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SM5846AP

Nippon Precision Circuits Inc
Part Number SM5846AP
Manufacturer Nippon Precision Circuits Inc
Description Multi-function Digital Filter
Published Apr 7, 2005
Detailed Description SM5846AP NIPPON PRECISION CIRCUITS INC. Multi-function Digital Filter Audio ICs OVERVIEW The SM5846AP is a multi-func...
Datasheet PDF File SM5846AP PDF File

SM5846AP
SM5846AP

Overview
SM5846AP NIPPON PRECISION CIRCUITS INC.
Multi-function Digital Filter Audio ICs OVERVIEW The SM5846AP is a multi-function digital filter that incorporates 4/8 times oversampling digital audio signal reproduction, digital deemphasis, digital attenuation and soft mute functions.
The I/O interface allows serial data transmission of 16/20/24/32bit input data and 20/24-bit output data.
Filter Construction s FEATURES Functions s s s s s s s s s s s s s s s s s s 8-times oversampling (interpolation) Switchable 8/4 times oversampling output Two master clock frequencies (refer to Clock Functions) • 384fs/512fs (normal-speed sampling) • 192fs/256fs (high-speed sampling) Digital deemphasis • Compatible with 32/44.
1/48 kHz (normalspeed) and 64/88.
2/96 kHz (high-speed) input sampling frequencies • ON/OFF control Digital attenuator • 128-step attenuation using linear 7-bit data setting Soft muting • 1016/fs (normal-speed sampling) • 2032/fs (high-speed sampling) Output data round-off operation (normal round-off or rectangular distribution dither round-off) Selectable LR clock polarity Microprocessor controllable Input data format • 2s complement, MSB first, alternating L/R serial • 16/20/24/32-bit data selectable Output data format • 2s complement, MSB first, simultaneous L/R serial • 20/24-bit data selectable.
24-bit internal data processing Jitter-free mode/synchronous mode selectable Crystal oscillator circuit built-in TTL-compatible outputs Molybdenum-gate CMOS s Interpolation filter (linear 3-stage FIR filter) • Normal-speed sampling mode 1st stage (fs to 2fs) 121st order 2nd stage (2fs to 4fs) 21st order 3rd stage (4fs to 8fs) 13th order • High-speed sampling mode: 1st stage (fs to 2fs) 177th order 2nd stage (2fs to 4fs) 29th order 3rd stage (4fs to 8fs) 17th order Deemphasis filter (IIR filter) Arithmetic units • 25× 24-bit parallel adder • 32-bit accumulator Overflow limiter built-in Applications s Digital audio equipment PINOUT (TOP VIEW) DIN 1 28 LRCI 27 MDS 2...


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