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DUAL ELECTRONIC VOLUME CONTROL

S5A2250A01

DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
INTRODUCTION
The S5A2250A01 is a CMOS designed for the electronization of dual volume. It is suitable for M / C, and car stereos. 16-DIP-300A
FEATURES
ORDERING INFORMATION
Device S5A2250A01-D0B0 Package 16-DlP-300A Operating Temperature -20°C - +70°C
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
BLOCK DIAGRAM
L-CH R-CH
10dB STEP UP / DOWN 10dB STEP UP / DOWN
L-OUT1
6 & 7 BITS BIDIRECTIONAL SHIFT REGISTOR CONTROL
2dB STEP UP / DOWN 2dB STEP UP / DOWN
R-OUT1
L-IN1
14 R-IN1 13 A-GND 12 R-IN2 11 R-OUT2 10 U / D 9
A-GND
L-IN2
L-OUT2
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
PIN CONFIGURATION
VSS L-OUT1 L-IN1 A-GND L-IN2 L-OUT2 INH DCO
VDD R-OUT1 R-IN1 A-GND R-IN2 R-OUT2 U / D OSC
S5A2250A01
PIN DESCRIPTION
Pin No. 1 2, 15 3, 14 4, 13 5, 12 6, 11 16 7 8 9 10 Symbol VSS L-OUT1 R-OUT1 L-IN1 R-IN2 A-GND L-IN2 R-IN2 L-OUT2 R-OUT2 VDD INH DCO OSC U / D (-) power supply (GND) 10dB / step atttenuator output. A signal applied to IN is attenuated in 7 steps from 0dB to 60dB at 10dB 10dB / step attenuator inputs Analog ground 2dB / step attenuator inputs 2dB / step attenuator output. A signal applied to IN is attenuated in 5 steps from 0dB to 60dB at 2dB (+) power supply (VDD) When at "H" level, normal operation DC current output for displaying attenuation R, C connecting pin for the oscillator Attenuation up / down control input Descriptions
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
Characteristic Supply Voltage Power Dissipation Operating Temperature Storage Temperature Input Voltage Symbol VDD PD TOPR TSTG VI Value 13 150 - 20 - + 75 - 55 - + 125 VDD + 0.3 - VSS - 0.3 Unit V mW °C °C V
ELECTRICAL CHARACTERISTICS
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
APPLICATION INFORMATION
Setting of Attenuation Attenuation is automatically set at the -40dB position when power is applied.
POWER SUPPLY UP / DOWN
VOLUME LEVEL -40dB -38 -36 -34
-42dB
As soon as the UP key is pressed after power on, the U / P pin is placed in the up state at "H" level, and the oscillator is actuated. When the DOWN key is pressed, the U / P pin is kept at "L" level as long as the DOWN key is pressed, and the oscillator is actuated in the down State, decreasing the attenuation. Oscillation frequency is decided by Cx & Rx. 1 0.7Cx Rx (Hz) (Rs 3Rx)
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
Rs (100K)
Cx (4.7µF)
Rx (33K)
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
TEST CIRCUIT
VDD 0.012µF 100k 470k 120k 6 8 7 5 + 4 680 DOWN 1µF 1µF 10µ F 1µF 10µF IDD KA4558 UP IN 2 470k OUT 2 33k 10µ F A B SW3
S5A2250A01
1µF 680
8 KA4558 1 4 470k IN 1 470k OUT 1 1k SW2 51k B A
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
Current value may fluctuate depending upon the IC. When high precision is required use a variable resistor as a load resistor.
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
BACKUP On the S5A2250A01, when power is off (S1 spon) or the INH pin is set at L (- VSS) level, all I / O pin are shut off and current consumption is reduced to the minimum. Backup by means of a capacitor (C1) becomes possible in this condition. Fig 6 shows an example of an application when a backup capacitor is used.
VDD S1 R1
S5A2250A01
VSS VSS
INH R3 51K
NOTE: If VDD-VSS become below 4.0V, the backup is impossible.
Initialization When Power On The S5A2250A01 has a built-in auto-initializing function for initialization when power is on. As the initializing system is adopted through detection of supply voltage level, if rise of power supply is too fast, the initialization may not be fully effected (no external initialization is necessary) In addition for effective initialization, it is necessary that the INH pin is raised simultaneously with the supply voltage. Further, the initializing level is -40dB. It is recommended to raise the supply voltage and the INH pin as illustrated Fig.
NOTE: If the voltage between VDD and VSS is below 4.0V, the auto-initializing function is actuated.
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
POWER SUPPLY The S5A2250A01 is able to carry art single power supply operation as well as split power supply operation. Split Power Supply
S5A2250A01
DCO UP
DOWN +VDD 0V
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
Single Power Supply
S5A2250A01
DOWN UP DCO
+VDD 0V
S5A2250A01
R248 R
R255 L G R252 R253 R259 R258 R214 100k C215 1µF / 50V R218 1k R257 2.2k L R260 IC201 R236 10k R262 R263 2.2k 6.8k 2.2k R261 6.8k G R C247 2.2µF / 50V R256 8.2k R209 47k R216 4.7k 2.2k 8.2k 680 L 22k R R235 3.3k C214 1µF / 50V R217 1k C246 2.2µF / 50V FROM TAPE R234 1k R213 100k C216 1µF / 50V R215 4.7k 22k
APPLICATION CIRCUIT
C213 1µF / 50V C238 10µF / 16V
R232 1k
C237 10µF / 16V
REC OUT
R269 10k
R212 100k
KA4558S OP AMP
IC203
R202 100
S1A0065A 0 1
C207 1µF / 50V C202 1µF / 50V
REC B+
C200 100µF / 16V
R200 100k
R201 100k
C226 C221 C222 R265 4.7k
R203 100k 47µF / 16V 47µF / 16V C208 1µF / 50V C220 C225 100µF / 25V 220µF / 10V Q202 R1009 R228 120 R229 120 R230 R226 2.2 22 R227 C227 1000µF / 10V 1000pF R208 10k C232 C231 C233 1000µF / 10V C209 1µF / 50V R221 15k C219 100µF / 25V C230 4.7µF / 50V
100µF / 25V
R204 100k
C201 1µF / 50V
C210 3.3µF / 50V
S5A2250A01
R225 10k C229 4.7µF / 50V C230 1000pF 1N4148
R222 100
C211 2.2µF / 50V
IC202
2.2 0.15µF
Q208 C945
Q210 A928 C235 1000µF / 16V R267 22k R266 1.5k 1 / 2W R268 2.2k Q201 R1009
SYNCR CD PWC VR-UP VR-DN
Q209 C1008
C206 2.2µF / 50V R224 15k R207 10k C212 100µF / 10V R264 100 Q207 C945 Q204 C945 Q203 C945 R231 4.7k C218 4.7µF / 50V D202
1µF / 50V 1µF / 50V
C203 1µF / 50V
D201 1N4148
POWER
Q200 7809 RQ200 7805
MICOM B+
C236 1µF / 50V R220 1 1W R246 1 2 1W DC IN 12V 1.5A C241 Q205 A928 C234 D204 D203 C245 1µF / 50V
MUTE P-SENS MICOM B+ GND
R206 22k
C205 100µF / 10V
R205 22k
R238 2.2k
R242 3.9k
R241 3.9k Q206 C1008 R240 1.5k D208 5.6V / 1W
2200µF / 25V
VR-UP
VR-DN
POWER
P-SENS
C243 0.47µF / 50V
R245 2.2k
C244 10µF / 25V R243 4.7k 6.8k D207 1N4001
DUAL ELECTRONIC VOLUME CONTROL
C239 0.047µF X 5
1N5404X5
TRANS FORMER
AC IN 220V 50Hz
22k C240 C242 C238 R239
R237 2.2k
SPEAKER OUTPUT
R233 3.3k R254 680
TUNER
IC200 L G
OPTION
R251 R250 6.8k 2.2k
KA4558S OP AMP