OVERVIEW

The SM5876AM is a 3rd-order Σ∆, 2-channel D/A converter LSI for CD-ROM digital audio reproduction equipment. It incorporates an 8-times oversampling digital filter, deemphasis filter, attenuator, and soft mute circuits built-in., using NPC’s Molybdenum-gate CMOS technology.

FEATURES

■ System clock

• 768fs (33.8688MHz)

• 384fs (16.9344MHz)

■ Crystal oscillator circuit built-in

■ Infinity-zero detector circuit built-in

■ MSB first, rear-packed serial data input format (≤ 64fs bit clock)

■ 8-times oversampling digital filter

• 32 dB stopband attenuation

• ±0.05 dB passband ripple

• −0.34 dB passband correction for 70 kHz LPF

■ 3-line microcontroller interface for output mode and attenuator control settings

■ 16 output modes

■ Deemphasis filter operation

• 36 dB stopband attenuation

• −0.09 to +0.23 dB deviation

• −0.34 dB passband correction for 70 kHz LPF

■ Attenuator

• 8-bit attenuator (linear 256 steps)

• Independent left/right-channel set function

• Soft mute function (approx. 1024/fs mute time)

■ Σ∆ 2-channel D/A converter

• 3rd-order noise shaper

• 32fs oversampling

■ 44.1 kHz sampling frequency

■ 2.7 to 5.5 V operating supply voltage range (4.5 to 5.5 V operating supply voltage range with 768fs system clock)

■ 24-pin SSOP

■ Molybdenum-gate CMOS process