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SM5842 Fiches technique (PDF) - Nippon Precision Circuits Inc

SM5842 Datasheet PDF - Nippon Precision Circuits Inc
No de pièce SM5842
Télécharger  SM5842 Télécharger

Taille du fichier   201.07 Kbytes
Page   23 Pages
Fabricant  NPC [Nippon Precision Circuits Inc]
Site Internet  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc
Description High-Class Audio Multi-function Digital Filter

SM5842 Datasheet (PDF)

Go To PDF Page Télécharger Fiches technique
SM5842 Datasheet PDF - Nippon Precision Circuits Inc

No de pièce SM5842
Télécharger  SM5842 Click to download

Taille du fichier   201.07 Kbytes
Page   23 Pages
Fabricant  NPC [Nippon Precision Circuits Inc]
Site Internet  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc
Description High-Class Audio Multi-function Digital Filter

SM5842 Fiches technique (HTML) - Nippon Precision Circuits Inc

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SM5842 Détails du produit

OVERVIEW
The SM5842AP/APT is a multi-function digital filter IC, fabricated using NPC’s Molybdenum-gate CMOS process, for digital audio reproduction equipment. It features 8-times oversampling (interpolation), 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
■ L/R 2-channel processing
■ 8-times oversampling (interpolation)
   • ≤ ±0.00002 dB passband ripple
   • ≥ 117 dB stopband attenuation
■ Digital deemphasis
   • 32/44.1/48 kHz sampling frequency (fs)
   • 2-channel independent ON/OFF control
■ Soft muting
   • 2-channel independent ON/OFF control
■ Input data format
   • 2s complement, MSB first
      - LR alternating, 16/18/20/24-bit serial, trailing data
      - LR alternating, 24-bit serial, leading data
      - LR simultaneous, 24-bit serial, leading data
■ Output data format
• 2s complement, MSB first, LR simultaneous
• 18/20/22/24-bit serial
• BCKO burst (NPC format)
■ Dither round-up processing
   • ON (dither rounding)/OFF (normal rounding) control
■ 25-bit internal data length
■ 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
■ 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)
■ Crystal oscillator circuit built-in
■ TTL-compatible input/outputs
■ 5.0 ± 0.25 V supply
■ Molybdenum-gate CMOS process
■ 28-pin plastic DIP Filter Configuration
■ 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)
■ Deemphasis filter
   - IIR filter configuration for accurate gain and phase characteristics
■ 26 × 24-bit parallel multiplier/32-bit accumulator for high precision
■ Overflow limiter built-in

APPLICATIONS
■ CD players
■ DAT players
■ PCM systems




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