ROHM BD3825FS Technical data

Video/Audio Interfaces for TV and DVD Recorders

PAL Audio
I/O Interface

BD3825FS

٨Description

TECHNICAL NOTE

BD3825FS is an audio signal switch IC used for PAL DVD-Recorders. BD3825FS supports six input lines which are
controlled by the I

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 ratings㧔Ta=25°C㧕

2

C-BUS of video signal LSI BH7624KS2. In addition, BD3825FS has two built-in Function Switch features.

Parameter Symbol Limits Unit

Power Supply Voltage1 V1 r6.0 V

V

Power Supply Voltage2
Power Dissipation Pd 800 *1 mW
Operating Temperature Range Topr -25 㨪 +75 °C
Storage Temperature Range Tstg -55 㨪 +125 °C

*1 Reduced by 9 mW/qC over 25qC.

㧗13.5 V

2

٨Operating range (Ta=25°C)

Parameter Symbol Limits Unit
Supply voltage1 Vcc1 r4.5㨪r5.5 V
Supply voltage2 Vcc2 11.5㨪12.5 V

Note: This IC is not designed to be radiation-resistant.

Ver.B Oct.2005

٨Electrical characteristics (Unless otherwise specified, Vcc1=±5.0V, Vcc2=12V, Ta=25°C)

Item Symbol

㧨whole㧪

Circuit Current 1

Circuit Current 2

㧨AUX, L1_R,L OUT㧪

Frequency Characteristic

Distortion

S/N

ON Resistance

Limit

Unit Conditions

MIN. TYP. MAX.

2.5 5.0 7.5 mA Vcc1=±5V

I

ATYP1

5.0 10.0 15.0 mA Vcc2=12V

I

ATYP2

-1.0 0.0 1.0 dB

F

FC

F

DIS

80 90 - dB

F

SN

- 200 300 ȍ Vin=0V

R

ON

- 0.007 0.1 %

Vin=2Vrms, f=20Hz/100kHz

=47kȍ

R

L

Vin=2.2Vrms, f=1kHz

=47kȍ

R

L

Vin=2Vrms, f=1kHz

No Filter

MUTE Attenuation

ASW1 SW Crosstalk

ASW2 SW Crosstalk

Between crosstalk channel
(AUX_L chЊR ch)

Between crosstalk channel
(L1_L chЊR ch)

FS_AUX,FS_L1 output voltage H

FS_AUX,FS_L1 output voltage M

FS_AUX,FS_L1 output voltage L

ASW1,2,3,4 input voltage H

- -80 -75 dB

F

MUTE

F

F

F

F

- -90 -85 dB Vin=2Vrms, f=1kHz

SWCRS1

- -90 -85 dB Vin=2Vrms, f=1kHz

SWCRS2

- -90 -85 dB Vin=2Vrms, f=1kHz

CHCRS1

- -90 -85 dB Vin=2Vrms, f=1kHz

CHCRS2

10.0 11.0 12.0 V RL=10kȍ

V

FSOH

5 5.75 6.5 V RL =10kȍ

V

FSOM

0 0 1.5 V RL =10kȍ

V

FSOL

2.0 - +Vcc1 V

V

ASWH

Vin=2Vrms, f=1kHz

R

=47kȍ

L

ASW1,2,3,4 input voltage L

FS_AUX, FS_L1 input voltage H

FS_AUX, FS_L1 input voltage M

FS_AUX, FS_L1 input voltage L

0 - 1.0 V

V

ASWL

3.9 - +Vcc1 V

V

FSIH

1.65 - 3.1 V

V

FSIM

0 - 0.85 V

V

FSIL

2/8

٨Block diagram

67A.A+0



&#A.A+0



.A.A+0



67A4A+0



&#A4A+0



.A4A+0



#7:A.A+0



#7:A4A+0



(5A.A176



(5A.A+0



 UVCVGU

FS_L1 OUT





#59

#59

#59

TU_Lch
DA_Lch
L1_Lch

#59

1
2
3

SW1

#7:A.A176



MUTE 4
TU_Rch

1
DA_Rch
L1_Rch

2

3

#7:A4A176



MUTE 4

TU/DA/L1

DA_Lch

AUX_Lch

1
2

SW2

.A.A176



MUTE 3
DA_Rch

AUX_Rch

MUTE 3

12V

H
M
L

1
2

6.7V

Fig.1 Block Diagram

DA/AUX

FS_AUX OUT

(5A#7:A176

(5A#7:A+0

 UVCVGU

    

12V

H
M
L

-5V +5V +12V

6.7V



.A4A176



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