Σ
DECO SM5865BM
NIPPON PRECISION CIRCUITS INC.
D/A Converter for Digital Audio
OVERVIEW
The SM5865BM is a 24-bit input D/A converter for
digital audio equipment. It comprises newly devel-
oped DEM (dynamic element matching) circuits,
3rd-order
Σ∆
noise shaper and 23-level quantizer to
control wide-band residual quantization noise in the
signal band, making it ideal for application with
high-frequency sampling formats. Also, the order of
the required final-stage analog lowpass filter can be
reduced, compared to filters for available devices,
enhancing output tone quality. The output stage
employs complementary outputs for high-accuracy
analog signals, with appropriate lowpass filtering of
the output signal.
A single SM5865BM IC can be used in combination
with an 8-times oversampling digital filter for con-
version for a single audio channel.
PINOUT
(Top view)
DVSS
DI
BCKI
WCKI
IWSL
RSTN
TSTN
TO
DVDD
CKI
CKDVN
CVSS
1
24
AVSSA
RAP
IOUTA
IOUTAN
RAN
AVDDA
AVDDB
RBP
IOUTB
IOUTBN
RBN
S M 5 8 6 5 BM
12
13
FEATURES
s
s
AVSSB
s
s
s
s
s
s
Single-channel D/A converter built-in
High performance
• 0.0004% total harmonic distortion and noise
• 114 dB dynamic range
• 117 dB signal-to-noise ratio
Σ∆
D/A converter
• 3rd-order noise shaper
• 23-level quantizer
Input data format
• 20 or 24-bit word length
• MSB first, right-justified format
• 8 or 4 times oversampling at fs = 16/32/44.1/48/
88.2/96/176.4/192 kHz
System clock frequency
• 192/256/384/512/768/1024 fs
Single 5 V operating supply voltage
24-pin SSOP package
Molybdenum-gate CMOS process
PACKAGE DIMENSIONS
(Unit: mm)
24-pin SSOP
5.40 0.20
7.80 0.30
10.05 0.20
10.20 0.30
0.15
−
0.05
+
0.1
ORDERING INFORMATION
0.10 0.10
+0.20
1.90
−0.10
D e vice
SM5865BM
P ackag e
24-pin SSOP
0.8
0.36 0.10
0.10
1.80
0.12
M
0.50 0.20
0 10
NIPPON PRECISION CIRCUITS—1
NPC [ NIPPON PRECISION CIRCUITS INC ]
