mga-638p8 Avago Technologies, mga-638p8 Datasheet - Page 4

• Manufacturer Part Number: mga-638p8
• Description: High Linearity Low Noise Ampli?er
• Manufacturer: Avago Technologies

Demo Board Layout
Figure 5. Demo Board Layout Diagram
– Recommended PCB material is 10 mils Rogers RO4350.
– Suggested component values may vary according to
Table 1. Component list for 2.5 GHz matching
Notes:
C1, C2 are DC blocking capacitors
C1, L1, L3 input match for NF
L2 output match for IP3
C5, C6, C7, C8 are bypass capacitors
R1 is a stabilizing resistor
Rb is the biasing resistor
4
Part
C1
C2
C5, C6, C7, C8
C3, C4
L1
L2
L3
Rb
R1
R2
RFin
layout and PCB material.
Avago
Technologies
L3
Rb
C3
C1
L1
R1
C5
C7
C8
Size
0402
0402
0603
0402
0402
0402
0402
0402
0402
0402
C2
L2
C4
C6
BTS LNA
Nov 2010
Value
1.8 pF (Murata)
100 pF (Murata)
4.7 μF (Murata)
Not Used
8.2 nH (Toko)
5.6 nH (Toko)
1.8 nH (Toko)
680 ohm (Rohm)
51 ohm (Rohm)
0 ohm (Rohm)
RFout
RFin
Demo Board Schematic
Truth Table
Figure 6. Demo Board Schematic Diagram
Notes:
• The schematic is shown with the assumption that similar PCB is used
• Detail of the components needed for this product is shown in Table 1.
LNA Mode
Power Down Mode
for all MGA-636P8, MGA-637P8 and MGA-638P8.
L3
C3
C1
L1
R1
C5
Detail Part Number
GRM1555C1H1R8CB01D
GRM1555C1H101JD01D
GRM188R60J475KE19D
LLP1005-FH8N2C
LLP1005-FH5N6C
LLP1005-FH1N8C
MCR004YZPJ680
MCR004YZPJ510
MCR01MZPJ000
Rb
[RFinput]
[Vbias2]
[NU]
[NU]
[1]
[2]
[3]
[4]
V
0 or open
3.3
PwrDwn
Bias
(V)
[RFoutput]
[PwrDwn]
[Vbias1]
[NU]
[8]
[7]
[6]
[5]
R2
Vbias1
Vdd
L2
C2
C7
C6
C4
RFout
PwrDwn
C8