SM6452AM/BM
NIPPON PRECISION CIRCUITS INC.
Audio Variable Volume ICs
OVERVIEW
The SM6452AM/BM are serial-control electronic variable volume ICs for audio applications. They provide
electronic volume control for 6 channels, with independent channel gain, attenuation and muting. They feature
enhanced digital zip noise suppression. The serial control options are 3-wire interface (SM6452AM) and I
2
C
bus (SM6452BM). The SM6452AM/BM are available in 24-pin SSOP packages.
FEATURES
s
PINOUT
ina
AVDD1
VREF1
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
1
s
s
s
s
s
lim
P ackag e
24-pin SSOP
24-pin SSOP
s
s
6-channel input/output (positive-phase-sequence
output)
Attenuation function
• 6-channel independent control
• +16 to 0 to
−
79dB variable range
• 1.0 dB/step adjustment
• Mute function
Microcontroller interface
• 3-wire serial data interface (SM6452AM)
• I
2
C bus format 2-wire control (SM6452BM)
*1
• I
2
C address = 1000000
Low noise
•
≤
0.002% THD + noise
•
≤
10µVrms residual noise
0.5AV
DD
analog reference voltage source built-in
Power supply
• 7 to 13V analog supply
• 2.7 to 5.5V digital supply
Molybdenum-gate CMOS process
24-pin SSOP
SM6452AM
ORDERING INFORMATION
D e vice
SM6452BM
Top view
SM6452AM
SM6452BM
pre
*1.
I
2
C
bus is a registered trademark of Philips
Electronics N.V.
ry
Top view
24
AVDD2
VREF2
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AOUT6
AVSS2
DVSS
MCK
S M 6 4 5 2 AM
AVSS1
MDT
RSTN
DVDD
12
13
MLEN
AVDD1
VREF1
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AVSS1
DVDD
SDA
RSTN
1
24
AVDD2
VREF2
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AOUT6
AVSS2
DVSS
SCL
S M 6 4 5 2 BM
12
13
NC
NIPPON PRECISION CIRCUITS—1
SM6452AM/BM
PACKAGE DIMENSIONS
Unit: mm
10.05 0.20
10.20 0.30
0.10 0.10
+0.20
1.90
−0.10
0.8
0.36 0.10
0.10
lim
AVDD1
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
ATT
Control
ATT
Control
ATT
Control
ATT
Control
ATT
Control
ATT
Control
Gain/ATT Decoder
VREF1
Interface Control
AVSS1
DVDD
RSTN
MDT(AM)/SDA(BM)
MCK(AM)/SCL(BM)
MLEN(AM)/NC(BM)
BLOCK DIAGRAM
pre
ina
ry
5.40 0.20
7.80 0.30
0.15
−
0.05
+
0.1
1.80
0.12
M
0.50 0.20
0 10
AVDD2
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AOUT6
VREF2
AVSS2
DVSS
NIPPON PRECISION CIRCUITS—2
SM6452AM/BM
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
S D A (BM)
12
13
NC (BM)
MCK (AM)
14
SCL (BM)
15
16
17
18
19
20
21
22
23
24
DV S S
I
–
–
I
RSTN
MLEN (AM)
I/O
Ip
Ip
Name
AV D D 1
VREF1
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AV S S 1
DV D D
MDT (AM)
I/O
1
–
O
I
I
I
I
I
I
–
–
I
A/D
2
A
A
A
A
A
A
A
A
Analog supply 1
Reference voltage source capacitor connection (0.5AV D D 1 )
Channel 1 audio input
Channel 2 audio input
Channel 3 audio input
Channel 4 audio input
Channel 5 audio input
Channel 6 audio input
Description
pre
1. Ip = input pin with pull-up
2. A = analog, D= digital
NIPPON PRECISION CIRCUITS—3
lim
AV S S 2
–
A
AOUT6
AOUT5
AOUT4
AOUT3
AOUT2
AOUT1
VREF2
O
O
O
O
O
O
O
–
A
A
A
A
A
A
A
AV D D 2
A
ina
ry
A
Analog ground 1
Digital supply
D
D
Microcontroller data input
D
I
2
C bus serial data input and acknowledge (ACK) signal output
D
System reset input (active LOW -level)
Microcontroller latch enable input
D
–
No connection
D
Microcontroller clock input
I
2
C bus clock input
D
D
Digital ground
Analog ground 2
Channel 6 audio output
Channel 5 audio output
Channel 4 audio output
Channel 3 audio output
Channel 2 audio output
Channel 1 audio output
Reference voltage source capacitor connection (0.5AV D D 2 )
Analog supply 2
SM6452AM/BM
SPECIFICATIONS
Absolute Maximum Ratings
AVSS1 = AVSS2 = DVSS = 0V, AVDD1 = AVDD2 = AV
DD
, DVDD = DV
DD
P arameter
Analog supply voltage
Digital supply voltage
Analog input voltage
Digital input voltage
I
2
C bus signal input voltage (SDA, SCL)
Storage temperature range
Pow er dissipation
1. Ratings also apply at supply switch ON and OFF.
Symbol
AV
D D
Rating
1
−0.3
to 15.0
−0.3
to 7.0
Unit
V
V
V
Recommended Operating Conditions
AVSS1 = AVSS2 = DVSS = 0V
P arameter
Analog supply voltage
Digital supply voltage
Supply voltage deviation
Operating temperature
lim
T
opr
AV
D D 1
−
AV
D D 2
, AV
S S 1
−
AV
S S 2
,
AV
S S 1
−
DV
S S
, AV
S S 2
−
DV
S S
pre
NIPPON PRECISION CIRCUITS—4
ina
ry
DV
D D
V
INA
V
S S
−
0.3 to AV
D D
+ 0.3
V
IND
V
S S
−
0.3 to DV
D D
+ 0.3
10
V
IOPEN
T
stg
P
D
−55
to 125
TBD
Symbol
AV
D D
Rating
7.0 to 13.0
2.7 to 5.5
±0.1
−40
to 85
DV
D D
V
V
°C
mW
Unit
V
V
V
°C
SM6452AM/BM
DC Characteristics (SM6452AM)
AV
DD
= 7 to 13V, DV
DD
= 2.7 to 5.5V, V
SS
= 0V, T
a
=
−40
to 85°C
Rating
P arameter
Symbol
Condition
min
I
D D D 1
I
D D D 2
AVDD1, AVDD2 current consumption
M D T, MCK, MLEN, RSTN HIGH-level
input voltage
M D T, MCK, MLEN, RSTN LOW -level
input voltage
RSTN, MLEN input current
M D T, MCK input leakage current
RSTN, MLEN input leakage current
I
D D A
V
IH
V
IL
I
IL1
I
L L 1
I
L H 1
I
L H 2
Data transfer stopped, MDT = MCK =
M L E N = R S T N = DV
D D
= 5V
Data transfer in progress, DV
D D
= 5V
–
typ
TBD
max
TBD
µA
Unit
DVDD current consumption
ina
ry
–
TBD
TBD
–
TBD
–
TBD
–
0.7DV
D D
–
–
0.3DV
D D
TBD
V
IN
= 0V
V
IN
= 0V
–
TBD
–
–
TBD
V
IN
= DV
D D
V
IN
= DV
D D
–
–
–
–
TBD
TBD
Rating
typ
TBD
TBD
TBD
–
–
TBD
TBD
–
–
–
–
Condition
min
–
–
–
0.7DV
D D
–
–
–
–
–
–
TBD
max
TBD
TBD
TBD
–
0.3DV
D D
TBD
TBD
TBD
TBD
TBD
TBD
Data transfer stopped,
S D A = SCL = RSTN = DV
D D
Data transfer in progress
V
IN
= 0V
V
IN
= 0V
V
IN
= DV
D D
V
IN
= DV
D D
V
IN
= 10V
A CK signal output, 3mA input current
mA
mA
V
V
µA
µA
µA
µA
DC Characteristics (SM6452BM)
AV
DD
= 7 to 13V, DV
DD
= 2.7 to 5.5V, V
SS
= 0V, T
a
=
−40
to 85°C
P arameter
Symbol
lim
I
D D D 1
I
D D D 2
I
D D A
V
IH
V
IL
I
IL1
I
IL2
I
L H 1
I
L H 2
I
L H 3
V
OL
Unit
µA
mA
mA
V
V
µA
µA
µA
µA
µA
V
DVDD current consumption
AVDD1, AVDD2 current consumption
S D A, SCL, RSTN HIGH-level input
voltage
S D A, SCL, RSTN LOW -level input
voltage
RSTN input current
pre
RSTN input leakage current
S D A, SCL input leakage current
S D A L OW -level output voltage
S D A, SCL input current
NIPPON PRECISION CIRCUITS—5
嵌入式系统
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