TECHNICAL NOTE
Video/Audio Interfaces for TV and DVD Recorders
NTSC-PAL Audio I/O Interface for Recording/Playing
BD3822FS, BD3824FS
Description 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.
Features 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.
Applications DVD recorder
Product lineup Function Volume function 1/2 power compression amp Line amp Circuit current (mA) Output noise (μVrms) BD3822FS Available Available 7 3.2 BD3824FS Available 6.4 2.3
BD3822FS is an upstream compatible IC with BD3824FS.
Ver.B Oct.2005
Absolute maximum ratings (Ta=25 C) Parameter Applied voltage Input voltage Power Dissipation Operating temperature Storage temperature Symbol VCC VIN Pd Topr Tastg Limits 10.0 VCC+0.3 GND-0.3 950
*1
Unit V V mW C C
-40 +85 *2 -55 +150
*1 Reduced by 7.6 mW/ C at 25 C or higher. Thermal resistance ja = 131.6 (°C/W), when Rohm standard board is mounted. 3 Rohm standard board : Size: 70 70 1.6 (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.
Operating range (Basic operation at Ta 25 C) Parameter Power Supply voltage *3 Symbol VCC Min. 7.0 Typ. Max. 9.5 Unit 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
Electric characteristics BD3822FS (Unless specified: Ta=25 , VCC=9V, f=1kHz, VIN=1Vrms, Rg=600 , RL=10k ,Gain Amp=0dB,Volume=0dB, Input terminal=Front1,Output Terminal=OUT1) Parameter Circuit current upon no signal Standby current Voltage gain Maximum output voltage GENERAL Channel balance Total harmonic distortion Output noise voltage * Residual noise voltage * Cross-talk between channels * Input impedance Maximum input voltage INPUT Cross-talk between selector Tuner gain Output offset voltage Volume control range VOLUME Maximum attenuation Step resolution 1 Step resolution 2 Attenuation set error 1 Attenuation set error 2 Minimum gain GAIN AMP Maximum gain Step resolution Gain set error MUTE Symbol IQ IOFF GV VOM CB THD VNO VNOR CTC RIN VIM CTS GTU VDC VV1 GV MIN1 GV STEP1 GV STEP2 GV ERR1 GV ERR2 GMIN G MAX G STEP G ERR Limits Min. -1.5 2.0 -1.5 77 2.1 10 -20 -81 -2 -3 -1.5 4.5 -1.5 Typ. 7 540 0 2.5 0
0.0015
Max. 30 1000 1.5 1.5 0.05 16 10 -80 143 -80 14 20 -75 -85 2 3 1.5 7.5 1.5
Unit mA μA dB Vrms dB % μVrms μVrms dB k Vrms dB dB mV dB dB dB dB dB dB dB dB dB dB VIN=0Vrms
Conditions
Power OFF MODE GV=20log(VOUT/VIN) 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 = 0 , BW=IHF-A Volume = - dB,Rg = 0 , BW=IHF-A Rg = 0 *1) VIM at THD(VOUT)=1% BW=400-30KHz *1) Rg = 0 BW = IHF-A CTS=20log(VOUT/VIN) Tuner gain=12dB, VIN=0.25Vrms G=20log(VOUT/VIN) Tuner SAP Front1 GV=20log(VOUT/VIN),BW = IHF-A Volume = - dB, BW = IHF-A GV=20log(VOUT/VIN) Volume=0 -46dB Volume=-46 -78dB Volume=0 -58dB Volume=-60 -78dB Gain Amp=0dB,G=20log(VOUT/VIN) Gain Amp=6dB,VIN=500mVrms G=20log(VOUT/VIN) 4.6dB to 5.6dB Mute ON GMUTE=20log(VOUT/VIN) BW = IHF-A Volume=- dB, or -78dB Suppression level is set to -3dBV. Suppression level is set to -5dBV. Suppression level is set to -7dBV. VIN =0dBV VIN =+6dBV VIN =-10dBV VIN =-10dBV VIN =-30 -6dBV BW = IHF-A
3.2 2 -110 110 2.5 -110 12 0 -78 -106 1 2 0 0 0 6 0.2 0
Mute attenuation
GMUTE
-
-110
-85
dB
ALC
ALC I/O level 1 ALC I/O level 2 ALC I/O level 3 Output offset voltage DC maximum output voltage DC standard output voltage DC voltage difference between channels DC output voltage linearity
ALC1 ALC2 ALC3 VDC OFF VDC MAX VDC ST VDC
2.9 1.1 -250
-3 -5 -7 30 3.7 1.5 0
0 -2 -4 100 1.9 250 1.9
dBV dBV dBV mV V V mV V
VDC/ 0.9 1.4 VIN *1: 1) Refers to 1,2,3,9,10,11,12,13,14,25,26,31,32 pin terminals.
Square-Law Compression Amp
3/8
Electric characteristics BD3824FS (Unless specified: Ta=25 , VCC=9V, f=1kHz, VIN=1Vrms, Rg=600 , RL=10k ,Gain Amp=0dB,Volume=0dB, Input terminal=Front1,Output Terminal=OUT1) Parameter Circuit current upon no signal Standby current Voltage gain Symbol IQ IOFF GV Limits Min. -7.6 Typ. 6.4 940 -6.1 Max. 19.2 1760 -4.6 Unit mA μA dB VIN=0Vrms Power OFF MODE GV=20log(VOUT/VIN), RL2=10k Output terminal = OUT1/OUT2, RL2=10k VOM at THD(VOUT)=1% Gain Amp=5dB, BW=400-30kHz Output terminal=RF OUT VOM at THD(VOUT)=1% ALC=OFF, RL2=10k BW=400-30kHz Output terminal= LINE OUT1/LINE OUT2 VOM at THD(VOUT)=1% RL1=4.7k External LPF Gvc=6dB BW=400-30kHz CB = GV1-GV2 GV1:ch1Gain GV2:ch2 Gain VIN=2Vrms,BW=400-30KHz Rg = 0 , BW=IHF-A Rg = 0 ,BW = IHF-A *2) VIM at THD(VOUT)=1% BW=400-30KHz*2) Rg = 0 ,BW = IHF-A CTS=20log(VOUT/VIN) Tuner gain=12dB VIN=0.25Vrms, G=20log(VOUT/VIN) Tuner1 Front1, 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) Suppression level is set to -3dBV. Suppression level is set to -5dBV. Conditions
Maximum output voltage 1
VOM1
1.68
2.1
-
Vrms
GENERAL
Maximum output voltage 2
VOM2
2.0
2.5
-
Vrms
Maximum output voltage 3
VOM3
2.2
2.5
-
Vrms
Channel balance Total harmonic distortion Output noise voltage * Cross-talk between channels * Input impedance Maximum input voltage INPUT Cross-talk between selector *
CB THD VNO CTC RIN VIM CTS
-1.5 77 2.1 -
0
0.0015
1.5 0.05 11.5 -80 143 -80
dB % μVrms dB k Vrms dB
2.3 -100 110 2.5 -105
Tuner gain
GTU
10
12
14
dB
Output offset voltage GAINAMP Minimum gain Maximum gain
VDC GMIN GMAX
-20 -1.5 3.5
0 0 5
20 1.5 6.5
mV dB dB
RF MUTE
Mute attenuation ALC I/O level 1
GMUTE
-
-110 -3 -5
-85 0 -2
dB dBV dBV
ALC1 ALC2
ALC 1. 2. 3. 4.
ALC I/O level 2 ALC I/O level 3
-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.
4/8
Example of application circuit
Front1
Front2 10
DVD
A/D 10 + C21 2.2M 4.7 10 + C20 28 R 27 C19 D/A
LINE OUT RF OUT C15 1 + C18 1 + C17 25 10 + C16 24 23
SDA
SCL
Power ON/OFF DC2
DC1
+ 32
C24 + C23
(Ch1)
1
1
R4 10 22 GND I2C BUS LOGIC 21 20 19
47k 18 17
(Ch2)
31
30 C22 29
26
VCC
0,4.6,4.8,5.0,5.2,5.4,5.6,6.0dB
VCC ALC 1/2VCC
Power ON/OFF
VOL 0 -78dB, dB
VOL 0 - 78dB,dB
2 AMP
INPUT SELECTOR
8,12dB
1 C1 + 1 C2
2 + 1
(Ch1)
3 C3 +
(Ch2)
4 C4 C5 0.33
5 + 10 C6
6
(Ch1)
7 + C7 +
(Ch2)
8 C8 C9 0.33
9 +
(Ch1)
10 C10 + 1
(Ch2)
11 C11 + 1
(Ch1)
12 C12 + 1
(Ch2)
13 C13 +
(Ch1)
14
(Ch2) R
15 C R
16 C
C14
+
1
10
10
1
1
1
330k 4.7 330k 4.7
Tuner Tuner1 Tuner2 SAP
CAP1 SAP_O Tuner1_0 Tuner2_0 CAP2 EXT1 1 EXT1 2 EXT2 1 EXT2 2 EXT3 1 EXT3 2
DET1
DET2
Unit R:[ ] C : [F]
Fig.1 Example of application circuit (BD3822FS)
5/8
Example of application circuit
DVD
A/D Front1 Front2 VCC 1 +C28
(Ch1)
D/A LINE LINE C17 OUT2 C20 OUT1 +1 +1 OUT2 C16 R5 R2 C23 10 +10 + 10 R7 R3 R4 R6 + C24 C21 C18 C22 C19 24 25 26 27 28 FILTER GND C 15 SDA SCL
VCC Power OFF RF SELECT OUT
OUT1 C26 10 10 + C
25
1 +C27
(Ch2)
10 + 22 GND 21 20 19 18 C 14 17
10 23
32
31
30
0,5dB
29
0,5dB
VCC
VCC
+
1/2VCC
I2C BUS LOGIC
Power OFF
-6.1dB
-6.1dB INPUT SELECTOR
ALC
0,8,12dB 0,8,12dB
1 N.C. C
1
2
(Ch1)
3 + +
4
5 N.C. C3 10
6
(Ch1)
7
(Ch2)
8 + + 1
9 +
(Ch1)
10 +
(Ch2)
11 +
(Ch1)
12 +
(Ch2)
13 +
(Ch1)
14 + R1 1
(Ch2)
15 C + 12
2.2M 4.7
16 C13 +
4.7
(Ch2) N.C.
C2
+
C
4
C5
C6
C7
C8
C9 1
C10
C 11
1
1
10
1
1
1
1
Tuner1 Tuner2
Tuner1_0Tuner2_0 CAP1 EXT11
EXT12 EXT21 EXT22 EXT31 EXT32
RF BIAS
Unit
Fig.2 Example of application circuit (BD3824FS) Reference data
10 QUIESCENT CURRENT : IQ [mA] QUIESCENT CURRENT : IQ[mA] 10 5 TOTAL HARMONIC DISTORTION : THD+N[%] 1
R:[ ] C : [F]
8
8
85C
6
85C 25C -40C
6
0.1
25C -40C
4
4
85C
0.01
2
2
25C -40C
0.001
0 0 2 4 6 8 10 SUPPLY VOLTAGE : VCC[V]
0 0 2 4 6 8 10 SUPPLY VOLTAGE : VCC[V]
0.0001
1m
10m
100m
1
3
OUTPUT VOLTAGE : VOUT[Vrms]
Fig.3 Quiescent current vs Supply voltage (BD3822FS)
Fig.4 Quiescent current vs Supply voltage (BD3824FS) 6/8
Fig.5 Total harmonic distortion vs Output voltage (BD3822FS)
5 TOTAL HARMONIC DISTORTION : THD+n 1 VOLTAGE GAIN : GV [dB]
85C 25C -40C
+10 +8 VOLTAGE GAIN : GV [dB] +6 +4 +2 0 -2 -4 -6 -8
0 -4
0.1
-8
0.01
-12
0.001
-16
0.0001
1m
10m
100m
1
3
-10 10 100 1k 10k 100k FREQUENCY : f [Hz]
-20 10
100
1k
10k
100k
OUTPUT VOLTAGE : VOUT [Vrms]
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)
1 MAXIMUM OUTPUT VOLTAGE : VOUT[Vrms] 5 OUTPUT VOLTAGE : VOUT [Vrms] OUTPUT VOLTAGE : VOUT [V] 5 4 3
100m
-3dBV
2
3
10m
-5dBV -7dBV
2
1
1m
1
100u 1m
0 10m 100m 1 5 0 500m 1 1.5 2 2.5 INPUT VOLTAGE : VIN [Vrms] INPUT VOLTAGE : VIN [Vrms]
0 100
1000
10000
100000
LOAD RESISTANCE : RL [Hz]
Fig.9 ALC I/O characteristic (BD3822FS) Operation Notes 1. 2.
Fig.10 Square-Low Compression amp I/O characteristic (BD3824FS)
Fig.11 Output load characteristic (BD3822FS, BD3824FS)
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
Selection of order type
B
D
3
8
Part No.
2
2
F
S
E
2
Tape and Reel information
BD3822FS BD3824FS
SSOP-A32
Tape Quantity
13.6 ± 0.2
32 17
Embossed carrier tape 2000pcs E2
(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)
1.8 ± 0.1 7.8 ± 0.3 5.4 ± 0.2
1
16
0.15 ± 0.1 0.1
0.11
0.3Min.
Direction of feed
1234
1234
1234
1234
1234
1234
1234
1234
0.8
0.36 ± 0.1
Unit:mm)
Reel
1pin
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.
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Appendix1-Rev2.0
