NTE725
Integrated Circuit
Dual Low Noise Preamp/OP Amp
Description:
The NTE725 consists of two identical highgain operational amplifiers constructed on a single chip.
These 3stage amplifiers use Class A PNP transistor output stages with uncommitted collectors. This
enables a variety of loads to be employed for general purpose applications from DC to 10MHz, where
two high performance operation amplifiers are required. In addition, the outputs may be wiredOR
for use as a dual comparator or they may function as diodes in low thershold rectifying circuits such
as absolute value amplifiers, peak detectors, etc.
Features:
D
Single or Dual Supply Operation
D
Low Power Consumption
D
High Gain
D
Large Common Mode Range: +11V, 13V
D
Excellent Gain Stability vs. Supply Voltage
D
No LatchUp
D
Output Short Circuit Protected
Absolute Maximum Ratings:
Supply Voltage
18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation
650mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Input Voltage
5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage (Note 1)
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Short Circuit Duration (T
A
= +25
C, Note 2)
30sec
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range
55
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature (During Soldering, 60sec)
+260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. For supply voltages less than
15V, the absolute maximum input voltage is equal to the supply
voltage.
Note 2. Short circit may be to GND or either supply.
Electrical Characteristics: (T
A
= +25
C, V+ =
15V, R
L
= 5k
to Pin7 unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Unit
Input Offset Voltage
R
S
= 200
1.0
6.0
mV
V+ =
4V, R
L
= 10k
to Pin7, R
S
= 200
1.0
6.0
mV
Input Offset Current
50
1000
nA
V+ =
4V, R
L
= 10k
to Pin7
50
1000
nA
Input Bias Current
0.3
2.0
A
V+ =
4V, R
L
= 10k
to Pin7
300
A
Input Resistance
37
150
k
Large Signal Voltage Gain
V
OUT
=
10V
6.5k
20k
V/V
V+ =
4V, R
L
= 10k
to Pin7, V
OUT
=
2V
2.5k
15k
V/V
Positive Output Voltage Swing
+12
+13
V
V+ =
4V, R
L
= 10k
to Pin7
+2.5
+2.8
V
Negative Output Voltage Swing
14
15
V
V+ =
4V, R
L
= 10k
to Pin7
3.6
4.0
V
Output Resistance
f = 1kHz
5.0
k
Common Mode Rejection Ratio
R
S
= 200
, V
IN
= +11.5v to 13.5V
70
90
dB
Supply Voltage Rejection Ratio
R
S
= 200
50
V/V
Input Voltage Range
10
+11
V
Internal Power Dissipation
V+ =
4V, R
L
= 10k
to Pin7, V
OUT
= 0
20
mW
Supply Current
V
OUT
= 0
9
14
mA
V+ =
4V, R
L
= 10k
to Pin7, V
OUT
= 0
2.5
mA
Broadband Noise Figure
R
S
= 10k
, BW = 10Hz to 10kHz
2.0
dB
TurnOn Delay
Open Loop, V
IN
=
20mV
0.2
s
TurnOff Delay
Open Loop, V
IN
=
20mV
0.3
s
Slew Rate (Unity Gain)
C
1
= 0.02
F, R
1
= 33
, C
2
= 10pF
1.0
V/
s
Channel Separation
R
S
= 1k
, f = 10kHz
140
dB
(+) V
CC
Pin Connection Diagram
() V
CC
NonInvert Input B
Output B
1
2
3
4
Output A
Output Lag A
Input Lag A
Input Lag A
5
NonInvert Input A
6
Inverting input A
7
14
13
12
11
Output Lag B
Input Lag B
10
Input Lag B
9
8
Inverting Input B
PDF 
ZIP