938

NTE938 & NTE938M
Integrated Circuit
Precision Operational Amplifier
(OP Amp)
Description:
The NTE938 and NTE938M operational amplifiers provide high input impedance, low input offsets
and temperature drifts, and low noise. This series of amplifiers is particularly useful for applications
where high−accuracy and low−drift performance are essential. In addition, high−speed performance
may be improved by employing feed−forward compensation techniques to maximize slew rate without compromising other performance criteria.
The NTE938 and NTE938M offer extremely low input offset voltage and drift specifications allowing
usage in even the most critical applications without external offset nulling.
Features:
D Available in Two Packages Styles:
8−Lead Metal Can (NTE938)
8−Lead DIP (NTE938M)
D Operation From a Wide Range of Power Supply Voltages
D Low Input Bias and Offset Currents
D Low Input Offset Voltage and Guaranteed Offset Voltage Drift Performance
D High Input Impedance
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Supply Voltage, VCC, VEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18V
Input Voltage (Note 2), VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V
Input Differential Current (Note 2), IID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10mA
Output Short−Circuit Duration, tS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indifinite
Operating Junction Temperature, TJ
NTE938 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175°C
NTE938M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C
Note 1. NTE938 is a discontinued device and no longer available.
Note 2. For supply voltages less than ±15V, the maximum input voltage is equal to the supply voltage.
Note 3. The inputs are shunted with back−to−back diodes for over−voltage protection. Therefore,
excessive current will flow if a differential input voltage in excess of 1.0V is applied between
the inputs unless some limiting resistance is used.
Electrical Characteristics: (TA = +25°C, 5V ≤ VCC ≤ 15V, −15V ≤ VEE ≤ −5V unless otherwise
specified)
Parameter
Symbol
Input Offset Voltage
Test Conditions
Min
Typ
Max
Unit
−
2.0
7.5
mV
−
−
10
mV
−
0.2
1.0
nA
−
−
1.5
nA
−
1.5
7.0
nA
−
−
10
nA
10
40
−
MΩ
VCC = +15V, VEE = −15V
−
±0.3
±0.8
mA
VCC = +15V, VEE = −15V, VO = ±10V,
RL ≥ 10kΩ
25
300
−
V/mV
VCC = +15V, VEE = −15V, VO = ±10V,
RL ≥ 10kΩ, TA = 0° to +70°C
15
−
−
V/mV
VIO
TA = 0° to +70°C
Input Offset Current
IIO
TA = 0° to +70°C
Input Bias Current
IIB
TA = 0° to +70°C
Input Resistance
rI
Power Supply Currents
ICC, IEE
Large Signal Voltage Gain
AVOL
Average Temperature Coefficient of
Input Offset Temperature
∆VIO/∆T 0° ≤ TA ≤ +70°C
−
6
30
µV/°C
Average Temperature Coefficient of
Input Offset Current
∆IIO/∆T
−
2
10
pA/°C
VCC = +15V, VEE = −15V
±14
−
−
V
Input Voltage Range
VIR
Common Mode Rejection Ratio
CMRR
RS ≤ 50kΩ
80
100
−
dB
Supply Voltage Rejection Ratio
PSRR
RS ≤ 50kΩ
80
96
−
dB
VCC = +15V, VEE = −15V, RL = 10kΩ
±13
±14
−
V
Output Voltage Range
VOR
Pin Connection Diagram
NTE938
(Top View)
Output
N.C.
5
6
V (+) 7
Compensation 2
4
V (−)
3 Non−Inverting Input
8
NTE938M
2
Inverting Input
1
Compensation
1
Compensation 1
1
8
Compensation 2
Invert Input
2
7
V (+)
Non−Inverting Input
3
6
Output
V (−)
4
5
N.C.
NTE938
.370 (9.39) Dia Max
.355 (9.03) Dia Max
.177 (4.5)
Max
.492
(12.5)
Min
.018 (0.45) Dia Typ
2
3
4
1
45°
8
5
7 6
.032 (0.82)
.200
(5.08)
Dia
NTE938M
8
5
.256 (6.52) Max
1
4
.300 (7.62)
.300
(7.62)
.150
(3.81)
.100 (2.54)
.070 (1.77) Min
.393 (10.0)
Max
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