SM5877AM
NIPPON PRECISION CIRCUITS INC.
3rd-order
Σ∆
, 2-channel D/A Converter
OVERVIEW
The SM5877AM is a 3rd-order
Σ∆
, 2-channel D/A
converter LSI for digital audio reproduction equip-
ment. It also incorporates an 8-times oversampling
digital filter and analog, post-converter lowpass fil-
ters.
The SM5877AM has digital deemphasis filter, atten-
uator, and soft mute circuits built-in. Double-speed
operation and low-voltage operation are also sup-
ported.
The SM5877AM operates from a 2.7 to 5.5 V supply,
and is available in 24-pin SSOPs.
PINOUT
MUTE
DEEM
CKO
DVSS
BCKI
DI
DVDD
LRCI
TSTN
1
2
3
4
5
6
24
23
22
21
20
19
ATCK
MODE
RSTN
DS
XVSS
XTO
XTI
XVDD
MUTEO
AVDDR
RO
AVSS
SM5877AM
7
8
9
10
11
12
18
17
16
15
14
13
FEATURES
s
s
TO1
AVDDL
s
s
s
s
s
s
s
s
s
s
s
s
2.7 to 5.5 V operating supply voltage range
4.5 to 5.5 V operating supply voltage range for
double-speed mode
44.1 kHz sampling frequency
Normal (384fs) and double-speed (192fs),
16.9344 MHz system clock
16.9344 MHz crystal oscillator circuits built-in
16-bit, 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
Deemphasis filter operation
• 36 dB stopband attenuation
•
−
0.09 to +0.23 dB deviation from ideal deem-
phasis filter characteristics
Attenuator
• 6-bit attenuator (64 steps)
• Soft mute function when MODE is HIGH
(approx. 1024/fs total muting time)
Built-in infinity-zero detector
Σ∆
2-channel D/A converter
• 3rd-order noise shaper
• 32fs oversampling (16fs for double-speed
mode)
3rd-order analog, post-converter lowpass filters
built-in (165 kHz cut-off frequency)
24-pin SSOP
Molybdenum-gate CMOS process
LO
PACKAGE DIMENSIONS
Unit: mm
24-pin SSOP
5.40 0.20
7.80 0.30
10.05 0.20
10.20 0.30
1.80 0.10
0.15
−
0.05
+
0.1
0.10 0.10
2.10MAX
0.7
0.8
0.36 0.10
0.50 0.20
0 10
Package Marking
S M 5 8 7 7 A M
NIPPON PRECISION CIRCUITS—1
NPC [ NIPPON PRECISION CIRCUITS INC ]
