NTE812
Integrated Circuit
Audio Power Amplifier, 1W
Description:
The NTE812 is a monolithic integrated circuit in a 14Lead 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 8
load. The high input impedance and low standby current provide excellent
lowpower 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 8
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
Symbol
Test Conditions
Min
Typ
Max
Unit
Continuous RMS Power Output
P
O
THD < 5%, R
L
= 8
, f = 1kHz
1
W
Input Voltage
V
in
P
O
= 1W, R
L
= 8
, f = 1kHz
45
70
mV
Total Harmonic Distortion
THD
P
O
= 0.05W
R
L
= 8
, f = 1kHz
0.6
%
P
O
= 1W
0.65
5.0
%
Efficiency
P
O
= 1W, R
L
= 8
, f = 1kHz
52
%
Cutoff Frequency
Lower
Reference P
O
= 1W at 1kHz, R
L
= 8
50
Hz
Upper
40
kHz
Input Impedance
Z
in
Reference plane is test R1 = 100k
80
99
k
circuit input terminal
R1 = 22k
22
k
Output Impedance
Z
out
Reference plane is device output terminal
Noise Output Level (Unfiltered)
Reference P
O
= 1W, Input open
70
dB
Quiescent Output Voltage
No Signal
6.2
V
Quiescent Supply Current
No Signal
5.5
9.0
mA
Pin Connection Diagram
V
CC
V
CC
Input GND
1
2
3
4
Bootstrap
N.C.
Compensation 1
Compensation 2
5
Feedback
6
N.C.
7
Input
14
13
12
11
Output
N.C.
10
Output GND
9
N.C.
8
.600 (15.24)
1
7
14
8
.300
(7.62)
.200 (5.08)
Max
.100 (2.45)
.099 (2.5) Min
.785 (19.95)
Max
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