SM5879AV
3rd-order Σ∆, 2-channel D/A Converter
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
PINOUT (TOP VIEW)
The SM5879AV is a 3rd-order ∑∆, two-channel D/A
convertor LSI for digital audio reproduction equip-
ment. This device incorporate NPC's molybdenum-
gate CMOS technology and incorporates an 8-times
oversampling digital filter and analog 3rd-order ∑∆
post-converter low-pass filters.
1
24
LRCI
DVDD
BCKI
TEST
P / M
DI
AVDDR
RO
BB2 / BBON
BB1 / MDT
DEEM / MCK
MUTE / MLEN
XVDD
The SM5879AV also incorporates built-in digital
bass boost and deemphasis filters, an attenuator, and
soft mute function. Low-voltage operation is also
supported.
AVSSR
TO1
AVSSL
LO
XTO
XTI
This device features a compact 24-pin VSOP pack-
age and a D/A converter that provides both compact
size and low power consumption.
AVDDL
MUTEO
DVSS
XVSS
CKO
12
13
FEATURES
■ 2.7 to 3.3 V operating supply voltage
■ 44.1 kHz sampling frequency
■ 16.9344 MHz (384fs) system clock
■ Built-in crystal oscillator circuit
■ 16-bit, MSB first, rear-packed serial data input
format (≤ 64 fs bit clock)
PACKAGE DIMENSIONS
Unit: mm
24-pin VSOP
■ 8-times oversampling digital filter
• 32 dB stopband attenuation
• +0.05 to -0.05 dB passband ripple
■ Deemphasis filter operation
• 36 dB stopband attenuation
+ 0.05
0.15 − 0.02
7.8 ± 0.1
• -0.09 to +0.23 dB deviation from ideal deem-
phasis filter characteristics
■ Attenuator
• 7-bit attenuator (128 steps) set by microcontrol-
ler
■ Soft mute function set by parallel setting
• (approximately 1024/fs total muting time)
■ Mono setting
• Left or right channel mono selectable by micro-
controller
0 to 10
+0.1
−0.05
0.22
0.65
■ Built-in infinity-zero detection circuit
■ ∑∆, two-channel D/A converter
• 3rd-order noise shaper
ORDERING INFOMATION
• 32fs oversampling
Device
Package
■ Built-in 3rd-order post-converter low-pass filters
■ 24-pin VSOP package
SM5879AV
24pin VSOP
■ Molybdenum-gate CMOS process
NIPPON PRECISION CIRCUITS—1