SM5866AS
D/A Converter for DSD and PCM
OVERVIEW
The SM5866AS is a D/A converter compatible with
both the DSD SACD signal format and the PCM
CD/DVD-Audio and similar formats. DSD employs
a 1-bit data stream, from a high-order
∆Σ
conversion
at 64fs (fs = 44.1kHz), that contains high-level quan-
tization noise in the high-frequency band above
20kHz. The SM5866AS, in DSD reproduction, has a
DSD-dedicated FIR digital filter that attenuates the
DSD quantization noise in the digital domain, and
the resulting multi-level signal is D/A converted. In
PCM reproduction, an oversampled PCM signal
input, provided using a SM5847AF or similar digital
filter, is converted to a multi-level signal by the 3rd-
order noise shaper and then the multi-level signal is
D/A converted.
FEATURES
I
I
PINOUT
(Top view)
I
I
I
I
I
I
I
I
I
Mono-channel multi-level D/A converter
High performance analog characteristics
• DSD mode (typical values)
- THD + N: –109dB (0.00036%)
- D.R: 115dB
• PCM mode (typical values)
- THD+N: –106dB (0.00050%)
- D.R: 112dB
2 selectable DSD digital filters
PCM input mode
• 24-bit, MSB-first, right-justified
• 8-times or 4-times oversampling of fs = 16k to
192kHz
System clock (CKI)
Maximum operating frequency: f
CKI
(max)
• 37.0MHz (note 1)
• 45.4MHz (note 2)
DSD mode fs = f
CKI
/512
• typ. fs = 44.1kHz
• max. fs = 52.7kHz (note 1)
• max. fs = 88.7kHz (note 2)
PCM mode system clock
• 192/256/384/512/768fs
Operating voltage: 4.5 to 5.5V
Operating temperature: –40 to 85
°
C
Package: 28-pin SOP
Molybdenum-gate CMOS process
TSTN
TO
DVDD
SDI
SBCKA
SBCKD
RSTN
DI
BCKI
WCKI
DVSS
BCPOL
DSPOL
CVDD
1
28
IMD1
IMD0
AVSSA
RA
IOUTA
IOUTAN
AVDDA
AVDDB
RB
IOUTB
IOUTBN
AVSSB
CVSS
14
15
CKI
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.60g
+0
0.15
−
0 .1
.05
7.5 ± 0.2
Device
SM5866AS
Package
28-pin SOP
2.2 ± 0.1
1.27
0.4 ± 0.1
0.10
0.12
M
NIPPON PRECISION CIRCUITS INC.—1
0.05 ± 0.05
ORDERING INFORMATION
1.095TYP
18.7 ± 0.3
0 to 10
0.5 ± 0.2
(note 1) Under the operating conditions 1: 4.5 to 5.5V, –40 to 85
°
C
(note 2) Under the operating conditions 2: 4.75 to 5.25V, –40 to 70
°
C
9.9 ± 0.3
SM5866AS
BLOCK DIAGRAM
WCKI
10
DVDD
3
BCKI
9
DI
8
SBCKD SBCKA
6
5
SDI
4
12
BCPOL
DSPOL
DVSS
11
PCM input interface
DSD input interface
13
7
RSTN
TO
TSTN
Interpolation
2
1
CVDD
CKI
CVSS
14
Noise shaper
15
DSD filter
28
IMD1
IMD0
16
27
AVSSB
17
26
23 level
DEM DAC
23 level
DEM DAC
23 level
DEM DAC
23 level
DEM DAC
AVSSA
18
IOUTBN
19
IOUTB
20
RB
21
AVDDB
22
AVDDA
23
IOUTAN
24
IOUTA
25
RA
NIPPON PRECISION CIRCUITS INC.—2
SM5866AS
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Name
TSTN
TO
DVDD
SDI
SBCKA
SBCKD
RSTN
DI
BCKI
WCKI
DVSS
BCPOL
DSPOL
CVDD
CKI
CVSS
AVSSB
IOUTBN
IOUTB
RB
AVDDB
AVDDA
IOUTAN
IOUTA
RA
AVSSA
IMD0
IMD1
I/O
1
Ip
O
–
Ip
Ip
Ip
Ip
Ip
Ip
Ip
–
Ip
Ip
–
I
–
–
O
O
I
–
–
O
O
I
–
Ip
Ip
Description
Test mode use only (tie HIGH or leave open for normal operation)
Test mode use only (leave open for normal operation)
Digital supply VDD
DSD data input
DSD bit clock input
DSD bit clock input (tie LOW for DSD normal input mode)
System reset (active LOW)
PCM data input
PCM bit clock input
PCM word clock input
Digital ground VSS
DSD mode bit clock polarity select
DSD mode data polarity select
System clock supply VDD
System clock
System clock ground VSS
B-channel analog ground VSS
B-channel analog output (inverse-phase)
B-channel analog output (in-phase)
B-channel built-in resistor connection
B-channel analog supply VDD
A-channel analog supply VDD
A-channel analog output (inverse-phase)
A-channel analog output (in-phase)
A-channel built-in resistor connection
A-channel analog ground VSS
Input mode select
Input mode select
1. Ip = input pin with built-in pull-up resistor
NIPPON PRECISION CIRCUITS INC.—3
SM5866AS
SPECIFICATIONS
Absolute Maximum Ratings
DVSS = CVSS = AVSSA = AVSSB = 0 V, DVDD = CVDD = AVDDA = AVDDB
Parameter
Supply voltage range
Input voltage range
1
Storage temperature range
Power dissipation
Symbol
DVDD, CVDD, AVDDA, AVDDB
V
IN1
T
STG
P
D
Rating
−
0.3 to 7.0
DVSS
−
0.3 to DVDD
+
0.3
−
55 to 125
250
Unit
V
V
°
C
mW
1. Pins TSTN, SDI, SBCKA, SBCKD, RSTN, DI, BCKI, WCKI, BCPOL, DSPOL, IMD0, IMD1.
Note: Rating applies at power-ON and power-OFF.
Recommended Operating Conditions
DVSS = CVSS = AVSSA = AVSSB = 0 V, DVDD = CVDD = AVDDA = AVDDB
Parameter
Supply voltage range
Symbol
DVDD, CVDD, AVDDA, AVDDB
DVDD – CVDD, DVDD – AVDDA,
DVDD – AVDDB, CVDD – AVDDA,
CVDD – AVDDB, AVDDA – AVDDB,
DVSS – CVSS, DVSS – AVSSA,
DVSS – AVSSB, CVSS – AVSSA,
CVSS – AVSSB, AVSSA – AVSSB
T
OPR
Rating
4.5 to 5.5
Unit
V
Supply voltage differential
±0.1
V
Operating temperature range
−
40 to 85
°
C
Note: DVDD, CVDD, AVDDA, AVDDB are connected on the LSI substrate, and so the same potential should be applied to these inputs.
DC Electrical Characteristics
Recommended operating conditions apply unless otherwise noted.
Rating
Parameter
DVDD, CVDD, AVDDA, AVDDB
current consumption
1
CKI HIGH-level input voltage
CKI LOW-level input voltage
CKI input voltage
HIGH-level input voltage
2
LOW-level input voltage
2
HIGH-level output voltage
3
LOW-level output voltage
3
CKI HIGH-level input current
CKI LOW-level input current
LOW-level input current
2
HIGH-level input leakage current
2
Symbol
Condition
min
I
DD
V
IHC
V
ILC
V
INAC
V
IH
V
IL
V
OH
V
OL
I
IHC
I
ILC
I
IL1
I
IH1
I
OH
=
−
1 mA
I
OL
= 1 mA
V
IN
= DVDD
V
IN
= 0 V
V
IN
= 0 V
V
IN
= DVDD
AC coupling
f
CKI
= 22.5792 MHz
f
CKI
= 45.1584 MHz
–
–
0.7
×
DVDD
–
1.0
2.4
–
DVDD
−
0.4
–
20
20
–
–
typ
13
25
–
–
–
–
–
–
–
60
60
9
–
max
18
32
–
0.3
×
DVDD
–
–
0.5
–
0.4
120
120
18
1.0
mA
mA
V
V
Vp-p
V
V
V
V
µA
µA
µA
µA
Unit
1. all outputs have no load. Input data is an NPC test pattern.
2. Pins TSTN, SDI, SBCKA, SBCKD, RSTN, DI, BCKI, WCKI, BCPOL, DSPOL, IMD0, IMD1.
3. Pin TO.
NIPPON PRECISION CIRCUITS INC.—4
SM5866AS
Switching Characteristics
System clock (CKI)
Operating conditions 1: V
DD
= 4.5 to 5.5V, T
OPR
= –40 to 85
°
C
Rating
Parameter
HIGH-level clock pulsewidth
LOW-level clock pulsewidth
Clock pulse cycle
Symbol
min
t
CWH
t
CWL
t
CKI
7
7
27
typ
–
–
–
max
100
100
200
ns
ns
ns
Unit
Operating conditions 2: V
DD
= 4.75 to 5.25V, T
OPR
= –40 to 70
°
C
Rating
Parameter
HIGH-level clock pulsewidth
LOW-level clock pulsewidth
Clock pulse cycle
Symbol
min
t
CWH
t
CWL
t
CKI
7
7
22
typ
–
–
–
max
100
100
200
ns
ns
ns
Unit
t
CKI
CKI
t
CWL
t
CWH
V
IHC
0.5∗DVDD
V
ILC
Reset input (RSTN)
Rating
Parameter
Symbol
Conditions
min
At power-ON
RSTN pulsewidth (active LOW)
t
RSTN
After power-ON
1
100
typ
–
–
max
–
–
µs
ns
Unit
NIPPON PRECISION CIRCUITS INC.—5
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