BD3825FS-E2

TECHNICAL NOTE Video/Audio Interfaces for TV and DVD Recorders PAL Audio I/O Interface BD3825FS ٨Description BD3825FS is an audio signal switch IC used for PAL DVD-Recorders. BD3825FS supports six input lines which are 2 controlled by the I C-BUS of video signal LSI BH7624KS2. In addition, BD3825FS has two built-in Function Switch features. ٨Features 1) Vcc = ±5V (for Audio signal), +12V (for Function SW) Audio SW (C-MOS analog switch configuration) 2) 3 inputs - 1output SW, (2 circuits built-in with MUTE function) 3) 2 inputs - 1output SW, (2 circuits built-in with MUTE function) 4) THD (typ.) = 0.007% 5) S/N (typ.) = 90dB 6) Crosstalk (typ.) = 90dB 7) ON resistance (max.) = 300ȍ 8) 2 Function Switch outputs ٨Applications DVD-Recorder, STB, etc. ٨Absolute maximum ratings㧔Ta=25°C㧕 Parameter Symbol Limits Unit Power Supply Voltage1 V1 r6.0 V Power Supply Voltage2 V2 㧗13.5 V Power Dissipation Pd 800 *1 mW Operating Temperature Range Topr -25 㨪 +75 °C Storage Temperature Range Tstg -55 㨪 +125 °C *1 Reduced by 9 mW/qC over 25qC. ٨Operating range (Ta=25°C) Parameter Symbol Limits Unit Supply voltage1 Vcc1 r4.5㨪r5.5 V Supply voltage2 Vcc2 11.5㨪12.5 V Note: This IC is not designed to be radiation-resistant. Ver.B Oct.2005 ٨Electrical characteristics (Unless otherwise specified, Vcc1=±5.0V, Vcc2=12V, Ta=25°C) Limit Item Symbol MIN. TYP. MAX. Unit Conditions 㧨whole㧪 Circuit Current 1 IATYP1 2.5 5.0 7.5 mA Vcc1=±5V Circuit Current 2 IATYP2 5.0 10.0 15.0 mA Vcc2=12V Frequency Characteristic FFC -1.0 0.0 1.0 dB Vin=2Vrms, f=20Hz/100kHz RL=47kȍ Distortion FDIS - 0.007 0.1 % Vin=2.2Vrms, f=1kHz RL=47kȍ S/N FSN 80 90 - dB Vin=2Vrms, f=1kHz No Filter ON Resistance RON - 200 300 ȍ Vin=0V FMUTE - -80 -75 dB Vin=2Vrms, f=1kHz RL=47kȍ ASW1 SW Crosstalk FSWCRS1 - -90 -85 dB Vin=2Vrms, f=1kHz ASW2 SW Crosstalk FSWCRS2 - -90 -85 dB Vin=2Vrms, f=1kHz Between crosstalk channel (AUX_L chЊR ch) FCHCRS1 - -90 -85 dB Vin=2Vrms, f=1kHz Between crosstalk channel (L1_L chЊR ch) FCHCRS2 - -90 -85 dB Vin=2Vrms, f=1kHz FS_AUX,FS_L1 output voltage H VFSOH 10.0 11.0 12.0 V RL=10kȍ FS_AUX,FS_L1 output voltage M VFSOM 5 5.75 6.5 V RL =10kȍ FS_AUX,FS_L1 output voltage L VFSOL 0 0 1.5 V RL =10kȍ ASW1,2,3,4 input voltage H VASWH 2.0 - +Vcc1 V ASW1,2,3,4 input voltage L VASWL 0 - 1.0 V FS_AUX, FS_L1 input voltage H VFSIH 3.9 - +Vcc1 V FS_AUX, FS_L1 input voltage M VFSIM 1.65 - 3.1 V FS_AUX, FS_L1 input voltage L VFSIL 0 - 0.85 V 㧨AUX, L1_R,L OUT㧪 MUTE Attenuation 2/8       67A4A+0 &#A4A+0 .A4A+0 DA_Lch AUX_Lch MUTE DA_Rch AUX_Rch MUTE #7:A.A+0 #7:A4A+0 FS_L1 OUT  1 2 3 1 2 3  #59 #59 1 2 3 4 1 2 3 4 SW1 #7:A.A176 #7:A4A176 .A.A176 .A4A176 DA/AUX FS_AUX OUT 12V H 6.7V (5A.A176 M M (5A.A+0  UVCVGU L L   6.7V  -5V Fig.1 Block Diagram 3/8   TU/DA/L1 SW2 12V H  #59 TU_Lch DA_Lch L1_Lch MUTE TU_Rch DA_Rch L1_Rch MUTE 67A.A+0 &#A.A+0 .A.A+0  (5A#7:A+0  UVCVGU   (5A#7:A176   #59 ٨Block diagram    +5V +12V   ٨Equivalent circuit PIN NO. Pin name IN OUT Referance Voltage Equivalent Circuit 200K 1 ASW1 ٤ 7 㧙 ASW4 Threshold 1.0㨪2.0V 30K Function SW control signal input terminal At Input open, input becomes “H” due to the pull up resistance. Input impedance is 200kȍ SW control signal input terminal 2 ASW2 ٤ 6 ASW3 3 11 13 +5V -5V +12V 4 5 8 9 15 17 21 23 TU_R_IN TU_L_IN DA_R_IN DA_L_IN AUX_R_IN AUX_L_IN L1_R_IN L1_L_IN 㧙 㧙 㧙 Threshold 1.0㨪2.0V 200K 5V -5V 12V Power supply terminal 50 ٤ 㧙 㧙 FS_L1_IN ٤ 12 㧙 FS control signal input terminal 0.85㨪 1.65V It has two threshold voltages. At input open, it becomes “L” input due to the pull down resistance. Input impedance is 200kȍ FS_AUX_IN 3.1㨪 3.9V 14 AUX_R_OUT 16 AUX_L_OUT 20 L1_R_OUT 22 L1_L_OUT 50 㧙 ٤ Audio signal input terminal The audio signal input terminal is connected to the analog switch inside. Threshold 10 At input open, input becomes “L” due to the pull down resistance. Input Impedance is 200kȍ. 㧙 Audio signal output terminal A chosen audio signal can be outputted using the input transfer switch. FS output terminal 12V H:11.0V 18 FS_AUX_OUT 24 FS_L1_OUT 㧙 ٤ FS output circuit has 3 6.7V output states H, M & L. M:5.75V Load resistance above 10kȍ is used. Output becomes HiZ at “L” selection. L:0V 19 GND 㧙 㧙 0V GND terminal 4/8 ٨Description of operations Ԙ SW1, SW2 2 Audio input is controlled by I C-BUS of BH7624KS2. ԙ FS_L1_OUT, FS_AUX_OUT The 3 states signal (HI, MID, LOW) of the 5V standard is input into FS_L1_IN (10pin), FS_AUX_IN (12pin). Then FS_L1_OUT (24pin), FS_AUX_OUT (18pin) output standard signal of the 12V. This output becomes a Function Switch of the scart connector. ٨SW Control truth table SW1 ASW1 ASW2 AUX_L_OUT AUX_R_OUT L L TU_L_IN TU_R_IN L H DA_L_IN DA_R_IN H L L1_L_IN L1_R_IN H H MUTE MUTE ASW3 ASW4 L1_L_OUT L1_R_OUT L L DA_L_IN DA_R_IN L H AUX_L_IN AUX_R_IN H L MUTE MUTE H H MUTE MUTE SW2 At power Activation ASW1 : H ASW2 : L ASW3 : L ASW4 : H 5/8 ٨Application circuit FS_L1_OUT ASW1 1 24 FS_L1 OUT +5V H ASW2 6.7V L1_L_IN M 2 FS_L1_OUT 10k 12V 23 L L1_L_IN ASW1 BH7624KS2 23 21 L1_L_OUT +5V ASW2 +5V 0.1u ASW3 3 47u 22 L1_L_OUT 47k 17 TU_R_IN ASW4 15 L1_R_IN 4 TU_R_IN 21 L1_R_IN FSL1 5 L1_R_OUT TU_L_IN FSAUX 3 5 TU_L_IN 20 L1_R_OUT 47k FS_AUX OUT 12V ASW3 GND H 6 19 6.7V M GND L ASW4 FS_AUX_OUT 7 18 FS_AUX_OUT 10k DA_R_IN AUX_L_IN 8 DA_R_IN 17 DA_L_IN AUX_L_OUT 16 9 DA_L_IN AUX_L_IN AUX_L_OUT 47k FS_L1_IN AUX_R_IN 10 15 -5V -5V 0.1u 47u AUX_R_IN AUX_R_OUT 11 14 AUX_R_OUT 47k FS_AUX_IN +12V 12 13 0.1u +12V 47u Fig.2 2 ASW1, 2, 3, 4, FS_L1_IN, FS_AUX_IN are controlled by I C-BUS of BH7624KS2. 4.5 12 10 4.4 10 0 4.2 4.1 4 8 -50 0 50 6 4 2 0 㪄㪌㪇 5.0V 㪄㪈㪇㪇 -50 㪄㪈㪌㪇 1.00E+ 1.00E+ 1.00E+ 1.00E+ 1.00E+ 1.00E+ 1.00E+ 02 03 04 05 06 07 08 100 FREQUENCY[Hz] Fig5. Frequency characteristics (Supply voltage dependence) 0.1 0.1 㪌㪇 㪇 -20 PHASE -50C 㪄㪌㪇 25C 㪛㪠㪪㪫㪦㪩㪫㪠㪦㪥㩷㪑㩷㪝 㪛㪠㪪㪲㩼㪴 25C 100C 㪛㪠㪪㪫㪦㪩㪫㪠㪦㪥㩷㪑㩷㪝 㪛㪠㪪㪲㩼㪴 㪈㪇㪇 GAIN PHASE [deg] GAIN [dB] 5.6V Fig4. Circuit Current2 -50C -30 50 TEMPERATURE [㷄] Fig3. Circuit Current1 -10 㪇 -40 TEMPERATURE [㷄] 0 PHASE -20 -30 -50 㪈㪌㪇 㪌㪇 5.0V 4.4V 4.4V 100 10 㪈㪇㪇 -10 0 3.9 GAIN 0.01 100C 㪣 0.01 㪩 㪄㪈㪇㪇 -40 -50 㪄㪈㪌㪇 1.00E+ 1.00E+ 1.00E+ 1.00E+ 1.00E+ 1.00E+ 1.00E+ 02 03 04 05 06 07 08 0.001 4.4 4.6 4.8 5 5.2 5.4 5.6 㪪㪬㪧㪧㪣㪰㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㪭㪚㪚㪈㩷㪲㪭㪴 FREQUENCY[Hz] Fig6. Frequency characteristic (Temperature dependence) Fig7. Distortion (Supply voltage dependence) 6/8 0.001 -50 0 50 100 㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㪲㷄㪴 Fig8. Distortion (Temperature dependence) PHASE [deg] 4.3 㪈㪌㪇 5.6V GAIN [dB] CIRCUIT CURRENT:ICC2[mA] CIRCUIT CURRENT : ICC1[mA] ٨Reference data 98 96 94 92 250 㪩㪦㪥㩷㪑㩷㪩 㪦㪥㪲㱅㪴 98 㪪㪆㪥㩷㪑㩷㪝㪪㪥㪲㩼㪴 100 㪪㪆㪥㩷㪑㩷㪝㪪㪥㪲㩼㪴 100 96 94 150 92 90 90 4.4 4.6 4.8 5 5.2 5.4 5.6 100 -50 0 㪪㪬㪧㪧㪣㪰㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㪭㪚㪚㪈㩷㪲㪭㪴 50 100 -50 㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㪲㷄㪴 -90 -95 -100 -85 -90 -95 0 50 㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴 Fig12. MUTE Attenuation 100 -85 -90 -95 -100 -100 -50 100 Fig11. ON Resistance 㪚㪟㪘㪥㪥㪜㪣㩷㪚㪩㪦㪪㪪㪫㪘㪣㪢㪑㪝 㪚㪟㪚㪩㪪㪈㪃㪝㪚㪟㪚㪩㪪㪉㪲㪻㪙㪴 㪘㪪㪮㩷㪚㪩㪦㪪㪪㪫㪘㪣㪢㩷㪑㩷㪝 㪪㪮㪚㪩㪪㪈 㪃㪝㪪㪮㪚㪩㪪㪉㪲㪻㪙㪴 -85 50 -80 -80 -80 0 㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴 Fig10. S/N ratio (Temperature dependence) Fig9. S/N ratio (Supply voltage Dependence) 㪘㪪㪮㩷㪚㪩㪦㪪㪪㪫㪘㪣㪢㩷㪑㩷㪝㪪㪮㪚㪩㪪㪈㪃㪝㪪㪮㪚㪩㪪㪉㪲㪻㪙㪴 200 -50 0 50 㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴 Fig13. ASW Crosstalk 100 -50 0 50 100 㪫㪜㪤㪧㪜㪩㪘㪫㪬㪩㪜㩷㪲㷄㪴 Fig14. Channel Crosstalk ٨Cautions on use 1. Numbers and data in entries are representative design values and are not guaranteed values of the items. 2. 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. 3. 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. 4. -5V pin potential Ensure a minimum -5V pin potential in all operating conditions. Make sure that no pins are at a voltage below the -5V pin at any time, regardless of whether it is a transient signal or not. 5. Thermal design Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in actual states of use. 6. 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. 7. Operation in strong electromagnetic field Using the ICs in a strong electromagnetic field can cause operation malfunction. 8. Supply voltage Although basic circuit function is guaranteed under normal voltage operation (5V: ±4.5㨪5.5V, 12V: 11.5㨪12.5V), ensure each parameter complies with appropriate electrical characteristics, when using this device. 9. The application circuitry example SW and FS output are controlled by BD3825FS which in turn is controlled by BH7624KS2 and therefore, BD3825FS and BH7624KS2 should be used in conjunction. Pins 18 and 24 should be pulled down by 10kȍ resistor. Pins 1, 2, 6, 7, 10, 12 must be controlled by the microcontroller when using BD3825FS on its own. 7/8 Ͷ Selection of order type B D 3 2 8 S F 5 E TYPE 2 Package, Foaming specification BD3825FS SSOP-A24