NPC SM5865AM Datasheet
Σ∆
SM5865AM
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
The SM5865AM is a 24-bit input D/A converter for
high-quality digital audio equipment. It comprises
newly developed DEM (dynamic element matching)
circuits, 3rd-order Σ∆ noise shaper and 23-level
quantizer to control wide-band residual quantization
noise in the signal band, making it ideal for application with high-frequency sampling formats. Also, the
order of the required final-stage analog lowpass filter
can be reduced, compared to filters for available
devices, enhancing output tone quality. The output
stage employs complementary outputs for high-accuracy analog signals, with appropriate lowpass filtering of the output signal.
A single SM5865AM IC can be used in combination
with an 8-times oversampling digital filter for conversion for a single audio channel.
FEATURES
PINOUT
(Top view)
DVDD
CKDVN
DVSS
DI
BCKI
WCKI
IWSL
RSTN
TSTN
TO
CKI
CVSS
D/A Converter
1
SM5
865 M
A
12
24
13
AVSSA
RAP
IOUTA
IOUTAN
RAN
AVDDA
AVDDB
RBP
IOUTB
IOUTBN
RBN
AVSSB
Single-channel D/A converter built-in
■
High performance
■
(120 dB signal-to-noise ratio)
(0.001% total harmonic distortion and noise)
(110 dB dynamic range)
D/A converter
■
• 3rd-order noise shaper
• 23-level quantizer
Input data format
■
• 20 or 24-bit word length
• MSB first, right-justified format
• 8 or 4 times oversampling at fs = 32/44.1/48/
88.2/96/192 kHz
System clock frequency
■
• 128/192/256/384/512/768 fs
Single 5 V operating supply voltage
■
24-pin SSOP package
■
Molybdenum-gate CMOS process
■
ORDERING INFORMATION
Device Package
SM5865AM 24-pin SSOP
preliminary
PACKAGE DIMENSIONS
(Unit: mm)
24-pin SSOP
7.80 0.30
5.40 0.20
10.05 0.20
10.20 0.30
0.8
0.10
0.36 0.10
0.12
M
1.80
+0.20
−0.10
1.90
0.10 0.10
0.50 0.20
0.15
0.1
+
0.05
−
010
NIPPON PRECISION CIRCUITS—1
BLOCK DIAGRAM
SM5865AM
DVDD
CKI
CKDVN
CVSS
AVSSB
TO TSTN
9
10
Divider
11
12
13
RSTN
Timing
control
Noise shaper
23 Level
DEM DAC
IWSL WCKI BCKI DI
Input interface
Interpolation
23 Level
DEM DAC
23 Level
DEM DAC
2345678
Noise shaper
23 Level
DEM DAC
1
DVSS
24
AVSSA
14 15 16 17 18 19 20 21 22 23
RBN
IOUTBN
IOUTB
RBP
AVDDB
AVDDA
RAN
IOUTAN
IOUTA
RAP
preliminary
NIPPON PRECISION CIRCUITS—2
SM5865AM
PIN DESCRIPTION
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.
12 CVSS – System clock ground
13 AVSSB – Analog ground B
14 RBN I Built-in resistor connection B
15 IOUTBN O Inverse-phase analog output B
16 IOUTB O In-phase analog output B
17 RBP I Built-in resistor connection B
18 AVDDB – Analog supply B
19 AVDDA – Analog supply A
20 RAN I Built-in resistor connection A
21 IOUTAN O Inverse-phase analog output A
22 IOUTA O In-phase analog output A
23 RAP I Built-in resistor connection A
24 AVSSA – Analog ground A
I
: Pull-up input
P
preliminary
NIPPON PRECISION CIRCUITS—3
−
−
+
−
°
°
SM5865AM
SPECIFICATIONS
Absolute Maximum Ratings
DV
= AV
SS
Supply voltage range DV
Input voltage range
Storage temperature range T
Power dissipation P
Soldering temperature T
Soldering time t
1. Pins DI, BCKI, WCKI, CKDVN, IWSL, RSTN, TSTN.
Also applicable during supply switching.
SSA
= AV
1
= CV
SSB
Parameter Symbol Rating Unit
= 0 V, DV
SS
DD
= AV
DD
DDA
, AV
V
DDA
IN
stg
sld
sld
D
−
−
= AV
, AV
−
DDB
−
DDB
−
−
−
−
−
−
°
0.3 to 7.0 V
DV
0.3 to DV
SS
55 to 125
250 mW
255
10 s
0.3 V
DD
C
C
Recommended Operating Conditions
DV
= AV
SS
Supply voltage range DV
Supply voltage variation
Operating temperature range T
SSA
= AV
= CV
SSB
Parameter Symbol Rating Unit
= 0 V, DV
SS
DD
= AV
DD
DV
DV
AV
DV
DV
AV
DV
AV
AV
DDA
, AV
DD
DD
DDA
SS
SS
SSA
SS
SSA
SSB
DDA
AV
AV
AV
AV
AV
AV
CV
CV
CV
opr
= AV
, AV
DDB
DDA
DDB
DDB
,
SSA
,
SSB
SSB
,
SS
SS
SS
,
,
,
,
,
DDB
4.5 to 5.5 V
±0.1 V
40 to 85
C
preliminary
NIPPON PRECISION CIRCUITS—4
SM5865AM
DC Electrical Characteristics
Recommended operating conditions, unless otherwise specified
−
Parameter Symbol Condition
DDA
1
1
2
2
3
3
4
5
5
6
= AV
= 5 V, system clock input frequency f
DDB
I
I
V
V
DDD
DDA
IHC
ILC
INAC
V
V
OH
OL
IHC
ILC
I
IL2
I
IH1
I
IL1
I
IH2
IH
IL
DVDD supply current
AVDDA, AVDDB supply current
CKI HIGH-level input voltage V
CKI LOW-level input voltage V
CKI input voltage V
HIGH-level input voltage
LOW-level input voltage
HIGH-level output voltage
LOW-level output voltage
CKI HIGH-level input current I
CKI LOW-level input current I
LOW-level input current
HIGH-level input leakage current
LOW-level input leakage current
HIGH-level input leakage current
1. DV
= AV
DD
2. Pins DI, BCKI, WCKI, CKDVN, IWSL, RSTN, TSTN.
3. Pin TO.
4. Pins CKDVN, IWSL, RSTN, TSTN.
5. Pins DI, BCKI, WCKI.
6. Pins CKDVN, IWSL, RSTN, TSTN.
Rating
min typ max
Unit
TBD
0.7V
DD
– – 0.3V
AC coupling 1.0 – – V
2.4 – – V
– – 0.5 V
I
= − 1 mA DV
OH
I
= 1 mA – – 0.4 V
OL
V
= DV
IN
DD
V
= 0 V 30 60 120 µA
IN
V
= 0 V – 9 18 µA
IN
V
= DV
IN
DD
V
= 0 V – – 1.0 µA
IN
V
= DV
IN
DD
= 16.9344 MHz, no output load, NPC-standard input data pattern.
CKI
0.4 – – V
DD
30 60 120 µA
– – 1.0 µA
– – 1.0 µA
––V
DD
mA
mA
V
preliminary
NIPPON PRECISION CIRCUITS—5
AC Electrical Characteristics
System clock (CKI)
SM5865AM
Parameter Symbol
HIGH-level clock pulsewidth t
LOW-level clock pulsewidth t
Clock pulse cycle t
CKI
t
CWL
Reset Input (RSTN)
Parameter Symbol Condition
RSTN LOW-level pulsewidth t
RSTN
At power ON 1 – – µs
After power ON 100 – – ns
CWH
CWL
CKI
Rating
min typ max
TBD – TBD ns
TBD – TBD ns
TBD – TBD ns
V
IH1
0.5V
DD
V
t
CWH
t
CKI
Rating
min typ max
IL1
Unit
Unit
Serial input (BCKI, DI, WCKI)
Parameter Symbol
BCKI HIGH-level pulsewidth t
BCKI LOW-level pulsewidth t
BCKI pulse cycle t
DI setup time t
DI hold time t
WCKI edge to first BCKI rising edge t
Last BCKI rising edge to WCKI edge t
BCKI
t
BCWH
t
BCY
BCWL
t
DI
t
preliminary
DS
WCKI
BCWH
BCWL
BCY
DS
DH
BW
WB
t
DH
Rating
Unit
min typ max
10 – – ns
10 – – ns
20 – – ns
5––ns
5––ns
10 – – ns
10 – – ns
1.5V
1.5V
1.5V
t
WB
t
WL
NIPPON PRECISION CIRCUITS—6
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