參數(shù)資料
型號： TLC2942IDBR
廠商： TEXAS INSTRUMENTS INC
元件分類： PLL合成/DDS/VCOs
英文描述： PHASE LOCKED LOOP, 20 MHz, PDSO38
封裝： PLASTIC, SO-38
文件頁數(shù)： 8/29頁
文件大?。?/td> 473K
代理商： TLC2942IDBR
TLC2942
HIGH-PERFORMANCE DUAL PHASE-LOCKED LOOP BUILDING BLOCK
SLAS146B – NOVEMBER 1996 – REVISED JUNE 1997
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 18
0.03
0.02
0.01
2
2.5
3.5
4
0.04
SUPPLY VOLTAGE COEFFICIENT OF VCO
OSCILLATION FREQUENCY
vs
BIAS RESISTOR
0.05
4.5
RBIAS – Bias Resistor – k
VDD = 2.85 V to 3.15 V
VCOIN = 1/2 VDD
TA = 25°C
3
–
Supply
V
oltage
Coefficient
of
Oscillation
Frequency
–
%/V
k
SVS(fosc)
0
Figure 19
0.005
1.5
2.5
3
0.01
3.5
RBIAS – Bias Resistor – k
SUPPLY VOLTAGE COEFFICIENT OF VCO
OSCILLATION FREQUENCY
vs
BIAS RESISTOR
VDD = 4.75 V to 5.25 V
VCOIN = 1/2 VDD
TA = 25°C
2
0
–
Supply
V
oltage
Coefficient
of
Oscillation
Frequency
–
%/V
k
SVS(fosc)
Figure 20
20
15
10
30
25
2
2.5
3.5
4
4.5
Recommended
Lock
Frequency
–
MHz
RECOMMENDED LOCK FREQUENCY
(
×1 OUTPUT)
vs
BIAS RESISTOR
RBIAS – Bias Resistor – k
VDD = 2.85 V to 3.15 V
TA = – 20°C to 75°C
3
Figure 21
40
30
20
10
1.5
2
2.5
50
60
3.5
RBIAS – Bias Resistor – k
Recommended
Lock
Frequency
–
MHz
RECOMMENDED LOCK FREQUENCY
(
×1 OUTPUT)
vs
BIAS RESISTOR
VDD = 4.75 V to 5.25 V
TA = – 20°C to 75°C
3
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