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PDF BH3866AS Data sheet ( Hoja de datos )

Número de pieza BH3866AS
Descripción Dual-line serial control sound processor IC
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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No Preview Available ! BH3866AS Hoja de datos, Descripción, Manual

Video ICs
Dual-line serial control sound
processor IC
BH3866AS
The BH3866AS is a signal processing IC developed for the control of volume and tone quality in TV equipment.
Since dual-line serial control (I2C BUS) is used, the volume level and tone quality in TV equipment can be changed
using signals such as those from a microcomputer or similar device.
Applications
DVDs, personal computers, high-vision TVs, karaoke sets, digital broadcasts, CATVs, and other TV equipment
Features
1) 3-channel volume and sound quality control (for
stereo and center speakers).
2) Absorption of volume deviation between input
sources and improved S / N ratio, for better sound
quality, using an AGC circuit.
3) Control through I2C BUS serial control.
4) Internal pseudo-stereo circuit provides phase-shift
matrix surround effect.
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Power supply voltage
Power dissipation
VCC
Pd
10.0
1250
Operating temperature
Topr
– 25 ~ + 75
Storage temperature
Tstg
– 55 ~ + 125
Reduced by 12.5mW for each increase in Ta of 1°C over 25°C.
Unit
V
mW
°C
°C
Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol
VCC
Min.
7.0
Typ.
Max.
9.5
Unit
V
1

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BH3866AS pdf
Video ICs
Pin No. Pin name Pin voltage Zin I / O
VCC
Equivalent circuit
9 STB
25 STT
— 30k —
30k
GND
DAC
VCC
10 RT
22 CT 4.5V 30k —
24 LT
GND
VCC
30k
1
2
VCC
11 RB
21 CB 4.5V 30k —
23 LB
GND
VCC
30k
1
2
VCC
13 SRV
14 SLV
18 SCV
— 30k —
GND
30k
DAC
BH3866AS
Function
Integration pins that prevent
shock sound when switching
the bass and treble levels.
Treble filter pins for the left,
right, and center channels.
Bass filter pins for the left,
right, and center channels.
Integration pins that prevent
shock sound when switching
the volume levels on the left,
right, and center channels.
5

5 Page





BH3866AS arduino
Video ICs
Measurement circuit
10k
47k
100µ 2
50k 0.022µ
50
J Rg: 50
1 S1
0.039µ
V
VCC
I
A
0.33µ
VCC RR 100µ
10k
0.022µ
2
1µ 22µ
1 S5
2
2k
0.1µ 1 S4
0.1µ 32 31 30 29 28 27 26 25
LIN VCC CIN ADD BIN MSIN BGAIN STT
1 21 2
S7 S8
470P 0.033µ 470P 0.033µ
∗∗∗∗
24 23 22 21 20 19 18 17
LT LB CT CB LOUT COUT SCV DAC
BH3866AS
S10 2
20k
S11 2
5V
H
V
1
1
5k
0.33µ
1
S2
BH3866AS
50k 2
A
V
Rg: 50
2 S3
1
0.1µ
RIN GND AGCADJ LS1 LS2 SOUT PS Vref STB RT RB ROUT SRV SLV SCL SDA
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
VCC
18k 10µ
15k
∗∗
4.7µ
4.7k
0.1µ
0.0056µ
100µ
100k 220k
470P
∗ ∗ 0.033µ
S6
12
EF
VV
5V
2k
G
A I2C BUS
serial input
Recommended attachments
qElements marked with an asterisk
Carbon-sheathed resistors: ± 1%
Film capacitors: ± 1%
Ceramic capacitors: ± 1%
wUnless otherwise noted, the following
attachments should be used.
Carbon-sheathed resistors: ± 5%
Film capacitors: ± 20%
Fig.1
S9
21
D
V
Rg: 50
1k
2.2µ
fOUT
B
2.2µ V
10k
C
THD
BW =
400Hz ~ 30kHz
Precautions concerning wiring
qA bare ground should be used for GND.
wThe wiring pattern of the I2C BUS should be separate from that of the
analog unit, to avoid crosstalk.
eParallel positioning of the SCL and SDA lines of the I2C BUS should be
avoided wherever possible. If they are adjacent, they should be shielded.
Measurement circuit switch operation
Slave address
MSB
LSB
10000010
Parameter
Quiescent circuit current
Max. output voltage, Rch
Max. output voltage, Lch
Max. output voltage, Cch
Voltage gain, Rch
Voltage gain, Lch
Voltage gain, Cch
Symbol
IQ
123
1—1
I2C BUS
SW NO.
Selected address / data
4 5 6 7 8 9 10 11 0 0 0 1 0 2 0 3 0 4 0 5
1 1 1 1 1—1—F F F F F F 2 0 2 0 0 0
Measurement
point
06
0C I
VOMR 1 1 2 1 1 2 1 1 1 1 — 0 0 F F 0 0 2 0 2 0 0 0 0 C B
VOML 1 1 1 2 1 1 2 1 1 1 — F F 0 0 0 0 2 0 2 0 0 0 0 C B
VOMC 1 1 1 1 2 1 1 2 1 1 — 0 0 0 0 F F 2 0 2 0 0 0 0 C B
GVR 1 1 2 1 1 2 1 1 1 1 — 0 0 F F 0 0 2 0 2 0 0 0 0 C B
GVL 1 1 1 2 1 1 2 1 1 1 — F F 0 0 0 0 2 0 2 0 0 0 0 C B
GVC 1 1 1 1 2 1 1 2 1 1 — 0 0 0 0 F F 2 0 2 0 0 0 0 C B
11

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