NPC SM5876AM Datasheet
SM5876AM
NIPPON PRECISION CIRCUITS INC.
3rd-order Σ∆ , 2-channel D/A Converter
OVERVIEW
The SM5876AM is a 3rd-order Σ∆ , 2-channel D/A
converter LSI for CD-ROM digital audio reproduction equipment. It incorporates an 8-times oversampling digital filter, deemphasis filter, attenuator, and
soft mute circuits built-in., using NPC’s Molybdenum-gate CMOS technology.
The SM5876AM operates from a 2.7 to 5.5 V supply,
and is available in 24-pin SSOPs.
FEATURES
System clock
■
• 768fs (33.8688MHz)
• 384fs (16.9344MHz)
■
Crystal oscillator circuit built-in
■
Infinity-zero detector circuit built-in
■
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
• − 0.34 dB passband correction for 70 kHz LPF
■
3-line microcontroller interface for output mode
and attenuator control settings
■
16 output modes
■
Deemphasis filter operation
• 36 dB stopband attenuation
• − 0.09 to +0.23 dB deviation
• − 0.34 dB passband correction for 70 kHz LPF
■
Attenuator
• 8-bit attenuator (linear 256 steps)
• Independent left/right-channel set function
• Soft mute function (approx. 1024/fs mute time)
■
Σ∆ 2-channel D/A converter
• 3rd-order noise shaper
• 32fs oversampling
■
44.1 kHz sampling frequency
■
2.7 to 5.5 V operating supply voltage range (4.5 to
5.5 V operating supply voltage range with 768fs
system clock)
■
24-pin SSOP
■
Molybdenum-gate CMOS process
PINOUT
MLEN
DVDD
TSTN
AVDDL
1
CKSL
CKO
DVSS
BCKI
DI
LRCI XVDD
LO
12 13
LON AVSS
SM5
876
A
M
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
0.36 0.10
1.80 0.10
2.10MAX
0.10 0.10
24
0.50 0.20
MCK
MDT
RSTN
MUTEO
XVSS
XTO
XTI
RO
AVDDR
RON
0.1
+
0.05
−
0.15
010
NIPPON PRECISION CIRCUITS—1
BLOCK DIAGRAM
SM5876AM
LRCI DIBCKI
MLEN
MCK
MDT
RSTN
CKSL
DVSS
DVDD
TSTN
AVDDL
Microcontroller
interface
Timing
control
PWM data
generation block
Filter & attenuation
L
R
Input interface
LR
operation block
LR
Noise shaper
operation block
MUTEO
CKO
XVSS
XTO
XTI
XVDD
AVDDR
LO AVSS RON
ROLON
PIN DESCRIPTION
Number Name I/O Description
1 MLEN Ip Microcontroller control latch clock input
2 CKSL Ip 768fs/384fs clock select. 768fs when HIGH, and 384fs when LOW.
3 CKO O Oscillator clock buffer output
4 DVSS Digital ground pin
5 BCKI Ip Data bit clock input pin
6 DI Ip Serial data input pin
7 DVDD Digital supply pin
8 LRCI Ip Sample data rate (fs) clock input pin. Left channel when HIGH, and right channel when LOW.
9 TSTN Ip Test input pin
10 LO O Left-channel analog output (+)
11 AVDDL Left-channel analog supply pin
12 LON O Left-channel analog output ( − )
13 AVSS Analog ground pin
14 RON O Right-channel analog output ( − )
NIPPON PRECISION CIRCUITS—2
−
−
+
−
+
−
°
°
−
−
−
−
−
SM5876AM
Number Name I/O Description
15 AVDDR Right-channel analog supply pin
16 RO O Right-channel analog output (+)
17 XVDD Crystal oscillator supply pin
18 XTI I Crystal oscillator or external clock input pin
19 XTO O Crystal oscillator output pin
20 XVSS Crystal oscillator ground pin
21 MUTEO O Infinity-zero detector output (analog mute control)
22 RSTN Ip Reset pin. Reset when LOW.
23 MDT Ip Microcontroller control data input pin
24 MCK Ip Microcontroller control clock input pin
I: INPUT O: OUTPUT Ip: Input with pull-up Registor
−
−
° 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 MLEN, CKSL, BCKI, DI, LRCI, TSTN, MCK, MDT.
Also applicable during supply switching.
Recommended Operating Conditions
5 V operation: DV
Supply voltage range DV
Supply voltage variation
Operating temperature range T
SS
= XV
= 0 V, AV
SS
DD
= AV
DDL
= AV
Parameter Symbol Rating Unit
DD
1
SS
= AV
SS
= XV
= 0 V, AV
SS
DD
= AV
Parameter Symbol Rating Unit
DD
DV
DV
XV
DV
DV
XV
DDR
, AV
, AV
DD
DD
DD
SS
SS
SS
, XV
DD
DD
V
IN1
IN
stg
D
sld
sld
= AV
opr
DDL
DD
XV
AV
AV
XV
AV
AV
, XV
DD
DD
DD
SS
SS
SS
DDR
DD
,
,
,
,
,
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
40 to 125
250 mW
255
10 s
4.5 to 5.5 V
±0.1 V
40 to 85
C
C
NIPPON PRECISION CIRCUITS—3
SM5876AM
−
−
−
−
−
−
−
° C
3 V operation: DV
Supply voltage range DV
Supply voltage variation
Operating temperature range T
= AV
SS
Parameter Symbol Rating Unit
SS
= XV
= 0 V, AV
SS
DD
= AV
, AV
DD
DV
DD
DV
DD
XV
DD
DV
SS
DV
SS
XV
SS
DDL
DD
XV
AV
AV
XV
AV
AV
opr
DC Electrical Characteristics
5 V operation: DV
T
= − 40 to 85 ° C
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 v oltage
CKO HIGH-level output voltage V
CKO LOW-lev el output voltage V
XTI HIGH-level input current I
XTI LOW-level input current I
LOW-level input current
Input leakage current
1. DVDD = AVDD = XVDD = 5 V, CKSL = HIGH (768fs), XTI clock input frequency f
2. Pins MLEN, CKSL, BCKI, DI, LRCI, TSTN, MCK, MDT.
3. Pins LO, LON, RO, RON,MUTEO.
= AV
SS
1
2
2
3
3
2
2
= XV
SS
1
1
= 0 V, DV
SS
I
DDD
I
DDX
I
DDA
IH1
IL1
INAC
V
IH2
V
IL2
V
OHA
V
OLA
OHC
OLC
IH1
IL1
I
IL2
I
LH
= AV
DD
Total current – 1 2 mA
Clock input 0.7XV
Clock input – – 0.3XV
IOH = −1 mA AVDD − 0.4 – – V
IOL = 1 mA – – 0.4 V
IOH = −1 mA DVDD − 0.4 – – V
IOL = 1 mA – – 0.4 V
VIN = XV
VIN = 0 V – 12 25 µA
VIN = 0 V – 12 25 µA
VIN = DV
DD
DD
DD
= AV
, XV
DD
,
DD
,
DD
,
DD
,
SS
,
SS
SS
= XV
= 33.8688 MHz, no output load, NPC-standard input data pattern.
XTI
, CKSL = LOW (384fs)
DDR
2.7 to 4.5 V
±0.1 V
20 to 70
= 4.5 to 5.5 V, AV
DD
Rating
min typ max
–1525mA
–610mA
DD
0.3XV
DD
2.4 – – V
– – 0.5 V
–1225µA
– – 1.0 µA
––V
––V
DD
= AV
DDL
DD
= AV
Unit
V
p-p
DDR
,
3 V operation: DV
T
= − 20 to 70 ° C
a
Parameter Symbol Condition
DVDD digital supply current
XVDD system clock supply current
AVDD analog supply current
XTI HIGH-level input voltage V
SS
= AV
1
1
SS
1
= XV
= 0 V, DV
SS
I
DDD
I
DDX
I
DDA
IH1
= AV
DD
Total current – 0.5 1 mA
Clock input 0.7XV
DD
= XV
= 2.7 to 4.5 V, AV
DD
Rating
min typ max
–69mA
– 1.5 3 mA
DD
––V
NIPPON PRECISION CIRCUITS—4
DD
= AV
DDL
= AV
Unit
DDR
,
SM5876AM
Parameter Symbol Condition
Rating
min typ max
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 v oltage
2
2
3
3
CKO HIGH-level output voltage V
CKO LOW-lev el output voltage V
XTI HIGH-level input current I
XTI LOW-level input current I
LOW-level input current
Input leakage current
2
2
V
V
INAC
V
V
OHA
OLA
OHC
OLC
IH1
I
I
IL1
IH2
IL2
IL1
IL2
LH
1. DVDD = AVDD = XVDD = 3 V, CKSL = LOW (384fs), XTI clock input frequency f
2. Pins MLEN, CKSL, BCKI, DI, LRCI, TSTN, MCK, MDT.
Clock input – – 0.3XV
0.3XV
DD
––V
2.4 – – V
– – 0.5 V
IOH = −0.5 mA AVDD − 0.4 – – V
IOL = 0.5 mA – – 0.4 V
IOH = −0.5 mA DVDD − 0.4 – – V
IOL = 0.5 mA – – 0.4 V
VIN = XV
DD
–415µA
VIN = 0 V – 4 15 µA
VIN = 0 V – 4 15 µA
VIN = DV
DD
= 16.9344 MHz, no output load, NPC-standard input data pattern.
XTI
– – 1.0 µA
3. Pins LO, LON, RO, RON,MUTEO.
AC Electrical Characteristics
5 V operation: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 4.5 to 5.5 V, AVDD = AV
Ta = −40 to 85 °C
DD
DDL
Unit
= AV
V
p-p
DDR
,
3 V operation: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 2.7 to 4.5 V, AVDD = AV
Ta = −20 to 70 °C, CKSL = LOW (384fs system clock)
System clock (XTI)
Crystal Oscillator
Parameter Symbol Condition
Oscillator frequency f
External clock input
Parameter Symbol Condition
HIGH-level clock pulsewidth t
LOW-level clock pulsewidth t
Clock pulse cycle t
OSC
CWH
CWL
XI
min typ max
768fs 8.0 33.8688 35.6 MHz
384fs 4.0 16.9344 17.8 MHz
min typ max
768fs 13.0 14.75 62.5 ns
384fs 26.0 29.5 125 ns
768fs 13.0 14.75 62.5 ns
384fs 26.0 29.5 125 ns
768fs 28.0 29.5 125 ns
384fs 56.0 59.0 250 ns
Rating
Rating
DDL
= AV
Unit
Unit
DDR
,
NIPPON PRECISION CIRCUITS—5
XTI input clock
Serial input (BCKI, DI, LRCI)
t
CWH
SM5876AM
V
IH1
0.5V
DD
V
t
CWL
t
XI
IL1
Parameter Symbol
BCKI HIGH-level pulsewidth t
BCKI LOW-level pulse width t
BCKI pulse cycle t
DI setup time t
DI hold time t
Last BCKI rising edge to LRCI edge t
LRCI edge to first BCKI rising edge t
Serial input timing
BCKI
t
DS
BCWH
BCWL
BCY
DS
DH
t
BCWH
t
Rating
min typ max
50 – – ns
50 – – ns
1/(64fs) – – ns
50 – – ns
50 – – ns
BL
LB
t
50 – – ns
50 – – ns
BCY
t
BCWL
Unit
1.5V
DH
DI
LRCI
1.5V
t
BL
t
LB
1.5V
NIPPON PRECISION CIRCUITS—6
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