NTE990
Integrated Circuit
Dual Audio Power Amplifier
Description:
The NTE990 is a monolithic dual power amplifier designed to deliver 2W/channel continuous into 8Ω
loads. The NTE990 is designed to operate with a low number of external components, and still pro-
vide flexibility for use in stereo phonographs, tape records and AM–FM stereo receivers, etc. Each
power amplifier is biased from a common internal regulator to provide high power supply rejection,
and output Q point centering. The NTE990 is internally compensated for all gains greater than 10.
Features:
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
2W/channel
–65 dB Ripple Rejection, Output Referred
–65 dB Channel Separation, Output Referred
Wide Supply Range: 6V to 24V
Very Low Cross–Over Distortion
Low Audio Band Noise
AC Short Circuit Protected
Internal Thermal Shutdown
Multi–Channel Audio Systems
Stereo Phonographs
Tape Recorders and Players
AM–FM Radio Receivers
Servo Amplifiers
Intercom Systems
Automotive Products
Applications:
Absolute Maximum Ratings:
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V
Input Voltage, V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±0.7V
Operating Junction Temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 10sec), T
L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Electrical Characteristics:
(V
S
= 20V, T
A
= +25°C, R
L
= 8Ω, A
V
= 50 (34 dB) unless otherwise
specified)
Parameter
Total Supply Current
Output Power
Total Harmonic Distortion
P
O
= 0W
THD = 10%
f = 1kHz, V
S
= 14V
P
O
= 50mW/Ch
P
O
= 500mW/Ch
P
O
= 1W/Ch
Output Swing
Channel Separation
R
L
= 8Ω
C
F
= 50µF, C
IN
= 0.1µF,
f = 1kHz, Output Referred
C
F
= 50µF, C
IN
= 0.1µF,
f = 120Hz, Output Referred
V
S
= 20V, V
O
= 4V
rms
V
S
= 7V, V
O
= 0.5V
rms
V
S
= 20V, V
ripple
= 1V
rms
V
S
= 7V, V
ripple
= 0.5V
rms
Test Conditions
Min
–
2.0
–
–
–
–
–50
–
–50
–
–
–
–
–
–
Open Loop
V
S
= 20V
–
9
–
–
–
Typ
25
–
0.075
0.045
0.055
V
S
–6
–70
–60
–65
–40
2.5
0.8
70
15
50
4
10
2.0
65
1.0
Max
50
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
11
–
–
–
Unit
mA
W/Ch
%
%
%
V
P–P
dB
dB
dB
dB
µA
mV
dB
mV
nA
MΩ
V
V/µs
kHz
A
Power Supply Rejection Ratio
Equivalent Noise Input
R
S
= 0, C
IN
= 0.1µF, BW = 20Hz to 20kHz,
Output Noise Wideband
R
S
= 0, C
IN
= 0.1µF, A
V
= 200
Open Loop Gain
Input Offset Voltage
Input Bias Current
Input Impedance
DC Output Level
Slew Rate
Power Bandwidth
Current Limit
R
S
= 0, f = 100kHz, R
L
= 8Ω
Note 1 For operation at ambient temperature greater than +25°C, the NTE990 must be derated
based on a maximum 150°C junction temperature using a thermal resistance which de-
pends upon device mounting techniques..
Pin Connection Diagram
Bias
1
Output 1
2
GND
3
GND
4
GND
5
Input 1
6
Feedback 1
7
14
V
CC
13
Output 2
12
GND
11
GND
10
GND
9
8
Input 2
Feedback 2
14
8
1
7
.785 (19.95)
Max
.300
(7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min
