SM5950AM Datasheet, PDF (1/20 Pages) Nippon Precision Circuits Inc – Asynchronous Sample Rate Converter

SM5950AM
Asynchronous Sample Rate Converter
OVERVIEW
The SM5950AM is a digital audio signal asynchronous sample rate converter LSI. It supports 16/20/24-bit
word-length input/output interface data. It also features a built-in digital deemphasis filter and direct mute
functions.
FEATURES
Functions
I L/R 2-channel (stereo) processing
I Input sample rate range: 20kHz to 100kHz
I Output sample rate range: 30kHz to 50kHz
I Operating sample rate conversion ratio (fso/fsi)^*1
: 0.45 to 2.205 selectable
*1_{: fsi = input sample rate}
fso = output sample rate
I Asynchronous input and output clock timing
I System clock input
• Input system clock: 1fsi (LRCI)
• Output system clock: 512fso (SCKO input)
I Deemphasis filter function
• IIR-type filter
• fsi = 44.1kHz, 48kHz, 32kHz compatible
I Direct mute function
I Through mode operation
• Direct connection from input to output
I Output data clocks (LRCO, BCKO)
• Slave mode: external inputs
• Master mode: derived from the output system
clock (SCKO)
I Computation round-off processing
• Normal round-off
I 5V tolerant input pins for direct connection to 5V
operation devices
I 3.3V single supply
I Package: 24-pin SSOP
PINOUT
(Top view)
LRCI 1
BCKI 2
DI 3
TMOD0 4
RSTN 5
VDD 6
IISI 7
IMOD0 8
IMOD1 9
DEEM 10
FS0 11
FS1 12
24 LRCO
23 BCKO
22 DOUT
21 SLAVE
20 SCKO
19 VSS
18 IISO
17 OMOD0
16 OMOD1
15 TMOD1
14 THROU
13 DMUTE
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.23g
10.20 ± 0.30
10.05 ± 0.20
0.15
+
−
0.10
0.05
ORDERING INFORMATION
Device
SM5950AM
Package
24-pin SSOP
0.8
0.36 ± 0.10 _{0.12 M}
0.10
0 to 10
Note: Dimensions without tolerance are reference values.
NIPPON PRECISION CIRCUITS INC.—1