SC5358 6-CH ELECTRONIC VOLUME CONTROLLER DESCRIPTION SC5358 is a 6-channel electronic volume controller IC mainly designed for the current multi-channel AV systems. It provides an I2C control interface, a selectable address and an attenuation range from 0 to – 79dB at 1dB/step. FEATURES * CMOS technology * I2C bus control interface * Selectable address * Attenuation range: 0~-79dB(1dB/step) * Power supply: 5~9V * S/N>100dB * High Channel Separation APPLICATIONS ORDERING INFORMATION Part No. Package SC5358 DIP-20-300-2.54 SC5358S SOP-20-375-1.27 * 5.1-channel AV system * Computer multi-media system * Other multi-channel systems BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2004.08.03 Page 1 of 9 SC5358 ABSOLUTE MAXIMUM RATINGS Symbol Ratings Unit Supply Voltage Characteristics VCC 12 V Operating Temperature Topr -20~+75 °C Storage Temperature Tstg -40~+125 °C Vi -0.3~VCC+0.3 V Input Voltage ELECTRICAL CHARACTERISTICS(VCC=9V Vi=1Vrms f=1kHz Temperature t=27 ) Max. Unit Operating Voltage Characteristics Symbol VCC - Test conditions Min. 4 Typ. 9 12 V Operating Current ICC VCC=9V Vi=0V - 7.5 9 mA Min. attenuation - 0 - Max. attenuation - 79 - Volume Attenuation Range ARAN Attention step ASTEP - - 1 - dB Attention Step Gain Error GERR - 0.5 - dB - 0.5 - dB 2.0 2.3 2.5 Vrms f=1kHz,volume Vout=2Vrms attenuation - 0.07 0.09 % 0dB,load Vout=200mVrms - 0.003 0.005 % Vin=GND,volume attenuation 0dB. - 2 3 µVrms 110 120 125 dB 100 120 125 dB 90 95 97 dB - 0.25 0.27 MHz Interchannel Attenuation Gain Error CERR - dB VCC=9V,=1kHz,volume Maximum Output Voltage Vomax attenuation 0dB load resistor is 50kΩ,THD<1% Total Harmonic Distortion THD resistor is 50kΩ Noise Output eNO Signal To Noise Ratio SNR Channel Separation Mute Attenuation CS MUTE Vin=1Vrms,volume attenuation 0dB Vin=2.5Vrms,f=1kHz,volume attenuation 0dB Vin=2.5Vrms,f=1kHz,volume attenuation 0dB. Vin=2.5Vrms,volume attenuation Frequency Response FR Input Impedance Rin f=1kHz - 48 - kΩ Output Impedance Rout f=1kHz,Vout=100mVrms - 100 - Ω Max. Unit 0dB THD<3% I2C BUS SECTION ELECTRICAL CHARACTERISTICS Characteristics Symbol Conditions Min. Typ. Bus high input level VIH - 0.5 - - VCC Bus low input level VIL - - - 0.2 VCC HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2004.08.03 Page 2 of 9 SC5358 PIN CONFIGURATION PIN DESCRIPTION Pin No. Pin name Pin description 1 IN1 Input channel 1 2 IN2 Input channel 2 3 IN3 Input channel 3 4 A2 The 3rd bit of address 5 DGND 6 SCL I2C clock input 7 SDA I2C data input 8 IN4 Input channel 4 9 IN5 Input channel 5 10 IN6 Input channel 6 11 OUT6 Output channel 6 12 OUT5 Output channel 5 13 OUT4 Output channel 4 14 GND Ground 15 REF Reference voltage output 16 VCC Power supply 17 A3 The 4th bit of address 18 OUT3 Output channel 3 19 OUT2 Output channel 2 20 OUT1 Output channel 1 "0" Usually connected to ground HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2004.08.03 Page 3 of 9 SC5358 FUNCTION DESCRIPTION 1. I2C bus interface SC5358 is connected to I2C bus via the SCL and SDA, controlled by MCU. Date validity A data on the SDA line must be stable when the SCL line is high state. It can be changed only when the SCL line is low state. Please refer to the figure below. Start and stop conditions A start condition is activated when the SCL is high state and the SDA shifts from high to low state. A stop condition is activated when the SCL is high state and the SDA shifts from low to high state. Please refer to the figure below. SDA SCL start condition stop condition Start and stop conditions are generated by MCU. The buses are busy after a start condition is activated and are idle after a while when a stop condition is activated. Byte format Every byte transmitted to the SDA line consists of 8 bits. Each byte must be followed by an acknowledge bit. The MSB is transmitted first. During the 9th clock pulse, MCU puts a resistive high level on the SDA line and waits for acknowledge signal. As a peripheral SC5358 must pull down the SDA line if acknowledging, or else keeps high state. Please refer to the figure below. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2004.08.03 Page 4 of 9 SC5358 2. Control of SC5358 A start condition An address byte including acknowledge bit N data bytes including acknowledge bits A stop condition Please refer to the figure below. The address byte of SC5358 can be set to 80H, 84H, 88H or 8CH through the 4th bit A3 and the 3rd bit A2. The descriptions of data bytes are as follows. 8-bit data MSB LSB Function 0 0 0 0 0 B2 B1 B0 channel 3 -10db/step 0 0 0 1 A3 A2 A1 A0 channel 3 -1db/step 0 0 1 0 0 B2 B1 B0 channel 4 -10db/step 0 0 1 1 A3 A2 A1 A0 channel 4 -1db/step 0 1 0 0 0 B2 B1 B0 channel 2 -10db/step 0 1 0 1 A3 A2 A1 A0 channel 2 -1db/step 0 1 1 0 0 B2 B1 B0 channel 5 -10db/step 0 1 1 1 A3 A2 A1 A0 channel 5 -1db/step 1 0 0 0 0 B2 B1 B0 channel 1 -10db/step 1 0 0 1 A3 A2 A1 A0 channel 1 -1db/step 1 0 1 0 0 B2 B1 B0 channel 6 -10db/step 1 0 1 1 A3 A2 A1 A0 channel 6 -1db/step 1 1 0 1 0 B2 B1 B0 all channels -10db/step 1 1 1 0 A3 A2 A1 A0 1 1 1 1 1 0 0 1 all channels -1db/step all channels mute Low 4-bit data Atten. dB A3 A2/B2 A1/B1 A0/B0 0 0 0 0 0/0 0 0 0 1 1/10 0 0 1 0 2/20 0 0 1 1 3/30 0 1 0 0 4/40 0 1 0 1 5/50 0 1 1 0 6/60 0 1 1 1 7/70 1 0 0 0 8/ 1 0 0 1 9/ SC5358 has no default setting, so it must be initialized. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2004.08.03 Page 5 of 9 SC5358 When adjusting the volume of a channel both a 10dB code and a 1dB code must be send just as follows. Example The setting of Channel 5 is -36dB. Start 1 0 0 0 1 0 0 0 ACK 0 1 1 0 0 0 1 1 ACK 0 1 1 1 0 1 1 0 ACK Stop Start 1 0 0 0 1 0 0 0 ACK 0 1 1 1 0 1 1 0 ACK 0 1 1 0 0 0 1 1 ACK Stop Address=88H -30dB Address=88H -6dB -6dB -30dB TYPICAL APPLICATION CIRCUIT (Address=88H) VCC 10 Vi2 Vi3 1 10 100K 100K MCU 10 Vi6 100K 100K 10 100K 10 F 100K OUT 3 18 3 IN 3 4 A2 A3 17 5 DGND Vcc 16 6 SCL REF 15 7 SDA GND 14 8 IN 4 OUT 4 13 10 F 0.1 F 10 F Vo2 Vo3 100K 10 F F Vo4 10 F F IN 5 OUT 5 12 10 F F 10 IN 6 OUT 6 11 100K HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Vo1 OUT 2 19 F 9 10 IN 2 I2C bus Vi4 F OUT 1 20 10 F 2 10 IN 1 F 100K Vi5 10 F Vi1 100K 100K Vo5 Vo6 100K REV:1.1 2004.08.03 Page 6 of 9 SC5358 PACKAGE OUTLINE DIP-20-300-2.54 Unit: mm 2.54 1.27 15 degree 26.4±0.3 0.51MIN 0.51 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 9.525 7.6±0.3 Unit: mm 10.2±0.4 SOP-20-375-1.27 REV:1.1 2004.08.03 Page 7 of 9 SC5358 HANDLING MOS DEVICES: Electrostatic charges can exist in many things. All of our MOS devices are internally protected against electrostatic discharge but they can be damaged if the following precautions are not taken: • Persons at a work bench should be earthed via a wrist strap. • Equipment cases should be earthed. • All tools used during assembly, including soldering tools and solder baths, must be earthed. • MOS devices should be packed for dispatch in antistatic/conductive containers. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2004.08.03 Page 8 of 9 SC5358 ATTACHMENT Revision History Data REV Description 2004.03.10 1.0 Original 2004.06.10 1.1 Modify the “ELECTRICAL CHARACTERISTICS” HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Page 3 REV:1.1 2004.08.03 Page 9 of 9