NTE812
Integrated Circuit
Audio Power Amplifier, 1W
Description:
The NTE812 is a monolithic integrated circuit in a 14–Lead DIP type package designed for use in driver
and power amplifier applications at frequencies from 50Hz to 40kHz. This device will deliver up to 1W
RMS output power into an 8Ω load. The high input impedance and low standby current provide excellent
low–power audio output performance for portable applications. The high peak current capability can
be utilized for direct driving of complementary power transistors in high power amplifier applications.
Features:
D
1 Watt RMS Power into 8Ω with THD = 0.65% Typ
D
Peak Output Current: 1A
D
Wide Supply Voltage Range: 4V to 13V
D
High Input Impedance
Applications:
D
Radios
D
Phonographs
D
Portable Communications Receivers
D
Complementary Power Amplifier Drivers
D
Servo Drivers
Absolute Maximum Ratings:
(T
A
= +25°C unless otherwise specified)
Supply Voltage (Note 1), V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Output Current, I
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Continuous Power Dissipation (T
A
≤
+25°C, Note 2), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1W
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.7mW/°C
Operating Ambient Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +100°C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 1/16” from case, 10sec), T
L
. . . . . . . . . . . . . . . . . . . . . +260°C
Note 1. Voltage values are with respect to network GND terminal.
Note 2. This rating is valid for the condition that all pins are soldered into a printed circuit board with
a 2” x 2” copper layer area of 14 mil thickness. Most of the heat is conducted to the printed
circuit board copper layer through Pin8 (Input GND).
Electrical Characteristics:
(T
A
= +25°C, V
CC
= 12V unless otherwise specified)
Parameter
Continuous RMS Power Output
Input Voltage
Total Harmonic Distortion
Symbol
P
O
V
in
THD
Test Conditions
THD < 5%, R
L
= 8Ω, f = 1kHz
P
O
= 1W, R
L
= 8Ω, f = 1kHz
P
O
= 0.05W
P
O
= 1W
Efficiency
Cutoff Frequency
Lower
Upper
Input Impedance
Z
in
Z
out
Reference plane is test R1 = 100kΩ
circuit input terminal
R1 = 22kΩ
Reference plane is device output terminal
Reference P
O
= 1W, Input open
No Signal
No Signal
Pin Connection Diagram
Bootstrap
1
N.C.
2
Compensation 1
3
Compensation 2
4
Feedback
5
N.C.
6
Input
7
14
V
CC
13
V
CC
12
Output
11
N.C.
10
Output GND
9
N.C.
8
Input GND
Min
1
–
–
–
–
–
–
80
–
Typ
–
45
0.6
0.65
52
50
40
99
22
Max
–
70
–
5.0
–
–
–
–
–
Unit
W
mV
%
%
%
Hz
kHz
kΩ
kΩ
Ω
R
L
= 8Ω, f = 1kHz
P
O
= 1W, R
L
= 8Ω, f = 1kHz
Reference P
O
= 1W at 1kHz, R
L
= 8Ω
Output Impedance
Noise Output Level (Unfiltered)
Quiescent Output Voltage
Quiescent Supply Current
–
–
–
–70
6.2
5.5
–
–
9.0
dB
V
mA
14
8
1
7
.785 (19.95)
Max
.200 (5.08)
Max
.300
(7.62)
.100 (2.45)
.600 (15.24)
.099 (2.5) Min
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