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| 00W167A Audio sound processor IC BD3867AS 0.5 1Min. 1 11 6.50.3 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. Dimension (Units : mm) 19.40.3 22 12 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.) Applications 3.950.3 7.62 3.40.2 0.30. 1 1.778 0.50. 1 0~15 SDIP22 TV appliances such as DVD, PC, HDTV, Karaoke, digital broadcasting, and CATV Absolute Maximum Ratings (Ta=25C) Parameter Applied voltage Power dissipation Operating temperature range Storage temperature range *Derating : 10mW/C for operation above Ta=25C Symbol Vcc Pd Topr Tstg -40 -55 Limits 10.0 1000 ~ ~ * Unit V mW +85 +125 C C August, 2000 Recommended Operating Conditions(Ta=25C) Parameter Supply voltage Symbol VCC Min. 7.0 Typ. -- Max. 9.5 Unit V Electrical characteristics (Unless otherwise noted,Ta=25C, Vcc=9V, f=1kHz, VIN=1Vrms, Rg=0, RL=10k, Volume 0dB, Bass 0db, Treble 0dB, Mute OFF, AGC OFF, Surround OFF, Loop OFF, Effect 0step) Parameter Quiescent current Voltage gain 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 Symbol IQ Gv CB THD VNO VMNO CT VOM ATTMAX VB VT VAGC1 AGC I/O level Surround gain Surround gain Mute attenuatio VAGC2 VAGC3 VAGC4 VSMAX VSMIN ATTMU Min. -- -1.5 -1.5 -- -- -- 65 2.1 -- 11 0.7 50 90 160 7 0 -- Typ. 24 0 0 0.01 100 3 75 2.5 -110 14 1 80 130 210 9.5 2.5 -110 Max. 34 1.5 1.5 0.1 200 10 -- -- -80 17 1.4 110 170 260 12 5 -80 Unit mA dB dB % Vrms Vrms dB Vrms dB dB VOUT=1Vrms, BPF=400~30kHz Volume 0dB, BPF=Din Audio Volume-dB, BPF=Din Audio BPF=Din Audio THD=1% Volume-dB, BPF=Din Audio f=100Hz f=10kHz Conditions VIN=0Vrms mVrms AGC ON, VIN=1mVrms mVrms AGC ON, VIN=50mVrms mVrms AGC ON, VIN=110mVrms mVrms AGC ON, VIN=1Vrms dB dB dB Surround ON, Effect 15 step Surround ON, Effect 0 step Mute ON, BPF=Din Audio Application circuit 10 100k 10 0.068 1000p + 10 0.1 4.7 4.7 4.7 4.7 + 22 LS1 21 IN1 20 FB1 19 FT1 18 17 16 VCC + 15 SB + 14 ST + 13 SV2 + 12 SV1 OUT1 PS AGC VOL TONE VOL I2C BUS Logic Surround 20k AGC VOL TONE VOL 1 VCC 2 20k BD3867AS LS2 1 IN2 2 + + 10 0.068 1000p 220k 4.7 10 47 Slave address Select I2C BUS Interface FB2 3 4 FT2 OUT2 VREF GND 5 + 6 + 7 AD1 8 AD2 9 SCL 10 SDA 11 |
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