DECO SM5865CM
NIPPON PRECISION CIRCUITS--1
NIPPON PRECISION CIRCUITS INC.
D/A Converter for Digital Audio
OVERVIEW
The SM5865CM is a 24-bit input D/A converter LSI
for high-quality digital audio equipment. It com-
prises newly developed DEM (dynamic element
matching) circuits, 3rd-order
noise shaper and
31-level quantizer to realize super low total har-
monic distortion and wide dynamic range. Also, the
device is widely reduced residual quantization noise
up to high-frequency bandwidth in the audio band so
the order of the required final-stage analog lowpass
filter can be reduced, making it ideal for application
with high-frequency sampling format. The output
stage employs differential current outputs for high-
accuracy analog signals, with appropriate lowpass
filtering of the output signal. This device can be used
in combination with an 8-times oversampling digital
filter of SM5847AF and others like that for the com-
patibility with 192kHz sampling format.
FEATURES
I
Mono-channel D/A converter LSI
I
High performance
0.00030 % (110.5dB) typ. THD + N
117 dB typ. Dynamic range
120 dB typ. S/N
I
Input interface
20 or 24-bit word length
MSB first, right-justified format
8 or 4 times oversampling at fs = 16/32/44.1/48/
88.2/96/176.4/192 kHz
I
System clock frequency
192/256/384/512/768/1024 fs
I
Single 5 V operating supply voltage
I
24-pin SSOP package
I
Molybdenum-gate CMOS process
ORDERING INFORMATION
PINOUT
(Top view)
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.23g
24-pin SSOP
Device
Package
SM5865CM
24-pin SSOP
1
13
24
12
DVSS
DI
BCKI
WCKI
IWSL
RSTN
TSTN
AVSSA
RA
IOUTA
VBA
N.C.
AVDDA
AVDDB
TO
RB
DVDD
CKI
CKDVN
CVSS
IOUTB
VBB
N.C.
AVSSB
C
SM
5
86
5
M
0.36 0.10
10.20 0.30
10.05 0.20
0.10 0.10
1.80
7.80 0.30
5.40 0.20
0 10
0.50 0.20
0.8
0.12
M
0.10
1.90
-
0.10
+0.20
0.15
+ 0.10
- 0.05
SM5865CM
NIPPON PRECISION CIRCUITS--2
BLOCK DIAGRAM
Noise shaper
Input interface
Timing
control
RSTN
DVSS
CKI
AVSSA
31 Level
DEM DAC
31 Level
DEM DAC
DVDD
CKDVN
CVSS
Interpolation
TO
TSTN
Divider
IWSL
WCKI
BCKI
DI
Noise shaper
31 Level
DEM DAC
31 Level
DEM DAC
VBB
IOUTB
RB
AVDDB
AVDDA
VBA
IOUTA
RA
AVSSB
1
2
3
4
5
6
7
8
9
11
10
12
13
15
16
17
18
19
21
22
23
24
SM5865CM
NIPPON PRECISION CIRCUITS--3
PIN DESCRIPTION
I
P
: Pull-up input
Number
Name
I/O
Description
1
DVSS
Digital ground
2
DI
I
Data input
3
BCKI
I
Bit clock input
4
WCKI
I
Word clock input
5
IWSL
Ip
Input data word length select. 24-bit when HIGH, and 20-bit when LOW.
6
RSTN
Ip
System reset. Reset when LOW.
7
TSTN
Ip
Test pin. Tie HIGH or leave open for normal operation.
8
TO
O
Test output
9
DVDD
Digital supply
10
CKI
I
System clock input
11
CKDVN
Ip
System clock frequency divider ratio select. 1 when HIGH (no division), and 2 when LOW (half of the
input frequency).
12
CVSS
System clock ground
13
AVSSB
Analog ground B
14
N. C.
Leave open for no connection or connect with ground
15
VBB
O
1/2 supply output B
16
IOUTB
O
Inverse-phase analog output B
17
RB
I
Built-in resistor connection B
18
AVDDB
Analog supply B
19
AVDDA
Analog supply A
20
N. C.
Leave open for no connection or connect with ground
21
VBA
O
1/2 supply output A
22
IOUTA
O
In-phase analog output A
23
RA
I
Built-in resistor connection A
24
AVSSA
Analog ground A
SM5865CM
NIPPON PRECISION CIRCUITS--4
SPECIFICATIONS
Absolute Maximum Ratings
DVSS = AVSSA = AVSSB = CVSS = 0 V, DVDD = AVDDA = AVDDB
Recommended Operating Conditions
DVSS = AVSSA = AVSSB = CVSS = 0 V, DVDD = AVDDA = AVDDB
Parameter
Symbol
Rating
Unit
Supply voltage range
DVDD, AVDDA, AVDDB
-
0.3 to 7.0
V
Input voltage range
1
1. Pins DI, BCKI, WCKI, CKDVN, IWSL, RSTN, TSTN.
Also applicable during supply switching.
V
IN
DVSS
-
0.3 to DVDD
+
0.3
V
Storage temperature range
T
stg
-
55 to 125
C
Power dissipation
P
D
250
mW
Parameter
Symbol
Rating
Unit
Supply voltage range
DVDD, AVDDA, AVDDB
4.5 to 5.5
V
Supply voltage variation
DVDD
-
AVDDA,
DVDD
-
AVDDB,
AVDDA
-
AVDDB,
DVSS
-
AVSSA,
DVSS
-
AVSSB,
AVSSA
-
AVSSB,
DVSS
-
CVSS,
AVSSA
-
CVSS,
AVSSB
-
CVSS
0.1
V
Operating temperature range
T
opr
-
40 to 85
C
SM5865CM
NIPPON PRECISION CIRCUITS--5
DC Electrical Characteristics
Recommended operating conditions, unless otherwise specified.
Parameter
Symbol
Condition
Rating
Unit
min
typ
max
DVDD, AVDDA, AVDDB
supply current
1
1. No output load, NPC-standard input data pattern.
I
DD
f
CKI
= 11.2896 MHz
7
11
mA
f
CKI
= 16.9344 MHz
10
14
mA
f
CKI
= 24.576 MHz
15
19
mA
f
CKI
= 36.864 MHz
21
26
mA
CKI HIGH-level input voltage
V
IHC
0.7
DVDD
V
CKI LOW-level input voltage
V
ILC
0.3
DVDD
V
CKI input voltage
V
INAC
AC coupling
1.0
Vp-p
HIGH-level input voltage
2
2. Pins DI, BCKI, WCKI, CKDVN, IWSL, RSTN, TSTN.
V
IH
2.4
V
LOW-level input voltage
2
V
IL
0.5
V
HIGH-level output voltage
3
3. Pin TO.
V
OH
I
OH
=
-
1 mA
DVDD
-
0.4
V
LOW-level output voltage
3
V
OL
I
OL
= 1 mA
0.4
V
CKI HIGH-level input current
I
IHC
V
IN
= DVDD
30
60
120
A
CKI LOW-level input current
I
ILC
V
IN
= 0 V
30
60
120
A
LOW-level input current
4
4. Pins CKDVN, IWSL, RSTN, TSTN.
I
IL2
V
IN
= 0 V
5
15
A
HIGH-level input leakage current
5
5. Pins DI, BCKI, WCKI.
I
IH1
V
IN
= DVDD
1.0
A
LOW-level input leakage current
5
I
IL1
V
IN
= 0 V
1.0
A
HIGH-level input leakage current
4
I
IH2
V
IN
= DVDD
1.0
A
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