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TECHNICAL NOTE
Video / Audio Interfaces for TV and DVD Recorders
NTSC-PAL Audio I/O Interface for Recording
BD3823FV
Description BD3823FV is a low-noise (3.2Vrms), low distortion (0.0015%), 5ch selector, incorporating a resistor-ladder type volume. Because of a wide power supply voltage range (7V to 14.5V), BD3823FV can meet a wide input voltage (to 4.5 Vms), and high S/N can be achieved. In addition, the built-in volume does not add any distortion ratio characteristics, even when the attenution is varied, and is applicable for high-quality audio systems. Features 1) A resistor-ladder type volume circuit is with a low distortion ratio (0.0015% with volume set to -6dB) and low noise (3.2 Vrms with volume set to -6dB). 2) By grouping sound input terminals with output terminals, the PCB layout is reduced. 3) Small package SSOP - B20 achieves good crosstalk characteristicss (-110 dB). 4) The use of Bi-CMOS process enables low current consumption and energy saving design. Because of low current consumption, BD3823FV has the advantage in quality over the scaling down of the internal regulators and heat controls. Applications DVD recorders Absolute maximum rating (Ta=25C) Parameter Symbol Limits Unit VCC 15.0 Applied Voltage V SCL, SDA 7.0 Input voltage VIN V VCC+0.3 GND-0.3 Power Dissipation Pd 810 *1 mW Operating Temperature Topr C -40 +85 *2 Storage Temperature Tastg C -55 +150 *1 Reduced by 6.5 mW/ C at 25 C or higher. Thermal resistance ja = 154 (C/W), when Rohm standard board is mounted. Rohm standard board: Size: 70 70 1.6 (mm3) 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 ) Parameter Symbol Min. Typ. Max. Unit *3 Power supply voltage VCC 7.0 12.0 14.5 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.
Ver.B Oct.2005
Electrical characteristics Unless otherwise specified, Ta=25 , VCC=12V, f=1kHz, Vin=1Vrms, Rg=600 , RL=10k , Gain selector = 0dB, Volume = 0dB, Input terminal = Front 1, Output terminal = Out 1
Limits Parameter Symbol Min. Circuit Current upon no signal Voltage gain Maximum output voltage Channel balance Total harmonic distortion GENERAL Output noise voltage * Residual output noise voltage * Cross-talk between channels * Input impedance IQ GV VOM CB THD VNO VNOR CTC RIN -1.5 3.0 -1.5 77 Typ. 2.5 0 3.6 0
0.0015
Unit Max. 10 1.5 1.5 0.05 16 10 -80 143 mA B Vrms dB % Vrms Vrms dB k
Conditions
VIN=0Vrms GV=20log(VOUT/VIN) VOM at THD(VOUT)=1% BW=400Hz-30KHz CB = GV1-GV2 GV1:ch1Gain, GV2:ch2 Gain VIN=2Vrms,Volume=-6dB BW=400Hz-30KHz Volume=-6dB Rg = 0 , BW=IHF-A Volume = - dB Rg = 0 , BW=IHF-A Rg = 0 BW = IHF-A 1pin-10pin terminal VIM at THD(VOUT)=1% BW=400Hz-30KHz 1pin-10pin terminal Rg = 0 BW = IHF-A CTS=20log(VOUT/VIN) GV=20log(VOUT/VIN) BW = IHF-A Volume = - dB GV=20log(VOUT/VIN) BW = IHF-A Volume=0 -30.5dB Volume=0 -30.5dB Gain Selector=6dB VIN=500mVrms G=20log(VOUT/VIN) From 2dB to 4dB
3.2 2 -110 110 3.61)
Maximum input voltage
VIM
3.1
-
Vrms
Cross-talk between selectors *
CTS
-
-110
-80
dB
Volume control range
VV
-32.5
-30.5
-28.5
dB
VOLUME
Maximum attenuation *
GV MIN
-
-106
-85
dB
Step resolution Attenuation set error
GV STEP GV ERR
-1.5
0.5 0
1.5
dB dB
GAIN SELECTOR
Maximum gain
G MAX
4.5
6
7.5
dB
Step resolution Gain set error
G STEP G ERR
-1.5
2 0
1.5
dB dB
VP-9690A (average value detection, effective value display) filter by Matsushita Communication is used for * measurement. Phase between input/output is the same. This IC is not designed to be radiation-resistant. 1)VIM=2.5Vrms(TYP) at VCC=9V THD(VOUT)=1% VIN=4.2Vrms(TYP) at VCC=14V THD(VOUT)=1%
2/8
Timing chart Electrical specifications and timing of bus lines and I/O stages
Fig.1 Timing Definition on I2C BUS
2 Table 1 . Characteristics of the SDA and SCL BUS lines for I C BUS devices
Parameter 1 2 3 4 5 6 7 8 9 10 11 12 SCL clock frequency Bus free time between a STOP and START condition Hold time (repeated) START condition. After this period, the first clock pulse is generated LOW period of the SCL clock HIGH period of the SCL clock Set-up time for a repeated START condition Data hold time Data set-up time Rise time of both SDA and SCL signals Fall time of both SDA and SCL signals Set-up time for STOP condition Capacitive load for each bus line
Symbol fSCL tBUF tHD;STA tLOW tHIGH tSU;STA tHD;DAT tSU; DAT tR tF tSU;STO Cb
High speed mode I2C BUS Min. 0 1.3 0.6 1.3 0.6 0.6 0* 100 20+Cb 20+Cb 0.6 Max. 400 300 300 400
Unit kHz s s s s s s ns ns ns s pF
The above numerical values all correspond to VIH min and VIL max levels (see Table 2). *The input signals must internally provide at least 300 ns hold-time for SDA signals (at VIH min of SCL signals) in order to cross over undefined region at the fall-end of SCL. Table 2. Characteristics of the SDA and SCL I/O stages for I C BUS devices High speed mode Parameter Symbol I2C BUS Min. Max. -0.5 2.3 n/a 0 0 20+0.1Cb -10 1.0 n/a 50 0.4 250 10 10 Unit
2
13 14 15 16 17 18 19 20
Low-level input voltage : fixed input levels Low-level input voltage : fixed input levels Hysteresis of Schmitt trigger inputs: fixed input levels Pulse width of spikes which must be suppressed by the input filter. Low-level output voltage (open drain): at 3mA sink current Output fall time from VIHmin. to VIHmax. with a bus capacitance from 10 pF to 400pF: with up to 3mA sink current at VOL1 Input current each I/O pin with an input voltage between 0.4V and 0.9 VCCmax. Capacitance for each I/O pin
VIL
VIH
V s V ns V ns A pF
Vhys
tSP VOL1 tOF Ii Ci
n/a = not applicable
3/8
2 I C BUS FORMAT
MSB S 1bit S 8bit
LSB Slave Address 1bit
MSB A 8bit
LSB Select Address
MSB A 1bit
LSB Data 8bit A P 1bit 1bit
= Start condition (Recognition of start bit) Least significant bit is "L" for writing.
Slave Address = Recognition of slave address. 7 bits in upper order are voluntary. A Select Address Data P = ACKNOWLEDGE bit (Recognition of acknowledgement) Selection of volume, etc. Data such as volume, etc. = Stop condition (Recognition of stop bit)
I2C BUS Interface Protocol 1 Basic form S MSB 2 Slave Address LSB A Select Address MSB LSB A Data A MSB LSB P
Automatic increment (Select Address increases (+1) according to the number of data. S Slave Address A Select Address A MSB LSB MSB LSB MSB Data1 LSB A MSB Data2 LSB A MSB LSB DataN A P
[1] Data 1 shall be set as data of address specified by Select Address. [2] Data 2 shall be set as data of address specified by Select Address +1. [3] Data N shall be set as data of address specified by Select Address +N-1.
Slave Address Because the slave address can be changed by the SELECT setting, it is possible to use two chips simultaneously on a single control BUS . MSB LSB SELECTvoltage condition A6 A5 A4 A3 A2 A1 A0 R/W GND 0.2xVCC 1 0 0 0 0 0 0 0 0.8xVCC VCC 1 0 0 0 0 1 0 0 Set the SELECT voltage within the condition defined. Data format Select Address (HEX) 00 01 02 03 MSB D7 D6 D5 Data D4 D3 D2 D1 Input Selector LSB D0
Items to be set Input Selector Volume ch1 Volume ch2 Gain Selector *Don't care
* * * *
* * * *
*
*
*
Volume attenuation ch1 Volume attenuation ch2
*
*
*
*
Gain Selector
4/8
Application circuit diagram
VCC
DVD
A/D
SELECT OUT1 OUT2 VCC VRR FILTER AGND SCL SDA DGND
80HEX 84HEX
10 10 10
10 10
VCC Regulator
AGND
I2C LOGIC
DGND
1/2VCC
0
-30.5dB/0.5dB step -
0
-30.5dB/0.5dB step -
GAIN SELECTOR 0, 2, 4, 6dB
INPUT
1
1
1
1
1
1
1
1
1
1
Front1
Front2
Tuner1
Tuner2
EXT11
EXT12
EXT21
EXT22
EXT31
EXT32
Fig.2 Application Circuit Diagram Pin No. Pin Name 1 2 3 4 5 6 7 8 9 10 Front1 Front2 Pin Description Front 1ch input terminal Front 2ch input terminal Pin No. 11 12 13 14 15 16 17 18 19 20 Pin Name DGND SDA SCL AGND Pin Description Ground ternial I2C communication data terminal I C communication clock terminal Ground terminal
2
Tuner1 Tuner 1 ch input Tuner2 Tuner 2 ch input EXT11 External 1 1ch input terminal EXT12 External 1 2ch input terminal EXT21 External 2 1ch input terminal EXT22 External 2 2ch input terminal EXT31 External 3 1ch input terminal EXT32 External 3 2ch input terminal
FILTER 1/2VCC terminal VRR VCC OUT2 OUT1 Ripple filter terminal Power supply terminal Volume 2ch output terminal Volume 1ch output terminal
SELECT Slave address selection terminal
5/8
Reference data
-30dB -20dB -10dB 0dB
85C 25C -40C
85C 25C -40C
VOUT=VARIABLE f=1kHz FILTER=DIN AUDIO
VOUT=VARIABLE f=1kHz FILTER=DIN AUDIO
Fig.3 Quiescent Current vs. Power Supply
Fig.4 Total harmonic distortion vs. Output Voltage
Fig.5 Total harmonic distortion vs. Output voltage
VCC=14.5V VCC=12V VCC=7V
VOUT=VARIABLE f=1kHz
VIN=1[Vrms] FILTER=LPF 80[kHz]
VIN=1[Vrms] FILTER=NONE
Fig.6 Total harmonic distortion vs. Output voltage
VIN=100[mVrms] FILTER=NONE
Fig.7 Total harmonic distortion vs. Frequency
VIN=1[Vrms] FILTER=NONE 0dB -3dB, 0.5dB/step
Fig.8 Voltage gain vs. Frequency
6dB
4dB
2dB
0dB -5dB -30dB, 5dB/step VIN=1[Vrms] FILTER=LPF(30[kHz])
Fig.9 Gain selector voltage gain vs. Frequency
Rg=0[ ] FILTER=DIN AUDIO
Fig.10 Volume attenuation vs. Frequency
VIN=1[Vrms] FILTER=LPF(80[kHz])
Fig.11 Maximum volume attenuation vs. Frequency
VCC=12[V] f=1 [kHz]
2ch 1ch
1ch 2ch
Fig.12 Volume attenuation vs. voltage attenuation
Fig.13 Cross Talk vs. Frequency
Fig.14 Maximum output voltage vs. Load resistance
6/8
How to select application parts Initial condition when power supply (17 pin) is turned ON A circuit that carries out initialization in IC, when power supply (17 pin) is turned ON is incorporated. Settings are as shown in the following table. However, it is recommended to transmit the data to all the addresses as initial data when power is turned ON, and to apply mute while the initial data is input Parameter
VCC rise time VCC voltage when power on reset is released. Function Input Selector Volume Gain SERECTOR
Symbol
Trise Vpor
Limits Min.
20 -
Typ.
2.6
Max.
-
Unit
S V
Conditions
VCC rise time from 0V to 3V
Initial Condition Input MUTE - dB 0dB
Signal input section 1) Setting for input coupling capacitor In the signal input terminal, set the constant for the input coupling capacitor C(F), taking the input impedance RIN ( ) inside into account. This makes up the primary HPF characteristics of the RC. CF
GAIN[dB
0 RIN A(f) SSH F Hz
Input terminal
Fig.15 Sigal input section
2) SHORT mode of input SHORT mode is a command to reduce resistance by setting impedance RIN to switch SSH ON. When SHORT command is not chosen, switch SSH is turned OFF. By using this command, it is possible to stop charging externally mounted coupling capacitor C. Use SHORT mode when there is no signal since the SHORT mode turns ON the SSH switch in order to achieve low impedance. Operation Notes 1. 2. 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.
3.
4.
5.
6.
7.
7/8
Selection of order type
B
D
3
8
2
3
F
V
E
2
Part No. BD3823FV
Tape and Reel information
SSOP-B20

Tape Quantity
6.5 0.2
6.4 0.3 1.15 0.1 4.4 0.2 0.1 0.3Min.
20 11
Embossed carrier tape 2500pcs 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)
Direction of feed
1
10
0.15 0.1 0.1
0.65 0.22 0.1
1234
Reel
1234
1234
1pin
1234
1234
1234
Direction of feed
Orders are available in complete units only.
1234
1234
Unit:mm)
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
Catalog No.05T397Be '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.
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Appendix1-Rev2.0

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