SC5388S

Silan Semiconductors 5-MODE PRESET EQUALIZER IC DESCRIPTION The SC5388 is a 2-channel digital preset equalizer utilizing CMOS technology. It provides 5 different sound selections, namely: Flat/normal, rock, Pops, Classic and Jazz. A Bass Booster may be added any of 5 sound selections, thereby creating more audio versatility. SC5388 provides two types of key selection mode namely: the Direct and the Cyclic. Pin assignment and application circuit are optimized for cost saving advantages and easy PCB layout. SC5388 SDIP-24 FEATURES * Wide operating voltage range(VCC=5.0V ~ 11.0V) * Low total harmonic distortion and high S/N ratio (THD+N 95dB) * LED display output mode * Less external parts * 5-sound selections provided * Bass booster function * Direct and cyclic key selection provided * 2-Channel output SOP-24 ORDERING INFORMATION SC5388 SC5388S SDIP-24 Package SOP-24 Package APPLICATIONS * Walkman * Car Audio * Fader and MPEG Card * Multimedia Audio components PIN CONFIGURATIONS INL BL1 BL2 TL OUTL VCC BIAS GND SEL 1 2 3 4 5 6 7 8 9 24 INR 23 BR1 22 BR2 21 TR 20 OUTR SC5388 19 JAZZ 18 CLASSIC 17 POPS 16 ROCK 15 FLAT 14 BLED 13 N.C. MUTE 10 CYC 11 BB 12 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 1 Silan Semiconductors BLOCK DIAGRAM 6 INL 1 BL1 2 BL2 3 Gain Selector Buffer Bass SC5388 VCC 5 OUTL Treble 4 TL 20 OUTR INR 24 BR1 23 BR2 22 Control Unit Mute Buffer Bass Treble 21 TR 10 MUTE GND 8 14 BLED 15 Flat 16 Rock 17 Pops 18 Classic 19 Jazz 11 CYC 9 SEL 12 BB 7 13 N.C. BIAS ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VCC VIN PD Topr Tstg Value 11.0 0.3 ~ VCC+0.3V 200 -20 ~ +75 -40+125 Unit V V mW °C °C ELECTRICAL CHARACTERISTICS Parameter Operating Supply Voltage Operating Supply Current Maximum Output Voltage Output Noise Total Harmonic Distortion Input impedance Output impedance Maximum Input Voltage (Tamb=25°C VCC=9.0V,Vi=1Vrms, f=1kHz, Unless otherwise specified) Symbol VCC ICC VOM VNO THD RIN ROUT VI(max) Test conditions Vcc=9v,Vi=0,Flat Mode Vcc=9.0V Vcc=9.0V,Vi=0, BW=400~30kHz , A-weighting Vcc=9.0V,Vi=0.2Vrms, BW=400~30kHz , A-weighting Vcc=9.0V Vcc=9.0V Vcc=9.0V Min 5.0 3.5 Typ 9.0 11 Max 11.0 Unit V mA Vrms µVrms % kΩ kΩ Vrms 20 0.02 50 60 5.5 2.0 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 2 Silan Semiconductors PIN DESCIPTION Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 SC5388 Description Left Channel Input. Left Bass Control Pin 1. A Capacitor may be Connected between this Pin and BL2 Left Bass Control Pin 2. A Capacitor may be Connected between this Pin and BL1. Left Treble Control Pin . A Capacitor may be Connected between this Pin and OUTL. Left Channel Output in. Positive Supply Voltage. A capacitor may be connected between this Pin and GND. Ground. Select Control Pin. Mute Pin. The Mute Pin can eliminate the noise when mode changing occurs. A capacitor is connected between this Pin and GND. Cyclic Select Pin. Bass Booster Control Input Pin. No Connected. Bass Booster Control Input Pin. FLAT Mode Display & Control Input Pin. ROCK Mode Display & Control Input Pin. POPS Mode Display & Control Input Pin. CLASSIC Mode Display & Control Input Pin. JASS Mode Display & Control Input Pin. Right Channel Output in. Right Bass Control Pin 1. A Capacitor may be Connected between this Pin and BR2. Right Bass Control Pin 2. A Capacitor may be Connected between this Pin and BR1. Right Treble Control Pin . A Capacitor may be Connected between this Pin and OUTR. Right Channel Input. Pin Name INL BL1 BL2 TL OUTL VCC BIAS GND SEL MUTE CYC BB NC BLED FLAT ROCK POPS CLASSIC JASS OUTR BR1 BR2 TR INR I/O I ---O ---I -I I -O I/O I/O I/O I/O I/O O ---I FUNCTIONAL DESCRIPTION The SC5388 is a 2-channel and 5-Mode digital preset equalizer with a Bass Booster function. It provides two types of key selection mode namely: the Direct and the Cyclic. These two key selection Modes are determined by SEL pin. Please refer to the table below: Key Selection Mode SEL Pin Description Press FLAT key to activate Flat Mode Press ROCK key to activate Rock Mode Direct Low Press POPS key to activate Pops Mode Press CLASSIC key to activate Classic Mode Press JAZZ key to activate Jazz Mode ...Flat→ Rock →Pops→ Classic→ Jazz →Flat→Rock... Cyclic Floating/High Note: 1). The Bass Booster can be controlled in the same manner under the Direct or the Cyclic Key selection Mode. To turn the Bass Booster ON or OFF, press the BB Key. 2). Under the Cyclic Selection mode, press the CYC Key, to go to the next sound selection. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 3 Silan Semiconductors 1. CYCLIC KEY SELECTION MODE SC5388 As seen in the table above, the cyclic key selection mode is active when the SEL pin is floating or “high”. Under this mode, any of the sound selections(Flat, Rock, Pops, classic, Jazz) may be selected by pressing the CYC key. The default value is the Flat Mode. This Means that when power is turned ON, the mode is active. Pressing the Cyclic Key lets you go from one sound selection to the other in the following order: Flat→ Rock →Pops→ Classic → Jazz. That is, press the CYC key to activate the next mode. The BB key controls the Bass Booster. When the power is turned ON, the bass Booster is OFF. 2. DIRECT KEY SELECTION MODE The direct key selection mode is active when the SEL pin is set to “LOW”. As the name implies, you can directly select the sound selection you like simply by pressing the respective keys. This means, that to select the JAZZ mode, press the JAZZ key, CLASSIC Mode ,press the CLASSIC key and so forth. Take note that when the power is turned On, the Flat Mode is active. The Bass Booster is independent of the key/sound mode selected and may be turned ON or OFF at any time. 3. FREQUENCY RESPONSE The Fig.1 ~ Fig.5 illustrate the various frequency response under the various sound selection(Flat, Rock, Pops, Classic, Jazz, and Bass Booster). Different sound selections exhibit different frequency gains at different frequency levels. Please refer to the table below: Sound Selection Flat Rock Pops Classic Jazz Flat + Bass Booster Rock + Bass Booster Pops + Bass Booster Classic + Bass Booster Jazz + Bass Booster f=80Hz 1.7 10.0 6.5 6.0 10.0 8.5 11.0 9.5 9.5 11.0 Typical f=1kHz -0.8 1.5 0.5 0.5 1.2 0.7 2.0 1.0 1.0 2.0 f=10kHz -1.3 7.0 7.0 1.0 3.3 1.0 7.0 7.0 1.0 2.5 Unit dB TREBLE AND BASS ADJUSTMENTS It is general knowledge that different individuals have different listening preference. The application circuit of SC5388 included in this specification has been designed for the taste general listening public; however, you can make the necessary adjustment to suit your personal taste. Please refer to the Section below. 1. TREBLE ADJUSTMENT The Treble adjustment is made by changing the value of the 2 capacitors connected between TL-OUTL, TROUTR, Please refer to Fig. 6. As the capacitor value becomes bigger, the treble of the gain frequency curve is shifted down. Likewise, as the capacitor value become smaller, the treble gain frequency curve shifts the opposite direction. Referring to the Fig.6. we see that at 6dB, different capacitor values exhibit different frequency response. Capacitor value 1800pF has a lower frequency gain response than 1200pF capacitor. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 4 Silan Semiconductors 2. BASS ADJUSTMENT SC5388 Bass adjustment can be made by changing the values of the capacitor connected between BL1~BL2 and BR1~BR2. Please refer to Fig.7. The larger the capacitor value used, the frequency response curve shifts down. Like wise, the smaller the capacitor value, the frequency response curve shifts the opposite direction. In Fig.7, at 9dB different capacitor value exhibit different frequency responses. A capacitor with a value of 0.1µF has smaller frequency response than 0.56µF capacitor. Fig.1 Flat Mode(Flat mode + Bass Booster) 12 10 8 Gain (dB) 6 4 Flat Mode + Bass Booster 2 Flat Mode 0 -2 10 100 1000 10k 100k Frequency (Hz) Fig.2 Rock Mode(Rock mode + Bass Booster) 12 10 8 Rock Mode + Bass Booster Rock Mode Gain (dB) 6 4 2 0 -2 10 100 1000 10k 100k Frequency (Hz) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 5 Silan Semiconductors Fig.3 Pops Mode(Pops mode + Bass Booster) 12 10 8 SC5388 Pops Mode + Bass Booster Gain (dB) 6 4 Pops Mode 2 0 -2 10 100 1000 10k 100k Frequency (Hz) Fig.4 Classic mode(Classic mode + Bass Booster) 12 10 8 Classic Mode + Bass Booster Gain (dB) 6 4 2 Classic Mode 0 -2 10 100 1000 10k 100k Frequency (Hz) Fig.5 Jazz Mode(Jazz mode + Bass Booster) 12 10 8 Jazz Mode + Bass Booster Jazz Mode Gain (dB) 6 4 2 0 -2 10 100 1000 10k 100k Frequency (Hz) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 6 Silan Semiconductors Fig.6 T L-OUT L Capacitors vs. Frequency Response 12 10 SC5388 1800pF 8 Gain (dB) 1500pF 6 4 2 0 -2 10 100 1200pF 1000 10k 100k Frequency (Hz) Fig.7 B L1-BL2 Capacitors vs. Frequency Response 12 10 8 0.56µF 0.68µF Gain (dB) 6 4 2 0.1µF 0 -2 10 100 1000 10k 100k Frequency (Hz) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 7 Silan Semiconductors APPLICATION CIRCUIT DIRECT KEY MODE IN L 1µF 1µF SC5388 IN R 1 INL 2 BL1 0.066µF INR BR1 BR2 TR OUTR JAZZ CLASSIC POPS ROCK FLAT BLED N.C. 24 23 0.066µF 3 BL2 5.6k 1500pF 22 1500pF VCC 5.6k 4.7k 4 TL 1500pF 21 1500pF OUT L VCC 1µF OUT R 5 OUTL 10k 20 1µF 6 VCC 7 BIAS 19 18 17 16 15 14 13 LED x 6 10k Jazz Classic Pops Rock Flat 100µF 0.1µF 0.1µF 47µF 8 GND 9 SEL 0.1µF 10 MUTE 11 CYC BB 12 BB SC5388 Note: Please use 0.068µF, 1500pF Mylar Capacitors. CYCLIC KEY MODE IN L 1µF 1µF IN R 1 INL 2 BL1 0.066µF INR BR1 BR2 TR OUTR JAZZ CLASSIC POPS ROCK FLAT BLED N.C. 24 23 0.066µF 3 BL2 5.6k 1500pF 22 1500pF 4 TL 1500pF 21 1500pF 5.6k OUT L VCC 10k 1µF OUT R 1µF 5 OUTL 6 VCC 7 BIAS 100µF 0.1µF 0.1µF 47µF 20 19 18 17 16 15 14 13 LED x 6 10k 8 GND 9 SEL 0.1µF 10 MUTE CYC BB VCC 4.7k 11 CYC 12 BB SC5388 Note: Please use 0.068µF, 1500pF Mylar Capacitors. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 8 Silan Semiconductors PACKAGE OUTLINE SC5388 UNIT: mm 2.54 SDIP-24-300-2.54 6.40 1.50 34.50 7.62 15 degree 3.51 0.46 SOP-24-375-1.27 3.30 5.08 UNIT: mm 10.45 7.70 1.27 15.74 15.34 0.41 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 9 1.95 9.53 0.25