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SM5847A
High-fidelity Digital Audio, Multi-function Digital Filter
The SM5847A is a 4/8-times oversampling (inter-polation), 2-channel, linear-phase FIR, multi-function digital filter for digital audio reproduction equipment. It features independent left and right-channel digital deemphasis filters and soft muting function. The input/output interface supports input data in 16/18/20/24-bit words, and output data in 18/20/22/24-bit words in either 4-times or 8-times oversampling selectable output mode. The internal system clock operates at either 192fs or 256fs selectable speed (where fs is the audio sampling frequency). Plus, the divide-by 1, 2, or 4 counter settings means that external clocks of 768fs/384fs/192fs (192fs input) and 1024fs/512fs/256fs (256fs input) are supported. The SM5847A operates from a single 3 to 5 V supply, and is available in 44-pin QFP packages.
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4-times/8-times oversampling (interpolation)
<8-times interpolation filter>
3-stage linear-phase FIR configuration
≤±0.00002dB passband ripple
≥117dB stopband attenuation
<4-times interpolation filter>
2-stage linear-phase FIR configuration
≤±0.00002dB passband ripple
≥116dB stopband attenuation |
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Digital deemphasis
IIR filter configuration
fs=32kHz, 44.1kHz, 48kHz
2-channel independent ON/OFF control |
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26 x 24-bit parallel multiplier/32-bit accumulator |
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Overflow limiter |
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Dither round-off ON/OFF selectable |
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25-bit internal data word length |
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Internal system clock:192fs/256fs selectable |
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Package:QFP-44-100100-1 |
·DVD audio players
·DVD players
·CD players
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Datasheet(PDF 239KB)
