ROHM BH7760KV

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
•1)Features
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)
Parameter
Symbol
VCC
Applied voltage
Limits
Unit
+ 7.0
V
Pd
900∗
Operating temperature
Topr
– 10 ~ + 70
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
Power dissipation
mW
∗ 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.
•Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage (analog system)
Power supply voltage (for SP)
Power supply voltage (digital system)
Symbol
Limits
Unit
AVcc
+ 4.0 ~ + 6.0
V
SPVcc
+ 4.0 ~ + 6.0
V
DVcc
+ 2.7 ~ + 3.3
V
䊊 Not designed for radiation resistance.
1
Multimedia ICs
BH7760KV
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
•Block diagram
36
35
34
33
32
31
30
29
28
27
26
25
A
INT
EXT
FADER
INT
INT MIC IN L
WIND
CUT
37
24
ALC FILTER
23
REC NFB L
22
REC NFB R
21
REC OUT L
20
REC OUT R
LPF
19
PB IN L
LPF
18
PB IN R
17
DVCC
16
DGND
15
DATA IN
14
CLK
13
CS
+ 21.3dB
AMP
ALC
EXT
INT MIC IN R
38
MIC SEL
39
A
EXT
EXT MIC IN L
EXT MIC IN R
40
INT
INT
WIND
CUT
+ 21.3dB
AMP
ALC
41
EXT
LINE OUT L
42
AMP
LINE OUT R
43
AMP
MUTE OUT
44
HP OUT L
+ 8.7dB
+ 8.7dB
HPAMP
45
ATT
+ 8.7dB
+
HP OUT R
SP OUT 1
HPAMP
46
SERIAL
DATA
I/F
ATT
+ 8.7dB
SPAMP
47
BIAS
AVCC
SP OUT 2
VREF
48
POWER
ON / OFF
MUTE GEN
2
1
2
3
4
5
6
7
8
9
10
11
12
SP VCC
SP ON / OFF
SP GND
BEEP IN
MIX OUT
MUTEGENC
MUTE CTRL
BIAS
VREFC
AGND1
AGND2
AVCC
SPAMP
Multimedia ICs
BH7760KV
•Pin descriptions
Pin No.
Pin name
1
SP VCC
2
SP ON / OFF
3
Function
Pin voltage
Pin type
—
Speaker VCC
5.0V
SP ON / OFF control
5.0V
SP GND
Speaker GND
0.0V
4
BEEP IN
Speaker input
2.5V
B (NPN)
5
MIX OUT
HP amplifier L / R mixer output
2.5V
EF (NPN)
6
MUTE GENC
POWER ON MUTE delay
2.5V
EF (NPN)
7
MUTE CTRL
Mute control input
—
100kΩ PULL UP
—
10kΩ
8
BIAS
Bias
2.5V
EF (NPN)
9
VREFC
VCC / 2 reference
2.5V
100kΩ
10
AGND1
Analog GND1
0.0V
—
11
AGND2
Analog GND2
0.0V
—
12
AVCC
Analog VCC
5.0V
13
CS
Serial control CS input
—
G ~ 10kΩ
14
CLK
Serial control CLK input
—
G ~ 10kΩ
15
DATAIN
Serial control DATE input
—
G ~ 10kΩ
16
DGND
Serial control GND
0.0V
Serial control VCC
3.0V
PB input
2.5V
—
—
17
DVCC
19,18
PBIN L / R
21,20
REC OUT L / R
REC output
2.5V
EF (P-P)
23,22
REC NFB L / R
ALC amplifier feedback
2.5V
B (NPN) ~ 3.9kΩ
0.0V
EF (NPN) ~ 200Ω
—
B (NPN) ~ 1kΩ
24
ALC FILTER
ALC constant setting
25
FADE DELAY
FADE delay
—
75kΩ
26
FADE CTRL
FADE control input
0.0V
B (NPN) ~ 10kΩ
32,29
WIND CIN L / R
WIND CUT FILTER input
2.5V
EF (P-P)
31,28
WIND C1 L / R
WIND CUT FILTER constant 1
2.5V
EF (NPN) ~ 8.2kΩ
30,27
WIND C2 L / R
WIND CUT FILTER constant 2
2.5V
B (NPN)
Note: EF: Emitter follower, P-P: Push-pull, B: Base, G: gate.
3
Multimedia ICs
BH7760KV
•Pin descriptions
Pin No.
Pin name
36, 34
EXT NFB L / R
MIC amplifier feedback (EXT)
2.5V
B (NPN)
INT NFB L / R
MIC amplifier feedback (INT)
2.5V
B (NPN)
2.5V
75kΩ
5.0V
200kΩ PULL UP
2.5V
75kΩ
2.5V
EF (NPN)
—
C (NPN)
35, 33
37, 38
Function
Pin voltage
INT MIC IN L / R INT MIC input
MIC SEL control input
MIC SEL
39
Pin type
40, 41
EXT MIC IN L / R EXT MIC input
42, 43
LINE OUT L / R
44
MUTE OUT
45, 46
HP OUT L / R
HP amplifier output
2.5V
EF (NPN)
47
SP OUT 1
BTL speaker output (forward side)
2.5V
EF (NPN)
48
SP OUT 2
BTL speaker output (reverse side)
2.5V
EF (NPN)
LINE amplifier output
MUTE output
Note: EF: Emitter follower, P-P: Push-pull, B: Base, G: gate.
•Electrical characteristics (unless otherwise noted, AV
Parameter
CC
= SPVCC, VCC = 5.0V, DVCC = 3.0V, Ta = 25°C)
Symbol
Min.
Typ.
Max.
Unit
Conditions
Circuit current
ICC
6.0
11.0
20.0
mA
No input
Circuit current power save
ICCS
0.8
1.6
3.2
mA
No input and during power save
[Circuit current]
[MIC amplifier] INPUT: EXT MIC IN L / R, INT MIC IN L / R
Output voltage level
ALS level
VOREC
OUTPUT: REC OUT L / R
– 21.7
– 18.7
– 15.7
dBV
VIN = – 70.0dBV, with MIC amplifier at 30dB
VORECALC – 10.7
– 6.7
– 2.7
dBV
VIN = – 50.0dBV, with MIC amplifier at 30dB
[Line amplifier (during EE)] INPUT: EXT MIC IN L / R, INT MIC IN L / R
OUTPUT: LINE OUT L / R
dBV
VIN = – 70.0dBV, with MIC amplifier at 30dB
%
VIN = – 70.0dBV, with MIC amplifier at 30dB∗1
– 10.0
– 7.0
Distortion
THDLINEEE
—
0.50
1.50
Output residual noise
VONLINEEE
—
– 60.0
– 50.0
dBV
With MIC amplifier at 30dB∗2
Crosstalk
CTLINEEE
—
– 31.0
– 20.0
dBV
VIN = – 60.0dBV, with MIC amplifier at 30dB∗1
Maximum output level
VOMLINEEE
– 3.0
2.3
dBV
THD = 3%, ∗1, with ALC OFF
Output voltage level
VOLINEEE
– 13.0
[Line amplifier (during PB)] INPUT: PB IN L / R
Output voltage level
Distortion
VOLINEPB
THDLINEPB
– 12.0
—
—
OUTPUT: LINE OUT L / R
dBV
– 8.0
0.017
0.20
%
VIN = – 18.7dBV∗1
VOLINE L / R difference
Channel balance
CBLINEPB
– 0.5
0.0
+ 0.5
dB
Output residual noise
VONLINEPB
—
– 90.0
– 73.0
dBV
∗1 B.W. = 400Hz to 30kHz
∗2 DIN AUDIO
4
VIN = – 18.7dBV
– 10.0
∗2
Multimedia ICs
BH7760KV
•Electrical characteristics (unless otherwise noted, AV
Parameter
Symbol
[HP amplifier] INPUT: PB IN L / R
Min.
CC
Typ.
= SP, VCC = 5.0V, DVCC = 3.0V, Ta = 25°C)
Max.
Unit
Conditions
OUTPUT: HP OUT L / R
dBV
VIN = – 18.7dBV
– 10.0
– 7.5
Distortion
THDHP
—
0.7
2.0
%
Maximum output level
VOMHP
– 3.0
– 1.2
—
dBV
THD = 3%∗1
Output residual noise
VONHP
—
– 91.0
– 73.0
dBV
Rg = 1kΩ∗2
Crosstalk between channels
CTHP
—
– 87.0
– 70.0
dBV
VIN = – 8.7dBV∗2
Muting level
MTHP
—
– 100.0
– 83.0
dBV
VIN = – 8.7dBV, V7 = H∗2
– 7.5
dBV
VIN = – 18.7dBV
dBV
VIN = – 10.0dBV
Output voltage level
VOHP
[MIX OUT] INPUT: PB IN L / R
Output voltage level
VIN = – 18.7dBV∗1
OUTPUT: MIX OUT
VOMIX
[SP amplifier] INPUT: BEEP IN
Output voltage level
– 12.5
– 12.5
– 10.0
OUTPUT: SP OUT 1 / 2 (BML)
VOSP
– 4.5
– 1.0
+ 2.5
VIN = – 10.0dBV∗1
Distortion
THDSP
—
0.8
2.0
%
Maximum output level
VOMSP
+ 3.0
+ 4.8
—
dBV
THD = 10%∗1
Output residual noise
VONSP
—
– 95.0
– 80.0
dBV
Rg = 1kΩ∗2
VOOFFSP
—
– 65.0
– 55.0
dBV
VIN = – 6.0dBV∗2
Low mode hold voltage
VH14L
0.0
—
0.5
V
—
High mode hold voltage
VH14H
1.8
—
DVCC
V
—
Low mode hold voltage
VH15L
0.0
—
0.5
V
—
High mode hold voltage
VH15H
1.8
—
DVCC
V
—
Low mode hold voltage
VH16L
0.0
—
0.5
V
—
High mode hold voltage
VH16H
1.8
—
DVCC
V
—
SP off hold voltage
VH3L
0.0
—
0.5
V
—
SP on hold voltage
VH3H
2.0
—
AVCC
V
—
MUTE hold voltage
VH7L
0.0
—
0.5
V
—
MUTE hold voltage
VH7H
2.0
—
AVCC
V
—
FADE off hold voltage
VH26L
0.0
—
0.5
V
—
FADE on hold voltage
VH26H
2.0
—
AVCC
V
—
EXT hold voltage
VH39L
0.0
—
0.5
V
—
INT hold voltage
VH39H
2.0
—
AVCC
V
—
SP off level
[Control mode hold voltage]
〈CS〉
〈CLK〉
〈DATA IN〉
〈SP ON / OFF〉
〈MUTE control〉
〈FADE control〉
〈MIC SEL〉
∗1 B.W. = 400Hz to 30kHz
∗2 DIN AUDIO
5
Multimedia ICs
BH7760KV
•Measurement circuit
1k
1k
1k
1k
33k
0.047µ 0.047µ
33k
FADE CTRL
BIAS
33k
0.047µ 0.047µ
10µ
+
33k
36
35
34
33
32
31
30
29
28
INT
EXT
27
26
25
A
FADER
1k
2.2M
+ 21.3dB
AMP
ALC
24
1µ
MIC SEL
38
23
A
39
EXT
22
+
1µ
40
INT
+
WIND
CUT
1k
1µ
41
20
EXT
+
22k
1µ
AMP
42
LPF
+ 8.7dB
19
+
LINE OUT R
22k
1µ
MUTE OUT
AMP
43
LPF
+ 8.7dB
44
45
+
HPAMP
+
HP OUT R
100
ATT
+ 8.7dB
47µ
SP OUT 1
46
SERIAL
DATA
I/F
ATT
+ 8.7dB
SPAMP
47
BIAS
8
VREF
48
POWER
ON / OFF
MUTE GEN
1
2
3
4
5
6
0.47µ
0.47µ
1k 15k
10µ
10
11
10µ
22k
+
MIX OUT
BEEP IN
SP GND
SP ON / OFF
SP VCC
9
+
Fig.1
6
8
100µ
BIAS
12
+
+
100µ
7
+
100µ
AGND1
SPAMP
MUTE CTRL
SP OUT 2
22k
1µ
22k
1µ
1k
1µ
1k
REC OUT R
PB IN L
PB IN R
DVCC
+
100µ
16
DGND
15
DATA IN
14
CLK
13
CS
AVCC
AVCC
47µ
AGND2
100
18
17
HPAMP
+
HP OUT L
REC OUT L
1µ
+
LINE OUT L
ALC
21
+
EXT MIC IN R
+ 21.3dB
AMP
+
1k
22µ
INT
+
EXT MIC IN L
4.7µ
22µ
EXT
+
INT MIC IN R
WIND
CUT
37
+
1k
1µ
+
INT MIC IN L
+
+
INT
Multimedia ICs
BH7760KV
•External dimensions (Units: mm)
37
24
48
13
1.4 ± 0.1
0.1
1
0.5
12
0.5
9.0 ± 0.3
7.0 ± 0.2
9.0 ± 0.3
7.0 ± 0.2
36
25
0.125 ± 0.1
0.2 ± 0.1
0.1
VQFP48C
7