NJM2149
-1 -
LOW VOLTAGE AUDIO POWER AMPLIFIER
■
■■
■ GENERAL DESCRPTION ■ PACKAGE OUTLENE
The NJM2149 is an audio power amplifier designed
for telephone applications.
No external coupling capacitors are required because
of the differential outputs. The closed loop gain is
adjusted by two external resistors, and a CD pin permit
powering down with muting t he input signal.
The NJM2149 improves the tern noise reduction in
switching Power Down mode and external high band
noise reduction, compared with NJM2135.
It is suitable for portable telephone , wireless
telephone, button telephone, and other speaker
amplifier app li cat io ns.
■
■■
■ FEATURES
●Operating Voltage +2 - +6V
●Operati ng Current 2.2mA typ., at V+=3V
●Supply Current in Power Down Mo de 0.1µA typ
●Output Power Exceed s250mW V+=6V,RL=32Ω
●Gain Ra nge GVD= 0-43dB, Voise Band
●Load Impedance RL=8-200Ω
●Bipo lar Techno logy
●Package Outline DIP8,DMP8,SSOP8,VSP8,TVSP8
■
■■
■ PIN CONFIGURATION
BIAS 1
2
3
4
8
5
6
7
-VIN
+VIN
+VREF
VOUT1
CD
GND
V+
VOUT2
#A
#B
20kΩ
20kΩ
145kΩ
50kΩ
50kΩ
PIN FUNCTION
1.CD
2.+VREF
3.+VIN
4.-VIN
5.VOUT1
6.V
+
7.GND
8.VOUT2
NJM2149D NJM2149M
NJM2149V NJM2149R
NJM2149RB1
NJM2149
- 2 -
■
■■
■ ABSOLUTE MAXMUM RANGE (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Supply Vo ltage V+ +7 V
Power Dis si p ati on PD
(DIP8) 500
(DMP8) 500 (note1)
(SSOP8) 360 (note1)
(VSP8/TVSP8) 320
mW
Operating Te mper at ure Range Topr -40 to +85 °C
Storage Te mper at ure R ange Tstg -40 to +125 °C
(note1)Mounted on PC Boar d
■
■■
■ ELE CTRI CAL CHA RACT E RIS TI CS (V
+=6.0V, 1pin=2V, Ta=25°C u nless otherwise sp ecified)
PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Operatin g Voltage V+ 2.0 - 6.0 V
Operating Current ICC V+=3.0V, RL=∞, No Signa l - 2.2 3.5 mA
Operating Current
at Power Down Mode ICCD V+=3.0V, RL=∞, 1pi n= 0.8V, No Signal - 0.1 1.0
µA
Open Loop G ain AV1 Amp#A, f<100Hz 84 90 - dB
Closed Loop Gain AV2 Amp#B, f=1kHz, RL=32Ω -0.35 0 +0.35 dB
Output Power PO1 V+=3.0V, RL=16Ω, THD≤10% (note2) 55 - - mW
P
O2 V+=6.0V, RL=32Ω, THD≤10% (note2) 250 - - mW
Tot al Har moni c
Distortion THD1 V+=6V, RL=32Ω, PO=125mW,
f =1kHz, GVD=34dB - 0.5 1.0 %
THD2
V+≥3V, RL=8Ω, PO=20mW,
f=1 k Hz, G VD=12dB - 0.5 - %
Power S upply SVR1 C1=∞, C2=0.01µF, DC 50 - - dB
Rejection Ratio SVR2 C1=0.1µF, C2=0, f=1kHz - 12 - dB
(V+=3.0V-6.0V) SVR3
C1=1.0µF, C2=5.0µF, f=1kHz - 47 - dB
Mute Attenuation MAT f =1kHz- 20kHz, 1pin=0. 8V - 70 - dB
Output Voltage VO1 V+=3.0V, RL=16Ω 1.00 1.15 1.25 V
(Rf=75kΩ, DC) VO2 V+=6.0V - 2.60 - V
Output Hi gh Level VOH IOUT=-75mA, V+=2.0-6.0V - V+-1.1 - V
Output Low Level VOL IOUT=75mA, V+=2.0-6.0V -30 0.21 - V
Output DC Offset ∆VO Rf=75kΩ, RL=32Ω, 5pin-8pin -30 0 +30 mV
Input Bias C urrent IB 4pin - 0 -200 nA
Equiva lent Resistance R+IN 3pin 100 170 220 kΩ
R
REF 2pin 18 26 40
kΩ
CD Input Voltage H VCDH 1pin 2.0 - V+ V
CD Input Volt age L VCDL 1pin 0.0 - 0.8 V
CD Input Resi stance RCD V+=VCD=6.0V, 1pin 50 85 175 kΩ
(note2) NJM2149M,NJM2149V,NJM21 49R,NJM214 9R B1:Mounted on PC Bo ard
■
■■
■ CONT RO L TE R MINAL EXPLANATIO N
CHIP DI SA BL E CON TRO L( C D PIN)
PARAMETER CONTROL SIGNAL STATUS
CD OFF H(=VCDH) IC is active.
CD ON L(=VCDL) IC is standby. (with Mute)
NJM2149
-
3
-
■
■■
■ APPLICATION CURCUIT
BIAS 1
2
3
4
8
5
6
7
Ci Ri
C2
CD(POWER DOWN)
10µF
V+=+6V
#A
#B
4.7µF
INPUT
SPEAKER
32Ω
Rf 75kΩ
0.1µF 3.0kΩ
C1
1.0µF50kΩ
50kΩ
145kΩ
note:1.The CD terminal(1pin) should connect High level(>2.0V), when NJM2149 is active.
The standby mode, when the CD terminal is Low leve l( <0.8V).
2.To add the C1 and C2 capacitor, the power-supply-rejection-ratio will be improved.
When C1 is large value, C2 will be unnecessary.
3.The power-up time depend on the C1 and C2 capacitor.
4.The input current of CD terminal is as shown below figure.
V+
1pin 72kΩ
80kΩ
GND
5.No connect oscillation-protect RC required.
To connect oscillation-protect RC, if the NJM2149 oscillate with PC board/stray capacitor/long speaker wire
and others condition.
NJM2149
- 4 -
■
■■
■ TYP CAL CHARACTERISTICS
Operating Current vs. Operating Voltage Standby Current vs. Operating Voltage
(V
CD=V+,Ta=25°C) (V
CD=GND,Ta=25°C)
CD Sink Current vs. CD Voltage Power Dissipation vs. Output Power
(V
+=6V,Ta=25°C) (R
L=8Ω,Ta=25°C)
Power Dissipation vs. Output Power Power Dissipation vs. Output Power
(R
L=16Ω,Ta=25°C) (R
L=32Ω,Ta=25°C)
0
0.5
1
1.5
2
2.5
3
3.5
4
0123456
V
+
[V]
0
0.5
1
1.5
2
0123456
V
+
[V]
0
50
100
150
200
0123456
V
CD
[V]
0
200
400
600
800
1000
0 100 200 300 400 500
3V
6V
Po[mW]
0
200
400
600
800
1000
0 100 200 300 400 500
3V
6V
Po[mW]
0
200
400
600
800
1000
0 100 200 300 400 500
3V
6V
Po[mW]
NJM2149
-
5
-
■
■■
■ TYPCAL CHA RA CTER I STIC S
Total Harmonic Distortion vs. Output Power Total Harmonic Distortion vs. Output Power
(f=1kHz,G
VD=34dB,Ta=25°C) (f=3kHz,G
VD=34dB,Ta=25°C)
Total Harmonic Distortion vs. Output Power
(f=1.3kHz,G
VD=12dB,Ta=25°C)
Maximum Output Swing vs. Load Current Maximum Output Swing vs. Load Current
(V
+ Side,V+=6V,Ta=25°C) (GND Side,V
+=6V,Ta=25°C)
600
800
1000
1200
1400
1600
1800
2000
0 50 100 150 200 250 300
I
L
[mA]
0
500
1000
1500
2000
0 50 100 150 200 250 300
I
L
[mA]
0
2
4
6
8
10
0 0.1 0.2 0.3 0.4 0.5
V+=3V,RL=8OHM
V+=3V,RL=16OHM
V+=6V,RL=16OHM
V+=6V,RL=32OHM
Po[W]
0
2
4
6
8
10
0 0.1 0.2 0.3 0.4 0.5
V+=3V,RL=8OHM
V+=3V,RL=16OHM
V+=6V,RL=16OHM
V+=6V,RL=32OHM
Po[W]
0
2
4
6
8
10
0 0.1 0.2 0.3 0.4 0.5
V+=3V,RL=8OHM
V+=3V,RL=16OHM
V+=6V,RL=16OHM
V+=6V,RL=32OHM
Po[W]
NJM2149
-
6
-
■
■■
■ TYPCAL CHA RA CTER I STIC S
Supply Voltage Rejection Ratio vs. Frequency Supply Voltage Rejection Ratio vs. Frequency
(V
+=6V,GVD=34dB,C2=0µF,Ta=25°C) (V
+=6V,GVD=34dB,C2=1µF,Ta=25°C)
Supply Voltage Rejection Ratio vs. Frequency Supply Voltage Rejection Ratio vs. Frequency
(V
+=6V,GVD=34dB,C2=5µF,Ta=25°C) (V
+=6V,GVD=34dB,C2=10µF,Ta=25°C)
Operating Current vs. Temperature Standby Current vs. Temperature
(V
+=6V) (V
+=6V)
0
0.5
1
1.5
2
2.5
3
3.5
4
-100 -50 0 50 100 150
Icc3[mA]
Ta[
o
C]
10
-10
10
-9
10
-8
10
-7
10
-6
10
-5
0.0001
-40-20020406080
Ta[
o
C]
0
10
20
30
40
50
60
70
1000 10
4
C1=5uF
C1=1uF
C1=0.1uF
f[Hz]
200 0
10
20
30
40
50
60
70
1000 10
4
C1=5uF
C1=1uF
C1=0.1uF
C1=0uF
f[Hz]
200
0
10
20
30
40
50
60
70
1000 10
4
C1=1uF
C1=0.1uF
C1=0uF
f[Hz]
200 0
10
20
30
40
50
60
70
1000 10
4
C1=1uF
C1=0.1uF
C1=0uF
f[Hz]
200
NJM2149
-7 -
■
■■
■ TYPCAL CHA RA CTER I STIC S
Output Offset Voltage vs. Temperature Output Power vs. Temperature
(V
+=6V) (V
+=6V)
MEMO
[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 th e product and not intended for the
g
uarantee or
p
ermission of an
y
ri
g
ht
-10
-5
0
5
10
-100 -50 0 50 100 150
Ta[
o
C]
0
100
200
300
400
500
-40-200 20406080
Po3[mW]
Po6[mW]
Ta[
o
C]
