ROHM BH3810FS

Multimedia ICs
Vocal fader IC with input selector
BH3810FS
The BH3810FS is a vocal fader IC that is serial control compatible. It has mode switching that also includes a voice
multiplexing mode, a five-input selector, a gain selector and other such features, which can all be controlled serially.
Eight open-collector terminals and two tri-state terminals are provided on the chip to facilitate control by other ICs.
Applications
•Component
stereo systems, CD radio cassette players, TVs and car stereos.
•1)Features
Built-in low-pass filter can perform vocal fader func-
4) Five-channel input selector.
5) Mic. mixing amplifier with mute function. Key controller input also provided.
6) SSOP-A32 pin package.
tion (erasing of vocals from commercially available
music software) using just one chip.
2) Serial control can be used to switch between vocal
fader, through, multiplex, and mute modes.
3) Built-in gain selector allows selection of gain from
6dB to 20dB in 2dB steps.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Applied voltages
+ 5.5
VEE
– 4.5
Unit
V
Pd
850∗
mW
Operating temperature
Topr
– 40 ~ + 85
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
Maximum open collector voltage
VOP
Power dissipation
∗
Limits
VDD
14
V
Reduced by 8.5mW for each increase in Ta of 1°C over 25°C ,
when mounted on a 50mm × 50mm × 1.6mm board.
•Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol
Limits
Unit
VDD
4.0 ~ 5.3
V
VEE
– 4.3 ~ – 3.0
V
1
1
2
3
4
5
INPUT—LA
—LB
—LC
—LD
—LE
—RA 32
—RB 31
—RC 30
—RD 29
INPUT—RE 28
50k 50k 50k 50k 50k 50k
50k 50k 50k 50k 50k 50k
6dB (0dB)
8dB (2dB)
10dB (4dB)
12dB (6dB)
14dB (8dB)
16dB (10dB)
18dB (12dB)
20dB (14dB)
20dB (14dB)
18dB (12dB)
16dB (10dB)
14dB (8dB)
12dB (6dB)
10dB (4dB)
8dB (2dB)
6dB (0dB)
20k
7k
PORT9 ~ 10
VDD
PORT1 ~ 8
8
VEE
–
+
VDD
DIGITAL CONTROL
OUTPUT—L
7k
50k
7
50k
15k
MIC—IN
50k
10k
6
30k
30k
10k
VF
L
7k
7k
25
LPF
20k
10k
R
OUTPUT—R
TK FK
–
+
2
27 26
9
VEE
10 AGND
11 VDD
12 DGND
13 SI
14 SCK
15 PORT10
16 PORT9
17 PORT8
18 PORT7
19 PORT6
20 PORT5
21 PORT4
22 PORT3
23 PORT2
24 PORT1
Multimedia ICs
BH3810FS
•Block diagram
Multimedia ICs
BH3810FS
otherwise notes, Ta = 25°C, V = 5V, V
•Electrical characteristics (unless
Rg = 600Ω, V = 150mV, and R = 100kΩ)
DD
IN
Parameter
Quiescent current
= – 4V, G = 14dB, f =1kHz,
EE
L
Symbol
Min.
Typ.
Max.
Unit
IQ1 +
—
4.5
10.0
mA
Through mode VDD current
Conditions
IQ1 –
—
4.1
10.0
mA
Through mode VEE current
IQ2 +
—
10.0
20.0
mA
Through mode D9 to D16 data1
IQ2 –
—
7.6
20.0
mA
Through mode D9 to D16 data1
Maximum output voltage
Vom
1.5
2.2
—
Vrms
THD = 1%, through mode
L, R gain
GVT
11
14
17
dB
Through mode
Low-frequency gain
GVF
8
11
14
dB
Vocal fader mode, f = 100Hz
Microphone gain
GVM
5
8
11
dB
Crosstalk
CT
54
64
—
dB
f = 1kHz, through mode
Mute attenuation
MU
60
80
—
dB
f = 1kHz, mute mode or input mute
Vocal suppression ratio
SV
15
20
—
dB
Vocal fader mode, f = 1kHz
THD
—
0.004
0.05
%
VO = 1Vrms, through mode, BW 400Hz
to 30kHz
VN
—
15
22
µVrms
∆DCB
—
0
18
mV
Between each mode with key controller on
Input impedance
RIN
35
50
65
kΩ
Pins 1 to 5, pins 26, pins 28 to 32
Input selector crosstalk
CTIN
80
—
—
dB
f = 1kHz
Port output current
IPMax.
5.0
12
—
mA
Pins 17 to 24, 0.5V between PORT
terminal and GND voltage = 0.5V
"L" output voltage
VOL
—
0.15
0.5
V
"H" output leakage current
IOH
—
0
2.0
µA
Pins 17 to 24, 13V applied to collector
Tri-state "H" output voltage
VSOH
4.5
4.85
—
V
Pins 15 to 16, Io = 1mA
Tri-state "L" output voltage
VSOL
—
0.05
0.5
V
Pins 15 to 16, Io = 1mA
ISI
—
0.4
10
µA
When SI pin is at DGND potential
ISCK
—
0.2
10
µA
When SCK pin is at DGND potential
Total harmonic distortion
Noise level
Mode switch output DC
differential
SI pin source current (pin 13)
SCK pin source current (pin 14)
—
Rg = 0, DIN AUDIO
∗
Pins 17 to 27, IOL = 5mA
∗ Measured using a Matsushita VP-9690A (average value detector, effective value display) DIN AUDIO filter.
Operating specifications: same phase for the input and output signals.
䊊 Not designed for radiation resistance.
3
4
Rg = 600Ω
V
50k
V
1
2
S2
1
2 1
S3
S8
2 1
2 1
S4
S9
2 1
2 1
S5
S10
2 1
2 1
S6
S11
2 1
S14
2
1
A
V
A
V
2 1
V
2 1
A
2 1
A
2 1
A
2
1
2 1
S7
-LB
-LA
INPUT
2
S13
3
-LC
4
-LD
5
-LE
-RA -RB -RC -RD -RE
INPUT
1
7
-IN
8
-L
1
2
3
4
SI
5
7
8
10
9
1
10k
10k
2
S0
A
A
1
2
S21
A
1mA
1mA
2
S22
2 1
A
1
PORT PORT
SCK
6
10 11 12 13 14 15 16
2
S1
A
9
VEE AGND VDD DGND
MIC OUTPUT
-R
FK OUTPUT PORT PORT PORT PORT PORT PORT PORT PORT
0.1µF
6
LPF
TK
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
S12
2 1
DATA
Fig. 1
LATCH
2
1
VDD
2 1
V
V
A
2
S16
S18
1
V
A
2 1
1
2
V
2
S17
V
V
V
1
1
13V
S19
2
2
S20
RL
100k
V
V
THD
•Measurement circuit
CLOCK
1
Multimedia ICs
BH3810FS
Multimedia ICs
BH3810FS
operation
•(1)Circuit
About the data format
Data format
MSB
Data
24 bits total
LSB
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23
Description
Bit number
Input
selector
Input
selector
Mode
selector
3bit
3bit
3bit
17pin 18pin 19pin 20pin 21pin 22pin 23pin 24pin
15pin
16pin
Open collector port
Tri-state
port
Tri-state
port
8bit
2bit
2bit
Mic.
mute
Chip
select
1bit
2bit
Fig.2
• Address is "00"
D22
D23
0
0
At power on
Output port: current attraction OFF
Tri-state port: Low
Gain selector
6dB
Mode selector
Through mode
Mic
Mute OFF
Key controller
OFF
Input selector
LA, RA
Output port: open collector
Data
D16
D15
D14
D13
D12
D11
D10
D9
Pin
name
PORT
1
(24pin)
PORT
2
(23pin)
PORT
3
(22pin)
PORT
4
(21pin)
PORT
5
(20pin)
PORT
6
(19pin)
PORT
7
(18pin)
PORT
8
(17pin)
0
Current sink OFF
1
Current sink ON
Tri-state
PORT9 (16pin)
PORT10 (15pin)
D19
D20
D17
D18
0
0
LOW
Mode
0
0
LOW
0
1
OPEN
0
1
OPEN
1
0
OPEN
1
0
OPEN
1
1
HI
1
1
HI
D19, D20
Mode
D17, D18
Mic. mute
D21
Mode
0
Mic. ON
1
Mic. MUTE
5
Multimedia ICs
BH3810FS
Input selector 〈3 bits〉 D0 to D2
D1
D2
0
0
0
MUTE
0
0
1
MUTE
0
1
0
MUTE
0
1
1
INPUT—LA, INPUT—RA
1
0
0
INPUT—LB, INPUT—RB
1
0
1
INPUT—LC, INPUT—RC
1
1
0
INPUT—LD, INPUT—RD
1
1
1
INPUT—LE, INPUT—RE
D0
Mode
Gain selector 〈3 bits〉 D3 to D5
D3
D4
D5
Gain select
0
0
0
6dB
0
0
1
8dB
0
1
0
10dB
0
1
1
12dB
1
0
0
14dB
1
0
1
16dB
1
1
0
18dB
1
1
1
20dB
The gain is the total gain from input to output.
Mode selector 〈3 bits〉 D6 to D8
6
D6
D7
D8
LOUT
ROUT
TK
Mode
0
0
0
MUTE
MUTE
MUTE
0
0
1
VOCALFADE
VOCALFADE
VOCALFADE
0
1
0
L
L
L
L channel
0
1
1
L
R
L
Through
1
0
0
FK
FK
L+R
1
0
1
FK
FK
R
Key controller, R channel
1
1
0
FK
FK
L
Key controller, L channel
1
1
1
FK
FK
VOCALFADE
Key controller, vocal fader
Mute
Vocal fader
Key controller, L + R
Multimedia ICs
BH3810FS
(2) Timing chart
Serial data timing (timing for the IC terminals)
90%
tw
SCK
(clock signal)
tw
10%
tsu
th
ts
tw (LATCH)
90%
tw (DATA)
SI
(DATA signal,
LATCH signal)
90%
D22
D23
10%
10%
∗ When LATCH is "H", the DATA signal is forced "L" internally.
∗ The read decision for the DATA signal (SI) is made by the signal when the CLOCK signal rises.
∗ The read decision for the LATCH signal (SI) is made by the signal when the LATCH signal itself rises.
∗ A "L" must follow at the end of each signal to wait for the next signal.
Fig.3
•Timing chart constants (Ta = 25°C, V
DD
Parameter
= 5V and VEE = – 4V)
Symbol
Min.
Typ.
Max.
Unit
H input voltage
VIH
4.0
5.0
6.0
V
M input voltage
VIM
2.0
2.5
3.0
V
L input voltage
VIL
– 0.3
0
1.0
V
Minimum clock width
tw
2.0
—
—
µs
Minimum data width
tw (DATA)
4.0
—
—
µs
Minimum latch width
tw (LATCH)
2.0
—
—
µs
Setup time (DATA to CLK)
tsu
1.0
—
—
µs
Hold time (CLK to DATA)
th
1.0
—
—
µs
Setup time (DATA, CLK to LATCH)
ts
1.0
—
—
µs
∗ If the voltage between VDD and DGND changes, the values above will change.
7
8
Fig. 4
AUX
TAPE
TUNER
CD
MD
32
2
1
MICROPHONE
-LB
-RB
31
-LA
INPUT
-RA
INPUT
3
-LC
-RC
30
4
-LD
-RD
29
5
-LE
-RE
28
25
24
23
22
21
10k
20
10k
19
10k
18
10k
17
10k
7
6
0.1µF
-IN
LPF
8
-L
MIC OUTPUT
-R
2
3
4
9
VEE
10
VDD
10k
10k
12
13
SI
5
14
SCK
6
µ—con
8
15
10
16
9
PORT PORT
7
GND DATA LATCH CLOCK
11
VEE AGND VDD DGND
1
26
10k
FK OUTPUT PORT PORT PORT PORT PORT PORT PORT PORT
10k
27
10k
TK
key—con
POWER
AMP
Multimedia ICs
BH3810FS
•Application circuit
+
Multimedia ICs
BH3810FS
notes
•(1)Operation
We guarantee the application circuit design, but recommend that you thoroughly check its characteristics in actual use.
If you change any of the external component values, check both the static and transient characteristics of the circuit,
and allow sufficient margin in your selections to take into account variations in the components and ICs.
Note that Rohm has not fully investigated patent rights regarding this product.
(2) The vocal fader function
The effect of the vocal fader is realized by negating the same-phase components. In the bass region, the first-stage
low-pass filter leaves the source sound as is, even for the same-phase components. Therefore, depending on the
music, the effect may be small.
(3) The low-pass filter that leaves the vocal fader bass
The low-pass filter is formed by connecting a capacitor to pin 6. A 20kΩ resistor (design value) and this capacitor set
the cutoff frequency.
1
(Hz)
fc =
2πCR
The optional attenuation of the first-stage low-pass filter frequency is:
1
1 + (2πfCR) 2
A (f) = 20 log
f: frequency
C: external capacitor
R: 20kΩ (design value)
(dB)
(4) AGND (pin 10) and DGND (pin 12)
AGND is the ground for the IC's internal analog circuits, and DGND is the ground for the internal ports 1 to 10.
Connect the two grounds externally.
(5) Switching noise
If you are troubled by switching noise that occurs when the input selector, gain selector, or mode selector are
switched, use muting, or some other appropriate countermeasure.
(6) Serial control
The LATCH and DATA serial signals are received on the same terminal, and the signals are differentiated by voltage
level. A diode and resistor are connected to perform a conversion to logic voltage (0 to 5V). The threshold values
will change depending on the external components, so select them carefully.
If the signals are not being received very well, connect a capacitor of about 100pF between the SI terminal (pin 13),
and the DGND terminal (pin 12).
•External dimensions (Units: mm)
17
1
16
5.4 ± 0.2
32
0.8
0.36 ± 0.1
0.15 ± 0.1
1.8 ± 0.1
0.11
7.8 ± 0.3
13.6 ± 0.2
0.3Min.
0.15
SSOP-A32
9