BH3868BFS Rohm Semiconductor, BH3868BFS Datasheet
BH3868BFS
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BH3868BFS Summary of contents
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... Audio ICs Audio sound processor with BH3868BFS BH3868BFS is a Audio sound processor IC developed for TV. This IC is built-in volume, balance, tone, surround, BBE processor and AGC. This IC can be easily controlled by tow-wire serial control (I ∗ BBE is a registered trade mark of BBE Sound Inc. ...
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... Audio ICs ! ! ! ! Block diagram 17 SCL 18 SDA VC1 21 OUT1 22 TRE1 23 BAS1 24 BTREB1 25 BTREA1 26 BBASB1 27 BBASA1 28 IN1 29 PS2 30 PS1 31 AGCADJ 32 FILTER BH3868BFS 16 CHIP VC2 12 OUT2 11 TRE2 10 BAS2 9 BTREB2 8 BTREA2 7 BBASB2 6 BBASA2 5 IN2 4 SOUT 3 LS2 2 LS1 1 GND 2/27 ...
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... BBASA1 1chBBE contour frequency setting terminal 28 IN1 1ch sound signal input terminal 29 PS1 1st phase shift setting terminal 30 PS2 2nd phase shift setting terminal 31 AGCADJ AGC suppression level setting terminal 32 FILTER Filter terminal Function BH3868BFS 3/27 ...
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... GND V CC 4pin 10k GND V CC 5pin 28pin 30k GND BH3868BFS Description Terminal to set a time constant at a side for suppressing a signal level of AGC. Terminal to set a time constant at a side for amplifying a signal level of AGC. Terminal for output of surround and pseudo stereo and to set a frequency characteristic ...
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... GND V CC 200 7pin 26pin 200 GND V CC 8pin 25pin 21.5k GND V CC 200 9pin 24pin 200 GND BH3868BFS Description Terminal to set a contour frequency of BBE. Terminal to set a contour frequency of BBE. Terminal to set a process frequency of BBE. Terminal to set a process frequency of BBE. 5/27 ...
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... GND V CC 13pin 20pin 30kΩ GND BH3868BFS Description Terminal to the cutoff frequency of bass tone control. Terminal to the cutoff frequency of treble tone control. Terminal for sound signal output. Terminal equipped with an external circuit to prevent a shock sound upon volume switching ...
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... GND V CC 250k 16pin GND V CC 17pin GND V CC 18pin 50 GND BH3868BFS Description Terminal equipped with an external circuit to prevent a shock sound upon tone switching. Chip select terminal. Clock input terminal for BUS controller. Data input terminal for BUS controller. 7/27 ...
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... GND V CC 30pin 18k 18k GND V CC 20k 20k 31pin GND V CC 50k 32pin 50k GND BH3868BFS Description Terminal to set the 1st phase shift. 10k Terminal to set the 2nd phase shift. Terminal to set the cut levle of AGC. Filter terminal. 8/27 ...
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... THD 0.01 0.1 − NO1 − −1 1 − − OUT − − 5.5 IH −0 1.5 IL BH3868BFS Unit Conditions mA No signal THD=1 =−20dB (ATT) V rms V THD=1% rms = rms IN = rms IN = rms IN =100mV dB 100Hz, V rms IN =100mV dB 100Hz, V rms IN =100mV dB 10kHz, V rms IN =100mV dB ...
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... Fig.1 Definition of timing on the BUS devices Symbol f SCL t BUF STA t LOW t HIGH STA DAT DAT STO Cb BH3868BFS STA STO C BUS Min. Max. Unit 0 100 kHz − µs 4.7 − µs 4.0 − µs 4.7 − µs 4.0 − µs 4.7 0 ∗ ...
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... I C BUS devices Symbol hys OL1 (V ) OL2 with a bus capacitance t OF OL1 OL2 for the SDA and SCL bus lines quoted in Table B (300ns) is longer F BH3868BFS Min. Max. Unit −0.5 1.5 V (−0.5) (0 ∗1 3 ∗ n/a n/a (n/a) (n/a) n/a n/a ...
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... Audio ICs 2 ( BUS format MSB S Slave Address 1bit 8bit • S • Slave Address • A • Select Address • Data • P Slave Address of BH3868BFS Fixing 16pin MSB Making 16pin OPEN MSB (3) Setting of Select Address Parameter 0 1ch Volume 1 2ch Volume 2 BBE Processor 3 BBE, Bass ...
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... AGC SON SSTE SMON ATT 0dB ATT -∞dB Max. Min. Max. Min. Max. Min OFF L : OFF(AGC : Auto Gain Control OFF L : OFF(LOOP : surround effect enhanceer OFF(SSTE : Surround STEreo OFF(SMON : Surround MONoral OFF(SON : Surround ON) BH3868BFS LSB Contour Bass Treble LOOP Surround Effect 13/27 ...
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... BH3868BFS 14/27 ...
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... Treble / Bass setting list Treble Gain Gain (dB) Hex. Notation +15 7FH +15 3FH +14 36H +12 32H +10 2FH +8 2DH +6 2BH +4 29H +2 26H 0 20H −2 1AH −4 17H −6 15H −8 13H −10 11H −12 0EH −14 0AH −15 00H BH3868BFS 15/27 ...
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... BBE Gain Process Gain (dB) Hex. Notation 10.0 FH 9.0 EH 8.0 DH 7.0 CH 6.0 BH 5.5 AH 5.0 9H 4.5 8H 4.0 7H 3.5 6H 3.0 5H 2.5 4H 2.0 3H 1.5 2H 1 BH3868BFS 16/27 ...
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... This IC is equipped with the automatic increment function to improve the rate of data transfer. In addition to the data format shown in the under-mentioned Basic Format, the other data format Automatic Increment is also available for the data transfer. 1) Basic format MSB S Slave Address LSB MSB LSB A Select Address A BH3868BFS MSB LSB Data A P 17/27 ...
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... Data1, Data2, · · · · · , DataN LSB MSB LSB MSB A Data A Select Address 2 AGCADJ Terminal Voltage (V) 100 3.8 200 3.45 300 3.1 400 2.75 0.01 0.1 INPUT (V ) rms Fig.2 AGC characteristics BH3868BFS LSB A P LSB MSB LSB A Data 18/27 ...
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... R An amplifier to define the sound effect 1µ × C Attack Time 1 × C Recovery Time 1 decreases, the distortion rate becomes worse. If the resistance value SOUT + 4 1 − 0.0047µ Frequency [Hz] BH3868BFS 20k LS2 R L2 1Meg Detector circuit of amplification × × 2π 2πC ...
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... R 18k 0.1µ 1 ∆ t × P × Phase shifter Effect control LPF ∆ t × P ∆ t × P × Phase shifter Effect control BH3868BFS Resistance 18kΩ (Typ.). φ = −2tan − 2π ∆ t ∆ (L−R) E OUT − − ∆ t ∆ (L−R) E ...
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... C (Hz) + − 30k 23pin 10pin C Equivalent Circuit 2π × 21.5k × 0.033µ 2π × 21.5k × 0.0033µ 60.3kHz 2π × 56.2k × 47p Gain Gain Gain BH3868BFS 224Hz 2.24kHz 3dB f C3 Freq. 3dB f C Freq. 21/27 ...
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... Audio ICs Setting of treble frequncy 2π × 30k × C (Hz 2π × 30k × 60p − + 30k 22pin 11pin C Equivalent Circuit 88k (Hz) + − 30k 60p Gain BH3868BFS 3dB Gain f 88k C1 Freq. 22/27 ...
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... Audio ICs ! ! ! ! Application Fig.3 BH3868BFS 23/27 ...
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... INPUT VOLTAGE : V (V rms IN Fig.5 THD −10 −20 −30 −40 −50 −60 −70 −80 −90 ATTENUATION : V (dB) ATT Fig.8 Noise level BH3868BFS +20 treble boost bass boost +16 + flat −0 −4 −8 −12 −16 bass cut − 100 200 500 1k 2k ...
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... The BBE sound processor considers a loudspeaker and amplifier as total audio system, reproduces accurately “Rise of Sound” which characterizes the sound appropriate signal processing at a stage before amplifier input, and makes the playback sound an original one as naturally as possible. R Every terminal + − C (External) R value (kΩ) V C1 BH3868BFS 25/27 ...
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... However, if Treble is clear, it may seem that Bass is insufficient. This can be corrected by applying the gain to Bass. There are many audio system characteristics. The most suitable correction effect for your system can be obtained by BBE. 20k f (Hz) BH3868BFS 26/27 ...
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... License agreement about patent and trademark BBE is a registered trademark of BBE Sound Inc. Only authorized party, who is permitted to use the trademark and patent of BBE, can supply and sell BH3868BFS. For such trademark and patent of BBE, please contact : BBE Sound lnc. ...
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Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...