NPC SM5878AM, SM5878AV Datasheet
SM5878AM/AV
NIPPON PRECISION CIRCUITS INC.
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-con verter
lowpass filters.
The SM5878AM/AV has digital deemphasis filter,
attenuator, and soft mute circuits built-in. Doublespeed operation and low-voltage operation are also
supported.
SM5878AM/AV D/A converter incorporates 3rdorder ∑∆ 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.
3rd-order Σ∆ , 2-channel D/A converter
PINOUT
1MUTE
2DEEM
3CKO
4DVSS
5BCKI
6DI
7DVDD
8LRCI
9TSTN
10TO1
11AVDDL
12LO 13 AVSS
SM5878
24 ATCK
23 MODE
22 RSTN
21 DS
20 XVSS
19 XTO
18 XTI
17 XVDD
16 MUTEO
15 AVDDR
14 RO
FEATURES
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
■
ORDERING INFORMATIONS
DEVICE PACKAGE
SM5878AM 24 - pin SSOP
SM5878AV 24 - pin VSOP
NIPPON PRECISION CIRCUITS—1
PACKAGE DIMENSIONS
Unit: mm
SM5878AM/AV
24-pin SSOP
10.05 0.20
10.20 0.30
0.7 0.8
0.36 0.10
Package Marking
7.80 0.30
5.40 0.20
1.80 0.10
0.10 0.10
2.10MAX
0.50 0.20
24-pin VSOP
7.6 0.2
5.6 0.1
0.05
0.5 0.2
0.15
+
− 0.02
010
0.15
0.1
+
0.05
−
010
7.8 0.1
0.65
0.22
+0.1
−0.05
+0.2
0.1 0.1
−0.1
1.25
Package Marking
MA8785MS
VA8785MS
NIPPON PRECISION CIRCUITS—2
BLOCK DIAGRAM
SM5878AM/AV
LRCI DIBCKI
MODE
ATCK
MUTE
RSTN
DS
DVSS
DVDD
TSTN
TO1
AVDDL
Attenuation
counter
Timing
control
11Level
DEM DAC
11Level
DEM DAC
Input interface
LR
Filter & attenuation
operation block
LR
Noise shaper
operation block
11Level
DEM DAC
11Level
DEM DAC
MUTEO
DEEM
CKO
XVSS
XTO
XTI
XVDD
AVDDR
+−
LO AVSS RO
+−
PIN DESCRIPTION
Number Name I/O Description
1 MUTE Ip
2 DEEM Ip Deemphasis control. Deemphasis is ON when HIGH, and OFF when LOW.
3 CKO O 16.9344 MHz clock output
4 DVSS - Digital ground
5 BCKI Ip Bit clock input
6 DI Ip Serial data input
7 DVDD - Digital supply
8 LRCI Ip
9 TSTN Ip Test pin. Test mode when LOW.
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.
Input sample data rate (fs) clock input pin. Left-channel input when HIGH, and right-channel input when
LOW .
NIPPON PRECISION CIRCUITS—3
−
−
+
−
+
−
°
°
−
−
−
−
−
SM5878AM/AV
Number Name I/O Description
10 TO1 O Test output 1. Normally LOW.
11 AVDDL - Left-channel analog supply
12 LO O Left-channel analog output
13 AVSS - Analog ground
14 RO O Right-channel analog output
15 AVDDR - Right-channel analog supply
16 MUTEO O Infinity-zero detection output
17 XVDD - Crystal oscillator supply
18 XTI I Crystal oscillator or 16.9344 MHz external clock input
19 XTO O Crystal oscillator output
20 XVSS - Crystal oscillator ground
21 DS Ip Double/Normal-speed mode select. Double-speed mode when HIGH.
22 RSTN Ip Reset pin. Reset when LOW.
23 MODE Ip Soft mute/attenuator mode select. Soft mute mode when HIGH.
24 ATCK Ip Attenuator level setting clock. Disabled when MODE is HIGH.
−
−
° C
SPECIFICATIONS
Absolute Maximum Ratings
DV
= AV
SS
Supply voltage range DV
Input voltage range
XTI input voltage range V
Storage temperature range T
Power dissipation P
Soldering temperature T
Soldering time t
1. Pins MUTE, DEEM, BCKI, DI, LRCI, TSTN, DS, RSTN, MODE and ATCK.
Also applicable during supply switching.
Recommended Operating Conditions
DV
= AV
SS
Supply voltage range DV
Supply voltage variation
Operating temperature range T
SS
= XV
= 0 V, AV
SS
DD
= AV
DDL
= AV
DDR
Parameter Symbol Rating Unit
, AV
DD
1
SS
= XV
= 0 V, AV
SS
DD
= AV
DDL
= AV
DDR
Parameter Symbol Rating Unit
, AV
DD
DV
DD
DV
DD
XV
DD
DV
SS
DV
SS
XV
SS
, XV
DD
DD
V
IN1
IN
stg
D
sld
sld
, XV
DD
DD
XV
,
DD
AV
,
DD
AV
,
DD
XV
,
SS
AV
,
SS
AV
SS
opr
0.3 to 7.0 V
DV
XV
SS
SS
0.3 to DV
0.3 to XV
0.3 V
DD
0.3 V
DD
55 to 125
250 mW
255
10 s
4.5 to 5.5 V
±0.1 V
40 to 85
C
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
DC Electrical Characteristics
DV
= AV
SS
C
SS
= XV
= 0 V, DV
SS
DD
= AV
DD
= XV
SM5878AM/AV
= 4.5 to 5.5 V, AV
DD
DD
= AV
DDL
= AV
°
−
, T
DDR
= − 40 to 85
a
Parameter Symbol Condition
DVDD digital supply current
XVDD system clock supply current
AVDD analog supply current
XTI HIGH-level input voltage V
XTI LOW-level input voltage V
XTI AC-coupled input voltage V
HIGH-level input voltage
LOW-level input voltage
HIGH-level output voltage
LOW-level output voltage
CKO HIGH-level output voltage V
CKO LOW-level output voltage V
XTI HIGH-level input current I
XTI LOW-level input current I
LOW-level input current
Input leakage current
1. DV
= AV
DD
2. I
DDA
3. Pins MUTE, DEEM, BCKI, DI, LRCI, TSTN, DS, RSTN, MODE and ATCK.
= XV
DD
is the total current.
1
1
1
3
3
4
4
4
4
= 5 V, DS = 5 V (double speed), XTI clock input frequency f
DD
I
V
V
I
DDD
I
DDX
DDA
INAC
V
V
OHA
OHC
I
I
IH1
IL1
IH2
IL2
OLA
OLC
IH1
IL1
IL2
LH
2
Clock input 0.7XV
Clock input – – 0.3XV
I
= − 1 mA AV
OH
I
= 1 mA – – 0.4 V
OL
IOH = −1 mA DVDD − 0.4 – – V
IOL = 1 mA – – 0.4 V
VIN = XV
DD
VIN = 0 V – 9 18 µA
VIN = 0 V – 9 18 µA
VIN = DV
DD
4. Pins TO1 and MUTEO.
min typ max
–1015mA
– 1.5 3 mA
– 8.5 12 mA
DD
0.3XV
DD
2.4 – – V
– – 0.5 V
0.4 – – V
DD
– 9 18 µA
– – 1.0 µA
= 16.9344 MHz, no output load.
XTI
Rating
Unit
––V
DD
––V
V
p-p
AC Electrical Characteristics
System clock (XTI)
Crystal Oscillator
Parameter Symbol
Oscillator frequency f
OSC
Rating
Unit
min typ max
4.0 16.9344 20.0 MHz
NIPPON PRECISION CIRCUITS—5
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