NTE NTE1294 Datasheet

NTE1294

Integrated Circuit

Audio Power Amplifier, 1.2W

Description:

The NTE1294 is a monolithic integrated audio amplifier in an 8–Lead DIP type package designed for
use as a low frequency class B power amplifier with a wide supply voltage range (3V to 16V) in porta­ble radios, cassette recorders, and players etc.

Features:

D Minimum Working Supplu Voltage: Vs = 3V Min
D Low Quiescent Current
D Low Number of External Components
D Good Ripple Rejection
D No Cross–over Distortion
D Low Power Dissipation
D Output Power:

Po = 2W at 12V/8Ω
Po = 1.6W at 9V/4Ω
Po = 1.2W at 9V/8Ω

Absolute Maximum Ratings:

Supply Voltage, V
Output Peak Current, I
Power Dissipation (TA = +50°C), P
Junction Temperature Range, T
Storage Temperature Range, T
Maximum Thermal Resistance, Junction–to–Ambient, R

s

o

tot

J

stg

thJA

Electrical Characteristics: (VS = 9V, TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Supply Voltage V
Quiescent Output Voiltage (Pin5) V
Quiescent Drain Current I
Bias Current (Pin3) I

s

o
d
b

3 – 16 V

4.0 4.5 5.0 V
– 4 12 mA
– 0.1 – µA

16V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100°C/W. . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics (Cont’d): (VS = 9V, TA = +25°C unless otherwise specified)

R = 120

Ω

Parameter Symbol Test Conditions Min Typ Max Unit

Output Power P

o

d = 10%,
f = 1kHz,

Ω

Input Sensitivity V

i(rms)

Rf = 120

Po = 1.2W,
RL = 8Ω,
f = 1kHz

Po = 50mW,
RL = 8Ω,
f = 1kHz

Input Resistance (Pin3) R

f = 1kHz – 5 – MΩ

i

Frequency Response (–3dB) B RL = 8Ω,

C5 = 1000µF,
R

= 120Ω

f

Distortion d Po = 500mW,

RL = 8Ω,
f = 1kHz

Vs = 12V, RL = 8Ω – 2 – W
Vs = 9V, RL = 4Ω – 1.6 – W
Vs = 9V, RL = 8Ω 0.9 1.2 – W
Vs = 6V, RL = 4Ω – 0.75 – W
Vs = 3.5V, RL = 4Ω – 0.25 – W
Vs = 3V, RL = 4Ω – 0.20 – W
Rf = 33Ω – 16 – mV

Rf = 120Ω – 60 – mV
Rf = 33Ω – 3.5 – mV
Rf = 120Ω – 12 – mV

CB = 680pF 25 to 7000 Hz
CB = 220pF 25 to 20000 Hz
Rf = 33Ω – 0.8 – %
Rf = 120Ω – 0.4 – %

Voltage Gain (Open Loop) G
Voltage Gain (Closed Loop) G

f = 1kHz, RL = 8Ω – 75 – dB

v

RL = 8Ω,

v

f = 1kHz

Input Noise Voltage e
Input Noise Current i
Signal to Noise Ratio

S + N

N

N

Note 1 – 3 – µV

N

Note 1 – 0.4 – nA

N

Po = 1.2W,
R

= 8Ω,

L

L

Gv = 34dB,
Note 1

Supply Voltage Rejection SVR RL = 8Ω, f

C6 = 47µF, R

Note 1. B = 22Hz to 22kHz

Rf = 33Ω – 45 – dB
Rf = 120Ω – 34 – dB

R1 = 10kΩ – 80 – dB

R1 = 50kΩ – 70 – dB

ripple

= 120Ω

f

= 100Hz,

– 42 – dB