BH3856S Rohm Semiconductor, BH3856S Datasheet
BH3856S
Specifications of BH3856S
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BH3856S Summary of contents
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... IC BH3856S / BH3856FS The BH3856S and BH3856FS are signal processing ICs designed for volume and tone control in televisions, mini component stereo systems, and other audio products. Their two-line serial control (I volume and tone on the basis of signals from a microcomputer, etc. ...
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... Volume Volume 6 Matrix surround 7 TIN1 8 2.1k 2. − − Volume Volume 30k V CC 30k SC 12 200k 30k SDA 13 30k N.C. 14 SCL 15 Reference Voltage 16 BH3856S / BH3856FS 30 FILTER 29 IN2 BVN2 28 BIN2 27 BVO2 26 TVN2 25 TIN2 24 TVO2 23 OUT2 22 VC1 21 VC2 ref SLAVE ADDRESS 16 SELECT SW FILTER 32 IN2 ...
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... Time constant pin for prevention of switching shock Time constant pin for prevention of switching shock Channel 2 volume output Channel 2 treble filter Channel 2 treble filter Channel 2 treble filter Channel 2 bass filter Channel 2 bass filter Channel 2 bass filter Channel 2 volulme input Filter Not connected internally. BH3856S / BH3856FS ...
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... Has built-in precharge and discharge circuits. 32pin 30kΩ 25kΩ Pin for high band filter connection. 7pin 26pin Pin for high band filter connection. 2.1kΩ 2/1V CC BH3856S / BH3856FS Description ∗ The pin numbers are for the BH3856S. ...
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... This pin is for connection to the high-band filter. · bass input pin SDA : serial data line SCL : serial clock line · Slave address selection pin SASS: slave address selection switch ∗ The pin numbers are for the BH3856S. ...
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... IN − − Ω OUT − − − − − − BH3856S / BH3856FS Conditions No signal THD=1%, VOL=−20dB (ATT) THD=1% =1 Vrms V IN Vo=1 Vrms Vo=1 Vrms =100m Vrms 100Hz =100m Vrms 100Hz =100m Vrms 100kHz =100m Vrms 100kHz ∗ Vo=1 Vrms ~ Vo=0 ...
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... C2 0.1µF 10µ 2200pF C4 2200pF 10µF 10k THD 10µF 10µ Note : Diagram depicts the BH3856S. 30k 30k − 47k 47k − − 4 5.1k 5 Volume Volume 6 Matrix surround 7 2. − − Volume Volume V CC 200k Reference voltage BH3856S Fig.1 BH3856S / BH3856FS 1000µF 30 0.47µ ...
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... S U;STO t 4.7 BUF t 250 S U;DAT LOW HIGH STA HD ; STA STO BUF DAT BUS timing rules BH3856S / BH3856FS Max. Unit − 100 kHz − − µs − − µs − µs 1 − µs 0.3 − − µs − − µs − − ...
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... Slave address = IC recognition. Upper 7 bits are random. Bottom bit is “L” for the sake of overwrite. • acknowledge bit (recognition of acknowledgment) • Select address = selection between volume, bass, treble and matrix surround. • Data = volume and tone data • stop condition (stop bit recognition) (3) BH3856S / BH3856FS slave address MSB ...
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... D7 D6 LSB VL7 VL6 VR7 VR6 Data Output + (2L−R) + Output (2R−L) BH3856S / BH3856FS Data VL4 VL2 VL1 VL0 VL5 VL3 VR5 VR4 VR3 VR2 VR1 VR0 BA5 BA4 BA3 BA2 BA1 BA0 TR5 TR4 TR3 TR2 TR1 TR0 SR0 LSB LSB ...
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... DATA ATT (HEX) (dB −1 38 −2 35 −3 33 −4 31 −5 2F −6 2E −7 2D −8 2C −9 2B −10 2A −11 29 −12 27 −13 26 −14 25 −15 1F BH3856S / BH3856FS ATT DATA (dB) (HEX) −56 42 −58 3F −60 3C −62 39 −64 36 −66 34 −68 32 −70 2F −72 2D −74 2A −76 28 −78 26 −80 24 −82 22 −84 20 −86 1E −90 1A − ...
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... Audio ICs ! ! ! ! Application example 0.47µ 10µ 33µF DGND MICRO COMPUTER Note : Diagram depicts the BH3856S. 30k 30k 1 + − 47k 47k 0.1µ − − 4 5.1k 0.1µF 5 Volume Volume 6 Matrix surround 2200pF 7 2.1k 2200pF 8 9 − Volume Volume 200k 12 13 ...
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... × 5kΩ 5.1kΩ 50kΩ (When −5 1.0 × 5 1. −3dB R2 50kΩ − ) Vcc can be varied according to the value of C.BIN 0 1 − × gain is the sum of the gain for each of the internal circuits BH3856S / BH3856FS Frequency f: (Hz ∆f ...
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... Use this when fine setting is required. The setting limits are bits for volume (256 steps) and 6 bits (64 steps) for tone. −3dB R2 25kΩ − ) Vcc 1 − × determined by the this in combination with the internal circuit VC1, VC2, BC BH3856S / BH3856FS Frequency f: (Hz ∆f R value (kΩ) 30 200 ...
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... When using long digital and analog ground lines, take care to ensure that there is no potential difference between the two ground lines. (3.8V)). For this reason, there is no need to worry about ref Output (2L-R) Output (2R-L) . ref to the terminals. ref terminal should be connected to the digital GND. ref BH3856S / BH3856FS , the ref ...
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... 1kHz 0.4 0.1 0.04 0.01 −40 −30 −20 −10 0 (dBV) INPUT VOLTAGE : V IN Fig.4 Total harmonic distortion vs. Input voltage BH3856FS 16 15 10.16 ~ 0° 15° 0.5±0.1 BH3856S / BH3856FS −5 −10 −15 −20 − 100 1k 10k (Hz) FREQUENCY : f Fig. 5 Output gain vs. Frequency 13.6±0.2 ...
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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 ...