NTE NTE990 Datasheet

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 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 Cross–Over Distortion
D Low Audio Band Noise
D AC Short Circuit Protected
D Internal Thermal Shutdown

Applications:

D Multi–Channel Audio Systems
D Stereo Phonographs
D Tape Recorders and Players
D AM–FM Radio Receivers
D Servo Amplifiers
D Intercom Systems
D Automotive Products

Absolute Maximum Ratings:

Supply Voltage, V
Input Voltage, V
Operating Junction Temperature, T
Operating Temperature Range, T
Storage Temperature Range, T

CC

I

J

opr

stg

Lead Temperature (During Soldering, 10sec), T

26V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±0.7V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L

+300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics: (VS = 20V, TA = +25°C, RL = 8Ω, 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 = 8Ω – VS –6 – V
Channel Separation

CF = 50µF, CIN = 0.1µF,
f = 1kHz, Output Referred

Power Supply Rejection Ratio

CF = 50µF, CIN = 0.1µF,
f = 120Hz, Output Referred

Equivalent Noise Input RS = 0, CIN = 0.1µF, BW = 20Hz to 20kHz,

VS = 20V, VO = 4V

VS = 7V, VO = 0.5V

VS = 20V, V

VS = 7V, V

ripple

ripple

= 1V

= 0.5V

rms
rms

–50 –70 – dB

– –60 – dB

–50 –65 – dB

rms

rms

– –40 – dB
– 2.5 – µA

P–P

Output Noise Wideband

RS = 0, CIN = 0.1µF, AV = 200 – 0.8 – mV
Open Loop Gain RS = 0, f = 100kHz, RL = 8Ω – 70 – dB
Input Offset Voltage – 15 – mV
Input Bias Current – 50 – nA
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

Output 1

GND
GND

GND

Input 1

Feedback 1

1
2

3
4
5
6
7

V

14

Output 2

13

GND

12

GND

11

10

GND
Input 2

9

Feedback 2

8

CC