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PDF BD3822FS Data sheet ( Hoja de datos )

Número de pieza BD3822FS
Descripción NTSC-PAL Audio I/O
Fabricantes ROHM Semiconductor 
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No Preview Available ! BD3822FS Hoja de datos, Descripción, Manual

TECHNICAL NOTE
Video/Audio Interfaces for TV and DVD Recorders
NTSC-PAL Audio I/O
Interface for Recording/Playing
BD3822FS, BD3824FS
ƔDescription
BD3822FS and BD3824FS are the audio selectors with internal input selector, gain amp, ALC and power save ON/OFF functions.
BD3822FS contains the 1/2 power compression amp for level meter and 2ch volume. BD3824FS contains the line amp.
BD3822FS and BD3824FS unify the board pattern by pin compatible, and can be used individually as a high-end and low-end
model.
ƔFeatures
1) Low distortion (0.0015%) and low noise (3.2μVrms) by using a resistance ladder type circuit for volume. Shock sound in
switching is also reduced (BD3822FS)
2) Low distortion (0.0015%) and low noises (2.3μVrms)(BD3824FS)
3) Contains an ALC circuit, and can also be used as an RF output
4) Best suited to energy-saving design by low current consumption by using the Bi-CMOS process; compact regulator in the
set, being advantageous to heating in terms of quality
5) SSOP-A32 is used for package. The PCB layout can be easy and the area of PCB is reduced by putting sound input
terminals together, and output terminals, too.
6) BD3822FS and BD3824FS can be used with the same PCB board.
7) I2C BUS data format of BD3822FS is upward compatible with BD3824FS, and can be used without changing the software.
8) A system is employed, in which the waveform connected to the input (tuner, Front, Ext) is not distorted even in standby
mode.
ƔApplications
DVD recorder
ƔProduct lineup
Function
BD3822FS
Volume function
Available
1/2 power compression amp
Available
Line amp
-
Circuit current (mA)
7
Output noise (μVrms)
3.2
BD3822FS is an upstream compatible IC with BD3824FS.
BD3824FS
-
-
Available
6.4
2.3
Ver.B Oct.2005

1 page




BD3822FS pdf
ƔExample of application circuit
Front1 Front2
DVD
A/D D/A
10ȝ
+
1ȝ
C+
1ȝ
C
10ȝ
+
24
(Ch1)
23
(Ch2)
C21
32 31 30 C22 29
2.2M
10ȝ
+
C20
4.7ȝ
C19
+1ȝ
C18
28 R 27
26
LINE
OUT
RF
OUT
+1ȝ
C
17
25
C15
10ȝ
+
C
16
10ȝ
24 23 22
SDA
21
Power
SCL ON/OFF DC2
R4 47k
20 19 18
DC1
17
VCC
0,4.6,4.8,5.0,5.2,5.4,5.6,6.0dB
VOL
0̻-78dB, - ͡dB
VOL
VCC
ALC
GND
1/2VCC
I2C BUS
LOGIC
0̻ - 78dB,- ͡dB
Power
ON/OFF
2 AMP
INPUT SELECTOR
8,12dB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
C1
+
C
2
+(Ch1)
C
3
+(ChC2)
4
C
5
+
C
6
(+Ch1)
C
7
+(Ch2)
C
8
1ȝ 1ȝ 1 ȝ 0.33ȝ 10ȝ 10ȝ 10ȝ
C
9
0.33ȝ
+(Ch1)
C
10
1ȝ
+(Ch2)
C
11
1ȝ
+(Ch1)
C
12
1ȝ
+(Ch2)
C
13
1Ԝ
+(Ch1) (+Ch2) R
C
14
1ȝ 1ȝ
C
16
RC
Tuner
SAP
Tuner1 Tuner2
330k 4.7ȝ 330k 4.7ȝ
CAP1 SAP_O Tuner1_0 Tuner2_0 CAP2 EXT1 1 EXT1 2 EXT2 1 EXT2 2 EXT3 1 EXT3 2 DET1 DET2
Unit
R : [Ԉ]
C : [F]
Fig.1 Example of application circuit (BD3822FS)
5/8

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