MBC13900T1 データシートの表示（PDF） - Motorola => Freescale
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MBC13900T1 Datasheet PDF : 26 Pages
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Freescale Semiconductor, IncA.pplications Information
VCC
C5
R6
C3
C1
Gnd
R2
C4
R3
C2
Component Value
C1
1.0 µF
C2
3.3 pF
C3
12 pF
C4
0.01 µF
C5
1.0 µF
C6
0.3 pF
L1
6.8 nH
L2
5.6 nH
L3
<0.5 nH
R1
133 Ω
R2
49.9 kΩ
R3
16.5 Ω
R4
0Ω
R5
3.9 Ω
R6
0Ω
Vias
PCB
FR4
Comments
Optional Bypassing
DC Block and S22
DC Block and S11
Broadband bypass
Broadband bypass
IIP3 improvement
Toko LL1608-FS, match, bias
Toko LL1608-FH, match, bias
Emitter L on board (distance to GND vias)
Bias
Bias
Stability, S22
Jumper
Stability, S22
Jumper
D = 15 mil
εr=4.5, h=25 mil, t=1.75 mil
Figure 19. 900 MHz LNA Board Layout
Table 4. Typical 900 MHz LNA Performance
VCC
IC
(mA)
NF
(dB)
50 Ω
Insertion
Gain (dB)
Output IP3 Input Return
(dBm)
Loss (dB)
Output
Return
Loss (dB)
3.0
5.0
1.2
19.7
15
10.1
10.2
3.5
6.1
1.21
20.2
17.6
10.8
10.8
3.2 1900 MHz LNA
Figure Figure 20 shows the schematic and Figure 21 shows the component placement for a 1900 MHz
LNA. The design goals for the circuit are:
NF < 1.35 dB
Gain > 14 dB
Return Loss > 10 dB, input and output
Unconditional stability from 100 MHz to 6 GHz.
Typical performance that can be expected from this circuit at 3.0 V VCC and 5.0 mA is listed in Table 5.
The component values can be changed to enhance the performance of a particular parameter but usually at
the expense of another. Gain can be improved by sacrificing stability (R3 and R5). Input return loss can be
sacrificed to improve noise figure. Input return loss can be improved at the expense of noise figure (C3,
C7, L4). IIP3 can be improved by increasing emitter degeneration (L3) and bias current (R2). Unused
traces are available on the PCB to add emitter degeneration at leads 1 and 3 of the device.
MOTOROLA
MBC13900 Technical Data
11
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