NPC SM5877AM Datasheet
SM5877AM
NIPPON PRECISION CIRCUITS INC.
3rd-order Σ∆ , 2-channel D/A Converter
OVERVIEW
The SM5877AM 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 SM5877AM has digital deemphasis filter, attenuator, and soft mute circuits built-in. Double-speed
operation and low-voltage operation are also supported.
The SM5877AM operates from a 2.7 to 5.5 V supply,
and is available in 24-pin SSOPs.
FEATURES
■
2.7 to 5.5 V operating supply voltage range
■
4.5 to 5.5 V operating supply voltage range for
double-speed mode
■
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)
■
3rd-order analog, post-converter lowpass filters
built-in (165 kHz cut-off frequency)
■
24-pin SSOP
■
Molybdenum-gate CMOS process
PINOUT
1MUTE
2DEEM
3CKO
4DVSS
5BCKI
6DI
SM5877AM
7DVDD
8LRCI
9TSTN
10TO1
11AVDDL
12LO 13 AVSS
PACKAGE DIMENSIONS
Unit: mm
24-pin SSOP
7.80 0.30
5.40 0.20
10.05 0.20
10.20 0.30
0.7 0.8
Package Marking
0.36 0.10
1.80 0.10
2.10MAX
0.10 0.10
24 ATCK
23 MODE
22 RSTN
21 DS
20 XVSS
19 XTO
18 XTI
17 XVDD
16 MUTEO
15 AVDDR
14 RO
0.15
0.50 0.20
MA7785MS
0.1
+
0.05
−
010
NIPPON PRECISION CIRCUITS—1
BLOCK DIAGRAM
SM5877AM
LRCI DIBCKI
MODE
ATCK
MUTE
RSTN
DS
DVSS
DVDD
TSTN
TO1
AVDDL
Attenuation
counter
Timing
control
PWM data
generation block
Filter & attenuation
L
R
Input interface
LR
operation block
LR
Noise shaper
operation block
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 pin
5 BCKI Ip Bit clock input pin
6 DI Ip Serial data input pin
7 DVDD Digital supply pin
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 rightchannel input when LOW.
NIPPON PRECISION CIRCUITS—2
−
−
+
−
+
−
°
°
−
−
−
−
−
−
±
−
° C
SM5877AM
Number Name I/O Description
10 TO1 O Test output 1. Normally LOW.
11 AVDDL Left-channel analog supply pin
12 LO O Left-channel analog output
13 AVSS Analog ground pin
14 RO O Right-channel analog output
15 AVDDR Right-channel analog supply pin
16 MUTEO O Infinity-zero detection output
17 XVDD Crystal oscillator supply pin
18 XTI I Crystal oscillator or 16.9344 MHz external clock input pin
19 XTO O Crystal oscillator output pin
20 XVSS Crystal oscillator ground pin
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.
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
Normal-voltage: DV
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
= AV
SS
= XV
= 0 V, AV
SS
DD
V
= AV
Parameter Symbol Rating Unit
, AV
DD
DV
DD
DV
DD
XV
DD
DV
SS
DV
SS
XV
SS
sld
IN1
IN
stg
sld
opr
DD
D
DD
XV
AV
AV
XV
AV
AV
, XV
DDL
, XV
DD
DD
DD
SS
SS
SS
DD
= AV
DD
,
,
,
,
,
DDR
0.3 to 7.0 V
DV
0.3 to DV
XV
SS
SS
0.3 to XV
DD
DD
40 to 125
250 mW
255
10 s
4.5 to 5.5 V
0.1 V
40 to 85
0.3 V
0.3 V
C
C
NIPPON PRECISION CIRCUITS—3
SM5877AM
−
−
−
−
Low-voltage: DV
SS
= AV
SS
= XV
= 0 V, AV
SS
DD
= AV
Parameter Symbol Rating Unit
Supply voltage range DV
Supply voltage variation
, AV
DD
DV
DD
DV
DD
XV
DD
DV
SS
DV
SS
XVSS − AV
Operating temperature range T
DC Electrical Characteristics
Normal-voltage: DV
AV
, T
DDR
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
2. I
DDA
3. Pins MUTE, DEEM, BCKI, DI, LRCI, TSTN, DS, RSTN, MODE and ATCK.
4. Pins TO1 and MUTEO.
= − 40 to 85 ° C
a
Parameter Symbol Condition
1
= AV
DD
= XV
DD
is the total current.
= AV
SS
3
3
4
4
4
4
= 5 V, DS = 5 V (double speed), XTI clock input frequency f
DD
= XV
SS
1
1
I
DDD
I
DDX
I
DDA
V
V
V
V
I
IH1
IL1
INAC
IH2
IL2
OHA
OLA
OHC
OLC
IH1
IL1
IL2
I
LH
= 0 V, DV
SS
2
DD
Clock input 0.7XV
Clock input – – 0.3XV
IOH = −1 mA
IOL = 1 mA – – 0.4 V
IOH = −1 mA
IOL = 1 mA – – 0.4 V
VIN = XV
DD
VIN = 0 V – 12 25 µA
VIN = 0 V – 12 25 µA
VIN = DV
DD
DDL
, XV
DD
XV
AV
AV
XV
− AV
opr
= AV
= AV
DDR
DD
,
DD
,
DD
,
DD
,
SS
,
SS
SS
DD
= XV
= 4.5 to 5.5 V, AV
DD
min typ max
–1525mA
–25mA
–48mA
DD
0.3XV
DD
2.4 – – V
– – 0.5 V
−
AV
DD
0.4
−
DV
DD
0.4
–1225µA
– – 1.0 µA
= 16.9344 MHz, no output load.
XTI
2.7 to 4.5 V
±0.1 V
−20 to 70 °C
= AV
DD
DDL
Rating
Unit
––V
DD
––V
V
p-p
––V
––V
=
NIPPON PRECISION CIRCUITS—4
SM5877AM
Low-voltage: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 2.7 to 4.5 V, AVDD = AV
Ta = −20 to 70 °C
DD
DD
−
−
Rating
––V
––V
––V
––V
Parameter Symbol Condition
DVDD digital supply current
XVDD system clock supply
1
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
1
3
3
4
4
4
4
I
DDD
I
DDX
I
DDA
V
V
V
V
I
IH1
IL1
INAC
IH2
IL2
OHA
OLA
OHC
OLC
IH1
IL1
IL2
I
LH
2
Clock input 0.7XV
Clock input – – 0.3XV
IOH = −0.5 mA
IOL = 0.5 mA – – 0.4 V
IOH = −0.5 mA
IOL = 0.5 mA – – 0.4 V
VIN = XV
DD
VIN = 0 V – 4 15 µA
VIN = 0 V – 4 15 µA
VIN = DV
DD
1. DVDD = AVDD = XVDD = 3 V, DS = 0 V (normal speed), XTI clock input frequency f
2. I
is the total current.
DDA
3. Pins MUTE, DEEM, BCKI, DI, LRCI, TSTN, DS, RSTN, MODE and ATCK.
4. Pins TO1 and MUTEO.
min typ max
–69mA
–13mA
–12mA
0.3XV
2.4 – – V
– – 0.5 V
AV
DD
0.4
DV
DD
0.4
–415µA
– – 1.0 µA
= 16.9344 MHz, no output load.
XTI
DDL
DD
= AV
Unit
V
p-p
DDR
,
AC Electrical Characteristics
Normal-voltage: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 4.5 to 5.5 V, AVDD = AV
AV
, Ta = −40 to 85 °C
DDR
Low-voltage: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 2.7 to 4.5 V, AVDD = AV
Ta = −20 to 70 °C
System clock (XTI)
Crystal Oscillator
Parameter Symbol
Oscillator frequency f
OSC
min typ max
4.0 16.9344 17.8 MHz
Rating
DDL
= AV
DDL
Unit
DDR
=
,
NIPPON PRECISION CIRCUITS—5
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