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PDF SM5842 Data sheet ( Hoja de datos )
| Número de pieza | SM5842 | |
| Descripción | High-Class Audio Multi-function Digital Filter | |
| Fabricantes | Nippon Precision Circuits Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SM5842 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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NIPPON PRECISION CIRCUITS INC.
SM5842AP/APT
High-Class Audio Multi-function Digital Filter
OVERVIEW
The SM5842AP/APT is a multi-function digital filter
IC, fabricated using NPC’s Molybdenum-gate
CMOS process, for digital audio reproduction equip-
ment. It features 8-times oversampling (interpola-
tion), independent left and right-channel digital
deemphasis, and soft muting functions. It accepts 16,
18, 20 or 24-bit input data, and outputs data in 18,
20, 22 or 24-bit format. It operates using either a
384fs or 256fs system clock at sampling frequencies
up to 48 kHz + 10% (384fs SM5842AP, 384/256fs
SM5842APT).
FEATURES
Functions
s L/R 2-channel processing
s 8-times oversampling (interpolation)
• ≤ ±0.00002 dB passband ripple
• ≥ 117 dB stopband attenuation
s Digital deemphasis
• 32/44.1/48 kHz sampling frequency (fs)
• 2-channel independent ON/OFF control
s Soft muting
• 2-channel independent ON/OFF control
s Input data format
• 2s complement, MSB first
- LR alternating, 16/18/20/24-bit serial, trail-
ing data
- LR alternating, 24-bit serial, leading data
- LR simultaneous, 24-bit serial, leading data
s Output data format
• 2s complement, MSB first, LR simultaneous
• 18/20/22/24-bit serial
• BCKO burst (NPC format)
s Dither round-up processing
• ON (dither rounding)/OFF (normal rounding)
control
s 25-bit internal data length
s Jitter-free function for correct operation in the
presence of jitter between the system clock and
LRCI clock
• ON (jitter-free mode)/OFF (sync mode) control
s 256fs/384fs system clock selectable
• 384fs
- 21.2 MHz maximum frequency (at maximum
fs = 55.2 kHz)
• 256fs
- 13 MHz maximum frequency (at maximum
fs = 50.7 kHz, SM5842AP)
- 14.2 MHz maximum frequency (at maximum
fs = 55.2 kHz, SM5842APT)
s Crystal oscillator circuit built-in
s TTL-compatible input/outputs
s 5.0 ± 0.25 V supply
s Molybdenum-gate CMOS process
s 28-pin plastic DIP
Filter Configuration
s Linear phase 3-stage FIR interpolation filter
• 169-tap 1st stage (fs to 2fs)
• 29-tap 2nd stage (2fs to 4fs)
• 17-tap 3rd stage (4fs to 8fs)
s Deemphasis filter
- IIR filter configuration for accurate gain and
phase characteristics
s 26 × 24-bit parallel multiplier/32-bit accumulator
for high precision
s Overflow limiter built-in
APPLICATIONS
s CD players
s DAT players
s PCM systems
PINOUT
DI / INF2N
BCKI
CKSLN
INF1N
IW1N / DIL
XTI
XTO
VSS
CKO
IW2N / DIR
OW1N
OW2N
SYNCN
RSTN
1
14
28 LRCI
DG
BCKO
WCKO
DOL
DOR
VDD
DITHN
MUTEL
MUTER
FSEL2
FSEL1
DEMPL
15 DEMPR
NIPPON PRECISION CIRCUITS—1
1 page  
SM5842AP/APT
SPECIFICATIONS
Absolute Maximum Ratings
VSS = 0 V
Parameter
Supply voltage range
Input voltage range
Storage temperature range
Power dissipation
Soldering temperature
Soldering time
Symbol
VDD
VIN
Tstg
PD
Tsld
tsld
Recommended Operating Conditions
VSS = 0 V
Parameter
Supply voltage range
Operating temperature range
Symbol
VDD
Topr
Condition
SM5842AP
SM5842APT
Rating
−0.3 to 7.0
−0.3 to VDD + 0.3
−40 to 125
550
255
10
Unit
V
V
°C
mW
°C
s
Rating
4.75 to 5.25
−20 to 80
−20 to 70
Unit
V
°C
DC Electrical Characteristics
VDD = 4.75 to 5.25 V, VSS = 0 V, Ta = −20 to 80 °C
Parameter
Current consumption
XTI HIGH-level input voltage
XTI LOW-level input voltage
HIGH-level input voltage2
LOW-level input voltage2
HIGH-level output voltage3
LOW-level output voltage3
XTO HIGH-level output voltage
XTO LOW-level output voltage
XTI HIGH-level input current
XTI LOW-level input current
LOW-level input current2
Input leakage current2
Symbol
IDD
VIH1
VIL1
VIH2
VIL2
VOH1
VOL1
VOH2
VOL2
ILH
ILL1
ILL2
IIH
Condition
VDD = 5.0 V1
IOH = −0.4 mA
IOL = 1.6 mA
IOH = −1.0 mA
IOL = 1.0 mA
VIN = VDD
VIN = 0 V
VIN = 0 V
VIN = VDD
min
–
0.7VDD
–
2.4
–
2.5
–
VDD − 0.5
–
–
–
–
–
Rating
typ
60
–
–
–
–
–
–
–
–
10
10
10
–
max
80
–
0.3VDD
–
0.5
–
0.4
–
0.4
20
20
20
1.0
Unit
mA
V
V
V
V
V
V
V
V
µA
µA
µA
µA
1. fSYS = 256fs = 14.2 MHz (CKSLN = LOW), no output load
2. Pins DI/INF2N, BCKI, CKSLN, INF1N, IW1N/DIL, IW2N/DIR, OW1N, OW2N, SYNCN, RSTN, DEMPR, DEMPL, FSEL1, FSEL2, MUTER, MUTEL,
DITHN, LRCI
3. Pins CKO, DOL, DOR, BCKO, WCKO, DG
NIPPON PRECISION CIRCUITS—5
5 Page 
SM5842AP/APT
Deemphasis filter
Parameter
Passband bandwidth (kHz)
Deviation from ideal characteristic
Attenuation
Phase, θ
32 kHz
0 to 14.5
Sampling frequency (fs)
44.1 kHz
0 to 20.0
≤ ±0.001 dB
0 to 1.5°
Passband response with deemphasis ON (logarithmic frequency axis)
48 kHz
0 to 21.7
0
2
4
6
8
10
10 20
50 100 200
500 1k
2k
Frequency (Hz)
32kHz
Phase
0
-20
44.1kHz
48kHz
-40
-60
32kHz
44.1kHz
48kHz
5k 10k
20k [Hz]
NIPPON PRECISION CIRCUITS—11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet SM5842.PDF ] | |
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