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PDF SM6451AV Data sheet ( Hoja de datos )
| Número de pieza | SM6451AV | |
| Descripción | Audio Variable Volume IC | |
| Fabricantes | Nippon Precision Circuits Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SM6451AV (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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NIPPON PRECISION CIRCUITS INC.
SM6451AV
Audio Variable Volume IC
OVERVIEW
The SM6451AV is a 3-wire serial-controlled elec-
tronic variable volume IC for audio applications. It
provides electronic volume control for a stereo sys-
tem (left and right channels), and independent chan-
nel attenuation and muting, with greatly enhanced
digital zip noise suppression. The chip address func-
tion allows up to four SM6451AV devices to be con-
nected and individually controlled over the 3-wire
control interface from a single CPU. It is available in
16-pin VSOP packages.
FEATURES
s Stereo inputs and outputs
s Attenuation function
• 2-channel independent control
• 1.0 dB/step over 80 steps
• 0 to −80 dB range
s Mute function
s 3-wire serial data control (MDT, MCK, MLEN)
s Chip addressing (up to 4 devices can be connected
in parallel)
s Low noise
• ≤ 0.002% THD + noise
• 10 µVrms residual noise
s 5 V single power supply
s Silicon-gate CMOS process
PINOUT
(Top View)
RSTN
ADRS1
ADRS2
DVDD
LOUT
LIN
AVDD
VRL
1
8
16 MDT
MCK
MLEN
DVSS
ROUT
RIN
AVSS
9 VRR
PACKAGE DIMENSIONS
(Unit: mm)
16 pin VSOP
APPLICATIONS
s Audio equipment
ORDERING INFORMATION
Device
SM6451AV
Package
16-pin VSOP
0.275TYP
5.1 0.2
0.65
0.10
0.22+-
0.10
0.05
0.12 M
0.15+-00..105
0 10
0.5 0.2
NIPPON PRECISION CIRCUITS—1
1 page  
SM6451AV
AC Analog Characteristics
VDD = 5.0 V, 1.2 Vrms amplitude, 1 kHz input frequency, 100 kΩ output load resistance, Ta = 25 °C,
AC-coupled inputs
Analog inputs (LIN, RIN)
Parameter
Input reference amplitude
Input resistance
Input clipping voltage
Symbol
VAI
RIN
VCLP
Condition
THD + N = 1%, ATT = 0 dB
min
–
40
–
Rating
typ
1.2
50
1.75
max
–
60
–
Unit
Vrms
kΩ
Vrms
Analog outputs (LOUT, ROUT)
Parameter
Residual noise voltage
Signal-to-noise ratio
Total harmonic distortion + noise
Gain control range
Step size
Attenuation error (1k to 20kHz)
Absolute attenuation (1 kHz)
Mute attenuation (1 kHz)
Channel crosstalk
Frequency response
Quiescent output zip noise voltage
(while ATT value adjusting)
Minimum driver load resistance
Symbol
VNS
SNR
THD + N
RCNT
Step
ERR1
ERR2
AT0
AT2
AT4
AT6
AT8
Mute
CT
FR
NJ
RML
Condition
Input signal: 0 Vrms,
A-weight filter, 0 dBr = 1.2
Vrms, ATT = 0 dB
ATT = 0 dB, 20 kHz
lowpass filter
0 to −60 dB
−61 to −80 dB
ATT = 0 dB
ATT = −20 dB
ATT = −40 dB
ATT = −60 dB
ATT = −80 dB
ATT = Mute
ATT = 0 dB
ATT = 0 dB, f = 200 kHz
0 Vrms input
ATT = 0 dB, THD + N = 1%
min
–
95
–
−80
0.8
−2
−5
–
–
–
–
–
−88
−105
–
–
–
Rating
typ
10
100
0.0017
–
1
–
–
−0.1
−20.1
−40.3
−60.5
−83.0
−92
−112
−5
–
6
max
20
–
0.0025
0
1.5
1
0
–
–
–
–
–
–
–
–
3
10
Unit
µVrms
dBr
%
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mV
kΩ
Reference voltage (VRL, VRR)
Parameter
Reference voltage output
Symbol
VREF
Condition
min
0.45VDD
Rating
typ
0.5VDD
max
0.55VDD
Unit
V
NIPPON PRECISION CIRCUITS—5
5 Page 
SM6451AV
TYPICAL APPLICATIONS
Connection Guidelines
Decoupling capacitors of approximately 10 µF should be connected from AVDD, VRL, VRR to AVSS, and
from DVDD to DVSS.
In addition, approximately 0.01 µF capacitors should also be connected from AVDD, VRL, VRR to AVSS,
and from DVDD to DVSS to suppress digital switch noise.
An approximately 0.001 µF capacitor connected from RSTN to DVSS will force a system reset when power
is applied.
Connection 1 (to DAC)
DVDD AVDD1 to 4
LOA
SM5864
LOBN
ROA
ROBN
DVSS AVSS1 to 4
Analog L.P.F.
Analog L.P.F.
CPU
+ 5V
DVDD AVDD
LIN LOUT
RIN ROUT
SM6451
ADRS1
DVSS
ADRS2
AVSS
MDT MCK MLEN
for Front
L ch OUT
R ch OUT
MDT MCK MLEN
ADRS1
AVDD
ADRS2
DVDD
SM6451
LIN LOUT
RIN
AVSS
ROUT
DVSS
for Rear
L ch OUT
R ch OUT
NIPPON PRECISION CIRCUITS—11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SM6451AV.PDF ] | |
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