GND Vg1,2 GND
GND
Page 4
HS (Heat-sink is attached
under base of RMBA19500A-58)
Step 5: After the bias condition is established,
Step 6:
Vg3
GND
RF input signal may now be applied at
the appropriate frequency band and
appropriate power level.
(i) Turn off RF Input Power
(ii) Turn down and off drain voltage
Vdd.
(iii) Turn down and off gate voltages
Vgg1, 2 and Vgg3.
Follow turn-off sequence of:
Vdd
G655971
PRODUCT INFORMATION
Raytheon RF Components
Andover, MA 01810
362 Lowell Street
J2
RF
Output