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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
* * * * Wide supply voltage range: VDD = 6V - 12V (Backup is possible up to 4V) Attenuation can be controlled from 0dB to -66dB by 2dB/step. Controlling attenuation by means of the built in osc and the up/down terminals. Single power supply operation as well as split power supply operation.
ORDERING INFORMATION
Device S5A2250A01-D0B0 Package 16-DlP-300A Operating Temperature -20C - +70C
1
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
BLOCK DIAGRAM
VSS
1
L-CH R-CH
16 15
10dB STEP UP/DOWN 10dB STEP UP/DOWN
VDD
L-OUT1
2 3 4 5 6 7 8
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
OSC
A-GND
L-IN2
L-OUT2
INH
DCO
2
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
PIN CONFIGURATION
VSS L-OUT1 L-IN1 A-GND L-IN2 L-OUT2 INH DCO
1 2 3 4
16 15 14 13
VDD R-OUT1 R-IN1 A-GND R-IN2 R-OUT2 U/D OSC
S5A2250A01
5 6 7 8
12 11 10 9
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
3
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
ABSOLUTE MAXIMUM RATINGS (Ta = 25C)
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
(VDD = 12V, f = 1kHz, Ta = 25C, unless otherwise specified) Characteristic Circuit Current Symbol IDD1 IDD2 RATT1 Attenuator Resistor RATT2 Backup Current Input High Voltage Input Low Voltage Total Harmonic Distortion Attenuator Error Max Input Amplitude DCO Output current Cross Talk Operating Frequency lBACKUP VIH VIL THD VATT(ERR) VI(MAX) IO(DCO) CT fOSC1 fOSC2 Test Conditions VDD = 13V VDD = 6V pin 3 - pin 4 pin 14 - pin 13 pin 5 - pin 4 pin 12 - pin 13 VDD = 4V, s/w1 = b -up (down) s/w on s/w1 = a VI = 1.0 Vpp, ATT = 10dB, f = 15kHz VO = 5 step THD = 1%, VOL = max 1 step ATT = - 10dB UP/SW ON, S/W 3 = a S/W 3 = d Min. 0.1 0.1 25 10 - 9.6 - -2 1.0 70 55 5 9 Typ. 1.0 0.8 50 20 - 11.8 0.5 0.005 0 2.5 100 65 13 11 Max. 2.5 2.0 70 k 30 10 12.3 1.2 0.01 2 4.0 140 - 20 13 A V % dB Vrms A dB Hz kHz Unit mA
4
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
OSC
VOLUME LEVEL -40dB -38 -36 -34
-32
-30
-28
-30
-32
-34
-36
-38
-40
-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)
fOSC =
5
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
16
+
Rs (100K)
Cx (4.7F)
9
Rx (33K)
10
+
Up
Down
6
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
TEST CIRCUIT
VDD 0.012F 100k 470k 120k 6 8 7 5+ 4 680 DOWN 1F 1F 10 F 1F 10F IDD KA4558 UP IN 2 470k OUT 2 33k 10 F A B SW3
A 16 15 14 13 12 11 10 9
S5A2250A01
1 2 3 4 5 6 7 8
1F 680
1F
10 F
1F SW1 A B
3 2
8 KA4558 1 4 470k IN 1 470k OUT 1 1k SW2 51k B A
120k
7
S5A2250A01
DUAL ELECTRONIC VOLUME CONTROL
Attenuation Display Output The S5A2250A01 is provided with the DC current output pin for displaying attenuation. Steps of attenuation from 0 dB - - are shown in the table below. The current of each step is increased or decreased approximately 100/uA. STEP 0 1 2 3 4 5 6 7 8 9 10 11 12 13 DCO 0 I = 100 uA + 30 uA 2*1 3*1 4*1 5*1 6*1 7*1 8*1 9*1 10*1 11*1 12*1 13*1 ATTENUATION - 64dB - - - 60dB - - 62dB - 54dB - - 58dB - 50dB - - 52dB - 44dB - - 48dB - 40dB - - 42dB - 34dB - - 38dB - 30dB - - 32dB - 24dB - - 28dB - 20dB - - 22dB - 14dB - - 18dB - 10dB - - 12dB - 4dB - - 8dB - 0dB - -2dB
* Current value may fluctuate depending upon the IC. When high precision is required use a variable resistor as a load resistor.
8
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
16
VDD
15
14
13
12
10
10
9
10K
R2
S5A2250A01
+
C1
1 2 3 4 5 6 7 8
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.
* VDD-VSS = 4V VDD-VSS or INH pin voltage T T > 1ms
NOTE: If the voltage between VDD and VSS is below 4.0V, the auto-initializing function is actuated.
9
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
16
10
9
4
S5A2250A01
+
1
7
8
DCO UP
DOWN +VDD 0V
VDD
-VSS
10
DUAL ELECTRONIC VOLUME CONTROL
S5A2250A01
Single Power Supply
16
10
9
4
S5A2250A01
+
1
+
7
8
DOWN UP DCO
+VDD 0V
VDD
-VSS
11
S5A2250A01
R248 R
2.2k
1
R255 L G R252 R253 R259 R258 R214 100k C215 1F/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 2.2F/50V R256 8.2k R209 47k R216 4.7k 2.2k 8.2k 680 L 22k R R235 3.3k C214 1F/50V R217 1k C246 2.2F/50V FROM TAPE R234 1k R213 100k C216 1F/50V R215 4.7k 22k
2
3
4
5
6
7
8
9
R249
6.8k
APPLICATION CIRCUIT
C213 1F/50V C238 10F/16V
R232 1k
R210
C237 10F/16V
R211
REC OUT
R269 10k
100k
R
R212 100k
KA4558S OP AMP
4
IC203
R202 100
1
2
3
5
6
7
8
9
S1A0065A 0 1
C207 1F/50V C202 1F/50V
REC B+
C200 100F/16V
R200 100k
R201 100k
1
C226 C221 C222 R265 4.7k
2
3
4
5
6
7
8
9
10
11
12
L G R
R203 100k 47F/16V 47F/16V C208 1F/50V C220 C225 100F/25V 220F/10V Q202 R1009 R228 120 R229 120 R230 R226 2.2 22 R227 C227 1000F/10V 1000pF R208 10k C232 C231 C233 1000F/10V C209 1F/50V R221 15k C219 100F/25V C230 4.7F/50V
100F/25V
R204 100k
C201 1F/50V
R223
33k
C210 3.3F/50V
S5A2250A01
R225 10k C229 4.7F/50V C230 1000pF 1N4148
R222 100
C211 2.2F/50V
IC202
C224
16
15
14
13
12
11
10
9
2.2 0.15F
Q208 C945
G CD B+
Q210 A928 C235 1000F/16V R267 22k R266 1.5k 1/2W R268 2.2k Q201 R1009
SYNCR CD PWC VR-UP VR-DN
Q209 C1008
1
C206 2.2F/50V R224 15k R207 10k C212 100F/10V R264 100 Q207 C945 Q204 C945 Q203 C945 R231 4.7k C218 4.7F/50V D202
2
3
4
5
6
7
8
1F/50V 1F/50V
C203 1F/50V
D201 1N4148
C204
POWER
Q200 7809 RQ200 7805
C205
MICOM B+
C236 1F/50V R220 1 1W R246 1 2 1W DC IN 12V 1.5A C241 Q205 A928 C234 D204 D203 C245 1F/50V
MUTE P-SENS MICOM B+ GND
R206 22k
C205 100F/10V
R205 22k
R238 2.2k
R242 3.9k
R241 3.9k Q206 C1008 R240 1.5k D208 5.6V/1W
2200F/25V
VR-UP
VR-DN
MUTE
POWER
D206
GND
R244
P-SENS
C243 0.47F /50V
R245 2.2k
C244 10F /25V R243 4.7k 6.8k D207 1N4001
DUAL ELECTRONIC VOLUME CONTROL
C239 0.047F X 5
1N5404X5
D205
TRANS FORMER
AC IN 220V 50Hz
22k C240 C242 C238 R239
R237 2.2k
SPEAKER OUTPUT
TAPE
AUX
G
47k
CD
R233 3.3k R254 680
TUNER
12
IC200 L G
OPTION
R251 R250 6.8k 2.2k
KA4558S OP AMP

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