P1818/19/20/21/22
®
Input Frequency and Modulation Rate
Input
frequency range
Output
frequency range
Part number
Modulation rate
P1818
P1819
P1820
10 MHz to 20 MHz
20 MHz to 40 MHz
40 MHz to 80 MHz
10 MHz to 20 MHz
20 MHz to 40 MHz
80 MHz to 160 MHz
10 MHz to 20 MHz
20 MHz to 40 MHz
40 MHz to 80 MHz
10 MHz to 20 MHz
20 MHz to 40 MHz
80 MHz to 160 MHz
Input frequency / 256
Input frequency / 512
Input frequency / 2048
Input frequency / 256
Input frequency / 512
Input frequency / 3584
FRS=0
FRS=1
P1821
P1822
Spread Deviation Selections
1
SRS
SR0
D_C
Spread deviation
Part number
2
0
1
N/A
N/A
-2.50% (Down)
-3.50% (Down)
-1.25% (Down)
-1.75% (Down)
+/-1.25% (Center)
+/-1.75% (Center)
P1818 /19/20/21A
P1818/19/20/21B
P1818/19/20/21C
P1818/19/20/21D
P1818/19/20E
0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1
0
1
0
N/A
+/-0.625% (Center)
+/-0.875% (Center)
-1.25% (Down)
1
N/A
0
1
+/-0.625% (Center)
-2.5% (Down)
P1818/19/20F
N/A
N/A
N/A
0
1
+/-1.25% (Center)
-1.75% (Down)
P1818/19/20G
0
1
+/-0.875% (Center)
-3.5% (Down)
2
0
P1818 /19/20H
1
+/-1.75% (Center)
-1.25% (Down)
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
N/A
-2.50% (Down)
P1822A
P1822B
-1.75% (Down)
-3.50% (Down)
N/A
+/-0.625% (Center)
+/-1.25% (Center)
+/-0.875% (Center)
+/-1.75% (Center)
1. A through H represents various combinations of spread deviations, options, and modulation rates.
2. Refer to Frequency vs. Deviation (P1818A and P1818H).
March 2003
3 of 8
Low Power Mobile VGA EMI Reduction IC
Notice: The information in this document is subject to change without notice.
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
