NTE894M & NTE894SM
Integrated Circuit
Low Noise
Operational Amplifier
Description:
The NTE891M and NTE891SM are single, high–performance, low noise operational amplifiers.
Compared to other operational amplifier, these devices show better noise performance, improved
output drive capability and considerably higher small–signal 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
Small–Signal Bandwidth
D
Large Supply Voltage Range
D
Available in 8–Lead Mini DIP (NTE894M) and Surface Mount SOIC–8 (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 Short–Circuit 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 junction–to–
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
Input Offset Voltage
Symbol
V
OS
T
A
= 0° to +70°C
∆V
OS
/∆T
Input Offset Current
I
OS
T
A
= 0° to +70°C
∆I
OS
/∆T
Input Bias Current
I
B
T
A
= 0° to +70°C
∆I
B
/∆T
Supply Current
Input Common–Mode Range
Common–Mode Rejection Ratio
Power Supply Rejection Ratio
Large–Signal Voltage Gain
Output Voltage Swing
I
CC
T
A
= 0° to +70°C
V
CM
CMRR
PSRR
A
VOL
V
OUT
R
L
≥
600Ω, V
O
=
±10V
T
A
= 0° to +70°C
R
L
≥
600Ω
T
A
= 0° to +70°C
R
L
≥
600Ω, V
O
=
±18V
R
L
≥
2kΩ
T
A
= 0° to +70°C
Input Resistance
Output Short–Circuit Current
R
IN
I
SC
Test Conditions
Min
–
–
–
–
–
–
–
–
–
–
–
±12
70
–
25
15
±12
±10
±15
±13
±12
50
–
Typ
0.5
–
5
20
–
200
500
–
5
4
–
±13
100
10
100
–
±13
±12
±16
±13.5
±12.5
100
38
Max
4
5
–
300
400
–
1500
2000
–
8
10
–
–
100
–
–
–
–
–
–
–
–
–
Unit
mV
mV
µV/°C
nA
nA
pA/°C
nA
nA
nA/°C
mA
mA
V
dB
µV/V
V/mV
V/mV
V
V
V
V
V
kΩ
mA
AC Electrical Characteristics:
(T
A
= +25°C, V
S
=
±15V
unless otherwise specified)
Parameter
Output Resistance
Transient Response
Rise Time
Overshoot
Transient Response
Rise Time
Overshoot
Gain
Gain Bandwidth Product
Slew Rate
Power Bandwidth
A
V
GBW
SR
f = 10kHz, C
C
= 0
f = 10kHz, C
C
= 22pF
C
C
= 22pF, C
L
= 100pF
C
C
= 0
C
C
= 22pF
V
OUT
=
±10V,
C
C
= 0
V
OUT
=
±10V,
C
C
= 22pF
V
OUT
=
±14V,
R
L
= 600Ω, C
C
= 22pF, V
CC
=
±18V
t
R
V
IN
= 50mV, R
L
= 600Ω, C
C
= 47pF, C
L
= 500pF
–
–
–
–
–
–
–
–
–
–
50
35
6
2.2
10
13
6
200
95
70
–
–
–
–
–
–
–
–
–
–
ns
%
V/mV
V/mV
MHz
V/µs
V/µs
kHz
kHz
kHz
t
R
Symbol
R
OUT
Test Conditions
A
V
= 30dB, Closed–Loop, f = 10kHz, R
L
= 600Ω,
C
C
= 22pF
Voltage Follower, V
IN
= 50mV, R
L
= 600Ω,
C
C
= 22pF, C
L
= 100pF
–
–
20
20
–
–
ns
%
Min
–
Typ
0.3
Max
–
Unit
Ω
Electrical Characteristics:
(T
A
= +25°C, V
S
= 15V unless otherwise specified)
Parameter
Input Noise Voltage
Input Noise Current
Broadband Noise Figure
Channel Separation
Symbol
V
NOISE
I
NOISE
f
O
= 30Hz
f
O
= 1kHz
f
O
= 30Hz
f
O
= 1kHz
f = 10Hz to 20kHz, R
S
= 5kΩ
f = 1kHz, R
S
= 5kΩ
Pin Connection Diagram
Balance
1
Inverting Input
2
Non–Inverting Input
3
V (–)
4
NTE894M
8
5
Test Conditions
Min
–
–
–
–
–
–
Typ
5.5
3.5
1.5
0.4
0.9
110
Max
7.0
4.5
–
–
–
–
Unit
nVpHz
nVpHz
pApHz
pApHz
dB
dB
8
Balance/Compensation
7
V (+)
6
Output
5
Compensation
.256 (6.52) Max
1
.393 (10.0)
Max
4
.300 (7.62)
.150
(3.81)
.100 (2.54)
.300 (7.62)
.070 (1.77) Min
NTE894SM
.192 (4.9)
8
5
.154
(3.91)
.236
(5.99)
1
4
.050 (1.27)
016
(.406)
061
(1.53)
.198 (5.03)
.006 (.152)
NOTE: Pin1 on Beveled Edge
