NTE987/NTE987SM
Integrated Circuit
Quad, Low Power OP Amp
Description:
The NTE987 and NTE987SM are low cost quad operational amplifiers with true differential inputs.
These have several distinct advantages over standard operational amplifier types in single supply ap-
plications. The quad amplifier can operate at supply voltages as low as 3V or as high as 32V with
quiescent currents about one fifth of those associated with the NTE941 (on a per amplifier basis).
The common mode input range includes the negative supply, thereby eliminating the necessity for
external biasing components in many applications. The output voltage range also includes the nega-
tive power supply voltage.
Features:
D
Available in 14Lead DIP (NTE987) and Surface Mount, SOIC14 (NTE987SM)
D
Short Circuit Protected Outputs
D
True Differential Input Stage
D
Single Supply Operation: 3V to 32V
D
Four Amplifiers per Package
D
Internally Compensated
D
Common Mode Range Extends to Negative Supply
D
Industry Standard PinOuts
Absolute Maximum Ratings: (T
A
= +25
C unles otherwise specified)
Power Supply Voltages
Single Supply, V
CC
32V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Split Supplies, V
CC
V
EE
16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Differential Voltage Range (Split Power Supplies), V
IDR
32V
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Common Mode Voltage range, V
ICR
0.3 to 32V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Forward Current (V
I
< 0.3V, Note 1), I
IF
50mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Short Circuit Duration, t
S
Continuous
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature, T
J
+150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. This input current will only exist when the voltage is negative at any of the input leads. Normal
output states will reestablish when the input voltage returns to a voltage greater than 0.3V.
Electrical Characteristics: (V
CC
= 5V, V
EE
= GND, T
A
= +25
C unles otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Offset Voltage
V
IO
V
CC
= 5V to 30V,
2
7
V
V
ICR
= 0 to V
CC
1.7V,
V
O
= 1.4V, R
S
= 0
T
A
= 0 to +70
C
9
V
Average Temperature Coefficient
of Input Offset Voltage
V
IO
/
T
T
A
= 0 to +70
C
7
V/
C
Input Offset Current
I
IO
5
50
nA
T
A
= 0 to +70
C
150
nA
Average Temperature Coefficient
of Input Offset Current
I
IO
/
T
T
A
= 0 to +70
C
10
pA/
C
Input Bias Current
I
IB
90
250
nA
T
A
= 0 to +70
C
500
nA
Input CommonMode Voltage
V
ICR
V
CC
= 30V
0
28.3
V
Range
T
A
= 0 to +70
C
0
28.0
V
Differential Input Voltage Range
V
IDR
V
CC
V
Large Signal OpenLoop
A
VOL
R
L
= 2k
, V
CC
= 15V,
25
100
V/mV
Voltage Gain
For Large V
O
Swing
T
A
= 0 to +70
C
15
V/mV
Channel Separation
1kHz
f
20kHz, Input Referenced
120
dB
CommonMode Rejection Ratio
CMRR
R
S
10k
65
70
dB
Power Supply Rejection Ratio
PSRR
65
100
dB
Output Voltage Range
V
OR
R
L
= 2k
0
3.3
V
Output Voltage High Limit
V
OH
V
CC
= 30V,
R
L
= 2k
26
V
T
A
= 0 to +70
C
R
L
= 10k
27
28
V
Output Voltage Low Limit
V
OL
V
CC
= 5V, R
L
= 10k
, T
A
= 0 to +70
C
5
20
mV
Output Source Current
I
Source
V
ID
= 1V, V
CC
= 15V
20
40
mA
T
A
= 0 to +70
C
10
20
mA
Output Sink Current
I
Sink
V
ID
= 1V, V
CC
= 15V
10
20
mA
T
A
= 0 to +70
C
5
8
mA
V
ID
= 1V, V
O
= 200mV
12
50
A
Output Short Circuit to GND
I
os
Note 3
40
60
mA
Power Supply Current
I
CC
V
O
= 0, R
L
=
,
V
CC
= 30V
3.0
mA
T
A
= 0 to +70
C
V
CC
= 5V
1.2
mA
Note 2. The input commonmode voltage or either input signal voltage should not be allowed to go
negative by more than 0.3V. The upper end of the commonmode voltage range is
V
CC
1.7V, but either or both inputs can go to +32V without damage.
Note 3. Short circuits from the output to V
CC
can cause excessive heating and eventual destruction.
Destructive dissipation can result from simultaneous shorts on all amplifiers.
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