MGA-72543-TR1 Avago Technologies US Inc., MGA-72543-TR1 Datasheet - Page 18

• Manufacturer Part Number: MGA-72543-TR1
• Description: IC,Microwave/Millimeter Wave Amplifier,GAAS,SOT-343R,PLASTIC
• Manufacturer: Avago Technologies US Inc.

Specifications of MGA-72543-TR1

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Other currents can be set by positioning the DIP switch
to the bypass state and adding an external bias resistor to
Vcon. Unless an external resistor is used to set the current,
the Vcon terminal is left open. DC blocking capacitors are
provided for the both the input and output.
The 2-pin, 0.100” centerline single row headers attached
to the Vd and Vcon connections on the PCB provide a
convenient means of making connections to the board
using either a mating connector or clip leads.
A Note on Performance
Actual performance of the MGA-72543 as measured in
an evaluation circuit may not exactly match the data
sheet specifications. The circuit board material, passive
components, RF bypasses, and connectors all introduce
losses and parasitics that degrade device performance.
For the evaluation circuit above, fabricated on 0.031-inch
thick GETEK
losses of about 0.3 dB would be expected at both the input
an output sides of the RFIC at 1900 MHz. Measured noise
figure (3 volts, 20 mA bias) would then be approximately
1.8 dB and gain 13.8 dB.
Figure 13. Completed Amplifier with Component Reference Designators.
18
[1]
G200D (εr = 4.2) dielectric material, circuit
IN
R2 C0
R1
C1
C
C0
C3
SW
L1
R4
ON
1
C5
72
C4
C
2
SC
MGA-71, MGA-72
R3
C8
C
C2
RFC
C0
Out
HM 8/98
Table 1. Component Values for 1900 MHz Amplifier.
Hints and Troubleshooting
• Preventing Oscillation
Stability of the MGA-72543 is dependent on having very
good RF grounding. Inadequate device grounding or
poor PCB layout techniques could cause the device to be
potentially unstable.
[1] General Electric Co.
R1 =
R2 =
R3 =
R4 =
L1 =
RFC =
SW1, SW2
SC
Figure 14. Schematic Diagram of 1900 MHz Evaluation Amplifier.
Input
Vin
RF
R2
5.1 KΩ
5.1 KΩ
10Ω
24Ω
3.9 nH
22 nH
DIP switch
Short
V
d
C1
C3
C0
R1
L1
C
C (3 ea)
C (3 ea)
C1
C2
C3
C4
C5
C6
C0
C4
3
1
C5
72
SW1
SW2
=100 pF
=1000 pF
=100 pF
= 47 pF
= 30 pF
= 22 pF
=22 pF
=30 pF
C
2
4
R
R3
R4
bias
C6
RFC
Vcon
C0
C2
C
Output
RF