Document
SC7315
2-CH OUTPUT STEREO AUDIO PROCESSOR
DESCRIPTION
The SC7315 is a volume, tone (bass and treble), balance (left/ right) and fader 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 I 2C 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.
DIP-20-300-2.54
FEATURES
* 2 stereo inputs * Two speaker attenuators: --2 independent speakers control in 1.25dB steps for balance and fader facilities --Independent mute function * All functions programmable via serial I 2C Bus * Loudness function * Volume control in 1.25dB steps * Treble and bass control * Input and output for external equalizer ornoise reduction system Device SC7315 SC7315S
SOP-20-375-1.27
ORDERING INFORMATION
Package DIP-20-300-2.54 SOP-20-375-1.27
BLOCK DIAGRAM
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2004.08.03 Page 1 of 13
SC7315
ABSOLUTE MAXIMUM RATING
Characteristics Supply Voltage 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 -78.75 -14 -38.75 0 100 Min. 6 2 0.01 106 103 0 +14 0 11.25 0.1 Typ. 9 Max. 10 Unit V Vrms % dB dB dB dB dB dB dB
ELECTRICAL CHARACTERISTICS (Refer to the test circuit)
(Tamb=25°C,VS=9.0V,RL=10kΩ Characteristics SUPPLY VOLTAGE
www.DataSheet4U.com
RG=600Ω Symbol
all controls flat(G=0), f=1kHz,Unless otherwise specified) Test conditions Min. Typ. Max. Unit
Operating Supply Voltage Operating Supply Current Ripple Rejection of Supply Voltage VOLUME CONTROL Input Resistance Control Range Minimum Attenuation Maximum Attenuation Step Resolution Attenuation Set Error Tracking Error DC Steps SPEAKER ATTENUATORS Control Range
VS IS SVR
6
9 20.0
10.0 35.0
V mA dB kΩ dB dB dB dB dB dB mV mV
60
80
RIV Crange AV(min)
AV(max) ASTEP
20 70 -1 70 0.5 AV=0 to – 20dB AV=-20 to –60dB -1.25 -3
33 75 0 75 1.25 0
50 80 1 80 1.75 1.25 2 2
EA ET VDC
Adjacent attenuation steps From 0dB to AV max
0 0.5
3 7.5
Crange
35
37.5
40
dB
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2004.08.03 Page 2 of 13
SC7315
(Continued)
Characteristics 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 Step Resolution AUDIO OUTPUTS Clipping Level Output Load Resistance Output Load Capacitance Output Resistance DC Voltage Level GENERAL
Symbol SSTEP EA AMUTE VDC
Test conditions
Min. 0.5
Typ. 1.25
Max. 1.75 1.5
Unit dB dB dB
80 Adjacent attenuation steps From 0dB to MUTE ±12 1 34 ±13 1
100 0 1 ±14 2 44 ±14 2 3 10 ±16 3 58 ±15 3
mV mV
GB BSTEP RB
Maximum boost/cut
dB dB kΩ dB dB
Gt TSTEP
Maximum boost/cut
VOCL RL CL ROUT VOUT
THD=0.3%
2 4
2.5
Vrms kΩ 10 nF Ω V µV 15 µV µV dB 0.1 0.3 % % % dB 1 2 dB dB
30 4.2
75 4.5
120 4.8
BW=20 ~20kHz,flat output muted Output Noise eNO BW=20 ~20kHz,flat All gains=0dB A curve, all gains =0 dB Signal to Noise Ratio
www.DataSheet4U.com
2.5 5 3 106 0.01 0.09 0.04 80 103 0 0
S/N d
All gains=0dB; Vo=1Vrms Av=0,VIN=10mV
Distortion
Av=-20dB, VIN=1Vrms Av=-20dB,VIN=0.3Vrms
Channel Separation Left/Right Total Tracking Error BUS INPUTS Input Low Voltage Input High Voltage Input Current Output Voltage SDA Acknowledge NOTES:
Sc AV=0 to – 20 dB AV=-20 to –60 dB
VIL VIH IIN Vo Io=1.6mA 3 -5
1
V V µA V
+5 0.4
(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 input is grounded through the 2.2µF capacitor.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2004.08.03 Page 3 of 13
SC7315
PIN CONFIGURATIONS
CREF VDD GND L TREBLE R IN(R) LOUD R NC LOUD L 5 6 7 8 9 16 OUT R 15 BOUT(R) 14 BIN(R) BASS 13 BOUT(L) 12 BIN(L) 11 IN(L) 1 2 3 4 20 SCL 19 SDA 18 DGND 17 OUT L BUS INPUTS
NC 10
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2004.08.03 Page 4 of 13
SC7315
TYPICAL CHARACTERISTICS PERFORMANCE
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2004.08.03 Page 5 of 13
SC7315
TYPICAL CHARACTERISTICS PERFORMANCE (continued)
Fig.11 Supply Voltage Rejection vs. Frequency
.