00W167A Audio sound processor IC BD3867AS Dimension (Units : mm) 3.4±0.2 Features 1) Volume and tone can be controlled directly from a microcomputer due to the adoption of I2C-BUS. 2) Low distortion volume and low noise VCA can reduce step-noise. 3) By use of an AGC circuit there is better blending of volume differences between input sources and an improvement in the audible S/N ratio. 4) Matrix surround circuit with phase shift technology. 5) Good channel balance at any volume attenuation. 6) Maximum volume attenuation value: -110dB (Typ.) 22 12 1 11 6.5±0.3 0.5 1Min. 19.4±0.3 3.95±0.3 Description The BD3867AS is an audio sound processor IC for TVs that can reduce step-noise by adopting a volume and tone circuit with VCA system. An AGC circuit and matrix surround circuit are also incorporated. This IC can process all audio sound control in TV. 7.62 0.3±0. 1 1.778 0.5±0. 1 0˚~15˚ SDIP22 Applications TV appliances such as DVD, PC, HDTV, Karaoke, digital broadcasting, and CATV Absolute Maximum Ratings (Ta=25˚C) Parameter Applied voltage Power dissipation Symbol Limits Vcc 10.0 1000 Pd Unit V * Operating temperature range Topr –40 ~ +85 Storage temperature range Tstg –55 ~ +125 mW ˚C ˚C *Derating : 10mW/˚C for operation above Ta=25˚C August, 2000 Recommended Operating Conditions(Ta=25˚C) Parameter Symbol Min. Typ. Max. Unit VCC 7.0 — 9.5 V Supply voltage Electrical characteristics (Unless otherwise noted,Ta=25˚C, Vcc=9V, f=1kHz, VIN=1Vrms, Rg=0Ω, RL=10kΩ, Volume 0dB, Bass 0db, Treble 0dB, Mute OFF, AGC OFF, Surround OFF, Loop OFF, Effect 0step) Parameter Symbol Min. Typ. Max. Unit Quiescent current IQ Voltage gain Gv — –1.5 24 0 34 1.5 mA dB Channel balance Total harmonic distortion Output noise voltage Residual output noise voltage Cross talk Maximum output voltage Maximum attenuation Bass boost cut gain Treble boost cut gain AGC I/O level Conditions VIN=0Vrms CB –1.5 0 1.5 dB THD VNO — 0.01 0.1 % — 100 200 µVrms Volume 0dB, BPF=Din Audio VMNO — 3 10 CT VOM 65 75 — µVrms dB Volume–∞dB, BPF=Din Audio BPF=Din Audio 2.1 2.5 — ATTMAX — –110 –80 Vrms dB VB VT ±11 ±14 ±17 dB VAGC1 0.7 1 1.4 VAGC2 50 80 110 VAGC3 90 130 170 VAGC4 160 210 260 VSMAX 7 9.5 12 dB VOUT=1Vrms, BPF=400~30kHz THD=1% Volume–∞dB, BPF=Din Audio f=100Hz f=10kHz mVrms AGC ON, VIN=1mVrms mVrms AGC ON, VIN=50mVrms mVrms AGC ON, VIN=110mVrms mVrms AGC ON, VIN=1Vrms Surround gain VSMIN 0 2.5 5 dB Surround ON, Effect 15 step Surround ON, Effect 0 step Mute attenuatio ATTMU — –110 –80 dB Mute ON, BPF=Din Audio Surround gain Application circuit 10µ 100k 10µ 10µ 0.068µ 1000p 0.1µ 4.7µ 4.7µ 4.7µ 4.7µ + + + + + + 21 IN1 19 FB1 VOL AGC LS1 20 18 FT1 17 OUT1 PS 16 15 VCC 14 SB ST 13 12 SV2 SV1 VOL 22 TONE Surround I2C BUS Logic 1 VCC 2 VOL VOL AGC 20k TONE 20k BD3867AS LS2 1 IN2 2 FB2 3 FT2 4 6 + + + OUT2 VREF GND 5 AD1 8 AD2 9 SCL 10 SDA 11 + 10µ 0.068µ 1000p 220k 4.7µ 7 47µ 10µ Slave address I2C BUS Select Interface