Video Accessory ICs
High Performance VCOs
for Image Sampling
BU2373FV,BU2374FV
No.11069EBT07
●Description
General-purpose VCO Series ICs (BU2373FV and BU2374FV) have a built-in VCO and phase comparator and facilitate the
configuration of a PLL system through the external connection of a LPF and frequency divider.
Furthermore, in order to facilitate the loop constant settings of the PLL system, the application manual has been enhanced to
ensure studies on the application.
●Features
1) The VCO enables midpoint settings within the range of oscillation through the external resistance.
2) The rising edge trigger type of phase comparator is built in.
3) Power-down mode setting can be made independently with the VCO and the phase comparator.
4) The VCO output frequency division can be selected on the SELECT pin.
5) Compact SSOP-B14 Package is adopted.
●Applications
CRT, LCD monitor, and CD-RW
●Line
up matrix
BU2373FV
VDD=3.0V
Supply voltage VDD=3.3V
VDD=5.0V
VDD=3.0V
Frequency
range
VDD=3.3V
VDD=5.0V
VCO-Frequency dividing mode
Operating temperature range
Package
○
○
○
37½60MHz
37½65MHz
43½100MHz
1/2
-20½75℃
SSOP-B14
BU2374FV
－
○
－
－
37½60MHz
－
1/4
-20½75℃
SSOP-B14
●Absolute
maximum ratings (Ta=25℃)
Symbol
Supply voltage
Input voltage
Storage temperature range
Ratings
-0.5½7.0
-0.5½VDD+0.5
-30½125
400
Unit
V
V
℃
mW
VDD
VIN
Tstg
Pd
Power dissipation
*1
*2
*3
*4
Operating is not guaranteed.
In the case of exceeding Ta = 25℃, 4.0mW should be reduced per 1℃.
The radiation-resistance design is not carried out.
Power dissipation is measured when the IC is mounted to the printed circuit board.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/18
2011.08 - Rev.B
BU2373FV,BU2374FV
●Electrical
characteristics
◎BU2373FV(Ta=25℃,
VDD=3.0V, unless otherwise specified.)
Limits
Parameter
Symbol
Min.
Typ.
(VCO)
VCO_IN input impedance
Consumption current
(while in normal mode)
Consumption current
(while in standby mode)
Control voltage
Oscillation range
Bias resistor range
Frequency sensitivity
Output duty
(PFD)
Consumption current
(while in normal mode)
Consumption current
(while in standby mode)
*1 Design guaranteed figures
Technical Note
Max.
Unit
Conditions
Zi
Idd(VCO)
Idd_st(VCO)
VI
frange
Rbias
β1
Duty
-
-
-
0.5
37
1.5
-
45
10
15
-
-
-
-
23
50
-
-
1
VDD-0.5
60
2.0
-
55
MΩ
mA
µA
V
MHz
KΩ
MHz/V
%
*1
With 60 MHz output
VCO_INHIBIT=”H”,
VCOIN=”L”
*2
Measured
at a voltage of 1/2 of VDD
When 1 MHz is input to
the FIN_A and B
PFD_INHIBIT=”H”,
FIN_A,B=”L”
Idd(PFD)
Idd_st(PFD)
-
-
0.5
-
-
1
mA
µA
37 MHz to 45 MHz when Rbias = 2.0 kΩ
50 MHz to 60 MHz when Rbias = 1.5 kΩ
*2 Frequency sensitivity
{ f1 (VCOIN=2.0V)
f2 (VCOIN = 1.0V) } / 1.0V
*3 If the SELECT pin is set to “H” and the output frequency is reduced to 1/2, the frequency range and the frequency sensitivity will be all reduced to 1/2.
BU2373FV(Ta=25℃, VDD=5.0V, unless otherwise specified.)
Parameter
(VCO)
VCO_IN input impedance
Consumption current
(while in normal mode)
Consumption current
(while in standby mode)
Control voltage
Oscillation range
Bias resistor range
Frequency sensitivity
Output duty
(PFD)
Consumption current
(while in normal mode)
Consumption current
(while in standby mode)
*1 Design guaranteed figures
Symbol
Limits
Min.
Typ.
Max.
Unit
Conditions
Zi
Idd(VCO)
Idd_st(VCO)
VI
frange
Rbias
β1
Duty
-
-
-
0.5
43
1.6
-
45
10
25
-
-
-
-
25
50
-
-
1
VDD-0.5
100
2.5
-
55
MΩ
mA
µA
V
MHz
KΩ
MHz/V
%
*1
With 60 MHz output
VCO_INHIBIT=”H”,
VCOIN=”L”
*2
Measured
at a voltage of 1/2 of VDD
When 1 MHz is input to
the FIN_A and B
PFD_INHIBIT=”H”,
FIN_A&B=”L”
Idd(PFD)
Idd_st(PFD)
-
-
1
-
-
1
mA
µA
43 MHz to 77 MHz when Rbias = 2.5 kΩ
75 MHz to 100 MHz when Rbias = 1.6 kΩ
*2 Frequency sensitivity
{ f1 (VCOIN = 3.5V)
f2 (VCOIN=1.5 V) } / 2.0V
*3 If the SELECT pin is set to “H” and the output frequency is reduced to 1/2, the frequency range and the frequency sensitivity will be all reduced to 1/2.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2/18
2011.08 - Rev.B
BU2373FV,BU2374FV
◎BU2374FV(Ta=25℃,
VDD=3.3V, unless otherwise specified.)
Limits
Parameter
Symbol
Min.
Typ.
(VCO)
VCO_IN input impedance
Consumption current
(while in normal mode)
Consumption current
(while in standby mode)
Control voltage
Oscillation range
Bias resistor range
Frequency sensitivity
Output duty
(PFD)
Consumption current
(while in normal mode)
Consumption current
(while in standby mode)
*1 Design guaranteed figures
Technical Note
Max.
Unit
Conditions
Zi
Idd(VCO)
Idd_st(VCO)
VI
frange
Rbias
β1
Duty
-
-
-
0.5
37
2.0
-
45
10
12.5
-
-
-
-
23
50
-
-
1
VDD-0.5
60
3.0
-
55
MΩ
mA
µA
V
MHz
KΩ
MHz/V
%
*1
With 50 MHz output
VCO_INHIBIT=”H”,
VCOIN=”L”
*2
Measured at a voltage
of 1/2 of VDD
When 1 MHz is input to
the FIN_A and B
PFD_INHIBIT=”H”,
FIN_A, B=”L”
Idd(PFD)
Idd_st(PFD)
-
-
0.5
-
-
1
mA
µA
37 MHz to 54 MHz when Rbias =2 .0 kΩ
53 MHz to 60 MHz when Rbias = 3.0 kΩ
*2 Frequency sensitivity
{ f1 (VCOIN = 2.0V)
f2 (VCOIN = 1.0 V) } / 1.0V
*3 If the SELECT pin is set to “H” and the output frequency is reduced to 1/4, the frequency range and the frequency sensitivity will be all reduced to 1/4.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
3/18
2011.08 - Rev.B
BU2373FV,BU2374FV
●Reference
data
(BU2373FV－Power Voltage Fluctuation Data)
55
54
53
52
Duty
：
Duty[%]
51
50
49
48
47
46
45
-25
0
25
50
75
Temperature
：
T[
℃
]
100
Duty
：
Duty[%]
55
54
Technical Note
100
52
51
50
49
48
47
46
45
-25
0
25
50
Temperature
：
T[
℃
]
75
100
Output Frequency
：
f[MHz]
53
80
60
40
From top:VDD=3.15V
VDD=3.00V
VDD=2.85V
From top:VDD=3.15V
VDD=3.00V
VDD=2.85V
20
From top: VDD=3.15V
VDD=3.00V
VDD=2.85V
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
0
Fig.1 Control Vole
Output Frequency
(VDD=3.0V,Rbias=1.5KΩ,Ta=25℃)
Fig.2 Control Voltage – Output Frequency
(VDD=3.0V,Rbias=1.8KΩ,Ta=25℃)
Fig.3 Control Voltage – Output Frequency
(VDD=3.0V,Rbias=2.0KΩ,Ta=25℃)
100
100
100
Output Frequency
：
f[MHz]
Output Frequency
：
f[MHz]
Output Frequency
：
f[MHz]
80
80
80
60
60
60
40
20
From top: VDD=3.45V
VDD=3.30V
VDD=3.15V
40
40
20
From top:VDD=3.45V
VDD=3.30V
VDD=3.15V
20
From top:VDD=3.45V
VDD=3.30V
VDD=3.15V
0
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
0
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
0
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
Fig.4 Control Voltage – Output Frequency
(VDD=3.3V,Rbias=1.6KΩ,Ta=25℃)
Fig.5 Control Voltage – Output Frequency
(VDD=3.3V,Rbias=2.0 KΩ,Ta=25℃)
Fig.6 Control Voltage – Output Frequency
(VDD=3.3V,Rbias=2.2 KΩ,Ta=25℃)
150
125
Output Frequency
：
f[MHz]
Output Frequency
：
f[MHz]
100
75
50
25
0
0.0
1.0
2.0
3.0
4.0
Control Voltage
：
VI[V]
5.0
150
125
100
75
50
25
0
0.0
1.0
2.0
3.0
4.0
Control Voltage
：
VI[V]
5.0
Output Frequency
：
f[MHz]
150
125
100
75
50
25
0
0.0
1.0
2.0
3.0
4.0
5.0
Control Voltage
：
VI[V]
From top:VDD=5.25V
VDD=5.00V
VDD=4.75V
From top:VDD=5.25V
VDD=5.00V
VDD=4.75V
From top:VDD=5.25V
VDD=5.00V
VDD=4.75V
Fig.7 Control Voltage – Output Frequency
(VDD=5.0V,Rbias=1.6KΩ,Ta=25℃)
Fig.8 Control Voltage – Output Frequency
(VDD=5.0V,Rbias=2.4KΩ,Ta=25℃)
Fig.9 Control Voltage – Output Frequency
(VDD=5.0V,Rbias=2.7KΩ,Ta=25℃)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/18
2011.08 - Rev.B
BU2373FV,BU2374FV
●Reference
data
(BU2373FV－Temperature Fluctuation Data)
100
100
100
Technical Note
Output Frequency
：
f[MHz]
Output Frequency
：
f[MHz]
Output Frequency
：
f[MHz]
80
80
80
60
60
60
40
40
40
20
From top:T=25℃
T=-20℃
T=75℃
20
From top:T=75℃
T=25℃
T=-20℃
20
From top:T=75℃
T=25℃
T=-20℃
0
0.0
0.5
1.0
1.5
2.0
Control Voltage
：
VI[V]
2.5
3.0
0
0.0
0.5
1.0
1.5
2.0
2.5
Control Voltage
：
VI[V]
3.0
0
0.0
0.5
1.0
1.5
2.0
2.5
Control Voltage
：
VI[V]
3.0
Fig.10 Control Voltage – Output Frequency
(VDD=3.0V,Rbias=1.5KΩ)
Fig.11 Control Voltage – Output Frequency
(VDD=3.0V,Rbias=1.8KΩ)
Fig.12 Control Voltage – Output Frequency
(VDD=3.0V,Rbias=2.0 KΩ)
100
100
100
Output Frequency
：
f[MHz]
Output Frequency
：
f[MHz]
60
60
Output Frequency
：
f[MHz]
80
80
80
60
40
40
40
20
From top:T=75℃
T=25℃
T=-20℃
20
From top:T=75℃
T=25℃
T=-20℃
20
From top:T=75℃
T=25℃
T=-20℃
0
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
0
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
0
0.0
0.5
1.0 1.5 2.0 2.5
Control Voltage
：
VI[V]
3.0
3.5
Fig.13 Control Voltage – Output Frequency
(VDD=3.3V,Rbias=1.6KΩ)
Fig.14 Control Voltage – Output Frequency
(VDD=3.3V,Rbias=2.0KΩ)
Fig.15 Control Voltage – Output Frequency
(VDD=3.3V,Rbias=2.2KΩ)
150
125
Output Frequency
：
f[MHz]
100
75
50
25
0
0.0
1.0
2.0
3.0
4.0
Control Voltage
：
VI[V]
5.0
150
125
Output Frequency
：
f[MHz]
100
75
50
25
0
0.0
1.0
2.0
Output Frequency
：
f[MHz]
150
125
100
75
50
25
0
0.0
1.0
From top:T=75℃
T=25℃
T=-20℃
From top:T=75℃
T=25℃
T=-20℃
3.0
4.0
5.0
Control Voltage
：
VI[V]
From top:T=75℃
T=25℃
T=-20℃
2.0
3.0
4.0
Control Voltage
：
VI[V]
5.0
Fig.16 Control Voltage – Output Frequency
(VDD=5.0V,Rbias=1.6KΩ)
Fig.17 Control Voltage– Output Frequency
(VDD=5.0V,Rbias=2.4KΩ)
Fig.18 Control Voltage – Output Frequency
(VDD=5.0V,Rbias=2.7KΩ)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
5/18
2011.08 - Rev.B
京公网安备 11010802033920号
EEWORLD
