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. THE AMERICAS / EUROPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0