NTE725
Integrated Circuit
Dual Low Noise Preamp/OP Amp
Description:
The NTE725 consists of two identical high–gain operational amplifiers constructed on a single chip.
These 3–stage 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 wired–OR
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 Latch–Up
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
= 5kΩ to Pin7 unless otherwise specified)
Parameter
Input Offset Voltage
Input Offset Current
V+ =
±4V,
R
L
= 10kΩ to Pin7
Input Bias Current
V+ =
±4V,
R
L
= 10kΩ to Pin7
Input Resistance
Large Signal Voltage Gain
Positive Output Voltage Swing
V+ =
±4V,
R
L
= 10kΩ to Pin7
Negative Output Voltage Swing
V+ =
±4V,
R
L
= 10kΩ to Pin7
Output Resistance
Common Mode Rejection Ratio
Supply Voltage Rejection Ratio
Input Voltage Range
Internal Power Dissipation
Supply Current
Broadband Noise Figure
Turn–On Delay
Turn–Off Delay
Slew Rate (Unity Gain)
Channel Separation
V+ =
±4V,
R
L
= 10kΩ to Pin7, V
OUT
= 0
V
OUT
= 0
V+ =
±4V,
R
L
= 10kΩ to Pin7, V
OUT
= 0
R
S
= 10kΩ, BW = 10Hz to 10kHz
Open Loop, V
IN
=
±20mV
Open Loop, V
IN
=
±20mV
C
1
= 0.02µF, R
1
= 33Ω, C
2
= 10pF
R
S
= 1kΩ, f = 10kHz
Pin Connection Diagram
Test Conditions
R
S
= 200Ω
V+ =
±4V,
R
L
= 10kΩ to Pin7, R
S
= 200Ω
Min
–
–
–
–
–
–
37
6.5k
2.5k
+12
–14
–3.6
–
70
–
–10
–
–
–
–
–
–
–
–
Typ
1.0
1.0
50
50
0.3
300
150
20k
15k
+13
–15
–4.0
5.0
90
50
–
20
9
2.5
2.0
0.2
0.3
1.0
140
Max
6.0
6.0
1000
1000
2.0
–
–
–
–
–
–
–
–
–
–
–
+11
–
14
–
–
–
–
–
–
Unit
mV
mV
nA
nA
µA
µA
kΩ
V/V
V/V
V
V
V
V
kΩ
dB
µV/V
V
mW
mA
mA
dB
µs
µs
V/µs
dB
V
OUT
=
±10V
V+ =
±4V,
R
L
= 10kΩ to Pin7, V
OUT
=
±2V
+2.5 +2.8
f = 1kHz
R
S
= 200Ω, V
IN
= +11.5v to –13.5V
R
S
= 200Ω
Output A
Output Lag A
Input Lag A
Input Lag A
Non–Invert Input A
Inverting input A
(–) V
CC
1
2
3
4
5
6
7
14
(+) V
CC
13
Output B
12
Output Lag B
11
Input Lag B
10
Input Lag B
9
8
Non–Invert Input B
Inverting Input B
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