BU2370FV Datasheet, PDF (5/6 Pages) Rohm – VCO + phase comparator for TV

Multimedia ICs
BU2370FV
zElectrical characteristics (Unless otherwise noted,Ta=25°C, VCC=3.3V)
Parameter
Symbol Min.
Typ.
Max. Unit
Conditions
Operating current consumption
IDD
−
20
−
mA 60MHz oscillation when output loaded
VCO
Input control voltage range (Pin 6)
VID
1
−
3
V
Input H voltage (Pin 6)
IIH
−0.1
0
0.1
µA Inflow current when VDD applied to input
Input L voltage (Pin 6)
IIL
−0.1
0
0.1
µA Outflow current when GND applied to input
Max.oscillation frequency 1
FMAX1
30
−
−
MHz FSEL=L
Max.oscillation frequency 2
FMAX2
60
−
−
MHz FSEL=H
Min.oscillation frequency 1
FMIN1
−
−
15
MHz FSEL=L
Min.oscillation frequency 2
FMIN2
−
−
30
MHz FSEL=H
Frequency sensitivity 1
β1
−
15
−
MHz/V FSEL=L
Frequency sensitivity 2
β2
−
30
−
MHz/V FSEL=H
Output duty
Duty
45
50
55
% at 1/2 VDD
Rise-time
tr
−
2.5
−
nsec Time is from VDD 0.2 to VDD 0.8
Fall-time
tf
−
2.5
−
nsec Time is from VDD 0.2 to VDD 0.8
zApplication example
OUT VDD
OUT GND
1 ^{OUT VDD}
bypass
capacitor
2 ^{OUT GND}
1/N
3 ^{VCO OUT}
VCO VDD
VCO GND
AVDD
AGND
4 ^{VCO VDD}
bypass
capacitor
5 ^{VCO GND}
6 ^{VCO IN}
FIN-B ₁₄
FIN-A ₁₃
REF IN
VCOE ₁₂
DVDD ₁₁
DGND ₁₀
H:VCO out Disable(L Fix)
L:VCO out Enable
DVDD
bypass
capacitor
DGND
PD OUT ₉
DGND
7 ^FSEL1
PDE ₈
H:PD Disable(Hi lmp)
L:PD Enable
DVDD
This line is noise source. But if power line
and GND are divided into two, this line
becoms AVDD,AGND
Please take care this Power line. Because this line is most weak
indigitalnoise. So this line must be separated from digital_VDD,
GND. And place bypass capacitor (0.01µF) for power pin as close
to BU2370FV as possible.
DVDD,DGND
OUT DVDD,OUT GND
And place bypass capacitor (0.01µF) for power pin as close to
BU2370FV as possible.
This line is most noise source. So it should be separated from Analog.
And this line should be connected VDD of external VCC-outdivide.
And place bypass capacitor (0.01µF) for power pin as close to
BU2370FV as possible.
∗Recommend to use capacitor that is better to reduce high frequency noise.
∗Recommend to control (FSEL1, PDE, VCOE) by power line.(DVDD, DGND)
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