BH3856 ROHM [Rohm], BH3856 Datasheet
BH3856
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BH3856 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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... 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 ...
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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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... Please install a capacitor of about 10µF to the filter pin. 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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... R 10 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 ∗ ...
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... V V 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 ...
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... 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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... 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 ...
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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 ...
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... −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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... Audio ICs (7) Digital / analog separation The digital and analog power supplies and grounds for this IC (BH3856) are completely separate. The digital circuits are supplied from a stable reference source that is on the chip (V timing shifts, on interference due to digital noise. (8) Matrix surround + L → ...
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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± ...