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Número de pieza
SM5844

componentes Descripción

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page
26 Pages

File Size
255.9 kB

Fabricante
NPC
Nippon Precision Circuits  NPC

OVERVIEW
The SM5844AF is a digital audio signal, asynchronous sample rate converter LSI. It reads 16 or 20-bit word length input data, and writes 16, 18, or 20-bit word length output data. It also features a built-in digital deemphasis filter and digital attenuator.
The SM5844AF operates from a 5 V supply, and is available in 44-pin QFPs.


FEATURES
Functions
■ Left/right-channel processing (stereo)
■ Input sample rate (fsi) ranges
    • 24 to 48 kHz (256fsi mode)
    • 27 to 55 kHz (384fsi mode)
■ Output sample rate (fso) range
    • 20 to 100 kHz
■ Sample rate conversion ratio (fso/fsi)
    • 0.5 to 2.0 times
■ Asynchronous input and output timing (clock inputs)
■ System clock inputs (input and output clocks independent)
    • 256fsi or 384fsi input system clock
    • 256fso or 384fso output system clock
■ Deemphasis filter
    • IIR-type filter
    • 44.1, 48 or 32 kHz
■ Digital attenuator
    • 11-bit data for 1025 levels
    • Smooth, incremental attenuation change
    • +12 dB gain shift function
■ Direct mute function
■ Through mode operation
    • Input to output direct
■ Output data clocks (LRCO, BCKO)
    • External input (slave mode)
    • Output system clock generated internally (master mode)
■ CMOS-level input/outputs
■ 5 V (standard) single supply
■ 44-pin QFP
■ Molybdenum-gate CMOS process


APPLICATIONS
■ Digital audio equipment, sample rate conversion (audiovisual amplifiers, CD-R, DAT, MD and 8 mm VTRs)
■ Commercial recording/editing equipment, sample rate conversion
■ Input data jitter elimination

Page Link's: 1  2  3  4  5  6  7  8  9  10  More Pages 

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