Avago Technologies MGA-71543 - Manual (Page 2)

2
Conclusion
The MGA-71543 can be used for 2.4GHz
applications with the following typical
performance summary data:
NF Gain IIP3 S11 S22
1.2 16 3.7 20 15
Current = 11mA
Frequency: 2.1GHz
Description 4 layer Board
Designation B
WCDMA-2100
Part Number Package
U2 or 71
DUT
* MGA-71543 SOT-343 (SC-70) / Switch LNA
U4 or 03 Switch b/n Gnd resistors FDG6303N Dual N-channel, Digital FET
C12 3.3pF Size 0402/Output match, DC block
C8 0.033
µµµµ
F Size 0402 / Bypass capacitor
C9 6.8 pF Size 0402 / DC block capacitor
C38 Not used
C36, C37, C44 82, 82, 27 pF Size 0402 / Bypass capacitors
C47 0.033
µµµµ
F Size 0402 / Bypass capacitor
L5 3.9 nH TOK LL1005 0402/Out match/RF choke,DC feed
L6 1.3 nH TOK LL1005 Size 0402 / input noise matching
L7 0
Ω Ω Ω Ω 0402 Jumper see notes
Lshunt 2.7nH Improves rloss, fit to connector
L25 Not used For tuning / Not used here
R38 51
Ω Ω Ω Ω Size low frequency loading
R20 36
Ω Size 0402 / set Id for 16mA Bias
R21 56
Ω Ω Ω Ω
Size 0402 / set Id for 10.5mA Bias
R24, R25 6.2
Ω Ω Ω Ω R24Drop voltage,R25resistive load
R16,R17 0
Ω Ω Ω Ω Size 0402 (Jumper)
R37 10
Ω Ω Ω Ω
Size 0402 improves k, omit w care
R18,R28 Not Used Used for other current setting
Table 1. Component Values for 2400 MHz amplifier on smaller board
Software
controlling
the switch
Manual switch
control