MGA-53543-TR1 Avago Technologies US Inc., MGA-53543-TR1 Datasheet - Page 11

• Manufacturer Part Number: MGA-53543-TR1
• Description: IC,Microwave/Millimeter Wave Amplifier,SINGLE,SOT-343R,PLASTIC
• Manufacturer: Avago Technologies US Inc.

Specifications of MGA-53543-TR1

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

900 MHz LNA Design
To demonstrate the versatility of the MGA-53543, the
following example describes a cellular band Low Noise
Amplifier (LNA) design. The methodology for a 900 MHz
LNA design differs from the previous examples in that
only the input match affects noise figure. Thus, optimiz-
ing for minimum noise figure entails matching only the
input to Γ
matched to S for better gain or Γ
Figure 18 shows the complete schematic for a 900 MHz
low noise amplifier design and Table 5 describes the re-
quired components.
RF
Figure 18. Schematic for 900 MHz LNA design.
Table 5. Component Parts List for the MGA-53543 HLA at 900 MHz.
12 nH
15 nH
4.7 pF
2.2Ω
1000 pF
Performance of MGA-53543 at 900 MHz
Biased with a +5 Volt supply MGA-53543 delivers a Noise
Figure of 1.33 dB at 900 MHz. This number is higher than
NF
ponents with parasitic losses. A microstip or distributed
element match may improve noise figure by . dB. Gain is
measured to be 17.4 dB as shown in Figure 19. Input and
output VSWR are both better than :1, with input return
loss of 5 dB and output return loss at 17.5 dB shown in
Figure 0.
11
in
min
only because of loss from lumped element com-
12 nH
TOKO LL1608-FS12NJ
TOKO LL1005-FS15N
Phycomp 0402CG479C9B200
RHOM MCR01J2R2
Phycomp 04022R102K9B200
4.7 pF
opt
instead of Γ
1
3
53
2
4
+5V
S
, and the output can either be
2.2Ω
15 nH
4.7 pF
1000 pF
RF
out
L
for better linearity.
Figure 19. Gain, Noise Figure and Output Power at 900 MHz.
Figure 20. Input and Output return loss at 900 MHz.
Input IIP3 is measured to be 18.6 dBm and P1dB is 19.0
dB at 900 MHz.
Figure 19. Gain, Noise Figure and Output
Power at 900 MHz.
Figure 20. Input and Output Return Loss at
900 MHz.
-10
-15
-20
-25
-30
20
15
10
-5
5
0
0
400
400
600
600
FREQUENCY (MHz)
FREQUENCY (MHz)
800
800
1000
1000
Gain
NF
1200
1200
S11
S22
1400
1400