NJU8754 查看數據表（PDF） - Japan Radio Corporation
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NJU8754 Datasheet PDF : 6 Pages
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NJU3857554
ELECTRICAL CHARACTERISTICS
PARAMETER
VDD,VDDO Supply Voltage
Input Impedance
Voltage Gain
Output Power Efficiency
Output THD
Output Power
S/N
Operating Current (Standby)
Operating Current
(No signal input)
Input Voltage
Input Leakage Current
SYMBOL
VDD
ZIN
AV
Eeff
THD
Po
SN
IST
IDD
VIH
VIL
ILK
(Ta=25°C, VDD=VDDO= 3.6V, VSS= 0V, Input Signal=1kHz,
Input Signal Level=200mVrms, Frequency Band=20Hz~20kHz,
Load Impedance=8Ω, 2nd-order 34kHz LC Filter(Q=0.85))
CONDITIONS
MIN TYP MAX UNIT Note
2.7
3.6 5.25
V
IN pin
-
20
-
kΩ
-
23
-
dB
Output THD=10%
80
83
-
%
4
VDD=VDDO=5.0V, Po=600mW
VDD=VDDO=3.6V, Po=300mW
VDD=VDDO=5.0V
Output THD=10%
VDD=VDDO=3.6V
Output THD=10%
0.05 0.08
0.07 0.1
%
1.2
W
0.6
A weight
75
80
-
dB
-
-
1
µA
VDD=VDDO=5.0V
No Filter, No Load
VDD=VDDO=3.6V
No Filter, No Load
4
6
mA
2.5
5
MUTE, STBY pins
MUTE, STBY pins
MUTE, STBY pins
0.7VDD
-
VDD
V
0
-
0.3VDD V
-
-
±0.1 µA
Note 5) Test system of the output THD and S/N
The output THD and S/N 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
NJU8754
2nd-order
LC LPF
Filter
20kHz
(AES17)
THD
Measuring
Apparatus
NJU8754 Test Board
Audio Analyzer
Figure 1. Output THD and S/N 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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