mga-655t6 Avago Technologies, mga-655t6 Datasheet - Page 4

• Manufacturer Part Number: mga-655t6
• Description: Low Noise Amplifer With Bypass Mode In Low Profle Package
• Manufacturer: Avago Technologies

Demo Board Layout
Figure 4. Demo board layout diagram*
*Application Notes:
1. Performance in a specified frequency band can be optimized by changing component values in the demoboard above to suit the application at
2. Operational Logic of Bypass pin (Pin 1):
Demo Board Schematic for 3.5 GHz Application
RF
Figure 5. Demo board schematic diagram
4
V
BYPASS
IN
that frequency. The following graphs show components used to demonstrate performance at the (3 - 4) GHz band.
Pin 1 voltage in LNA mode can be varied to enable the LNA bias current to be adjusted.
- Normal LNA operation: [2 to 2.7] volt,
- Bypass mode: [0 to 0.2] volt
L1
C5
1
2
3
BIAS/CONTROL
MGA 655T6
6
5
4
NC
C2
L2
C3
R1
L3
*Jumpers indicated in the demo board drawing are not
needed in actual application board; this is because generic
demo boards were used for development.
Part
J2*,
J1*
C2
C3
C4
C5
R1
J3*
L1
L2
L3
C4
RF
V
DD
OUT
0402
0402
0402
0402
0402
0402
0402
0402
0402
Size
Notes:
1. L1 is an input matching inductor.
2. L2 and C2 form the output matching
3. R1&L3 is a network that isolates the
4. C3 is a RF bypass capacitor.
network.
measurement demoboard from external
disturbances. C4 and C5 migrate the
effect of external noise pickup on the
V
are not required in actual operation.
5.1 ohm MCR Series (Rohm)
1000 pF MCH155 Series (Rohm)
10.0 nH LLP1005 Series (TOKO)
dd
1.2 nH
1.0 nH
0 ohm
4.7 pF
4.7 pF
0.1 uF
Value
and V
bypass
P/N
LLP1005 Series (TOKO)
LLP1005 Series (TOKO)
C1005C0G1H4R7C (TDK)
C1005C0G1H4R7C (TDK)
MCH155 Series (Rohm)
RK73Z1E000 (KOA)
Copper Foil
lines. These components