NTE928M & NTE928SM
Integrated Circuit
Low Power Dual Operational Amplifier
Description:
Utilizing the circuit designs perfected for recently introduced Quad Operational Amplifiers, the
NTE928M/NTE928SM dual operational amplifier features low power drain, a common mode input
voltage range extending to ground/V
EE
, and Single Supply or Split Supply Operation.
This amplifier has several distinct advantages over standard operational amplifier types in single sup-
ply applications. It can operate at supply voltages as low as 3.0 Volts or as high as 32 Volts with quies-
cent currents about onefifth 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 exter-
nal biasing power supply voltage.
Features:
D
Short Circuit Protected Outputs
D
True Differential Input Stage
D
Single Supply Operation: 3.0 to 32 Volts
D
Low Input Bias Currents
D
Internally compensated
D
Common Mode Range Extends to Negative Supply
D
Single and Split Supply Operation
Maximum Ratings:
Power Supply Voltages
Single Supply, V
CC
32V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Split Supplies, V
CC
V
EE
16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Differential Voltage Range (Note 1), V
IDR
32V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Common Mode Voltage Range (Note 2), V
ICR
0.3 to 32V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Forward Current (V
I
0.3V, Note 3), I
IF
50mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Short Circuit Duration, t
S
Continuous
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction Temperature, T
J
55
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Split Power Supplies
Note 2. For supply voltages less than 32V, the absolute maximum input voltage is equal to the supply
voltage.
Note 3. 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 unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Offset Voltage
V
IO
V
CC
= 5V to 30V,
2.0
7.0
mV
V
IC
=0 to V
CC
1.7V,
V
O
]
1.4V, R
S
= 0
0
T
A
+70
C
9.0
mV
Average Temperature Coefficient
of Input Offset Voltage
V
IO
/
T
0
T
A
+70
C
7.0
V/
C
Input Offset Current
I
IO
5.0
50
nA
0
T
A
+70
C
150
nA
Average Temperature Coefficient
of Input Offset Current
I
IO
/
T
0
T
A
+70
C
10
pA/
C
Input Bias Current
I
IB
45
250
nA
0
T
A
+70
C
50
500
nA
Input CommonMode Voltage
V
ICR
V
CC
= 30V, Note 4
0
28.3
V
Range
0
T
A
+70
C
0
28
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
0
T
A
+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
0
T
A
+70
C
R
L
= 10k
27
28
V
Output Voltage Low Limit
V
OL
V
CC
= 5V, R
L
= 10k
, 0
T
A
+70
C
5
20
mV
Output Source Current
I
O+
V
ID
= +1V, V
CC
= 15V
20
40
mA
Output Sink Current
I
O
V
ID
= 1V, V
CC
= 15V
10
20
mA
V
ID
= 1V, V
O
= 200mV
12
50
A
Output ShortCircuit to GND
I
os
Note 5
40
60
mA
Power Supply Current
I
CC
V
O
= 0, R
L
=
,
V
CC
= 30V
1.5
3.0
mA
0
T
A
+70
C
V
CC
= 5V
0.7
1.2
mA
Note 4. 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 goto +32V without damage.
Note 5. Short circuit 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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