00W025A Sound Processor IC BH3878KS2 Description Dimension (Units : mm) BH3878KS2 is a sound controller IC for mini component stereo. 5-channel input selector, vocal fader, volume, surround, 5-band graphic equalizer, dynamic bass, and 5-band spectrum analyzer are all integrated into this single chip. Switching noise is reduced when volume, vocal fader, surround and dynamic bass are changed by soft switch. 49 Features 1) All in one chip IC incorporating functions of volume, tone, and spectrum analyzer. 2) Soft switching that can reduce the stepping switching noise when volume, mode selector, surround, dynamic bass and the gain of graphic equalizer are switched. 3) 5-channel input selector, mode selector, volume, surround graphic equalizer, dynamic bass, and spectrum analyzer can be controlled by serial control from micro controller. 4) Built-in matrix surround, B.P.F for spectrum analyzer. 5) Low distortion, low noise by BiCMOS process using resistance ladder type volume. 6) Mode of dynamic bass and bi-amplifier can be switched. 17 1 16 0.65 0.3±0.1 0.5 32 64 1.4±0.1 0.1 14.0±0.3 12.0±0.2 14.0±0.3 12.0±0.2 48 33 0.125±0.1 0. 15 SQFP-T64 Applications Mini component stereo, micro component stereo, CD radio cassette player, TV Absolute Maximum Ratings (Ta=25˚C) Symbol Limits Unit Power supply voltage Vcc 10.0 V Power dissipation Pd mW Topr 1200 ∗ –20 ~ +70 Tstg –55 Parameter Operating temperature range Storage temperature range ∗Derating : 12.0mW/˚C for operation above Ta=25˚C ˚C ˚C ~ +125 Recommended Operating Conditions (Ta=25˚C) Parameter Power supply voltage Symbol Min. Typ. Max. Unit Vcc 8.5 9 9.5 V May, 2001 Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=9V, f=1kHz, Rg=600Ω, RL=10kΩ, Vin=800mVrms, INPUT SELECTOR=Ach, MODE SELECTOR=through, VOLUME=0dB, SURROUND=0dB, GRAPHIC EQUALIZER=0dB, DYNAMIC BASS=0dB, SPECTRUM ANALYZER=RESET) Parameter Circuit current at no signal Symbol IQ Min. — Typ. 40 Max. 60 Unit mA At no signal VOM 2.0 2.5 — Vrms THD=1% Maximum output voltage Voltage gain Conditions GV 0.8 2.8 4.8 dB Total harmonic distortion rate THD — 0.01 0.05 % Output noise voltage VNO — 35 50 µVrms Rg=0Ω, Biamp=0dB, DIN AUDIO VMNO — 5 20 µVrms Rg=0Ω, Volume=–∞ Biamp=0dB, DIN AUDIO CT ATTMAX 70 86 80 95 — — dB dB GVF 25 30 — dB VGQB ±9 ±12 ±15 dB Vin=200mVrms fin=100Hz, 300Hz,1kHz,3kHz, or 10kHz Residual noise voltage Cross talk Volume maximum attenuation Vocal fader suppressed quantity Graphic equalizer gain Surround maximum voltage gain Vo=1Vrms, 400Hz-30kHz BPF Rg=0Ω, Biamp=0dB, DIN AUDIO DIN AUDIO VSUMAX 5 7 9 dB Vin=300mVrms, fin=1kHz Dynamic bass boost gain VBB 15 18 21 dB Vin=100mVrms, fin=75Hz, 23pin=GND Microphone voltage gain GMIC 0.6 2.6 4.6 dB Vin=400mVrms Spectrum analyzer max. output level VMAX 4.0 4.8 — V Vin=–12dBV RECL DPLL1 DPLL2 DPLR1 DPLR2 PS1 F1L1 F1L2 F2L1 F2L2 F3L1 F3L2 F4L1 F4L2 F5L HPFL1 HPFL2 HPFL3 BASS1 BASS2 51 57 58 59 60 60 63 64 3 4 7 8 11 12 15 17 18 19 25 26 VFC1 VFC2 53 55 56 59 MIC Block Diagram 28 FILTER 54 GND 30 INLD 47 HPF –30dB ~ –∞ 0~30dB –6dB 30 VCC Vcc 1 2 Vcc 30 –5dB INLE 49 2.8dB 30 32 OUTL 10K 5BAND EQ L-R 2.6dB 10K INRA 42 27 BASS3 VCA 29 CAP FILTER 29 PS INLA 41 EFFECT INLB 43 MODE SELECTOR INLC 45 5BAND EQ 2.8dB INRB 44 31 31 OUTR INRC 46 INRD 48 HPF 105Hz DET DET DET DET DET –6dB INRE 50 DET DIGITAL 1KHz DET RECR 52 33 STEPC DET DET ALCR ALCC BPOUT F1R1 F1R2 F2R1 F2R2 F3R1 F3R2 F4R1 F4R2 F5R A B C 22 24 23 22 20 21 22 HPFR1 HPFR2 HPFR3 BH3878KS2 36 37 38 39 1 2 5 6 9 10 13 14 16 20 BPNF ALC 16 14 13 10 40 22K 34 SI MPX 10.5KHz 40 35 SCK 33 3.4KHz 10.5KHz 3.4Hz CONTROL 34 DET –5dB 35 340Hz