OVERVIEW

The SM5819AF is a 6-channel DSD data (64fs) to 4fs, 2fs or fs PCM data converter. During conversion, decimation filtering is performed using a filter with selectable fixed coefficients (3 sets). Also, DSD inputs and PCM outputs are available for use in master/slave clock mode operation, in a wide range of system configurations, making it easy to construct a multi-channel DSD/PCM reproduction system.

FEATURES

■ 512fs (22.5792MHz, fs = 44.1kHz), 1:2 to 2:1 duty master clock

■ DSD input and PCM output clock master/slave switching

■ 3-system external data input (3-wire format), PCM output data/BCK/LRCK external input and internal filter output switching (BCK and LRCK are common to all 3 external PCM data inputs)

■ Decimation filter coefficients • Fixed coefficients: 4fs-1/2fs-1/fs-1

■ PCM output mute operation

■ PCM output format: [MSB-first left-justified 32- bit] or [IIS 32-bit] (IIS 32-bit output bit clock frequency = 64 × word clock frequency)

■ FIR filter coefficients • 64fs → 4fs/2fs/fs: 480th-order (6-channel) • ROM coefficients: 24 valid data bits (4-bit MSB extension at 4fs, 5-bit MSB extension at 2fs/fs)

■ + 6dB DSD gain switching function

■ External/Internal system clock output switching

■ 3.3V (3.0 to 3.6V) and 2.5V (2.3 to 2.7V) power supplies

■ − 40 to 85°C operating temperature range

■ 48-pin QFP package

APPLICATIONS

■ Multi-channel SA-CD players

■ SA-CD-compatible AV amplifiers