TL081.pdf

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TL081
General purpose JFET single operational amplifiers
Features
■
■
■
■
■
■
■
Wide common-mode (up to V
CC+
) and
differential voltage range
Low input bias and offset current
Output short-circuit protection
High input impedance JFET input stage
Internal frequency compensation
Latch-up free operation
High slew rate: 16 V/µs (typ)
D
SO-8
(Plastic micropackage)
Pin connections
(top view)
N
DIP8
(Plastic package)
Description
The TL081, TL081A and TL081B are high-speed
JFET input single operational amplifiers
incorporating well matched, high-voltage JFET
and bipolar transistors in a monolithic integrated
circuit.
The devices feature high slew rates, low input
bias and offset currents, and low offset voltage
temperature coefficient.
1 - Offset null 1
2 - Inverting input
3 - Non-inverting input
4 - V
CC-
5 - Offset null 2
6 - Output
7 - V
CC+
8 - N.C.
June 2008
Rev 3
1/15
www.st.com
15
Schematic diagram
TL081
1
Schematic diagram
Figure 1.
Schematic diagram
V
CC
Non-inverting
input
Inverting
input
100
Ω
200
Ω
Output
100
Ω
30k
8.2k
1.3k
V
CC
35k
1.3k
35k
100
Ω
Offset Null1
Offset Null2
Figure 2.
Input offset voltage null circuit
TL081
N1
N2
100k
Ω
V
CC
2/15
TL081
Absolute maximum ratings
2
Absolute maximum ratings
Table 1.
Symbol
V
CC
V
in
V
id
P
tot
Absolute maximum ratings
Parameter
Supply voltage
(1)
Input voltage
(2)
Differential input voltage
(3)
Power dissipation
Output short-circuit duration
(4)
TL081I, AI, BI
±18
±15
±30
680
Infinite
-65 to +150
°C
TL081C, AC,
BC
Unit
V
V
V
mW
T
stg
Storage temperature range
Thermal resistance junction to
ambient
(5) (6)
SO-8
DIP8
Thermal resistance junction to case
(5) (6)
SO-8
DIP8
HBM: human body model
(7)
R
thja
125
85
40
41
500
200
1.5
°C/W
R
thjc
°C/W
V
V
kV
ESD
MM: machine model
(8)
CDM: charged device model
(9)
1. All voltage values, except differential voltage, are with respect to the zero reference level (ground) of the
supply voltages where the zero reference level is the midpoint between V
CC+
and V
CC-
.
2. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts,
whichever is less.
3. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
4. The output may be shorted to ground or to either supply. Temperature and/or supply voltages must be
limited to ensure that the dissipation rating is not exceeded.
5. Short-circuits can cause excessive heating and destructive dissipation.
6. Rth are typical values.
7. Human body model: 100 pF discharged through a 1.5kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
8. Machine model: a 200 pF cap is charged to the specified voltage, then discharged directly between two
pins of the device with no external series resistor (internal resistor < 5
Ω),
done for all couples of pin
combinations with other pins floating.
9. Charged device model: all pins plus package are charged together to the specified voltage and then
discharged directly to the ground.
Table 2.
Symbol
V
CC
T
oper
Operating conditions
Parameter
Supply voltage range
Operating free-air temperature range
-40 to +105
TL081I, AI, BI
TL081C, AC, BC
6 to 36
0 to +70
Unit
V
°C
3/15
Electrical characteristics
TL081
3
Table 3.
Symbol
Electrical characteristics
V
CC
= ±15V, T
amb
= +25°C (unless otherwise specified)
Parameter
TL081I, AC, AI, BC,
BI
Min.
Input offset voltage (R
s
=
50Ω)
TL081
T
amb
= +25°C
TL081A
TL081B
T
min
≤
T
amb
≤
T
max
TL081
TL081A
TL081B
Input offset voltage drift
Input offset current
(1)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Input bias current
(1)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Large signal voltage gain
(R
L
= 2kΩ V
o
= ±10V)
,
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Supply voltage rejection ratio (R
S
=
50Ω)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Supply current, no load
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Input common mode voltage range
Common mode rejection ratio (R
S
=
50Ω)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Output short-circuit current
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Output voltage swing
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
R
L
= 2kΩ
R
L
= 10kΩ
R
L
= 2kΩ
R
L
= 10kΩ
±11
50
25
80
80
Typ.
Max.
Min.
TL081C
Unit
Typ.
Max.
V
io
3
3
1
10
6
3
13
7
5
3
10
mV
13
DV
io
I
io
10
5
100
4
200
20
25
15
70
70
2.5
2.5
±11
10
5
100
10
400
20
µV/°C
pA
nA
nA
I
ib
20
20
A
vd
200
200
V/mV
SVR
86
86
dB
I
CC
1.4
+15
-12
86
1.4
+15
-12
86
2.5
2.5
mA
V
icm
V
CMR
80
80
10
10
10
12
10
12
8
70
70
60
60
10
10
10
12
10
12
8
dB
I
os
40
40
60
60
mA
±V
opp
12
13.5
12
13.5
V
SR
Slew rate (T
amb
= +25°C)
,
V
in
= 10V, R
L
= 2kΩ C
L
= 100pF, unity gain
16
16
V/µs
4/15
TL081
Table 3.
Symbol
Electrical characteristics
V
CC
= ±15V, T
amb
= +25°C (unless otherwise specified) (continued)
Parameter
TL081I, AC, AI, BC,
BI
Min.
Typ.
0.1
10
2.5
4
10
12
0.01
2.5
Max.
Min.
TL081C
Unit
Typ.
0.1
10
4
10
12
0.01
Max.
µs
%
MHz
Ω
%
t
r
K
ov
GBP
R
i
THD
Rise time (T
amb
= +25°C)
,
V
in
= 20mV, R
L
= 2kΩ C
L
= 100pF, unity gain
Overshoot (T
amb
= +25°C)
,
V
in
= 20mV, R
L
= 2kΩ C
L
= 100pF, unity gain
Gain bandwidth product (T
amb
= +25°C)
,
V
in
= 10mV, R
L
= 2kΩ C
L
= 100pF, F= 100kHz
Input resistance
Total harmonic distortion (T
amb
= +25°C),
,C
F= 1kHz, R
L
= 2kΩ
L
= 100pF, A
v
= 20dB,
V
o
= 2V
pp
Equivalent input noise voltage
R
S
=
100Ω, F= 1kHz
Phase margin
e
n
∅m
15
45
15
45
nV
-----------
-
Hz
degrees
1. The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction
temperature.
5/15

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