mc10ep196 ON Semiconductor, mc10ep196 Datasheet - Page 10

• Manufacturer Part Number: mc10ep196
• Description: 3.3v/5vecl Programmable Delay Chip With Ftune
• Manufacturer: ON Semiconductor

Using the FTUNE Analog Input
add more delay in a tunable gate to enhance the 10 ps resolution
capabilities of the fully digital EP196. The level of resolution
obtained is dependent on the voltage applied to the FTUNE pin.
must be capable of adjusting the additional delay finer than the
10 ps digital resolution (See Logic Diagram). This requirement
is easily achieved because a 60 ps additional delay can be
obtained over the entire FTUNE voltage range (See Figure 5).
This extra analog range ensures that the FTUNE pin will be
The analog FTUNE pin on the EP196 device is intended to
To provide this further level of resolution, the FTUNE pin
900
800
700
600
500
400
300
200
100
–10
90
80
70
60
50
40
30
20
10
0
0
0
3.3 2.97
25 C
85 C
Figure 5. Propagation Delay versus FTUNE Voltage
–40 C
2.64
MC10EP196, MC100EP196
2.31 1.98
1000
Figure 4. F
FTUNE VOLTAGE (V)
http://onsemi.com
FREQUENCY (MHz)
TBD
1.65
10
max
capable even under worst case conditions of covering a digital
resolution. Typically, the analog input will be driven by an
external DAC to provide a digital control with very fine analog
output steps. The final resolution of the device will be dependent
on the width of the DAC chosen.
input, Figure 5 should be used. There are numerous voltage
ranges which can be used to cover a given delay range; users are
given the flexibility to determine which one best fits their
designs.
1.32
/Jitter
To determine the voltage range necessary for the FTUNE
2000
0.99
V
V
0.66
CC
EE
= –3.3 V
= 0 V
0.33
3000
0
9
8
7
6
5
4
3
2
1
É
É