Σ
DECO SM588
×
series
NIPPON PRECISION CIRCUITS INC.
Audio 3rd-order
Σ∆
D/A Converter
OVERVIEW
The
Σ
DECO SM588
×
series, fabricated using NPC’s Molybdenum-gate CMOS process, are D/A converter ICs
for digital audio, that provide all the basic converter functions in miniature 8-pin packages. They each feature
built-in 8-times oversampling digital filter,
Σ∆
jitter-compensated D/A converter, and post-analog lowpass fil-
ter converter stages required for digital audio. They can sample at up to 96kHz for 16 or 24-bit input word
length. A type with built-in deemphasis filter is also available for applications requiring deemphasis.
FEATURES
3-wire Input
I
I
2-wire Input with Deemphasis Filter
I
I
I
I
I
I
I
I
I
2-channel stereo configuration
256fs, 384fs, or 512fs system clock (applied by
product / version)
Input format
3-wire serial, MSB first, rear-packed
16 or 24-bit (applied by product / version)
8-times oversampling digital filter
• 32 dB stopband attenuation
• ±0.05 dB passband ripple
Σ∆
2-channel D/A converter
• 3rd-order noise shaper
• Oversampling operation
3rd-order post-analog lowpass filter
4.5 to 5.5 V supply voltage
8-pin SOP
Molybdenum-gate CMOS process
I
I
I
I
I
I
I
I
2-channel stereo configuration
256fs, 384fs, or 512fs system clock (applied by
product / version)
Input format
2-wire serial, MSB first, rear-packed
16 or 24-bit (applied by product / version)
Deemphasis filter (fs = 44.1 kHz sample rate)
8-times oversampling digital filter
• 32 dB stopband attenuation
• ±0.05 dB passband ripple
Σ∆
2-channel D/A converter
• 3rd-order noise shaper
• Oversampling operation
3rd-order post-analog lowpass filter
4.5 to 5.5 V supply voltage
8-pin SOP
Molybdenum-gate CMOS process
APPLICATIONS
I
Audio equipment
PINOUTS
3-wire input
DATA
BCKI
LRCI
CLK
2-wire input with built-in deemphasis filter
8
LO
VDD
VSS
DATA
DEEM
LRCI
CLK
1
1
8
LO
VDD
VSS
588
588
4
5
RO
4
5
RO
ORDERING INFORMATION
Device
SM5882AS
SM5883AS
SM5883BS
SM5885CS
NIPPON PRECISION CIRCUITS—1
8-pin SOP
Package
SM588
×
series
BLOCK DIAGRAM
LRCI
DATA
Input interface
L
R
BCKI*
CLK
Timing
control
Filter & attenuation
operation block
L
R
DEEM**
Noise shaper
operation block
9 Level
DEM DAC
9 Level
DEM DAC
9 Level
DEM DAC
9 Level
DEM DAC
+
−
−
+
LO
* : Not available for 2-wire input type
** : Not available for 3-wire input type
VSS VDD
RO
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
1.
2.
Name
DATA
BCKI
1
DEEM
2
LRCI
CLK
RO
VSS
VDD
LO
I/O
I
I
I
I
I
O
–
–
O
Serial data input
Bit clock input
Deemphasis ON/OFF control (44.1 kHz, ON when HIGH)
Sample rate (fs) clock input. Left-channel input when HIGH, and right-channel input when LOW.
External clock input
Right-channel analog output
Ground
Supply
Left-channel analog output
Description
3-wire type
2-wire type with built-in deemphasis filter
NIPPON PRECISION CIRCUITS—3
SM588
×
series
SPECIFICATIONS
Absolute Maximum Ratings
V
SS
= 0 V
Parameter
Supply voltage range
Input voltage range
1
Storage temperature range
Power dissipation
1. All inputs
Also applicable during supply switching.
Symbol
V
DD
V
IN
T
STG
P
D
Rating
−
0.3 to 7.0
V
SS
−
0.3 to V
DD
+
0.3
−
55 to 125
300
Unit
V
V
°
C
mW
Recommended Operating Conditions
V
SS
= 0 V
Parameter
Supply voltage
Operating temperature
Symbol
V
DD
T
OPR
Rating
4.5 to 5.5
−
40 to 85
Unit
V
°
C
DC Characteristics
V
DD
= 4.5 to 5.5 V, V
SS
= 0 V, Ta =
−
40 to 85
°
C
Rating
Parameter
Current consumption
1
CLK HIGH-level input voltage
CLK LOW-level input voltage
CLK AC-coupled input voltage
HIGH-level input voltage
2
LOW-level input voltage
2
CLK HIGH-level input current
CLK LOW-level input current
Input leakage current
2
1.
2.
Symbol
I
DD
V
IH1
V
IL1
V
INAC
V
IH2
V
IL2
I
IH
I
IL
I
LH
I
LL
V
IN
= V
DD
V
IN
= 0 V
V
IN
= V
DD
V
IN
= 0 V
Clock input
Clock input
Condition
min
–
0.7V
DD
–
0.7
0.5V
DD
–
20
20
–
–
typ
12.5
–
–
–
–
–
62
62
–
–
max
25.0
–
0.3V
DD
–
–
0.2V
DD
170
170
1.0
1.0
mA
V
V
V
p-p
V
V
µA
µA
µA
µA
Unit
V
DD
= 5 V, CLK clock input frequency f
CLK
= 16.9344 MHz (384fs type)/11.2896 MHz (256fs type)/22.5792MHz (512fs type), no output load.
Input data: NPC pattern.
Pins BCKI (3-wire type), DEEM (2-wire type with deemphasis filter), DATA, LRCI
NIPPON PRECISION CIRCUITS—4
SM588
×
series
AC Digital Characteristics
V
DD
= 4.5 to 5.5 V, V
SS
= 0 V, Ta =
−
40 to 85
°
C
System clock (CLK)
256fs type
Rating
Parameter
HIGH-level clock pulsewidth
LOW-level clock pulsewidth
Clock pulse cycle
Symbol
min
t
CWH
t
CWL
t
XI
20.0
20.0
40.0
typ
–
–
–
max
125
125
250
ns
ns
ns
Unit
384fs type
Rating
Parameter
HIGH-level clock pulsewidth
LOW-level clock pulsewidth
Clock pulse cycle
Symbol
min
t
CWH
t
CWL
t
XI
13.15
13.15
26.3
typ
–
–
–
max
125
125
250
ns
ns
ns
Unit
512fs type
Rating
Parameter
HIGH-level clock pulsewidth
LOW-level clock pulsewidth
Clock pulse cycle
Symbol
min
t
CWH
t
CWL
t
XI
10
10
20
typ
–
–
–
max
125
125
250
ns
ns
ns
Unit
CLK
t
CWL
t
XI
t
CWH
V
IH1
0.5V
DD
V
IL1
NIPPON PRECISION CIRCUITS—5
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