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BD3823FV PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD3823FV
기능 NTSC-PAL Audio I/O
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BD3823FV 데이터시트, 핀배열, 회로
TECHNICAL NOTE
Video / Audio Interfaces for TV and DVD Recorders
NTSC-PAL Audio I/O
Interface for Recording
BD3823FV
ƔDescription
BD3823FV is a low-noise (3.2ҏμVrms), low distortion (0.0015%), 5ch selector, incorporating a resistor-ladder type
volume.
Because of a wide power supply voltage range (7V to 14.5V), BD3823FV can meet a wide input voltage (to 4.5 Vms), and high S/N
can be achieved. In addition, the built-in volume does not add any distortion ratio characteristics, even when the attenution is varied,
and is applicable for high-quality audio systems.
ƔFeatures
1) A resistor-ladder type volume circuit is with a low distortion ratio (0.0015% with volume set to –6dB) and low noise (3.2 ȝVrms with
volume set to -6dB).
2) By grouping sound input terminals with output terminals, the PCB layout is reduced.
3) Small package SSOP - B20 achieves good crosstalk characteristicss (-110 dB).
4) The use of Bi-CMOS process enables low current consumption and energy saving design.
Because of low current consumption, BD3823FV has the advantage in quality over the scaling down of the internal regulators and
heat controls.
ƔApplications
DVD recorders
ƔAbsolute maximum rating (Ta=25°C)
Parameter
Symbol
Limits
Unit
Applied Voltage
VCC
SCL, SDA
15.0
7.0
V
Input voltage
Power Dissipation
VIN
VCC+0.3̻GND-0.3
V
Pd
810 *1
mW
Operating Temperature
Topr
-40+85 *2
°C
Storage Temperature
Tastg
-55̻+150
°C
*1 Reduced by 6.5 mW/qC at 25qC or higher.
Thermal resistance Tja = 154 (°C/W), when Rohm standard board is mounted.
Rohm standard board: Size:70͙70͙1.6 (mm3)
Material: FR4 glass-epoxy substrate (copper foil area: not more than 3%).
*2 As long as voltage stays within operating voltage range, certain circuit operation is guaranteed in
the operating temperature range.
Allowable power loss conditions are related to temperature, to which care must be taken.
In addition though the standard value of its electrical characteristics cannot be guaranteed under
the conditions other than those specified, basic functions are maintained.
ƔOperating range (Basic operation at Ta=25ͨ)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Power supply voltage *3
VCC 7.0 12.0 14.5
V
*3 As long as temperature and operating voltage meet specifications
In addition, though the standard value of its electrical characteristics cannot be guaranteed under
the conditions other than those specified, basic functions are maintained.
Ver.B Oct.2005
!




BD3823FV pdf, 반도체, 판매, 대치품
I2C BUS FORMAT
MSB
LSB
S Slave Address
1bit 8bit 1bit
MSB
A
LSB MSB
Select Address
A
8bit 1bit
LSB
Data
8bit
AP
1bit 1bit
S = Start condition (Recognition of start bit)
Slave Address = Recognition of slave address. 7 bits in upper order are voluntary.
Least significant bit is “L” for writing.
A = ACKNOWLEDGE bit (Recognition of acknowledgement)
Select Address ͛Selection of volume, etc.
Data
͛Data such as volume, etc.
P = Stop condition (Recognition of stop bit)
I2C BUS Interface Protocol
1ͅBasic form
S Slave Address
MSB
LSB
A Select Address
MSB
LSB
A Data A P
MSB LSB
2ͅAutomatic increment (Select Address increases (+1) according to the number of data. ͅ
S Slave Address A Select Address A Data1 A Data2 A ¦¦¦¦
MSB
LSB MSB
LSB MSB LSB MSB LSB MSB LSB
DataN
̈́ᆯͅ
[1] Data 1 shall be set as data of address specified by Select Address.
[2] Data 2 shall be set as data of address specified by Select Address +1.
[3] Data N shall be set as data of address specified by Select Address +N-1.
AP
Slave Address
Because the slave address can be changed by the SELECT setting, it is possible to use two chips simultaneously on a single
control BUS .
MSB
LSB
SELECTvoltage condition
A6 A5 A4 A3 A2 A1 A0 R/W
GND ̻ 0.2×VCC
10000000
0.8×VCC ̻ VCC
10000100
Set the SELECT voltage within the condition defined.
Data format
Select MSB
Data
LSB
Items to be set Address
(HEX)
D7
D6
D5
D4
D3
D2
D1
D0
Input Selector 00
*
*
*
*
*
Input Selector
Volume ch1
01
*
*
Volume attenuation ch1
Volume ch2
02
*
*
Volume attenuation ch2
Gain Selector
03
*
*
*
*
*
* Gain Selector
*Don’t care
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BD3823FV 전자부품, 판매, 대치품
ƔHow to select application parts
Initial condition when power supply (17 pin) is turned ON
A circuit that carries out initialization in IC, when power supply (17 pin) is turned ON is incorporated. Settings are as shown in the
following table. However, it is recommended to transmit the data to all the addresses as initial data when power is turned ON, and
to apply mute while the initial data is input
Parameter
Symbol
Limits
Min. Typ. Max.
Unit
Conditions
VCC rise time
Trise
20
-
- ȝS VCC rise time from 0V to 3V
VCC voltage when power on
reset is released.
Vpor - 2.6 -
V
Function
Input Selector
Volume
Gain SERECTOR
Initial Condition
Input MUTE
-͡dB
0dB
Signal input section
1) Setting for input coupling capacitor
In the signal input terminal, set the constant for the input coupling capacitor C(F), taking the input impedance RIN (ȍ)
inside into account. This makes up the primary HPF characteristics of the RC.
C\F^!
RIN!
͆ȍ͇
GAIN[dB^!
0
A(f)
SSH
F\Hz^!
Input terminal
2) SHORT mode of input
Fig.15 Sigal input section
SHORT mode is a command to reduce resistance by setting impedance RIN to switch SSH͛ON. When SHORT
command is not chosen, switch SSH is turned OFF. By using this command, it is possible to stop charging externally
mounted coupling capacitor C. Use SHORT mode when there is no signal since the SHORT mode turns ON the SSH
switch in order to achieve low impedance.
Ɣ Operation Notes
1. Numbers and data in entries are representative design values and are not guaranteed values of the items.
2. Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to verify
circuit characteristics for your particular application. Modification of constants for other externally connected circuits may cause
variations in both static and transient characteristics for external components as well as this Rohm IC. Allow for sufficient
margins when determining circuit constants.
3. Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (Topr), may
result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such
damage is suffered. A physical safety measure, such as a fuse, should be implemented when using the IC at times where the
absolute maximum ratings may be exceeded.
4. GND potential
Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the GND at any
time, regardless of whether it is a transient signal or not.
5. Thermal design
Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in actual
states of use.
6. Short circuit between terminals and erroneous mounting
Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other components
on the circuits, can damage the IC.
7. Operation in strong electromagnetic field
Using the ICs in a strong electromagnetic field can cause operation malfunction.
!
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부품번호상세설명 및 기능제조사
BD3823FV

NTSC-PAL Audio I/O

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