參數(shù)資料
型號: 74HC4046AD/T3
廠商: NXP SEMICONDUCTORS
元件分類: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, PDSO16
封裝: SOT-109, SOP-16
文件頁數(shù): 17/34頁
文件大小: 442K
代理商: 74HC4046AD/T3
1997 Nov 25
24
Philips Semiconductors
Product specication
Phase-locked-loop with VCO
74HC/HCT4046A
Fig.20 Definition of VCO frequency linearity:
V = 0.5 V over the VCC range:
for VCO linearity
f‘
0
f
1
f
2
+
2
---------------
=
linearity
f‘
0
f
0
f‘
0
----------------
100%
×
=
Fig.21 Frequency linearity as a function of R1, C1
and VCC: R2 = ∞ and V = 0.5 V.
Fig.22 Power dissipation
versus the value of R1:
CL = 50 pF;
R2 =
∞;
VVCOIN = 1/2 VCC;
Tamb =25 °C.
C1 = 40 pF
- - - -C1 = 1
F
Fig.23 Power dissipation
versus the value of R2:
CL = 50 pF;
R1 =
∞;
VVCOIN =GND=0V;
Tamb =25 °C.
C1 = 40 pF
- - - - C1 = 1
F
Fig.24 Typical dc power
dissipation of
demodulator sections
as a function of RS:
R1 =R2=
∞;
Tamb =25 °C;
VVCOIN = 1/2 VCC.
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