ROHM BD3822FS

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.
2
7) I C 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
BD3824FS
Volume function
Available
-
1/2 power compression amp
Available
-
Line amp
-
Available
Circuit current (mA)
7
6.4
3.2
2.3
Output noise (μVrms)
BD3822FS is an upstream compatible IC with BD3824FS.
Ver.B Oct.2005
ƔAbsolute maximum ratings (Ta=25qC)
Parameter
Symbol
Limits
Unit
Applied voltage
VCC
10.0
V
Input voltage
VIN
VCC+0.3̻GND-0.3
V
Power Dissipation
Pd
950
*1
mW
Operating temperature
Topr
-40̻+85 *2
qC
Storage temperature
Tastg
-55̻+150
qC
*1 Reduced by 7.6 mW/qC at 25qC or higher.
Thermal resistance Tja = 131.6 (°C/W), when Rohm standard board is mounted.
3
Rohm standard board : Size: 70͙70͙1.6 (mm )
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 Ta͛25qC)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Power Supply voltage *3
VCC
7.0
-
9.5
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.
2/8
ALC
MUTE
GAIN AMP
VOLUME
INPUT
GENERAL
Ɣ Electric characteristics BD3822FS
(Unless specified: Ta=25ͨ, VCC=9V, f=1kHz, VIN=1Vrms, Rg=600Ԉ, RL=10kԈ,Gain Amp=0dB,Volume=0dB,
Input terminal=Front1,Output Terminal=OUT1)
Parameter
Symbol
Circuit current upon no signal
IQ
Min.
Typ.
Max.
-
7
30
Unit
mA
Conditions
VIN=0Vrms
Standby current
IOFF
-
540
1000
μA
£Power OFF¤ MODE
Voltage gain
GV
-1.5
0
1.5
dB
GV=20log(VOUT/VIN)
Maximum output voltage
VOM
2.0
2.5
-
Vrms
Channel balance
CB
-1.5
0
1.5
dB
Total harmonic distortion
THD
-
0.0015
0.05
%
Output noise voltage *
VNO
-
3.2
16
μVrms
Residual noise voltage *
VNOR
-
2
10
μVrms
Cross-talk between channels *
CTC
-
-110
-80
dB
Rg = 0Ԉ̜BW = IHF-A
Input impedance
RIN
77
110
143
kԈ
*1)
Maximum input voltage
VIM
2.1
2.5
-
Vrms
Cross-talk between selector
CTS
-
-110
-80
dB
Tuner gain
GTU
10
12
14
dB
Output offset voltage
VDC
-20
0
20
mV
Tuner SAPΦFront1
Volume control range
VV1
-81
-78
-75
dB
GV=20log(VOUT/VIN),BW = IHF-A
Maximum attenuation
GV MIN1
-
-106
-85
dB
Volume = -͡dB, BW = IHF-A
GV=20log(VOUT/VIN)
Step resolution 1
GV STEP1
-
1
-
dB
Volume=0̻-46dB
Step resolution 2
GV STEP2
-
2
-
dB
Volume=-46̻-78dB
Attenuation set error 1
GV ERR1
-2
0
2
dB
Volume=0̻-58dB
Attenuation set error 2
GV ERR2
-3
0
3
dB
Volume=-60̻-78dB
Minimum gain
GMIN
-1.5
0
1.5
dB
Gain Amp=0dB,G=20log(VOUT/VIN)
Maximum gain
G MAX
4.5
6
7.5
dB
Gain Amp=6dB,VIN=500mVrms
G=20log(VOUT/VIN)
Step resolution
G STEP
-
0.2
-
dB
4.6dB to 5.6dB
Gain set error
G ERR
-1.5
0
1.5
dB
VOM at THD(VOUT)=1%
BW=400-30KHz
CB = GV1-GV2
GV1:ch1Gain GV2:ch2 Gain
VIN=2Vrms,Volume=-12dB
Gain Amp=5.6dB,BW=400-30KHz
Volume=-12dB,Gain Amp=5.6dB
Rg = 0Ԉ, BW=IHF-A
Volume = -͡dB,Rg = 0Ԉ, BW=IHF-A
VIM at THD(VOUT)=1%
BW=400-30KHz *1)
Rg = 0Ԉ̜BW = IHF-A
CTS=20log(VOUT/VIN)
Tuner gain=12dB, VIN=0.25Vrms
G=20log(VOUT/VIN)
Mute ON
GMUTE=20log(VOUT/VIN)
BW = IHF-A
Volume=-͡dB, or -78dB
Mute attenuation
GMUTE
-
-110
-85
dB
ALC I/O level 1
ALC1
-
-3
0
dBV
Suppression level is set to -3dBV.
ALC I/O level 2
ALC2
-
-5
-2
dBV
Suppression level is set to -5dBV.
ALC I/O level 3
Square-Law
Compression Amp
Limits
ALC3
-
-7
-4
dBV
Suppression level is set to -7dBV.
Output offset voltage
VDC OFF
-
30
100
mV
VIN =0dBV
DC maximum output voltage
VDC MAX
2.9
3.7
-
V
VIN =+6dBV
DC standard output voltage
VDC ST
1.1
1.5
1.9
V
VIN =-10dBV
DC voltage difference between
channels
ͼVDC
-250
0
250
mV
VIN =-10dBV
1.9
V
ͼVDC/
0.9
1.4
ͼVIN
*1: 1) Refers to 1,2,3,9,10,11,12,13,14,25,26,31,32 pin terminals.
DC output voltage linearity
3/8
VIN =-30̻-6dBV
Ɣ Electric characteristics BD3824FS
(Unless specified: Ta=25ͨ, VCC=9V, f=1kHz, VIN=1Vrms, Rg=600Ԉ, RL=10kԈ,Gain Amp=0dB,Volume=0dB,
Input terminal=Front1,Output Terminal=OUT1)
Parameter
GENERAL
INPUT
GAINAMP
Conditions
Max.
IQ
-
6.4
19.2
mA
VIN=0Vrms
Standby current
IOFF
-
940
1760
μA
͐Power OFF͑ MODE
Voltage gain
GV
-7.6
-6.1
-4.6
dB
GV=20log(VOUT/VIN), RL2=10kԈ
Output terminal =
OUT1/OUT2, RL2=10kԈ
VOM at THD(VOUT)=1%
Gain Amp=5dB,
BW=400-30kHz
Output terminal=RF OUT
VOM at THD(VOUT)=1%
ALC=OFF, RL2=10kԈ
BW=400-30kHz
Output terminal=
LINE OUT1/LINE OUT2
VOM at THD(VOUT)=1%
RL1=4.7kԈ
External LPF Gvc=6dB
BW=400-30kHz
CB = GV1-GV2
Maximum output voltage 1
VOM1
1.68
2.1
-
Vrms
Maximum output voltage 2
VOM2
2.0
2.5
-
Vrms
Maximum output voltage 3
VOM3
2.2
2.5
-
Vrms
CB
-1.5
0
1.5
dB
Total harmonic distortion
THD
-
0.0015
0.05
%
Output noise voltage *
VNO
-
2.3
11.5
μVrms
Rg = 0Ԉ, BW=IHF-A
Cross-talk between channels *
CTC
-
-100
-80
dB
Rg = 0Ԉ,BW = IHF-A
Input impedance
RIN
77
110
143
kԈ
*2)
Maximum input voltage
VIM
2.1
2.5
-
Vrms
GV1:ch1Gain GV2:ch2 Gain
VIN=2Vrms,BW=400-30KHz
VIM at THD(VOUT)=1%
BW=400-30KHz*2)
Rg = 0Ԉ,BW = IHF-A
Cross-talk between selector *
CTS
-
-105
-80
dB
Tuner gain
GTU
10
12
14
dB
Output offset voltage
VDC
-20
0
20
mV
Minimum gain
GMIN
-1.5
0
1.5
dB
Maximum gain
GMAX
3.5
5
6.5
dB
Mute attenuation
GMUTE
-
-110
-85
dB
ALC I/O level 1
ALC1
-
-3
0
dBV
Suppression level is set to -3dBV.
ALC I/O level 2
ALC2
-
-5
-2
dBV
Suppression level is set to -5dBV.
CTS=20log(VOUT/VIN)
Tuner gain=12dB
VIN=0.25Vrms,
G=20log(VOUT/VIN)
Tuner1ΦFront1,
Tuner Gain = 8dB
Gain Amp=0dB
G=20log(VOUT/VIN)
Gain Amp=5dB,VIN=500mVrms
G=20log(VOUT/VIN)
Mute ON, BW = IHF-A
GMUTE=20log(VOUT/VIN)
-7
-4
dBV
Suppression level is set to -7dBV.
ALC3
*2) Refers to 2,3,9,10,11,12,13,14,31,32pin terminals.
VP-9690A (Average value detection, effective value display) IHF-A filter by Matsushita Communication is used fo measurement.
Phase between input/output is the same.
This IC is not designed to be radiation-resistant.
ALC I/O level 3
1.
2.
3.
4.
Unit
Typ.
Channel balance
RF MUTE
Limits
Min.
Circuit current upon no signal
ALC
Symbol
4/8
ƔExample of application circuit
Front1
Front2
A/D
10ȝ
+
C24 + C23
(Ch1)
32
(Ch2)
31
+
C20
30 C22 29
SCL
Power
ON/OFF DC2
26
25
R4
10ȝ
+
C16
1ȝ
+
C17
24
47k
10ȝ
23
21
22
19
20
18
I2C BUS
LOGIC
0,4.6,4.8,5.0,5.2,5.4,5.6,6.0dB
ALC
1/2VCC
Power
ON/OFF
VOL
0̻ -78dB, - ͡ dB
17
GND
VCC
VCC
VOL
DC1
C15
1ȝ
+
C18
C19
28 R 27
SDA
RF
OUT
D/A
2.2M 4.7ȝ
10ȝ
10ȝ
+
C21
1ȝ
1ȝ
LINE
OUT
DVD
2 AMP
0̻ - 78dB,- ͡dB
INPUT SELECTOR
8,12dB
1
C1
2
+
1ȝ
3
(Ch1)
C2
+
1ȝ
C3
4
5
(Ch2)
+
1ȝ
C4
C5
0.33ȝ
6
+
10ȝ
7
(Ch1)
C6
+
C7
10ȝ
8
9
(Ch2)
+
C8
10ȝ
10
(Ch1)
C9
0.33ȝ
+
1ȝ
C10
11
(Ch2)
+
1ȝ
C11
12
(Ch1)
+
C12
1ȝ
13
(Ch2)
+
C13
1Ԝ
14
(Ch1)
+
1ȝ
C14
15
(Ch2) R
+
16
C
R
C
1ȝ
330k 4.7ȝ 330k 4.7ȝ
Tuner Tuner1 Tuner2
SAP
CAP1 SAP_O Tuner1_0 Tuner2_0 CAP2 EXT1 1 EXT1 2 EXT2 1 EXT2 2 EXT3 1 EXT3 2
DET2
DET1
Unit
R : [Ԉ]
C : [F]
Fig.1 Example of application circuit (BD3822FS)
5/8
ƔExample of application circuit
DVD
A/D
Front2
Front1
OUT1
VCC
C26
10ȝ
1ȝ
+C27
1ȝ
+C28
+
C
25
(Ch2)
(Ch1)
32
10 ȝ
31
30
29
0,5dB
VCC
D/A
LINE
LINE
C17 OUT2
C20
FILTER GND
OUT1
+1ȝ
+1ȝ
OUT2
C16
R5
R2
C23
10ȝ
C 15
+10ȝ
+
10ȝ
R7
R3 R4
R6
+C
10 ȝ
24
C21 C18
C22
C19
24
23
22
25
26
27
28
SDA
Power
OFF
SCL
RF SELECT
OUT
10 ȝ
+
21
19
20
C 14
18
17
15
16
0,5dB
GND
VCC
VCC
1/2VCC
+
-6.1dB
I2C BUS
LOGIC
Power
OFF
ALC
-6.1dB
INPUT SELECTOR
0,8,12dB
0,8,12dB
1
2
3
(Ch1)
N.C.
C
+
1
C2
5
4
(Ch2) N.C.
+
C3
+
C
+
C5
4
10ȝ
10ȝ
Tuner1 Tuner2
8
(Ch2)
(Ch1)
N.C.
1ȝ
1ȝ
7
6
9
+
10
(Ch1)
C6
+
1ȝ
(Ch2)
+
C7
C8
1Ԝ
1ȝ
Tuner1_0Tuner2_0 CAP1 EXT11
11
12
(Ch1)
+
13
(Ch2)
+
C9
1Ԝ
C10
1ȝ
14
(Ch1)
+
C 11
1ȝ
(Ch2)
+C12
C13
+
2.2M 4.7ȝ
4.7ȝ
+ R1
1ȝ
RF BIAS
EXT12 EXT21 EXT22 EXT31 EXT32
Unit
R : [Ԉ]
Fig.2 Example of application circuit (BD3824FS)
C : [F]
ƔReference data
8
6
85C
4
25C
-40C
2
0
8
6
4
85C
2
25C
-40C
0
0
2
4
6
8
10
0
2
4
6
8
10
TOTAL HARMONIC DISTORTION : THD+N[%]
5
10
QUIESCENT CURRENT : IQ[mA]
QUIESCENT CURRENT : IQ [mA]
10
1
85C
0.1
25C
-40C
0.01
0.001
0.0001
1m
10m
100m
1
3
SUPPLY VOLTAGE : VCC[V]
SUPPLY VOLTAGE : VCC[V]
OUTPUT VOLTAGE : VOUT[Vrms]
Fig.3 Quiescent current vs
Supply voltage (BD3822FS)
Fig.4 Quiescent current vs
Supply voltage (BD3824FS)
Fig.5 Total harmonic distortion vs
Output voltage (BD3822FS)
6/8
+10
0
+8
85C
0.1
25C
-40C
0.01
0.001
+6
VOLTAGE GAIN : GV [dB]
1
VOLTAGE GAIN : GV [dB]
TOTAL HARMONIC DISTORTION : THD+n
5
+4
+2
0
-2
-4
-6
-4
-8
-12
-16
-8
0.0001
1m
10m
100m
1
-20
10
-10
3
10
100
1k
10k
100k
FREQUENCY : f [Hz]
OUTPUT VOLTAGE : VOUT [Vrms]
100
1k
10k
100k
FREQUENCY : f [Hz]
Fig.6 Total harmonic distortion vs
Output voltage (BD3824FS)
Fig.7 Voltage gain vs Frequency
(BD3822FS)
Fig.8 Voltage gain vs Frequency
(BD3824FS)
5
5
3
100m
-3dBV
10m
-5dBV
-7dBV
1m
100u
1m
MAXIMUM OUTPUT VOLTAGE : VOUT[Vrms]
1
OUTPUT VOLTAGE : VOUT [V]
OUTPUT VOLTAGE : VOUT [Vrms]
-
4
3
2
1
0
10m
100m
1
5
INPUT VOLTAGE : VIN [Vrms]
Fig.9 ALC I/O characteristic 㩷 㩷 㩷
(BD3822FS)
0
500m
1
1.5
2
2.5
2
1
0
100
1000
10000
100000
INPUT VOLTAGE : VIN [Vrms]
LOAD RESISTANCE : RL [Hz]
Fig.10 Square-Low Compression amp
I/O characteristic (BD3824FS)
Fig.11 Output load characteristic
(BD3822FS, BD3824FS)
ƔOperation Notes
1.
2.
3.
4.
5.
6.
7.
Numbers and data in entries are representative design values and are not guaranteed values of the items.
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.
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.
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.
Thermal design
Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in actual
states of use.
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.
Operation in strong electromagnetic field
Using the ICs in a strong electromagnetic field can cause operation malfunction.
7/8
ƔSelection of order type
B
D
3
8
2
2
F
S
2
E
Tape and Reel information
Part No.
BD3822FS
BD3824FS
SSOP-A32
<Dimension>
<Tape and Reel information>
16
0.3Min.
1
(Correct direction: 1pin of product should be at the upper left when you hold reel
on the left hand, and you pull out the tape on the right hand)
E2
0.15 ± 0.1
1234
1pin
1234
Reel
1234
̈́Unit:mm)
1234
0.1
1234
0.36 ± 0.1
Direction
of feed
1234
0.8
2000pcs
1234
0.11
17
Embossed carrier tape
1234
1.8 ± 0.1 7.8 ± 0.3
5.4 ± 0.2
13.6 ± 0.2
32
Tape
Quantity
Direction of feed
΀Orders are available in complete units only.
The contents described herein are correct as of October, 2005
The contents described herein are subject to change without notice. For updates of the latest information, please contact and confirm with ROHM CO.,LTD.
Any part of this application note must not be duplicated or copied without our permission.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding
upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams and information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any
warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such
infringement, or arising from or connected with or related to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, implied right or license to practice or commercially exploit any intellectual property rights or other
proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer.
The products described herein utilize silicon as the main material.
The products described herein are not designed to be X ray proof.
Published by
Application Engineering Group
8/8
Catalog NO.05T396Be '05.10 ROHM C 1000 TSU
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
ROHM Customer Support System
www.rohm.com
Copyright © 2008 ROHM CO.,LTD.
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Contact us : [email protected] rohm.co. jp
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Appendix1-Rev2.0