NTE871
Integrated Circuit
Wideband High Speed Operational Amp
Description:
The NTE871 is a largesignal wideband, high speed operational amplifier which has a unity gain
crossover frequency (f
T
) of approximately 38MHz and an openloop, 3dB corner frequency of approx-
imately 110kHz. It can operate at a total supply voltage of from 14 to 36 volts (
7 to
18 votls when
using split supplies) and can provide at least 18V
PP
and 30mA
PP
at the output when operating from
15 volt supplies. The NTE871 can be compensated with a single external capacitor and has DC
offset adjust terminals for those applications requiring offset null.
The NTE871 circuit contains both bipolar and PMOS transistors on a single monlithic chip and is sup-
plied in a 8Lead TO5 package.
Features:
D
High OpenLoop Gain at Video Frequencies: 42dB Typ. at 1MHz
D
High UnityGain Crossover Frequency: f
T
= 38MHz Typ.
D
Wide Power Bandwidth;
V
O
= 18V
PP
: 1.2MHz Typ.
D
High Slew Rate;
20dB Amplifier: 70V/
s Typ.
UnityGain Amplifier: 25V/
s Typ.
D
Fast Setting Time: 0.6
s Typ.
D
High Output Current:
15mA Min.
D
Single Capacitor Compensation
D
Offset Null Terminals
Absolute Maximum Ratings:
Supply Voltage (Between V+ and V terminals)
36V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Input Voltage
12V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage to GND (Note 1)
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offset Terminal to V Terminal Voltage
0.5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Current (Note 2)
50mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Device Dissipation (Up to T
A
= +55
C), P
D
630mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above T
A
= +55
C
6.67mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
55
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature range. T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering), T
L
At distance 1/16"
1/32" (1.59
0.79mm) from case for 10s max
+265
C
. . . . . . . . . . . . . . . .
Note 1. If the supply voltage is less than
15 volts, the maximum input voltage to GND is equal to
the supply voltage.
Note 2. The NTE871 does not contain circuitry to protect against short circuits in the output.
Electrical Characteristics: (T
A
= +25
C, V
CC
=
15V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Static
Input Offset Voltage
V
IO
V
O
= 0
0.1V
1
5
mV
Input Bias Current
I
IB
V
O
= 0
0.1V
0.7
2.0
A
Input Offset Current
I
IO
V
O
= 0
0.1V
0.05
0.4
A
LowFrequency OpenLoop
Voltage Gain
A
OL
V
O
=
1V Peak, F = 1kHz, Note 3
56
61
dB
CommonMode Input Voltage
Range
V
ICR
CMRR
76dB
12
+14
13
V
CommonMode Rejection Ratio
CMRR
V
I
Common Mode =
12V
76
90
dB
Maximum Output Voltage:
Positive
V
OM
+
Differential Input Voltage = 0
0.1V
+9
+11
V
Negative
V
OM
R
L
= 2k
9
11
Maximum Output Current:
Positive
V
OM
+
Differential Input Voltage = 0
0.1V
+15
+30
mA
Negative
V
OM
R
L
= 250k
15
30
Supply Current
I+
V
O
= 0
0.1V, R
L
10k
8.5
10.5
mA
Power Supply Rejection Ratio
PSRR
V+ =
1V,
V =
1V
60
70
dB
Dynamic
UnityGain Crossover Frequency
f
T
C
C
= 0, V
O
= 0.3V
PP
38
MHz
1MHz OpenLoop Voltage Gain
A
OL
f = 1MHz, C
C
= 0, V
O
= 10V
PP
36
42
dB
Slew Rate
20dB Amplifier
SR
A
V
= 10, C
C
= 0, V
I
= 1V (Pulse)
50
70
V/
s
Follower Mode
A
V
= 1, C
C
= 10pF, V
I
= 10V (Pulse)
25
Power Bandwidth
20dB Amplifier
PBW
(Note 4)
A
V
= 10, C
C
= 0, V
O
= 10V
PP
0.8
1.2
MHz
Follower Mode
A
V
= 1, C
C
= 10pF, V
O
= 10V
PP
0.4
OpenLoop Differential Impedance
Z
I
F = 1MHz
30
k
OpenLoop Output Impedance
Z
O
F = 1MHz
110
Wideband Noise Voltage
Referred to Input
e
N
(Total)
BW = 1MHz, R
S
= 1k
8
V
RMS
Setting Time
(To Within
50mV of 9V
Output Swing)
t
s
R
L
= 2k
, C
L
= 20pF
0.6
s
Note 3. Lowfrequency dynamic characteristics.
Note 4. Power Bandwidth =
Slew Rate
V
O
(PP)
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