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PDF SM5876 Data sheet ( Hoja de datos )
| Número de pieza | SM5876 | |
| Descripción | 3rd-order/ 2-channel D/A Converter | |
| Fabricantes | Nippon Precision Circuits Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SM5876 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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NIPPON PRECISION CIRCUITS INC.
SM5876AM
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 reproduc-
tion equipment. It incorporates an 8-times oversam-
pling digital filter, deemphasis filter, attenuator, and
soft mute circuits built-in., using NPC’s Molybde-
num-gate CMOS technology.
The SM5876AM operates from a 2.7 to 5.5 V supply,
and is available in 24-pin SSOPs.
FEATURES
s System clock
• 768fs (33.8688MHz)
• 384fs (16.9344MHz)
s Crystal oscillator circuit built-in
s Infinity-zero detector circuit built-in
s MSB first, rear-packed serial data input format
(≤ 64fs bit clock)
s 8-times oversampling digital filter
• 32 dB stopband attenuation
• ±0.05 dB passband ripple
• −0.34 dB passband correction for 70 kHz LPF
s 3-line microcontroller interface for output mode
and attenuator control settings
s 16 output modes
s Deemphasis filter operation
• 36 dB stopband attenuation
• −0.09 to +0.23 dB deviation
• −0.34 dB passband correction for 70 kHz LPF
s Attenuator
• 8-bit attenuator (linear 256 steps)
• Independent left/right-channel set function
• Soft mute function (approx. 1024/fs mute time)
s Σ∆ 2-channel D/A converter
• 3rd-order noise shaper
• 32fs oversampling
s 44.1 kHz sampling frequency
s 2.7 to 5.5 V operating supply voltage range (4.5 to
5.5 V operating supply voltage range with 768fs
system clock)
s 24-pin SSOP
s Molybdenum-gate CMOS process
PINOUT
MLEN
CKSL
CKO
DVSS
BCKI
DI
DVDD
LRCI
TSTN
LO
AVDDL
LON
1
12
24 MCK
MDT
RSTN
MUTEO
XVSS
XTO
XTI
XVDD
RO
AVDDR
RON
13 AVSS
PACKAGE DIMENSIONS
Unit: mm
24-pin SSOP
10.05 0.20
10.20 0.30
0.7 0.8 0.36 0.10
0.15
+
−
00..105
0.50 0.20
0 10
NIPPON PRECISION CIRCUITS—1
1 page  
SM5876AM
Parameter
Symbol
Condition
Rating
min typ max
Unit
XTI LOW-level input voltage
XTI AC-coupled input voltage
HIGH-level input voltage2
LOW-level input voltage2
HIGH-level output voltage3
LOW-level output voltage3
CKO HIGH-level output voltage
CKO LOW-level output voltage
XTI HIGH-level input current
XTI LOW-level input current
LOW-level input current2
Input leakage current2
VIL1
VINAC
VIH2
VIL2
VOHA
VOLA
VOHC
VOLC
IIH1
IIL1
IIL2
ILH
Clock input
IOH = −0.5 mA
IOL = 0.5 mA
IOH = −0.5 mA
IOL = 0.5 mA
VIN = XVDD
VIN = 0 V
VIN = 0 V
VIN = DVDD
–
0.3XVDD
2.4
–
AVDD − 0.4
–
DVDD − 0.4
–
–
–
–
–
–
–
–
–
–
–
–
–
4
4
4
–
0.3XVDD
–
–
0.5
–
0.4
–
0.4
15
15
15
1.0
V
Vp-p
V
V
V
V
V
V
µA
µA
µA
µA
1. DVDD = AVDD = XVDD = 3 V, CKSL = LOW (384fs), XTI clock input frequency fXTI = 16.9344 MHz, no output load, NPC-standard input data pattern.
2. Pins MLEN, CKSL, BCKI, DI, LRCI, TSTN, MCK, MDT.
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 = AVDDL = AVDDR,
Ta = −40 to 85 °C
3 V operation: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 2.7 to 4.5 V, AVDD = AVDDL = AVDDR,
Ta = −20 to 70 °C, CKSL = LOW (384fs system clock)
System clock (XTI)
Crystal Oscillator
Parameter
Oscillator frequency
Symbol
fOSC
Condition
768fs
384fs
Rating
min typ max
8.0
33.8688
35.6
4.0
16.9344
17.8
Unit
MHz
MHz
External clock input
Parameter
HIGH-level clock pulsewidth
LOW-level clock pulsewidth
Clock pulse cycle
Symbol
tCWH
tCWL
tXI
Condition
768fs
384fs
768fs
384fs
768fs
384fs
Rating
min typ max
13.0 14.75 62.5
26.0 29.5 125
13.0 14.75 62.5
26.0 29.5 125
28.0 29.5 125
56.0 59.0 250
Unit
ns
ns
ns
ns
ns
ns
NIPPON PRECISION CIRCUITS—5
5 Page 
SM5876AM
AC Measurement Circuit and Conditions
Measurement circuit block diagram
Signal
Generator
CKO
(768fs/384fs)
BCK
LRCK(fs)
DATA
Evaluation
Board
Left Channel
L/R Channel
Right Channel Selector
Distortion
Analyzer
fs= 44.1kHz
DATA= 16bit
Measurement conditions
Parameter1
Total harmonic distortion
Output level
Dynamic range
Signal-to-noise ratio
Symbol
THD + N
Vout
DR
S/N
Channel separation
Ch. Sep
1. Pins LO and RO should have an output load of 10 kΩ (min).
10kΩ Input Impedance
NF Corporation 3346A
RMS Measurement
Shibasoku AD725C
3346A left/right-channel selector
switch
AD725C distortion analyzer with
built-in filter
THRU
D-RANGE
THRU
THRU
20 kHz lowpass filter ON
400 Hz highpass filter OFF
20 kHz lowpass filter ON
400 Hz highpass filter OFF
JIS A filter ON
20 kHz lowpass filter ON
400 Hz highpass filter OFF
NIPPON PRECISION CIRCUITS—11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet SM5876.PDF ] | |
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