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SM5843A Datasheet, PDF (1/24 Pages) Nippon Precision Circuits Inc – Audio Multi-function Digital Filter | |||
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NIPPON PRECISION CIRCUITS INC.
SM5843AÃ1
Audio Multi-function Digital Filter
OVERVIEW
The SM5843AÃ1 is a multi-function digital ï¬lter IC,
fabricated using NPCâs Molybdenum-gate CMOS
process, for digital audio reproduction equipment. It
features 8-times oversampling (interpolation), digital
deemphasis and soft muting functions. It accepts 16,
18, or 20-bit input data, and outputs data in 18 or 20-
bit format. It operates using either a 384fs or 256fs
system clock.
FEATURES
s Filter conï¬guration (2-channel processing)
⢠8-times oversampling (interpolation)
- 3-stage FIR conï¬guration
⢠Deemphasis ï¬lter
- IIR ï¬lter conï¬guration for correct gain and
phase characteristics
- 2-channel independent ON/OFF control
- 32/44.1/48 kHz sampling frequency (fs)
⢠21 à 22-bit parallel multiplier/25-bit
accumulator for high precision
⢠Overï¬ow limiter
s 2 oversampling ï¬lter characteristics
⢠Sharp roll-off characteristic (response 1)
- ⤠±0.00005 dB passband ripple (0 to
0.4535fs)
- ⥠110 dB stopband attenuation (0.5465fs to
7.4535fs)
⢠Slow roll-off characteristic (response 2)
- ⤠±0.00003 dB passband ripple (0 to 0.235fs)
- ⥠77 dB stopband attenuation (0.745fs to
7.255fs)
s Soft muting
s Digital attenuator
s Input data format
⢠2s complement, MSB ï¬rst
- LR alternating, 16/18/20-bit serial, trailing
data
- LR alternating, 20-bit serial, leading data
- LR simultaneous, 20-bit serial, leading data
s Output data format
⢠2s complement, MSB ï¬rst, LR simultaneous
⢠18/20-bit serial
⢠BCKO burst (NPC format)
s Dither processing ON/OFF control
s Jitter-free/Sync mode selectable
s 256fs/384fs system clock selectable
⢠21.2/14.2MHz
maximum
frequency
(384fs/256fs)
s 5 V supply
s Crystal oscillator circuit built-in
s TTL-compatible input/outputs
s 28-pin plastic DIP and SOP
s Molybdenum-gate CMOS
APPLICATIONS
s CD players
s DAT players
s PCM systems
ORDERING INFOMATION
Device
SM5843AP1
SM5843AS1
Package
28pin DIP
28pin SOP
NIPPON PRECISION CIRCUITSâ1
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