NTE924 & NTE924M
Integrated Circuit
Voltage Follower, Operational Amplifier
Description:
The NTE924 and NTE924M are monolithic operational amplifiers internally connected as unitygain
noninverting amplifiers. These devices use supergain transistors in the input stage to get low bias
current without sacrificing speed. Directly interchangeable with the NTE909 and NTE941 series in
voltage follower applications, these devices have internal frequency compensation and provision for
offset balancing.
Features:
D
Available in 8Lead DIP (NTE924M) and 8Lead Metal Can (NTE924) Packages
D
Input Current: 10nA Max Over Temperature
D
Small Signal Bandwidth: 20MHz
D
Slew Rate: 30V/
s
D
Supply Voltage Range:
5V to
18V
Absolute Maximum Ratings:
Supply Voltage
18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (Note 2), P
D
500mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage (Note 3)
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output ShortCircuit Duration (Note 4)
Indefinite
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 10sec), T
L
+260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. The NTE924M is a discontinued device and no longer available.
Note 2. For operating at elevated temperatures, the NTE924 must be derated based on a thermal
resistance of +150
C/W, junctiontoambient, or +45
C/W, junctiontocase. The thermal
resistance of the NTE924M is +100
C/W, junctiontoambient.
Note 3. For supply voltages less than
15V, the absolute maximum input voltage is equal to the supply
voltage.
Note 4. Continuous shortcircuit is allowed for case temperatures to +70
C or +55
C ambient tem-
perature. It is necessary to insert a resistor greater than 2k
in series with the input when
the amplifier is driven from low impedance sources to prevent damage when the output is
shorted. R
S
= 5k min, 14k typical is recommended for dynamic stability in all applications.
Electrical Characteristics: (
5V
V
S
18V, 0
T
A
+70
C unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Unit
Input Offset Voltage
T
A
= +25
C
2.5
7.5
mV
10
mV
Input Bias Current
T
A
= +25
C
2.0
7.0
nA
10
nA
Input Resistance
T
A
= +25
C
10
10
10
12
Input Capacitance
1.5
pF
Large Signal Voltage Gain
T
A
= +25
C, V
S
=
15V, V
OUT
=
10V, R
L
= 8k
0.999
0.9999
V/V
V
S
=
15V, V
OUT
=
10V, R
L
= 10k
0.999
V/V
Output Resistance
T
A
= +25
C
0.75
2.5
Supply Current
T
A
= +25
C
3.9
5.5
mV
Temperature Drift
10
V/
C
Output Voltage Swing
V
S
=
15V, R
L
= 10k
, Note 5
10
V
Supply Voltage Rejection Ratio
5V
V
S
18V
70
80
dB
Note 5. Increased output swing under load can be obtained by connecting an external resistor
between the booster and V () terminals.
Pin Connection Diagram
NTE924
(Top View)
NTE924M
8
7
6
5
4
3
2
1
Balance
N.C.
Input
V ()
Booster
Output
V (+)
Balance
Output
Balance
1
2
3
4
Balance
N.C.
Input
V ()
8
7
6
5
V (+)
Booster
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