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 provide 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 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 Applications: D D D D D D D Multi–Channel Audio Systems Stereo Phonographs Tape Recorders and Players AM–FM Radio Receivers Servo Amplifiers Intercom Systems Automotive Products Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.7V Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C Electrical Characteristics: (VS = 20V, TA = +25°C, RL = 8Ω, AV = 50 (34 dB) unless otherwise specified) Parameter Test Conditions Total Supply Current PO= 0W Output Power THD = 10% Total Harmonic Distortion f = 1kHz, VS = 14V Min Typ Max Unit – 25 50 mA 2.0 – – W/Ch PO = 50mW/Ch – 0.075 – % PO = 500mW/Ch – 0.045 – % PO = 1W/Ch – 0.055 – % – VS –6 – VP–P Output Swing RL = 8Ω Channel Separation CF = 50µF, CIN = 0.1µF, f = 1kHz, Output Referred VS = 20V, VO = 4Vrms –50 –70 – dB VS = 7V, VO = 0.5Vrms – –60 – dB CF = 50µF, CIN = 0.1µF, f = 120Hz, Output Referred VS = 20V, Vripple = 1Vrms –50 –65 – dB VS = 7V, Vripple = 0.5Vrms – –40 – dB RS = 0, CIN = 0.1µF, BW = 20Hz to 20kHz, Output Noise Wideband – 2.5 – µA RS = 0, CIN = 0.1µF, AV = 200 – 0.8 – mV RS = 0, f = 100kHz, RL = 8Ω – 70 – dB Input Offset Voltage – 15 – mV Input Bias Current – 50 – nA Power Supply Rejection Ratio Equivalent Noise Input Open Loop Gain Input Impedance Open Loop – 4 – MΩ DC Output Level VS = 20V 9 10 11 V Slew Rate – 2.0 – V/µs Power Bandwidth – 65 – kHz Current Limit – 1.0 – A 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 depends upon device mounting techniques.. Pin Connection Diagram Bias 1 Output 1 2 14 VCC 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) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min