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參數(shù)資料
| 型號(hào)： | S1T8825 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 1.1GHZ DUAL PLL |
| 中文描述： | 1.1GHz的雙鎖相環(huán) |
| 文件頁(yè)數(shù)： | 7/16頁(yè) |
| 文件大?。?/td> | 120K |
| 代理商： | S1T8825 |
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1.1GHZ DUAL PLL
S1T8825
7
PRELIMINARY ( VER.2.1 )
CHARGE PUMP OUTPUT POLARITY (CP)
In normal operation, the CP should be
“
0
”
.
In reverse operation, the CP should be
“
1
”
.
Depending upon VCO characteristics, CP should be set accordingly;
When VCO characteristics are like (1), CP should be set to low
When VCO characteristics are like (2), CP should be set to high.
CHARGE PUMP OUTPUT CURRENT (CP1, CP2)
The S1T8825 includes a constant current output type charge pump circuit.
Output current is varied according to control bit
“
CP1
”
and
“
CP2
”
.
In order to get high speed lock-up, select the best charge pump output current.
Control Bit
Charge Pump
Output Current
CP1
CP2
0
0
±
100
μ
A
0
1
±
200
μ
A
1
0
±
400
μ
A
1
1
±
800
μ
A
(1)
(2)
VCO
Output
Frequency
VCO Characteristics
VCO Input Voltage
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