SM5878AM/AV
NIPPON PRECISION CIRCUITS INC.
3rd-order
Σ∆
, 2-channel D/A converter
OVERVIEW
The SM5878AM/AV is a 3rd-order
Σ∆
, 2-channel
D/A converter LSI for digital audio reproduction
equipment. It also incorporates an 8-times
oversampling digital filter and analog, post-converter
lowpass filters.
The SM5878AM/AV has digital deemphasis filter,
attenuator, and soft mute circuits built-in. Double-
speed operation and low-voltage operation are also
supported.
SM5878AM/AV D/A converter incorporates 3rd-
order
∑∆
modulator and DEM (Dynamic Element
Mating) circuits for high performance, even in the
presence of clock jitter.
The SM5878AM/AV operates from a 4.5 to 5.5 V
supply, and is available in 24-pin SSOP or VSOPs.
PINOUT
MUTE
DEEM
CKO
DVSS
BCKI
DI
DVDD
LRCI
TSTN
TO1
AVDDL
LO
1
2
3
4
5
24
23
22
21
20
ATCK
MODE
RSTN
DS
XVSS
XTO
XTI
XVDD
MUTEO
AVDDR
RO
AVSS
SM5878
6
7
8
9
10
11
12
19
18
17
16
15
14
13
FEATURES
s
s
s
ORDERING INFORMATIONS
DEVICE
SM5878AM
SM5878AV
PACKAGE
24 - pin SSOP
24 - pin VSOP
s
s
s
s
s
s
s
s
s
s
4.5 to 5.5 V operating supply voltage range
44.1 kHz sampling frequency
Normal (384fs) and double-speed (192fs),
16.9344 MHz system clock
16.9344 MHz crystal oscillator circuits built-in
16-bit, MSB first, rear-packed serial data input
format (
≤
64fs bit clock)
8-times oversampling digital filter
• 32 dB stopband attenuation
• ±0.05 dB passband ripple
Deemphasis filter operation
• 36 dB stopband attenuation
•
−
0.09 to +0.23 dB deviation from ideal
deemphasis filter characteristics
Attenuator
• 6-bit attenuator (64 steps)
• Soft mute function when MODE is HIGH
(approx. 1024/fs total muting time)
Built-in infinity-zero detector
Σ∆
2-channel D/A converter
• 3rd-order noise shaper
• 32fs oversampling (16fs for double-speed
mode)
2nd-order analog, post-converter lowpass filters
built-in
24-pin SSOP/VSOP
Molybdenum-gate CMOS process
NIPPON PRECISION CIRCUITS—1
SM5878AM/AV
PACKAGE DIMENSIONS
Unit: mm
24-pin SSOP
24-pin VSOP
5.40 0.20
7.80 0.30
5.6 0.1
7.6 0.2
10.05 0.20
10.20 0.30
1.80 0.10
0.15
−
0.05
+
0.1
0.15
−
0.02
+
0.05
7.8 0.1
0.10 0.10
2.10MAX
0.7
0.8
0.1 0.1
0.36 0.10
1.25
−0.1
+0.2
0.50 0.20
0 10
0.65
0.22
−0.05
+0.1
0.5 0.2
0 10
Package Marking
Package Marking
S M 5 8 7 8 A M
S M 5 8 7 8 A V
NIPPON PRECISION CIRCUITS—2
SM5878AM/AV
BLOCK DIAGRAM
LRCI
BCKI
DI
Input interface
MODE
ATCK
MUTE
L
R
MUTEO
Attenuation
counter
Filter & attenuation
operation block
L
R
DEEM
CKO
XVSS
XTO
RSTN
DS
DVSS
DVDD
TSTN
TO1
Timing
control
Noise shaper
operation block
XTI
XVDD
AVDDL
11Level
DEM DAC
11Level
DEM DAC
11Level
DEM DAC
11Level
DEM DAC
AVDDR
+
−
−
+
LO
AVSS
RO
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
Name
MUTE
DEEM
CKO
DVSS
BCKI
DI
DVDD
LRCI
TSTN
I/O
Ip
Ip
O
-
Ip
Ip
-
Ip
Ip
Description
When MODE is HIGH: Soft mute ON/OFF control. Mute is active when HIGH.
When MODE is LOW: Attenuator level direction control. The attenuator direction is down when HIGH.
Deemphasis control. Deemphasis is ON when HIGH, and OFF when LOW.
16.9344 MHz clock output
Digital ground
Bit clock input
Serial data input
Digital supply
Input sample data rate (fs) clock input pin. Left-channel input when HIGH, and right-channel input when
LOW.
Test pin. Test mode when LOW.
NIPPON PRECISION CIRCUITS—3
SM5878AM/AV
Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
TO1
AVDDL
LO
AVSS
RO
AVDDR
MUTEO
XVDD
XTI
XTO
XVSS
DS
RSTN
MODE
ATCK
I/O
O
-
O
-
O
-
O
-
I
O
-
Ip
Ip
Ip
Ip
Test output 1. Normally LOW.
Left-channel analog supply
Left-channel analog output
Analog ground
Right-channel analog output
Right-channel analog supply
Infinity-zero detection output
Crystal oscillator supply
Crystal oscillator or 16.9344 MHz external clock input
Crystal oscillator output
Crystal oscillator ground
Double/Normal-speed mode select. Double-speed mode when HIGH.
Reset pin. Reset when LOW.
Soft mute/attenuator mode select. Soft mute mode when HIGH.
Attenuator level setting clock. Disabled when MODE is HIGH.
Description
SPECIFICATIONS
Absolute Maximum Ratings
DV
SS
= AV
SS
= XV
SS
= 0 V, AV
DD
= AV
DDL
= AV
DDR
Parameter
Supply voltage range
Input voltage range
1
XTI input voltage range
Storage temperature range
Power dissipation
Soldering temperature
Soldering time
Symbol
DV
DD
, AV
DD
, XV
DD
V
IN1
V
IN
T
stg
P
D
T
sld
t
sld
Rating
−
0.3 to 7.0
DV
SS
−
0.3 to DV
DD
+
0.3
XV
SS
−
0.3 to XV
DD
+
0.3
−
55 to 125
250
255
10
Unit
V
V
V
°
C
mW
°
C
s
1. Pins MUTE, DEEM, BCKI, DI, LRCI, TSTN, DS, RSTN, MODE and ATCK.
Also applicable during supply switching.
Recommended Operating Conditions
DV
SS
= AV
SS
= XV
SS
= 0 V, AV
DD
= AV
DDL
= AV
DDR
Parameter
Supply voltage range
Symbol
DV
DD
, AV
DD
, XV
DD
DV
DD
−
XV
DD
,
DV
DD
−
AV
DD
,
XV
DD
−
AV
DD
,
DV
SS
−
XV
SS
,
DV
SS
−
AV
SS
,
XV
SS
−
AV
SS
T
opr
Rating
4.5 to 5.5
Unit
V
Supply voltage variation
±0.1
V
Operating temperature range
−
40 to 85
°
C
note) Since DVDD, XVDD, AVDDL, and AVDDR are connected via the LSI substrate, current may flow if potential difference occurs among them.
NIPPON PRECISION CIRCUITS—4
SM5878AM/AV
DC Electrical Characteristics
DV
SS
= AV
SS
= XV
SS
= 0 V, DV
DD
= AV
DD
= XV
DD
= 4.5 to 5.5 V, AV
DD
= AV
DDL
= AV
DDR
, T
a
=
−
40 to 85
°
C
Rating
Parameter
DVDD digital supply current
1
XVDD system clock supply current
1
AVDD analog supply current
1
XTI HIGH-level input voltage
XTI LOW-level input voltage
XTI AC-coupled input voltage
HIGH-level input voltage
3
LOW-level input voltage
3
HIGH-level output voltage
4
LOW-level output voltage
4
CKO HIGH-level output voltage
CKO LOW-level output voltage
XTI HIGH-level input current
XTI LOW-level input current
LOW-level input current
4
Input leakage current
4
Symbol
I
DDD
I
DDX
I
DDA2
V
IH1
V
IL1
V
INAC
V
IH2
V
IL2
V
OHA
V
OLA
V
OHC
V
OLC
I
IH1
I
IL1
I
IL2
I
LH
I
OH
=
−
1 mA
I
OL
= 1 mA
I
OH
=
−1
mA
I
OL
= 1 mA
V
IN
= XV
DD
V
IN
= 0 V
V
IN
= 0 V
V
IN
= DV
DD
Clock input
Clock input
Condition
min
–
–
–
0.7XV
DD
–
0.3XV
DD
2.4
–
AV
DD
−
0.4
–
DV
DD
−
0.4
–
–
–
–
–
typ
10
1.5
8.5
–
–
–
–
–
–
–
–
–
9
9
9
–
max
15
3
12
–
0.3XV
DD
–
–
0.5
–
0.4
–
0.4
18
18
18
1.0
mA
mA
mA
V
V
V
p-p
V
V
V
V
V
V
µA
µA
µA
µA
Unit
1. DV
DD
= AV
DD
= XV
DD
= 5 V, DS = 5 V (double speed), XTI clock input frequency f
XTI
= 16.9344 MHz, no output load.
2. I
DDA
is the total current.
3. Pins MUTE, DEEM, BCKI, DI, LRCI, TSTN, DS, RSTN, MODE and ATCK.
4. Pins TO1 and MUTEO.
AC Electrical Characteristics
System clock (XTI)
Crystal Oscillator
Rating
Parameter
Oscillator frequency
Symbol
min
f
OSC
4.0
typ
16.9344
max
20.0
MHz
Unit
NIPPON PRECISION CIRCUITS—5
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