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BD3825FS PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD3825FS
기능 PAL Audio I/O Interface
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BD3825FS 데이터시트, 핀배열, 회로
TECHNICAL NOTE
Video/Audio Interfaces for TV and DVD Recorders
PAL Audio
I/O Interface
BD3825FS
٨Description
BD3825FS is an audio signal switch IC used for PAL DVD-Recorders. BD3825FS supports six input lines which are
controlled by the I2C-BUS of video signal LSI BH7624KS2. In addition, BD3825FS has two built-in Function Switch features.
٨Features
1) Vcc = ±5V (for Audio signal), +12V (for Function SW)
Audio SW (C-MOS analog switch configuration)
2) 3 inputs - 1output SW, (2 circuits built-in with MUTE function)
3) 2 inputs - 1output SW, (2 circuits built-in with MUTE function)
4) THD (typ.)
= 0.007%
5) S/N (typ.)
= 90dB
6) Crosstalk (typ.)
= 90dB
7) ON resistance (max.) = 300ȍ
8) 2 Function Switch outputs
٨Applications
DVD-Recorder, STB, etc.
٨Absolute maximum ratingsTa=25°C
Parameter
Symbol
Power Supply Voltage1
V1
Power Supply Voltage2
Power Dissipation
V2
Pd
Operating Temperature Range
Topr
Storage Temperature Range
*1 Reduced by 9 mW/qC over 25qC.
Tstg
Limits
r6.0
13.5
800 *1
-25 +75
-55 +125
Unit
V
V
mW
°C
°C
٨Operating range (Ta=25°C)
Parameter
Symbol
Limits
Supply voltage1
Vcc1
r4.5㨪r5.5
Supply voltage2
Vcc2
11.512.5
Note: This IC is not designed to be radiation-resistant.
Unit
V
V
Ver.B Oct.2005




BD3825FS pdf, 반도체, 판매, 대치품
٨Equivalent circuit
PIN
NO.
Pin name
IN
OUT
Referance
Voltage
1
7
ASW1
ASW4
٤
Threshold
1.02.0V
2
6
ASW2
ASW3
٤
Threshold
1.02.0V
3 +5V
11 -5V 㧙 㧙
13 +12V
4 TU_R_IN
5 TU_L_IN
8 DA_R_IN
9
DA_L_IN
٤㧙
15 AUX_R_IN
17 AUX_L_IN
21 L1_R_IN
23 L1_L_IN
5V
-5V
12V
Threshold
10 FS_L1_IN
٤㧙
12 FS_AUX_IN
0.85
1.65V
3.1
3.9V
14 AUX_R_OUT
16 AUX_L_OUT
㧙٤
20 L1_R_OUT
22 L1_L_OUT
18 FS_AUX_OUT
24 FS_L1_OUT
H:11.0V
٤ M:5.75V
L:0V
Equivalent Circuit
200K
30K
200K
Function
SW control signal
input terminal
At Input open, input
becomes “H” due to the
pull up resistance. Input
impedance is 200kȍ
SW control signal input
terminal
At input open, input
becomes “L” due to the
pull down resistance. Input
Impedance is 200kȍ.
Power supply terminal
50
50
12V
Audio signal input terminal
The audio signal input
terminal is connected to
the analog switch inside.
FS control signal input
terminal
It has two threshold
voltages. At input open, it
becomes “L” input due to
the pull down resistance.
Input impedance is 200kȍ
Audio signal output
terminal
A chosen audio signal can
be outputted using the
input transfer switch.
FS output terminal
6.7V
FS output circuit has 3
output states H, M & L.
Load resistance above
10kȍ is used.
Output becomes HiZ at “L”
selection.
19
GND
㧙㧙
0V
GND terminal
4/8

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BD3825FS 전자부품, 판매, 대치품
100
98
96
94
92
90
4.4 4.6 4.8 5 5.2 5.4 5.6
㪪㪬㪧㪧㪣㪰㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㪭㪚㪚㪈㩷㪲㪭㪴
Fig9. S/N ratio
(Supply voltage Dependence)
-80
100
98
96
94
92
90
-50 0
50 100
㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㪲㷄㪴
Fig10. S/N ratio
(Temperature dependence)
-80
250
200
150
100
-50
-80
0 50 100
㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴
Fig11. ON Resistance
-85 -85 -85
-90 -90 -90
-95 -95 -95
-100
-50 0
50 100
㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴
Fig12. MUTE Attenuation
-100
-50 0
50
㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴
Fig13. ASW Crosstalk
100
-100
-50 0
50 100
㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴
Fig14. Channel Crosstalk
٨Cautions on use
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. -5V pin potential
Ensure a minimum -5V pin potential in all operating conditions. Make sure that no pins are at a voltage below the -5V
pin at any time, regardless of whether it is a transient signal or not. <GND=0V>
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.
8. Supply voltage
Although basic circuit function is guaranteed under normal voltage operation (5V: ±4.55.5V, 12V: 11.512.5V),
ensure each parameter complies with appropriate electrical characteristics, when using this device.
9. The application circuitry example
SW and FS output are controlled by BD3825FS which in turn is controlled by BH7624KS2 and therefore, BD3825FS
and BH7624KS2 should be used in conjunction. Pins 18 and 24 should be pulled down by 10kȍ resistor. Pins 1, 2, 6,
7, 10, 12 must be controlled by the microcontroller when using BD3825FS on its own.
7/8

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관련 데이터시트

부품번호상세설명 및 기능제조사
BD3825FS

PAL Audio I/O Interface

Rohm
Rohm

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