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SA900 View Datasheet(PDF) - Philips Electronics
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SA900
I/Q transmit modulator
Philips Electronics
SA900 Datasheet PDF : 20 Pages
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Philips Semiconductors
I/Q transmit modulator
Preliminary specification
SA900
Table 3. Power Control
Attenuation (dB)
PC0 (0.6dB)
0
0
0.6
1
1.3
0
1.9
1
2.5
0
3.2
1
3.8
0
4.4
1
5.0
0
5.7
1
6.3
0
•
•
•
23.3
1
•
•
•
39.7
1
PC1 (1.3dB)
0
0
1
1
0
0
1
1
0
0
1
0
1
PC2 (2.5dB)
0
0
0
0
1
1
1
1
0
0
0
1
1
PC3 (5.0dB)
0
0
0
0
0
0
0
0
1
1
1
PC4 (10.0dB)
0
0
0
0
0
0
0
0
0
0
0
PC5 (20.0dB)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Component
Designator
R1
R2
C1
C2
C3
R
SET
PHSOUT
DUAL Mode
560
Ω
1k
Ω
2.2nF
No Load
33pF
15k
Ω
Value
Typical Filter Network
R2
R1
C2
C3
C1
AMPS Mode
560
Ω
5.6k
Ω
2.7
µ
F
.27
µ
F
6.8nF
75k
Ω
V
CTRL
Figure 5. PLL Loop Filter
SR00640
TANK_1
TANK_2
C1
V
CC
L1
C3
C2
(AMPS MODULATION)
fVCO
[
120MHz
C1 = C2 = 33pF
C3 = 12pF
1
VR1
V
CTRL
+
2
p
Ǹ
L1C
Ȁ
L1 = 82nH
VR1 TOKO KV1470
ǒ Ǔ
C
Ȁ +
C3
)
1
)
1
)
1
*
1
C1 C2 CVRI
Figure 6. VCO Tank Configuration
SR00641
1997 Sept 16
12
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