ICS525-01 frequency calculator results
Results for:
desired input frequency =
20.0 MHz
desired output frequency = 50.0 MHz
desired output frequency accuracy = 100 ppm
Vdd= 3.3V
operating
temperature = 0 to 70 deg C
Solutions for the ICS525-01:
Out freq | error ppm | VCO divider | ref divider | VDW | RDW | OD | duty cycle spec | |
best accuracy |
50.000000 |
0.0 |
15 |
3 |
7 |
1 |
4 |
45 - 55% |
lowest jitter |
50.000000 |
0.0 |
15 |
3 |
7 |
1 |
4 |
45 - 55% |
lowest Idd |
50.000000 |
0.0 |
15 |
6 |
7 |
4 |
2 |
45 - 55% |
Set the input pins on the ICS525-01 according to this table:
S2 |
S1 |
S0 |
R6 |
R5 |
R4 |
R3 |
R2 |
R1 |
R0 |
V8 |
V7 |
V6 |
V5 |
V4 |
V3 |
V2 |
V1 |
V0 | |||
Out freq | error ppm | pin 5 |
4 |
3 |
2 |
1 |
28 |
27 |
26 |
25 |
24 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 | |
best accuracy |
50.000000 |
0.0 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
lowest jitter |
50.000000 |
0.0 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
lowest Idd |
50.000000 |
0.0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
ICS525-02 frequency calculator results
Results for:
desired input frequency =
20.0 MHz
desired output frequency = 50.0 MHz
desired output frequency accuracy = 100 ppm
Vdd= 3.3V
operating
temperature = 0 to 70 deg C
Solutions for the ICS525-02:
Out freq | error ppm | VCO divider | ref divider | VDW | RDW | OD | duty cycle spec | |
best accuracy |
50.000000 |
0.0 |
10 |
2 |
2 |
0 |
4 |
45 - 55% |
lowest jitter |
50.000000 |
0.0 |
10 |
2 |
2 |
0 |
4 |
45 - 55% |
lowest Idd |
50.000000 |
0.0 |
10 |
8 |
2 |
6 |
1 |
35 - 65% |
Set the input pins on the ICS525-02 according to this table:
S2 |
S1 |
S0 |
R6 |
R5 |
R4 |
R3 |
R2 |
R1 |
R0 |
V8 |
V7 |
V6 |
V5 |
V4 |
V3 |
V2 |
V1 |
V0 | |||
Out freq | error ppm | pin 5 |
4 |
3 |
2 |
1 |
28 |
27 |
26 |
25 |
24 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 | |
best accuracy |
50.000000 |
0.0 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
lowest jitter |
50.000000 |
0.0 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
lowest Idd |
50.000000 |
0.0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
Choosing Between the ICS525-01 and ICS525-02
The differences between the ICS525-01 and -02 are primarily
cost and performance. The -01 is the lower cost part ; the -02 the higher
performance.
The ICS525-02 will operate to higher frequencies and typically
has one third lower jitter than the -01 at 3.3V.
If this calculator produces
acceptable solutions for both the -01 and -02, then the choice is based on
price/performance. Where low cost is critical, use the -01 and where lower
jitter is required, use the -02.