PT2399
FUNCTION DESCRIPTION
ECHO MODE
Please refer to the diagram below:
AUTO RESET FUNCTION
The waveform of the signal during power on is given below:
TABLE 1: VCO FREQUENCY VS DELAY TIME
R
fck
td
THD
R
fck
td
THD
R
fck
td
THD
R
fck
td
THD
27.6K
2.0M
342ms
1.0%
7.2K
6.0M
113.7ms
0.29%
2.8K
11M
61.6ms
0.18%
723
19M
36.6ms
0.14%
21.3K
2.5M
273ms
0.8%
6.4K
6.5M
104.3ms
0.27%
2.4K
12M
56.6ms
0.16%
519
20M
34.4ms
0.13%
17.2K
3.0M
228ms
0.63%
5.8K
7.0M
97.1ms
0.25%
2K
13M
52.3ms
0.15%
288
21M
32.6ms
0.13%
14.3K
3.5M
196ms
0.53%
5.4K
7.5M
92.2ms
0.25%
1.67K
14M
48.1ms
0.15%
0.5
22M
31.3ms
0.13%
12.1K
4.0M
171ms
0.46%
4.9K
8.0M
86.3ms
0.23%
1.47K
15M
45.8ms
0.15%
10.5K
4.5M
151ms
0.41%
4.5K
8.5M
81ms
0.22%
1.28K
16M
43ms
0.15%
9.2K
5.0M
136.6ms
0.36%
4K
9.0M
75.9ms
0.21%
1.08K
17M
40.6ms
0.14%
8.2K
5.5M
124.1ms
0.33%
3.4K
10M
68.1ms
0.19%
894
18M
38.5ms
0.14%
Notes:
1. R = VCO External Resistor (Ω), please refer to PT2399 Application Circuit.
2. fck = VCO Clock Frequency (Hz).
3. td = Delay Time
4. THD = Total Harmonic Distortion
5. We do not recommend the “R” value below 1KΩ when power on.
V1.6
4
February 2010
PTC [ PRINCETON TECHNOLOGY CORP ]
