ICS9110 Integrated Circuit System, ICS9110 Datasheet - Page 5

• Manufacturer Part Number: ICS9110
• Manufacturer: Integrated Circuit System

f
f
Output Divider Turth Tables
Programming the PLL
The AV9110 has a wide operating range but it is recommended that it is operated within the following limits:
The AV9110 is a classical PLL circuit and the VCO output frequency is given by:
f
The 2 output drivers then give the following frequencies:
Notes:
1. Output frequency accuracy will depend solely on input reference frequency accuracy.
2. For output frequencies below 125 MHz, it is recommended that the VCO output divide, R, should be 2 or greater. This will
3. The minimum output frequency step size is approximately 0.2% due to the divider range provided.
VCO
CLK
CLK/X
2
2
0 5
0 0
give improved duty cycle.
M
M
H
k
=
=
H
H
z
C
=
z
z
<
O
<
N•V• fREF
0
0
<
1
1
f
D
R
f
f
E
1
V
V
F
f
C
C
f
f
R•X
M
REF
M
O
VCO
VCO
<
O
R
<
<
2 3
2
<
2
0 5
0 5
M
5
M
M
H
= N•V• fREF
=
M
Where N = VCO divided, 3 to 127
H
z
H
H
z
z
Table 2
z
C
f
M•R
VCLK
O
X
0
0
1
1
D
M =m Reference divide, 3 to 127
V = Perscale, 1 or 8
0
Where R, X = output dividers 1, 2, 4 or 8
or f
O
REF
u
p t
C
f
M
f
f
R
V
C
(output mixable by bit 17)
t u
L
(
E
L
C
X
2
4
8
F
K
K
1
O
=
i D
)
=
=
=
X /
R
n I
i v
C
f e
V
L
e d
u p
C
r e
K
O
n e
r t
r o
o
e c
f e
t u
r e
C
d
u p
L
n e
i v i
f t
K
e c
e d
X /
e r
3 ,
f
u q
e r
o
t u
u q
n e
o t
u p
y c
n e
1
f t
7 2
y c
C
e r
O
u q
0
0
1
1
D
n e
1
y c
Table 3
C
O
0
0
1
1
D
0
O
AV9110
u
p t
V
t u
(
C
R
2
4
8
1
O
i D
)
i v
e d