NTE894M & NTE894SM
Integrated Circuit
Low Noise
Operational Amplifier
Description:
The NTE891M and NTE891SM are single, highperformance, low noise operational amplifiers.
Compared to other operational amplifier, these devices show better noise performance, improved
output drive capability and considerably higher smallsignal and power bandwidths.
This makes the devices especially suitable for applications in high quality and professional audio
equipment, in instrumentation and control circuits and telephone channel amplifiers. The OP amps
are internally compensated for gain equal to, or higher than, three.
Features:
D
SmallSignal Bandwidth
D
Large Supply Voltage Range
D
Available in 8Lead Mini DIP (NTE894M) and Surface Mount SOIC8 (NTE894SM)
Applications:
D
Audio Equipment
D
Instrumentation and Control Circuits
D
Telephone Channel Amplifiers
D
Medical Equipment
Absolute Maximum Ratings:
Supply Voltage, V
S
22V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Input Voltage (Note 1), V
DIFF
0.5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, V
IN
V supply V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
= +25
C, Note 2), P
D
1150mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output ShortCircuit Duration (Note 3)
Indifinite
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Soldering Temperature (10 seconds), T
L
+300
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Diodes protect the inputs against over voltage. Therefore, unless current limiting resistors
are used, large currents will flow if the differential input voltage exceeds 0.6V. maximum cur-
rent should be limited to
10mA.
Note 2. For operation at elevated temperature, derate packages based on the following junctionto
ambient thermal resistance: NTE894M 105
C/W; NTE894SM 160
C/W.
Note 3. Output may be shorted to GND at V
S
= 15V, T
A
= +25
C. Temperature and/or supply voltages
must be limited to ensure dissipation rating is not exceeded.
DC Electrical Characteristics: (T
A
= +25
C, V
S
=
15V, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Offset Voltage
V
OS
0.5
4
mV
T
A
= 0
to +70
C
5
mV
V
OS
/
T
5
V/
C
Input Offset Current
I
OS
20
300
nA
T
A
= 0
to +70
C
400
nA
I
OS
/
T
200
pA/
C
Input Bias Current
I
B
500
1500
nA
T
A
= 0
to +70
C
2000
nA
I
B
/
T
5
nA/
C
Supply Current
I
CC
4
8
mA
T
A
= 0
to +70
C
10
mA
Input CommonMode Range
V
CM
12
13
V
CommonMode Rejection Ratio
CMRR
70
100
dB
Power Supply Rejection Ratio
PSRR
10
100
V/V
LargeSignal Voltage Gain
A
VOL
R
L
600
,
V
O
=
10V
25
100
V/mV
T
A
= 0
to +70
C
15
V/mV
Output Voltage Swing
V
OUT
R
L
600
12
13
V
T
A
= 0
to +70
C
10
12
V
R
L
600
,
V
O
=
18V
15
16
V
R
L
2k
13
13.5
V
T
A
= 0
to +70
C
12
12.5
V
Input Resistance
R
IN
50
100
k
Output ShortCircuit Current
I
SC
38
mA
AC Electrical Characteristics: (T
A
= +25
C, V
S
=
15V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Resistance
R
OUT
A
V
= 30dB, ClosedLoop, f = 10kHz, R
L
= 600
,
C
C
= 22pF
0.3
Transient Response
Voltage Follower, V
IN
= 50mV, R
L
= 600
,
C
C
= 22pF, C
L
= 100pF
Rise Time
t
R
20
ns
Overshoot
20
%
Transient Response
V
IN
= 50mV, R
L
= 600
, C
C
= 47pF, C
L
= 500pF
Rise Time
t
R
50
ns
Overshoot
35
%
Gain
A
V
f = 10kHz, C
C
= 0
6
V/mV
f = 10kHz, C
C
= 22pF
2.2
V/mV
Gain Bandwidth Product
GBW
C
C
= 22pF, C
L
= 100pF
10
MHz
Slew Rate
SR
C
C
= 0
13
V/
s
C
C
= 22pF
6
V/
s
Power Bandwidth
V
OUT
=
10V, C
C
= 0
200
kHz
V
OUT
=
10V, C
C
= 22pF
95
kHz
V
OUT
=
14V, R
L
= 600
, C
C
= 22pF, V
CC
=
18V
70
kHz
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