Document
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
VDD=3.0V
Supply voltage VDD=3.3V
VDD=5.0V
Frequency range
VDD=3.0V VDD=3.3V VDD=5.0V
VCO-Frequency dividing mode
Operating temperature range
Package
BU2373FV
○ ○ ○ 37~60MHz 37~65MHz 43~100MHz 1/2 -20~75℃ SSOP-B14
BU2374FV
- ○ - - 37~60MHz - 1/4 -20~75℃ SSOP-B14
●Absolute maximum ratings (Ta=25℃) Symbol
Ratings
Supply voltage
VDD
-0.5~7.0
Input voltage
VIN -0.5~VDD+0.5
Storage temperature range
Tstg
-30~125
Power dissipation Pd 400
*1 Operating is not guaranteed. *2 In the case of exceeding Ta = 25℃, 4.0mW should be reduced per 1℃. *3 The radiation-resistance design is not carried out. *4 Power dissipation is measured when the IC is mounted to the printed circuit board.
Unit
V V ℃ mW
www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved.
1/18
2011.08 - Rev.B
BU2373FV,BU2374FV
Technical Note
●Electrical characteristics ◎BU2373FV(Ta=25℃, VDD=3.0V, unless otherwise specified.)
Parameter
Limits Symbol
Min. Typ.
(VCO)
VCO_IN input impedance
Zi - 10
Consumption current (while in normal mode) Consumption current (while in standby mode)
Idd(VCO) Idd_st(VCO)
-
15 -
Control voltage
VI 0.5 -
Max.
1 VDD-0.5
Unit Conditions
MΩ
mA With 60 MHz output
µA
VCO_INHIBIT=”H”, VCOIN=”L”
V
Oscillation range
frange
37
-
60 MHz
Bias resistor range
Rbias
1.5
-
2.0 KΩ *1
Frequency sensitivity
β1 - 23 - MHz/V *2
Output duty
Duty
45
50
55
%
Measured at a voltage of 1/2 of VDD
(PFD)
Consumption current (while in normal mode)
Idd(PFD)
-
0.5
-
mA
When 1 MHz is input to the FIN_A and B
Consumption current (while in standby mode)
Idd_st(PFD)
-
-
1
µA
PFD_INHIBIT=”H”, FIN_A,B=”L”
*1 Design guaranteed figures 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
Symbol
Min.
Limits T.