NJU8755 データシートの表示（PDF） - Japan Radio Corporation
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NJU8755 Datasheet PDF : 6 Pages
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NJU385755
! ELECTRICAL CHARACTERISTICS
PARAMETER
VDD,VDDP,VDDN Supply Voltage
Input Impedance
Voltage Gain
Output Power Efficiency
Output THD
Output Power
S/N
Dynamic Range
Channel Separation
Output Level Difference
Between L- and R- channels
Maximum Mute Attenuation
Operating Current (Standby)
Operating Current
(No signal input)
Input Voltage
Input Leakage Current
(Ta=25°C, VDD= VDDL= VDDR=5.0V, VSS=VSSL=VSSR=0V, Input Signal=1kHz,
Input Signal Level=200mVrms, Frequency Band=20Hz~20kHz,
Load Impedance=8Ω, 2nd-order 34kHz LC Filter(Q=0.85))
SYMBOL CONDITIONS
MIN
TYP
MAX
UNIT Note
VDD
2.7
ZIN
INL, INR pins
-
AV
-
Eeff Output THD=10%
80
THD Po=0.6W
-
Po Output THD=10%
-
SN
A weight
-
Drange A weight
-
Echn EIAJ(1kHz)
60
5.0
5.25
V
20
-
kΩ
23
-
dB
-
-
%
0.05
0.08
%
5
1.2
-
W/ch
80
-
dB
5
83
-
dB
5
-
-
dB
CHD
-
-
3
dB
MAT
90
-
-
dB
IST
IDD
No Filter
No Load
-
-
1
µA
-
7.5
10
mA
VIH
MUTE, STBY pins 0.7VDD
-
VDD
V
VIL
MUTE, STBY pins
0
-
0.3VDD
V
ILK
MUTE, STBY pins
-
-
±1.0
µA
Note 5) Test system of the output THD, S/N and Dynamic Range
The output THD, S/N and dynamic range are tested in the system shown in Figure1, where a 2nd-order
LC LPF and another filter incorporated in an audio analyzer are used.
Input Signal
NJU8755
2nd-order
LC LPF
Filter
20kHz
(AES17)
THD
Measuring
Apparatus
NJU8755 Test Board
Audio Analyzer
Figure 1. Output THD, S/N and Dynamic Range Test System
2nd-order LPF
Filters
: fc=34kHz / Refer to “Typical Application Circuit”.
: 22Hz HPF + 20kHz LPF(AES17)
(with the A-Weight filter for S/N and Dynamic-range tests)
Ver.2003-03-12
-5-
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