ROHM BH7760KV Datasheet
1
Multimedia ICs
Analog signal I / O interface for
portable audio applications
BH7760KV
The BH7760KV contains the complete audio I / O analog block on a single-chip IC. Therefore, all necessary functions for a DVC audio analog I / O interface are provided on one chip.
•
Applications
Portable audio applications
•
Features
1) Contains the input amplifier, wind noise deletion filter, ALC, 30kHz LPF, line amplifier, stereo headphone amplifier, and BTL monaural speaker amplifier required to configure a analog signal I / O interface (audio I / O) all on one chip.
2) With the internal 3-line serial control decoder circuit,
serial control enables the setting of the various
modes for the IC.
•
Absolute maximum ratings (Ta = 25°C)
•
Recommended operating conditions (Ta = 25°C)
Parameter Symbol Limits
Unit
Applied voltage
Power dissipation
Operating temperature
Storage temperature
V
CC
Pd
Topr
Tstg
+ 7.0
– 10 ~ + 70
– 55 ~ + 125
V
mW
°C
°C
∗
Reduced by 9.0mW for each increase in Ta of 1°C over 25°C with the IC unmounted.
∗
When mounted on a 70mm × 70mm × 1.6mm glass epoxy board.
900
∗
Parameter Symbol Limits Unit
Power supply voltage (analog system)
Power supply voltage (for SP)
Power supply voltage (digital system)
AVcc
SPVcc
DVcc
+ 4.0 ~ + 6.0
+ 4.0 ~ + 6.0
+ 2.7 ~ + 3.3
V
V
V
䊊 Not designed for radiation resistance.
2
Multimedia ICs BH7760KV
•
Block diagram
36 35 34 33 32 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
12
1110987654321
48
47
46
45
44
43
42
41
40
39
38
37
+
INT
INT
EXT
INT
EXT
INT
AVCC
EXT
EXT
AMP
AMP
AMP
AMP
+ 8.7dB
HPAMP
+ 8.7dB
HPAMP
SPAMP
SPAMP
+ 8.7dB
+ 8.7dB
+ 21.3dB
+ 21.3dB
ATT
LPF
ALC
ALC
LPF
ATT
VREF
POWER
ON / OFF
MUTE GEN
SERIAL
DATA
I / F
BIAS
WIND
CUT
WIND
CUT
A
A
ALC FILTER
REC NFB L
REC NFB R
REC OUT L
REC OUT R
PB IN L
PB IN R
DV
CC
DGND
DATA IN
CLK
CS
INT MIC IN L
INT MIC IN R
MIC SEL
EXT MIC IN L
EXT MIC IN R
LINE OUT L
LINE OUT R
MUTE OUT
HP OUT L
HP OUT R
SP OUT 1
SP OUT 2
EXT NFB L
INT NFB L
EXT NFB R
INT NFB R
WINDC IN L
WINDC1 L
WINDC2 L
WINDC IN R
WINDC1 R
WINDC2 R
FADE CTRL
FADE DELAY
SP V
CC
SP ON / OFF
SP GND
BEEP IN
MIX OUT
MUTEGENC
MUTE CTRL
BIAS
VREFC
AGND1
AGND2
AV
CC
FADER
3
Multimedia ICs BH7760KV
•
Pin descriptions
Pin No. Pin name Function
Pin voltage
Pin type
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
19,18
21,20
23,22
24
25
26
32,29
31,28
30,27
SP V
CC
SP ON / OFF
SP GND
BEEP IN
MIX OUT
MUTE GENC
MUTE CTRL
BIAS
VREFC
AGND1
AGND2
AV
CC
CS
CLK
DATAIN
DGND
DV
CC
PBIN L / R
REC OUT L / R
REC NFB L / R
ALC FILTER
FADE DELAY
FADE CTRL
WIND CIN L / R
WIND C1 L / R
WIND C2 L / R
Speaker V
CC
SP ON / OFF control
Speaker GND
Speaker input
HP amplifier L / R mixer output
POWER ON MUTE delay
Mute control input
Bias
V
CC / 2 reference
Analog GND1
Analog GND2
Analog V
CC
Serial control CS input
Serial control CLK input
Serial control DATE input
Serial control GND
Serial control V
CC
PB input
REC output
ALC amplifier feedback
ALC constant setting
FADE delay
FADE control input
WIND CUT FILTER input
WIND CUT FILTER constant 1
WIND CUT FILTER constant 2
5.0V
5.0V
0.0V
2.5V
2.5V
2.5V
—
2.5V
2.5V
0.0V
0.0V
5.0V
—
—
—
0.0V
3.0V
2.5V
2.5V
2.5V
0.0V
—
0.0V
2.5V
2.5V
2.5V
—
100kΩ PULL UP
—
B (NPN)
EF (NPN)
EF (NPN)
10
k
Ω
EF (NPN)
100
k
Ω
—
—
—
G ~ 10
k
Ω
G ~ 10
k
Ω
G ~ 10
k
Ω
—
—
75
k
Ω
EF (P-P)
B (NPN) ~ 3.9kΩ
EF (NPN) ~ 200Ω
B (NPN) ~ 1kΩ
B (NPN) ~ 10kΩ
EF (P-P)
EF (NPN) ~ 8.2kΩ
B (NPN)
Note: EF: Emitter follower, P-P: Push-pull, B: Base, G: gate.
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