NPC SM6452AM, SM6452BM Datasheet
SM6452AM/BM
NIPPON PRECISION CIRCUITS INC.
Audio Variable V olume 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
bus (SM6452BM). The SM6452AM/BM are available in 24-pin SSOP packages.
FEATURES
■
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)
2
•I
C bus format 2-wire control (SM6452BM)
2
•I
C address = 1000000
■
Low noise
• ≤ 0.002% THD + noise
• ≤ 10µVrms residual noise
■
0.5AV
■
Power supply
• 7 to 13V analog supply
• 2.7 to 5.5V digital supply
■
Molybdenum-gate CMOS process
■
24-pin SSOP
analog reference voltage source built-in
DD
*1
PINOUT
SM6452AM
AVDD1
VREF1
DVDD
Top view
1
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6 AOUT6
AVSS1
MDT
RSTN
12
SM6
452 M
A
24
13
AVDD2
VREF2
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AVSS2
DVSS
MCK
MLEN
2
C
ORDERING INFORMATION
De vice Pack ag e
SM6452AM 24-pin SSOP
SM6452BM 24-pin SSOP
2
*1. I
C bus is a registered trademark of Philips
Electronics N.V.
preliminary
SM6452BM
AVDD1
VREF1
DVDD
Top view
1
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6 AOUT6
AVSS1
SDA
RSTN
12
NIPPON PRECISION CIRCUITS—1
SM6
452 M
B
24
13
AVDD2
VREF2
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AVSS2
DVSS
SCL
NC
PACKAGE DIMENSIONS
Unit: mm
10.05 0.20
10.20 0.30
SM6452AM/BM
7.80 0.30
5.40 0.20
0.15
+
−
0.1
0.05
0.8
BLOCK DIAGRAM
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
0.36 0.10
0.10
AVDD1
ATT
Control
ATT
Control
ATT
Control
ATT
Control
ATT
Control
ATT
Control
0.12
M
1.80
+0.20
−0.10
1.90
0.10 0.10
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
Gain/ATT
Control
0.50 0.20
010
AVDD2
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AOUT6
Gain/ATT Decoder
VREF1
AVSS1
DVDD
Interface Control
MDT(AM)/SDA(BM)
RSTN
MLEN(AM)/NC(BM)
MCK(AM)/SCL(BM)
DVSS
VREF2
AVSS2
preliminary
NIPPON PRECISION CIRCUITS—2
PIN DESCRIPTION
SM6452AM/BM
Number Name I/O
1 AVDD1 – A Analog supply 1
2 VREF1 O A Reference voltage source capacitor connection (0.5AVDD1)
3 AIN1 I A Channel 1 audio input
4 AIN2 I A Channel 2 audio input
5 AIN3 I A Channel 3 audio input
6 AIN4 I A Channel 4 audio input
7 AIN5 I A Channel 5 audio input
8 AIN6 I A Channel 6 audio input
9 AVSS1 – A Analog ground 1
10 DV DD – D Digital supply
MDT (AM) I D Microcontroller data input
11
SD A (BM) I/O D I
12 RSTN Ip D System reset input (active L OW-level)
MLEN (AM) Ip D Microcontroller latch enable input
13
NC (BM) – – No connection
MCK (AM) I D Microcontroller clock input
14
SCL (BM) I D I
15 D VS S – D Digital ground
16 AVSS2 – A Analog ground 2
17 AOUT6 O A Channel 6 audio output
18 AOUT5 O A Channel 5 audio output
19 AOUT4 O A Channel 4 audio output
20 AOUT3 O A Channel 3 audio output
21 AOUT2 O A Channel 2 audio output
22 AOUT1 O A Channel 1 audio output
23 VREF2 O A Reference voltage source capacitor connection (0.5AVDD2)
24 AVDD2 – A Analog supply 2
1. Ip = input pin with pull-up
2. A = analog, D= digital
1
A/D
2
2
C b us ser ial data input and ackn owledge (ACK) signal output
2
C bus clock input
Description
preliminary
NIPPON PRECISION CIRCUITS—3
−
−
−
−
−
−
SPECIFICATIONS
Absolute Maximum Ratings
−
−
−
°
−
°
SM6452AM/BM
AVSS1 = AVSS2 = DVSS = 0V, AVDD1 = AVDD2 = AV
Parameter Symbol Rating
Analog supply voltage AV
Digital supply voltage DV
Analog input voltage V
Digital input voltage V
2
I
C b us signal input voltage (SDA, SCL) V
Storage temperature range T
Po w er dissipation P
1. Ratings also apply at supply switch ON and OFF.
DD
DD
INA
IND
IOPEN
stg
D
Recommended Operating Conditions
AVSS1 = AVSS2 = DVSS = 0V
Parameter Symbol Rating Unit
Analog supply voltage AV
Digital supply voltage DV
AV
Supply voltage deviation
Operating temperature T
AV
DD1
SS1
AV
DV
DD2
SS
DD
DD
, AV
, AV
opr
SS1
SS2
, DVDD = DV
DD
AV
,
SS2
DV
SS
DD
1
0.3 to 15.0 V
0.3 to 7.0 V
V
0.3 to AV
SS
V
0.3 to DV
SS
55 to 125
7.0 to 13.0 V
2.7 to 5.5 V
+ 0.3 V
DD
+ 0.3 V
DD
10 V
TBD m W
±0.1 V
40 to 85
Unit
C
C
preliminary
NIPPON PRECISION CIRCUITS—4
DC Characteristics (SM6452AM)
AV
= 7 to 13V, DV
DD
= 2.7 to 5.5V, V
DD
SM6452AM/BM
= 0V, T
SS
= − 40 to 85 ° C
a
Parameter Symbol Condition
I
DVDD current consumption
AVDD1, AVDD2 current consumption I
MD T, MCK, MLEN, RSTN HIGH-level
input voltage
MD T, MCK, MLEN, RSTN LOW-level
input voltage
RSTN, MLEN input current I
M D T, MCK input leakage current
RSTN, MLEN input leakage current I
DDD1
I
DDD2
DDA
V
V
IL1
I
LL1
I
LH1
LH2
IH
IL
DC Characteristics (SM6452BM)
AV
= 7 to 13V, DV
DD
Parameter Symbol Condition
DVDD current consumption
AVDD1, AVDD2 current consumption I
SD A, SCL, RSTN HIGH-level input
voltage
SD A, SCL, RSTN LOW-level input
voltage
RSTN input current I
S DA, SCL input current I
RSTN input leakage current I
S DA, SCL input leakage current
S D A L OW -level output voltage V
= 2.7 to 5.5V, V
DD
I
DDD1
I
DDD2
DDA
V
V
IL1
IL2
LH1
I
LH2
I
LH3
OL
IH
IL
Rating
min typ max
Data transfer stopped, MDT = MCK =
MLEN = RSTN = DV
Data transfer in progress, DV
V
= 0V – TBD TBD µA
IN
V
= 0V – – TB D µA
IN
V
= DV
IN
DD
V
= DV
IN
DD
= 0V, T
SS
Data transfer stopped,
SD A = SCL = RSTN = DV
Data transfer in progress – TBD T B D mA
V
IN
V
IN
V
IN
V
IN
V
IN
ACK signal output, 3mA input current TB D – TBD V
= − 40 to 85 ° C
a
= 0V – TBD TBD µA
= 0V – TBD TBD µA
= DV
DD
= DV
DD
= 10V – – TB D µA
= 5V
DD
= 5V – TBD TBD mA
DD
DD
– TBD TBD µA
– TBD TBD m A
0.7DV
DD
– – 0.3DV
– – TBD µA
– – TBD µA
min typ max
– TBD TBD µA
– TBD TBD m A
0.7DV
DD
– – 0.3DV
– – TBD µA
– – TBD µA
––V
DD
Rating
––V
DD
Unit
V
Unit
V
preliminary
NIPPON PRECISION CIRCUITS—5
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