SC7312S Datasheet PDF - Silan Microelectronics

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SC7312S
Silan Microelectronics

Part Number SC7312S
Description 4CH OUTPUT STEREO AUDIO PROCESSOR
Page 12 Pages


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SC7312
4-CH OUTPUT STEREO AUDIO PROCESSOR WITH 4 STEREO INPUTS AND
TONE/VOLUME CONTROL
DESCRIPTION
The SC7312 is a volume, tone (bass and treble), balance (left/ right)
and fader(front/rear) processor for quality audio applications in car radio
and Hi-Fi systems. Selectable input gain and external loudness function
are provided. Control is accomplished by serial I2C bus microprocessor
interface. The AC signal settings is obtained by resistor networks and
switches combined with operational amplifiers. Due to the Used CMOS
technology, low distortion, low noise and low DC stepping are obtained.
SOP-32-375-1.27
FEATURES
* Input multiplexer:
--4 stereo inputs
--Selectable input gain for optimal adaptation to different
sources
* Four speaker attenuators:
--4 independent speakers control in 1.25dB steps for
balance and fader facilities
--Independent mute function
* All functions programmable via serial I2C Bus
* Loudness function
* Volume control in 1.25dB steps
ORDERING INFORMATION
Device
SC7312S
Package
SOP-32-375-1.27
* Treble and bass control
* Input and output for external
equalizer or noise reduction system
BLOCK DIAGRAM
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2004.08.03
Page 1 of 13



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SC7312
ABSOLUTE MAXIMUM RATINGS
Characteristics
Supply Voltages
Operating Temperature
Storage Temperature
Symbol
VS
Tamb
Tstg
Ratings
10.2
-40 ~ +85
-55 ~ +150
Unit
V
°C
°C
QUICK REFERENCE DATA
Characteristics
Supply Voltage
Maximum Input Signal Handling
Total Harmonic Distortion ,V=1Vrms,
f=1kHz
Signal to Noise Ratio
Channel Separation, f=1kHz
Volume Control, 1.25dB step
Bass and Treble Control, 2dB step
Fader and Balance Control, 1.25dB
step
Input Gain, 3.75dB Step
Mute Attenuation
Symbol
Vs
VCL
THD
S/N
Sc
Min.
6
2
-78.75
-14
-38.75
0
Typ.
9
0.01
106
103
100
Max.
10
0.1
0
+14
0
11.25
Unit
V
Vrms
%
dB
dB
dB
dB
dB
dB
dB
ELECTRICAL CHARACTERISTICS (Refer to the test circuit)
(Tamb=25°C, VS=9.0V, RL=10k, RG=600, all controls flat(G=0), f=1kHz,Unless otherwise specified)
Characteristics
Symbol
Test conditions
Min. Typ. Max.
www.DataShSeUetP4UP.LcYomVOLTAGE
Operating Supply Voltage
VS
6 9 10.0
Unit
V
Operating Supply Current
IS
20.0 35.0 mA
Ripple Rejection of Supply Voltage
INPUTS SELECTORS
SVR
60 80
dB
Input Resistance
RII Input 1, 2, 3, 4
35 50 70 k
Clipping Level
VCL
2 2.5
Vrms
Input Separation (note 2)
SIN
80 100
dB
Output Load Resistance
RL Pin 8, 21
4 k
Minimum Input Gain
GIN(MIN)
-1 0 1 dB
Maximum Input gain
GIN(MAX)
11.25
dB
Step Resolution
GSTEP
3.75 dB
Input Noise
eIN G=11.25dB
2 µV
DC Steps
Adjacent gain steps
VDC
G=18.75 to MUTE
4 20 mV
4 mV
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2004.08.03
Page 2 of 13



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SC7312
(Continued)
Characteristics
VOLUME CONTROL
Input Resistance
Control Range
Minimum Attenuation
Maximum Attenuation
Step Resolution
Attenuation Set Error
Tracking Error
DC Steps
SPEAKER ATTENUATORS
Control Range
Step Resolution
Attenuation Set Error
Output Mute Attenuation
DC Steps
BASS CONTROL (note 1)
Control Range
Step Resolution
Internal Feedback Resistance
TREBLE CONTROL (note 1)
Control Range
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Step Resolution
AUDIO OUTPUTS
Clipping Level
Output Load Resistance
Output load Capacitance
Output Resistance
DC Voltage Level
GENERAL
Output Noise
Signal to Noise Ratio
Symbol
Test conditions
Min. Typ. Max. Unit
RIV 20 33 50
Crange
70 75 80
AV(min)
-1 0 1
AV(max)
70 75 80
ASTEP
0.5 1.25 1.75
AV=0 to –20dB
EA
AV=-20 to –60dB
-1.25 0 1.25
-3 2
ET 2
Adjacent attenuation steps
VDC
From 0dB to AV max
03
0.5 7.5
k
dB
dB
dB
dB
dB
dB
mV
mV
Crange
SSTEP
EA
AMUTE
VDC
Adjacent attenuation steps
From 0dB to MUTE
35
0.5
80
37.5 40
1.25 1.75
1.5
100
03
1 10
dB
dB
dB
dB
mV
mV
GB
BSTEP
RB
Maximum boost/cut
±12 ±14 ±16 dB
1 2 3 dB
34 44 58 k
Gt Maximum boost/cut
TSTEP
±13 ±14 ±15 dB
1 2 3 dB
VOCL
RL
CL
ROUT
VOUT
THD=0.3%
2 2.5
Vrms
4 k
10 nF
30 75 120
4.2 4.5 4.8 V
BW=20 ~20kHz,flat
output muted
eNO BW=20 ~20kHz,flat
All gains=0dB
A curve, all gains =0 dB
S/N All gains=0dB; Vo=1Vrms
2.5 µV
5 15 µV
3 µV
106 dB
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2004.08.03
Page 3 of 13



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SC7312
(Continued)
Characteristics
Symbol
Test conditions
Min. Typ. Max. Unit
Av=0,VIN=10mV
0.01 0.1 %
Distortion
d Av=-20dB, VIN=1Vrms
0.09 0.3 %
Av=-20dB,VIN=0.3Vrms
0.04 %
Channel Separation Left/right
Sc
80 103
dB
Total Tracking Error
BUS INPUTS
AV=0 to –20 dB
AV=-20 to –60 dB
0 1 dB
0 2 dB
Input Low Voltage
VIL
1V
Input High Voltage
VIH
3V
Input Current
IIN
-5 +5 µA
Output Voltage SDA Acknowledge
Vo IO=1.6mA
0.4 V
NOTES:
(1) Bass and treble response see Figure 16. The center frequency and quality of the response behavior can be
chosen by the external circuitry. A standard first order bass response can realized by a standard feedback
network.
(2) The selected input is grounded through the 2.2µF capacitor.
PIN CONFIGURATIONS
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CREF 1
VDD 2
GND 3
CODE 4
TREBLE
L5
R6
IN(R) 7
OUT(R) 8
LOUD R 9
R4 10
RIGHT
INPUTS
R3 11
R2 12
R1 13
NC 14
LOUD L 15
LEFT INPUTS L4 16
32 SCL
31 SDA
30 DIG GND
BUS
INPUTS
29 OUT LF
28 OUT RF
27 OUT LR
26 OUT RR
25 BOUT(R)
24 BIN(R)
23 BOUT(L)
BASS
22 BIN(L)
21 OUT(L)
20 IN(L)
19 L1
18 L2
LEFT INPUTS
17 L3
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2004.08.03
Page 4 of 13



SC7312S datasheet pdf
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