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SM5842AP 数据表(PDF) 1 Page - Nippon Precision Circuits Inc |
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SM5842AP 数据表(HTML) 1 Page - Nippon Precision Circuits Inc |
1 / 23 page SM5842AP/APT NIPPON PRECISION CIRCUITS—1 NIPPON PRECISION CIRCUITS INC. 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 MUTEL INF1N IW2N / DIR BCKI DI / INF2N LRCI XTI DOL XTO BCKO 1 15 14 CKSLN VSS RSTN CKO OW1N OW2N SYNCN WCKO DOR IW1N / DIL VDD DITHN DG MUTER FSEL2 FSEL1 DEMPL DEMPR 28 |
类似零件编号 - SM5842AP |
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类似说明 - SM5842AP |
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