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| BA8272AFV Audio ICs BUS Interface for car audio BA8272AFV BA8272AFV is a BUS interface IC (slave side) developed for car audio systems. Communication system of BUS ON, DATA, CLOCK, and RESET can be constructed in combination with BA8270F / BA8270FV (master side). This IC can be used for communication between the audio system and other applications such as power amplifier, CD, MD changer, navigation and TV. !Applications Car audio !Features 1) It can be used for 3V Interface system. 2) It can build up the communication system of BUS ON, DATA, CLOCK and RESET in combination with BA8270FV (IC at a master side) in pairs. 3) Suitable for car audio. !Absolute maximum ratings (Ta=25C) Parameter Supply voltage Power dissipation Operating temperature range Storage temperature range Range of voltage applied to an inter terminal Symbol VCC Pd Topr Tstg - Limits 7.0 400 -40~+85 -55~+125 -0.3~+7.0 Unit V mW C C V Reduced by 4mW for each increase in Ta of 1C over 25C. (Board size 50x50x1.6mm) The operating temperature range shall be within IL=50mA. !Recommended operating conditions (Ta=25C) Parameter Supply voltage Symbol VCC Min. 2.8 Typ. - Max. 7.0 Unit V 1/8 BA8272AFV Audio ICs !Block diagram LINK OFF BUS ON CLK OUT DATA IN DATA OUT RESET 12 VCC 14 13 11 9 10 8 R3 47k R14 22k R32 27k R16 4.7k R21 4.7k Q42 R2 47k R10 47k R5 3.9k R26 12.3k R9 26k R1 26k R22 1k R24 19.7k R23 47k 3 GND 1 2 4 BUS CLK 5 VREF 6 BUS DATA 7 BUS RESET BUS ON OUT BUS ON IN 2/8 BA8272AFV Audio ICs !Electrical characteristics _ (unless otherwise noted, Ta=25C, Vcc=5.5V) Parameter Circuit current 1 Circuit current 2 Circuit current 3 VCC-BUS ON OUT voltage 1 VCC-BUS ON OUT voltage 2 Input terminal current 1 Input terminal current 2 Input terminal current 3 Input terminal current 4 Input terminal current 5 Input terminal current 6 Output internal resistor 1 Output internal resistor 2 Output saturation voltage 1 Output saturation voltage 2 Reset output voltage CLK OUT output "H" level Symbol ICC1 ICC2 ICC3 VLOSS1 VLOSS2 IIN1 IIN2 IIN3 IIN4 IIN5 IIN6 R3 R21 VSAT1 VSAT2 VBON VHBA Min. - - - - - 75 75 10 10 330 3.5 35.2 3.52 - - - VHI -0.3 0.75 Typ. - 1.1 5.0 0.15 0.09 100 100 25 25 395 4.8 47 4.7 0.2 0.1 0.2 VHI -0.5 0.80 Max. 10 3.0 13.0 0.35 0.2 140 140 40 40 500 6.4 58.8 5.88 0.4 0.25 0.4 VHI -0.7 0.85 Unit A mA mA V V A A A A A mA k k V V V V Conditions Upon no load, all the terminals turn OFF. Upon no load LINK OFF=5.5V IL=50mA IL=100mA IL=40mA BUS ON input terminal 5.5V input LINK OFF terminal 5.5V input BUS CLK terminal 5.5V input BUS DATA terminal 5.5V input DATA IN terminal 5.5V input BUS RESET terminal 5.5V input BUS ON terminal DATA OUT terminal BUS ON, CLK OUT, DATA OUT BUS DATA pull up resistance 1k I8=1mA, BUS RESET terminal 5.5V 0V inputted into the BUS CLOCK terminal. "H" level of the BUS ON OUT terminal shall be VH1. VHBA=VH1-VH3 CLK OUT terminal observation BUS CLK input threshold level VTH V BUS CLK input hysteresis width VHYS 300 400 500 mV CLK OUT terminal observation This product is not designed for protection against radio active rays. 3/8 BA8272AFV Audio ICs !Measurement circuit IIN2 R3 IIN5 + E9 1 2 S8 5.5V 1 S7 V13 + 1mA I8 E12 1 2 S9 A + 5.5V A 1 ICC 2 S10 2 + A V 13 12 LINK OFF V11 V 11 + + V 10 V10 + V 14 VCC V8 on 9 DATA IN 8 RESET BUS ON CLK OUT DATA OUT 1 2 S1 VCC 5.5V + V VLOSS R21 2 V VHB BUS ON OUT + BUS ON IN GND BUS CLK VREF BUS DATA BUS RESET 1 2 3 4 5 6 7 1 S11 + V S2 2 1 IL E2 S3 1 2 S4 1 IIN1 + 5.5V 5.5V S6 V6 1k + S5 2 1 2 1 V 2 A A + IIN6 A A 0V IIN3 + E4 2 1 S12 IIN4 + 5.5V E6 5.5V E7 Fig.1 4/8 BA8272AFV Audio ICs SW operation table of measurement circuit diagram Parameter Circuit current 1 Circuit current 2 Circuit current 3 VCC-BUS ON OUT voltage 1 VCC-BUS ON OUT voltage 2 Input terminal current 1 Input terminal current 2 Input terminal current 3 Input terminal current 4 Input terminal current 5 Input terminal current 6 Output internal resistor 1 Output internal resistor 2 Output saturation voltage 1 Output saturation voltage 1 Output saturation voltage 1 Output saturation voltage 2 Reset output voltage CLK OUT output "H" level BUS CLK input threshold level Symbol ICC1 ICC2 ICC3 VLOSS1 VLOSS2 IIN1 IIN2 IIN3 IIN4 IIN5 IIN6 R3 R21 VSAT1 VSAT1 VSAT1 VSAT2 VBON VHBA VTH S 1 2 2 2 2 2 2 2 2 2 2 2 1 1 2 2 2 2 2 2 2 S 2 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 S 3 1 1 1 1 1 2 1 1 1 1 1 1 1 2 1 1 1 1 1 1 S 4 1 1 1 1 1 1 1 2 1 1 1 1 1 1 2 1 1 1 2 2 S 5 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 2 2 S 6 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 2 1 1 S 7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 S 8 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 S 9 1 2 2 2 2 1 2 1 1 1 1 1 1 1 2 2 1 2 2 2 S 10 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 S 11 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 S 12 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 Mesurement terminal Pin14 Pin14 Pin14 Pin1-Pin14 Pin1-Pin14 Pin2 Pin12 Pin4 Pin6 Pin9 Pin7 Pin13-Pin14 Pin1-Pin10 Pin13 Pin11 Pin10 Pin6 Pin8 Pin1-Pin11 Pin4 E2=5.5V, BUS ON terminal E4=5.5V, CLK OUT terminal, E12=5.5V E6=5.5V, DATA OUT terminal, E12=5.5V E9=5.5V, BUS DATA terminal E7=5.5V, RESET terminal E4=0V, E12=5.5V E4=0~3V, sweep, E12=5.5V E12=5.5V E12=5.5V, IL=50mA E12=5.5V, IL=100mA E12=5.5V, IL=40mA E2=5.5V E12=5.5V E4=5.5V E6=5.5V E9=5.5V E7=5.5V Conditions BUS CLK input hysteresis width VHYS 2 1 1 2 2 1 1 1 2 1 1 1 Pin4 E4=0~3V, sweep, E12=5.5V !Application example To master unit 8 RESET BUS RESET To next slave unit E RESET E RESET 7 9 DATA IN BUS DATA 6 B BUS. DATA B BUS.DATA Schottky 10 DATA OUT VREF 5 11 CLK OUT BUS CLK 4 C BUS. CLK C BUS. CLK 12 LINK OFF GND 3 A GND A GND 13 BUS ON BUS ON IN 2 F BUS ON F BUS ON 14 VCC BUS ON OUT 1 Slave micon LINK OFF * Establish a protection circuit woth Schottky diode to prevent an error in operation due to noise of GND potential or less of BUS ON and BUS CLK. * Establish a protection circuit with Zener diode to prevent over-voltage. Fig.2 5/8 BA8272AFV Audio ICs !Operation notes 1. About operation voltage supply range Within operation voltage supply range, basic circuit function operation is guaranteed within operation ambient temp. But please confirm set up of constant and element, voltage set up and temp set up on use. 2. About operation temp range If it within recommended operation voltage range, circuit function operation is guaranteed within operation temp. It corralled to conditions of power dissipation to temp. Please watch out except condition stipulated by electrical characteristics within the range, it cannot guarantee standard value of electrical characteristics. But it retains original function. 3. About application circuit Example of application circuit drawing is convinced as recommendable, but please confirm characteristic including above mentioned noticed. At use with modification of external constant, please decide with enough margin considering distribution, ETC of this IC, external parts including quiescence characteristics and excessive characteristics. Please note that we have not yet confirmed any concerned patent rights completely. 4. In this model, the resistance R24 and R26 shown into Block diagram were changed from previous model (BA8272FV) as follows. BA8272FV : R24=10k, R26=22k BA8272AFV : R24=19.7k, R26=12.3k 5. Electrostatic destruction withstanding voltage of Pin4, Pin5 and Pin12 must be 200V or less according to EIAJ stand (C=200pF, R=0). Take above into consideration when in use. 6/8 BA8272AFV Audio ICs 6. When supply voltage is changed then the threshold voltage is also changed. Please refer to the standard value (reference) of threshold voltage of each input terminal as shown below. Make sure to confirm the characteristics adequately and leave an adequate margin for noise. Unless specified particularly, switches of MEASUREMENT CIRCUIT DIAGRAM shown Fig.1 are switched the side of 1. The threshold voltage is value at room temperature. Measurement conditions Supplu voltage [v] 2.8 3.3 5.5 7.0 2.8 3.3 5.5 7.0 2.8 3.3 5.5 7.0 S1=2, S5=2, S9=2, E12=VCC Value of E6 when the output voltage of Pin10 becomes 0.1 VCC. S1=2, S9=2, S4=2, E12=VCC Value of E4 when the output voltage of Pin11 becomes 0.1 VCC. S1=2, S3=2, S9=2, E12=VCC Value of E2 when the output voltage of Pin13 becomes 0.1 VCC. SW operation and circuit conditions Definition of the threshold voltage Input terminal Standard value of threshold voltage (reference) [V] 1.9 Pin2 1.9 2.0 2.1 0.5 Pin4 0.7 1.2 1.6 0.5 Pin6 0.7 1.2 1.6 Pin7 0.8 - S1=2, S6=2, S8=2, I8=1mA Value of E7 when the output voltage of Pin8 becomes 0.1 VCC. 1.3 Pin9 1.4 1.6 1.8 2.8 3.3 5.5 7.0 S1=2, S8=2, S9=2, S12=2, E12=VCC Value of E9 when the output voltage of Pin6 becomes 0.1 VCC. Pin12 1.8 - S1=2, S9=2 Value of E12 when the output voltage of Pin1 becomes 0.9 VCC. 7/8 BA8272AFV Audio ICs !External dimensions (Units : mm) 5.00.2 14 8 6.40.3 4.40.2 1 7 1.150.1 0.1 0.150.1 0.65 0.1 0.220.1 SSOP-B14 0.3Min. 8/8 |
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