NTE990
Integrated Circuit
Dual Audio Power Amplifier
Description:
The NTE990 is a monolithic dual power amplifier designed to deliver 2W/channel continuous into 8
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 AMFM 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 2W/channel
D 65 dB Ripple Rejection, Output Referred
D 65 dB Channel Separation, Output Referred
D Wide Supply Range: 6V to 24V
D Very Low CrossOver Distortion
D Low Audio Band Noise
D AC Short Circuit Protected
D Internal Thermal Shutdown
Applications:
D MultiChannel Audio Systems
D Stereo Phonographs
D Tape Recorders and Players
D AMFM Radio Receivers
D Servo Amplifiers
D Intercom Systems
D Automotive Products
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V
Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7V
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +150C
Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C
Electrical Characteristics: (VS = 20V, TA = +25C, RL = 8, AV = 50 (34 dB) unless otherwise
specified)
Parameter Test Conditions Min Typ Max Unit
Total Supply Current PO= 0W 25 50 mA
Output Power THD = 10% 2.0 W/Ch
Total Harmonic Distortion f = 1kHz, VS = 14V PO = 50mW/Ch 0.075 %
PO = 500mW/Ch 0.045 %
PO = 1W/Ch 0.055 %
Output Swing RL = 8 VS 6 VPP
Channel Separation CF = 50F, CIN = 0.1F, VS = 20V, VO = 4Vrms 50 70 dB
f = 1kHz, Output Referred
VS = 7V, VO = 0.5Vrms 60 dB
Power Supply Rejection Ratio CF = 50F, CIN = 0.1F, VS = 20V, Vripple = 1Vrms 50 65 dB
f = 120Hz, Output Referred
VS = 7V, Vripple = 0.5Vrms 40 dB
Equivalent Noise Input RS = 0, CIN = 0.1F, BW = 20Hz to 20kHz, 2.5 A
Output Noise Wideband
RS = 0, CIN = 0.1F, AV = 200 0.8 mV
Open Loop Gain RS = 0, f = 100kHz, RL = 8 70 dB
Input Offset Voltage 15 mV
Input Bias Current 50 nA
Input Impedance Open Loop 4 M
DC Output Level VS = 20V 9 10 11 V
Slew Rate 2.0 V/s
Power Bandwidth 65 kHz
Current Limit 1.0 A
Note 1 For operation at ambient temperature greater than +25C, the NTE990 must be derated
based on a maximum 150C junction temperature using a thermal resistance which de-
pends upon device mounting techniques..
Pin Connection Diagram
Bias 1 14 VCC
Output 1 2 13 Output 2
GND 3 12 GND
GND 4 11 GND
GND 5 10 GND
Input 1 6 9 Input 2
Feedback 1 7 8 Feedback 2
14 8
1 7
.785 (19.95) .300
Max (7.62)
.200 (5.08)
Max
.100 (2.45) .099 (2.5) Min
.600 (15.24)
