SC9260 2-CH ELECTRONIC VOLUME CONTROLLER CONTROLLED BY SERIAL INTERFACE WITH LOUDNESS CONTROL DESCRIPTION The SC9260 and SC9260S are an optimum CMOS with I2C interface on Chip, which has been designed for electrification of volume control of audio equipment, etc. FEATURES DIP-16-300-2.54 * Attenuation can be controlled from 0dB to -78dB by 2dB/step. * This ICs feature a built-180in loudness circuit.(20dB tap) * The volume, balance and loudness circuits can be controlled by I2C series data. SOP-16-300-1.27 * CS (Chip Select) input allows control of up to 2 of this chip on the same bus. * Use Polysilicon resistors enable low-distortion, high-performance volume system. * Package is DIP-16 and SOP-16 APPLICATIONS ORDERING INFORMATION Device Package SC9260 DIP-16-300-2.54 SC9260S SOP-16-300-1.27 * Digital volume control Radio * CD, VCD and DVD system volume control * DTS system volume control * Audio system volume control BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 1 of SC9260 ABSOLUTE MAXIMUM RATINGS (Tamb=25°C) Characteristics Symbol Value Unit Supply Voltage VDD -0.3~15 V Input Voltage VIN -0.3~VDD+0.3 V Power Dissipation PD 300 mW Operating Temperature Topr -40~85 °C Storage Temperature Tstg -55~150 °C ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Tamb=25°C, VDD=9 V) Characteristics Symbol Test condition Operating Supply Voltage VDD Tamb=-40~85°C Operating Supply Current IDD No load Input Voltage “H”Level VIH(1) CK, DATA, STB input pin “L”Level VIL(1) VDD=4.5~12V “H”Level VIH(2) Input Current “L”Level VIL(2) “H”Level IIH “L”Level IIL All input pin V - 0.3 1.0 mA 4.0 - VDD 0 - 1.0 - VDD VIL=0V -1 - 1 20 28 37 kΩ - 250 600 Ω - 0 ±2 dB - 0 ±3 % - 0.01 - % - 100 - dB - 100 - dB - 2.0 - µVrms kHz ∆ATT Volume error between left and right 0dB dB 3 ATTM VIN=1Vrms Cross Talk CT RL=100KΩ Output Noise Voltage VN Rg=600Ω Operation Frequency fop CK, DATA, STB - - 500 TCK CK input - 0.5 1.0 TSTB STB input - 1.0 2.0 Minimum Pulse Width HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 V 1 Attenuation Error fIN=1kHz VDDx0. V - - Maximum Attenuation 12 -1 RON THD 9.0 VIH=VDD Analog Switch ON Resistance Total Harmonic Distortion 4.5 - Loudness “OFF” And Right Unit 0 RVR ∆RVR Max. 7 Volume Resistance Value Volume Balance Between Left Typ. VDDx0. CS input pin Input Voltage Min. 0dB REV:1.0 µA µs 2004.08.03 Page 2 of SC9260 PIN CONFIGURATION PIN DESCRIPTIONS Pin no. Pin name 1 VSS Description 2 L-OUT 3 L-IN 4 L-LD1 Left channel tap output pins for loudness (1) 5 L-LD2 Left channel tap output pins for loudness (2) 6 L-GND Analog ground pins Digital ground pin Left channel volume output pin Left channel volume input pin Chip select input pin. Input pin for designating chip select code. This pin correspond to bit 7 CS “C1”which is chip select bit in serial data. When CS=”1”and C1=”1”, data is valid. When CS=”0”and C1=”0”, data is valid. 8 CK Clock input pin. Clock input for data transfer. Data input pin. 9 DATA Attenuation channel selection data input terminal. Data consists of 13 bits and input by CK signal. Strobe input pin. 10 STB Attenuation setting signal take from DATA and CK terminals are latched when this terminal is placed at “H”level. 11 R-GND Analog ground pins 12 R-LD2 Right channel tap output pins for loudness (2) 13 R-LD1 14 R-IN 15 R-OUT Right channel tap output pins for loudness (1) Right channel volume input pin Right channel volume output pin HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 3 of SC9260 16 VDD Power supply pin. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 4 of SC9260 FUNCTION DESCRIPTION 1. Volume circuit Volume circuit consist of ladder resistor and analog switch. Tap for loudness is connected to step 10 (20dB). Loudness operation is controlled by LS1/LS2 switches. Equivalence circuit Volume step and attenuation Step attenuation K0 0(dB) K21 42 K1 2 K22 44 K2 4 K23 46 K3 6 K24 48 K4 8 K25 50 K5 10 K26 52 K6 12 K27 54 K7 14 K28 56 K8 16 K29 58 K9 18 K30 60 K10 20 K31 62 K11 22 K32 64 K12 24 K33 66 K13 26 K34 68 K14 28 K35 70 K15 30 K36 72 K16 32 K37 74 K17 34 K38 76 K18 36 K39 78 K19 38 K40 K20 40 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 step attenuation REV:1.0 2004.08.03 Page 5 of SC9260 Loudness ON: LS1=ON, LS2=OFF Loudness OFF: LS1=OFF, LS2=ON. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 6 of SC9260 2. Setting volume values Optional attenuation data is input through the DATA, CK and STB terminals. Data consists of 18 bits as follows (1) Serial data format (2)Chip select code (C1~C4) Chip select code is set to use serial bus line in common with other ICs. Data C2, C3, C4 is fixed 0, 1, 1 in SC9260. When level of CS input pin (7 pin) correspond to C1 bit, data is valid. (3)L is left-channel select data; R is right-channel select data (L/R) When L=1, left-channel volume is set; when R=1, right-channel volume is set. (When R=L=1, both channel volume are set simultaneously). (4)LD is loudness setting data When LD=”0”, loudness is OFF (LS1=OFF, LS2=ON) When LD=”1”, loudness is ON (LS1=ON, LS2=OFF) (5)Volume setting data (D1~D6) List of volume data and step Enabled Switch K0 K1 K2 K3 D1 D2 D3 D4 D5 D6 0 1 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Enabled Switch K20 K21 K22 K23 K4 K5 K6 K7 0 1 0 1 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 K8 K9 K10 K11 0 1 0 1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 K12 K13 K14 K15 0 1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 K16 K17 K18 K19 0 1 0 1 0 0 1 1 0 0 0 0 0 0 0 0 D1 D2 D3 D4 D5 D6 0 1 0 1 0 0 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 K24 K25 K26 K27 0 1 0 1 0 0 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 K28 K29 K30 K31 0 1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 K32 K33 K34 K35 0 1 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 K36 K37 K38 K39 K40 0 1 0 1 0 0 0 1 1 0 1 1 1 1 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 7 of SC9260 (Note) if data other than those listed above are input, volume values are undefined. (6)Serial data timing Input CK, DATA and STB according to the following timing. TEST CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 8 of SC9260 TYPICAL APPLICATION CIRCUIT Note: L-ch circuit is loudness operation; R-ch circuit is without loudness. R1=8.2kΩ, C1=1500pF C2=0.1µF For preventing noise when loudness is turned on or off, R=22kΩ~470kΩ High- frequency digital signals are input to pins CK, DATA and STB. Since these signals may cause noise in analog circuits, either use shield wire for CK, DATA, and STB signal lines, or design the pattern so that these signal lines are protected by the ground line. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 9 of SC9260 PACKAGE OUTLINE DIP-16-300-2.54 UNIT: mm SOP-16-300-1.27 UNIT: mm HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 10 of SC9260 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 12 REV:1.0 2004.08.03 Page 11 of SC9260 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 12 REV:1.0 2004.08.03 Page 12 of