SM5879AV
NIPPON PRECISION CIRCUITS INC.
3rd-order
Σ∆
, 2-channel D/A Converter
OVERVIEW
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.
The SM5879AV also incorporates built-in digital
bass boost and deemphasis filters, an attenuator, and
soft mute function. Low-voltage operation is also
supported.
This device features a compact 24-pin VSOP pack-
age and a D/A converter that provides both compact
size and low power consumption.
PINOUT
(TOP VIEW)
DVDD
TEST
P/M
AVDDR
RO
AVSSR
TO1
AVSSL
LO
AVDDL
MUTEO
DVSS
1
24
LRCI
BCKI
DI
BB2 / BBON
BB1 / MDT
DEEM / MCK
MUTE / MLEN
XVDD
XTO
XTI
XVSS
CKO
S M 5 8 7 9 AV
12
13
FEATURES
s
s
s
s
s
s
s
s
s
0.65
0.22
+0.1
−0.05
s
s
ORDERING INFOMATION
Device
SM5879AV
Package
24pin VSOP
s
s
s
NIPPON PRECISION CIRCUITS—1
0.1
±
0.1
s
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)
8-times oversampling digital filter
• 32 dB stopband attenuation
• +0.05 to -0.05 dB passband ripple
Deemphasis filter operation
• 36 dB stopband attenuation
• -0.09 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
Built-in infinity-zero detection circuit
∑∆
, two-channel D/A converter
• 3rd-order noise shaper
• 32fs oversampling
Built-in 3rd-order post-converter low-pass filters
24-pin VSOP package
Molybdenum-gate CMOS process
PACKAGE DIMENSIONS
Unit: mm
24-pin VSOP
+
0.05
0.15
−
0.02
7.8
±
0.1
5.6
±
0.1
7.6
±
0.2
1.25
+0.2
−0.1
0 to 10
0.5
±
0.2
NPC [ NIPPON PRECISION CIRCUITS INC ]
