NJU7907A
Monaural Microphone Amplifier
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJU7907A is a monaural microphone amplifier IC
including regulator for microphone capcel, pre-amplifier and line
amplifier.
The NJU7907A features low consumption current, wide
dynamic range, wide operating voltage range, wide operating
temperature and urtla small and thin package.
It is suitable for microphone module, headset for conference
system, automotive microphone for eCall, and any portable
applications.
NJU7907AUC4
NJU7907ARB2
■ FEATURES
● Operating Voltage
● Low Consumption Current
● Wide Dynamic Range
● Wide Operating Temperature
● CMOS Technology
● Package Outline
4.5 to 16V
EPFFP10-C4, MSOP10(TVSP10)
■ BLOCK DIAGRAM
NF
V S=8V
V+
RL
SIGOUT
Iref
Gen
LINEOUT
PREIN
GND
MIC
MIC
PREOUT LINEIN BIAS
AmpIN
CCUP
RBIAS
Ver.1.1E
FB
RFB1
RFB2
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NJU7907A
■ ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
+
Supply Voltage
V
Power Dissipation
PD
Maximum Input Voltage
RATING
UNIT
18
340(EPFFP10-C4) / 470(MSOP10)
V
NOTE: EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
mW
Vimax
0.3
Vrms
Operating Temperature Range
Topr
-40 to +85
C
Storage Temperature Range
Tstg
-40 to +125
C
■ ELECTRICAL CHARACTERISTICS (Ta=25°C, VS=8V, GV=37.8dB, f=1kHz unless otherwise specified)
♦DC CHARACTERISTICS (Rg=0, RL=680 unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
4.5
8.0
16.0
V
Operating Voltage
VS
Supply Current1
IDD1
No Signal
-
4.85
6.0
mA
Supply Current2
IDD2
RFB1=0,RFB2=∞
-
220
320
μA
Supply Current3
IDD3
RL=0
-
28.0
50.0
mA
Reference Current
Iref
No Signal
8.0
9.0
10.0
μA
Output DC Voltage
VOUT
-
4.7
-
V
MIN.
TYP.
MAX.
UNIT
No Signal, LINEOUT
♦PreAmp CHARACTERISTICS (CIN=1nF, RL=100k unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
Voltage Gain
Gv
Vin=50mVrms
-0.8
-0.5
-0.2
dB
Frequency Response
ΔGf
1kHz-10kHz
-0.5
0
0.5
dB
-
1.0
-
pF
200
-
-
M
-
0.1
0.5
%
-
-108
-103
dBV
-
-112
-108
dBV
MIN.
TYP.
MAX.
UNIT
Input Capacitance
Ci
Input Resistance
Ri
Total Harmonic Distortion
THD
Output Noise Voltage 1
VNO1
Vin=100mVrms
BW=400Hz to 30kHz
Weighted-A, CNF=None
Output Noise Voltage 2
VNO2
Weighted-A, CNF=1nF
♦ LineAmp CHARACTERISTICS (Rg=0, RL=680 unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
Maximum Output Voltage
VOM
OUTPUT, THD=3%
1.8
2.1
-
Vrms
Voltage Gain
GV
Vin=10mVrms
Vo=1.6Vrms
BW=400Hz to 30kHz
Weighted-A
37.3
37.8
38.3
dB
-
0.1
0.5
%
-
-78
-72
dBV
Total Harmonic Distortion
THD
Output Noise Voltage
VNO
Output Resistance
Ro
-
5
10

Input Resistance
Ri
60
100
130
k
Ripple Rejection
RR
25
40
-
dB
-2-
VRipple=0.5Vrms
PREIN→LINEOUT
NJU7907A
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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