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參數(shù)資料
| 型號： | ACD2200S8 |
| 廠商： | ANADIGICS INC |
| 元件分類： | 上/下變頻器 |
| 英文描述： | RF/MICROWAVE DOWN CONVERTER |
| 封裝： | SSOP-28 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 262K |
| 代理商： | ACD2200S8 |
7
11-Bit Programmable Counter Divide Ratio (B Counter)
e
d
i
v
i
D
o
it
a
R
B
N
8
1
N
7
1
N
6
1
N
5
1
N
4
1
N
3
1
N
2
1
N
1
N
0
1
N
9
N
8
3
000000000
11
4
00000000
1
0
-
-----------
7
4
0
2
11111111111
Notes:
Divide Ratio: 3 to 2047 (Divide ratios less than 3 prohibited)..
B > A
Pulse Swallow Function
f
VCO = [(P x B) + A] x fOSC/R
f
VCO:
Output frequency of external voltage controlled oscillator (VCO).
B:
Preset divide ratio of binary 11-bit programmable counter (3 to 2047).
A:
Preset divide ratio of 7-bit swallow counter (0 < A < P; A < B).
f
OSC:
Output frequency of the external reference frequency crystal or oscillator.
R:
Preset divide ratio of binary 15-bit programmable reference counter (3 to 32767).
P:
Preset modulus of dual modulus prescaler (P = 64).
Programmable Modes
Several modes of operation can be programmed with bits R16-R20 including the phase detector polarity and
the output of the LDf
o pin. The programmable modes are shown in Table I. Truth tables for the programmable
mdoes and LDf
o output are shown in Table II and Table III.
TABLE I. Programmable Modes
1
C2
C6
1
R7
1
R8
1
R9
1
R0
2
R
00
e
s
a
h
P
2
F
R
y
ti
r
a
l
o
P
r
o
t
c
e
t
e
D
a
na
nD
L
2
F
Rf
2
F
R
O
01
e
s
a
h
P
1
F
R
y
ti
r
a
l
o
P
r
o
t
c
e
t
e
D
a
na
nD
L
1
F
Rf
1
F
R
O
1
C2
C9
1
N9
2
N
10
a
na
n
11
a
na
n
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