June 2008 Rev 3 1/15
15
TL081
General purpose JFET single operational amplifiers
Features
Wide common-mode (up to VCC+) 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)
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.
N
DIP8
(Plastic package)
D
SO-8
(Plastic micropackage)
1 - Offset null 1
2 - Inverting input
3 - Non-inverting input
4 - VCC-
5 - Offset null 2
6 - Output
7 - VCC+
8 - N.C.
Pin connections
(top view)
www.st.com
Schematic diagram TL081
2/15
1 Schematic diagram
Figure 1. Schematic diagram
Figure 2. Input offset voltage null circuit
Output
Non-inverting
input
Inverting
input
V
CC
V
CC
100
Ω
1.3k
30k
35k 35k 100
Ω
1.3k
8.2k
Offset Null1 Offset Null2
100
Ω
200
Ω
N1 N2
TL081
100k
Ω
V
CC
TL081 Absolute maximum ratings
3/15
2 Absolute maximum ratings
Table 1. Absolute maximum ratings
Symbol Parameter TL081I, AI, BI TL081C, AC,
BC Unit
VCC Supply voltage (1)
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 VCC+ and VCC-.
±18 V
Vin Input voltage (2)
2. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts,
whichever is less.
±15 V
Vid Differential input voltage (3)
3. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
±30 V
Ptot Power dissipation 680 mW
Output short-circuit duration (4)
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.
Infinite
Tstg Storage temperature range -65 to +150 °C
Rthja
Thermal resistance junction to
ambient(5) (6)
SO-8
DIP8
5. Short-circuits can cause excessive heating and destructive dissipation.
6. Rth are typical values.
125
85
°C/W
Rthjc
Thermal resistance junction to case(5) (6)
SO-8
DIP8
40
41
°C/W
ESD
HBM: human body model(7)
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.
500 V
MM: machine model(8)
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.
200 V
CDM: charged device model(9)
9. Charged device model: all pins plus package are charged together to the specified voltage and then
discharged directly to the ground.
1.5 kV
Table 2. Operating conditions
Symbol Parameter TL081I, AI, BI TL081C, AC, BC Unit
VCC Supply voltage range 6 to 36 V
Toper Operating free-air temperature range -40 to +105 0 to +70 °C
Electrical characteristics TL081
4/15
3 Electrical characteristics
Table 3. VCC = ±15V, Tamb = +25°C (unless otherwise specified)
Symbol Parameter
TL081I, AC, AI, BC,
BI TL081C
Unit
Min. Typ. Max. Min. Typ. Max.
Vio
Input offset voltage (Rs = 50Ω)
Tamb = +25°C TL081
TL081A
TL081B
Tmin Tamb Tmax TL081
TL081A
TL081B
3
3
1
10
6
3
13
7
5
310
13
mV
DVio Input offset voltage drift 10 10 µV/°C
Iio
Input offset current (1)
Tamb = +25°C
Tmin Tamb Tmax
5 100
4
5100
10
pA
nA
Iib
Input bias current (1)
Tamb = +25°C
Tmin Tamb Tmax
20 200
20
20 400
20
nA
Avd
Large signal voltage gain (RL = 2kΩ, Vo = ±10V)
Tamb = +25°C
Tmin Tamb Tmax
50
25
200 25
15
200 V/mV
SVR
Supply voltage rejection ratio (RS = 50Ω)
Tamb = +25°C
Tmin Tamb Tmax
80
80
86 70
70
86 dB
ICC
Supply current, no load
Tamb = +25°C
Tmin Tamb Tmax
1.4 2.5
2.5
1.4 2.5
2.5
mA
Vicm Input common mode voltage range ±11 +15
-12 ±11 +15
-12 V
CMR
Common mode rejection ratio (RS = 50Ω)
Tamb = +25°C
Tmin Tamb Tmax
80
80
86 70
70
86 dB
Ios
Output short-circuit current
Tamb = +25°C
Tmin Tamb Tmax
10
10
40 60
60
10
10
40 60
60
mA
±Vopp
Output voltage swing
Tamb = +25°C RL = 2kΩ
RL = 10kΩ
Tmin Tamb Tmax R
L = 2kΩ
RL = 10kΩ
10
12
10
12
12
13.5
10
12
10
12
12
13.5 V
SR Slew rate (Tamb = +25°C)
Vin = 10V, RL = 2kΩ, CL = 100pF, unity gain 816 816 V/µs
TL081 Electrical characteristics
5/15
tr
Rise time (Tamb = +25°C)
Vin = 20mV, RL = 2kΩ, CL = 100pF, unity gain 0.1 0.1 µs
Kov
Overshoot (Tamb = +25°C)
Vin = 20mV, RL = 2kΩ, CL = 100pF, unity gain 10 10 %
GBP Gain bandwidth product (Tamb = +25°C)
Vin = 10mV, RL = 2kΩ, CL = 100pF, F= 100kHz 2.5 4 2.5 4 MHz
RiInput resistance 1012 1012 Ω
THD
Total harmonic distortion (Tamb = +25°C),
F= 1kHz, RL = 2kΩ,CL = 100pF, Av = 20dB,
Vo = 2Vpp
0.01 0.01 %
en
Equivalent input noise voltage
RS = 100Ω, F= 1kHz 15 15
m Phase margin 45 45 degrees
1. The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction
temperature.
Table 3. VCC = ±15V, Tamb = +25°C (unless otherwise specified) (continued)
Symbol Parameter
TL081I, AC, AI, BC,
BI TL081C
Unit
Min. Typ. Max. Min. Typ. Max.
nV
Hz
------------
Electrical characteristics TL081
6/15
Figure 3. Maximum peak-to-peak output
voltage versus frequency
Figure 4. Maximum peak-to-peak output
voltage versus frequency
Figure 5. Maximum peak-to-peak output
voltage versus frequency
Figure 6. Maximum peak-to-peak output
voltage versus free air temperature
Figure 7. Maximum peak-to-peak output
voltage versus load resistance
Figure 8. Maximum peak-to-peak output
voltage versus supply voltage
30
25
20
15
10
5
02
4
6810
12 14 16
MAXIMUM PEAK-TO-PEAK OUTPUT
VOLTAGE (V)
R
L
= 10 k
Ω
T
amb
= +25˚C
SUPPLY VOLTAGE (
V)
TL081 Electrical characteristics
7/15
Figure 9. Input bias current versus free air
temperature
Figure 10. Large signal differential voltage
amplification versus free air temp
100
10
1
0.1
0.01
INPUT BIAS CURRENT (nA)
-50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
V
CC
=15V
1000
400
200
100
20
40
10
4
2
1
DIFFERENTIAL VOLTAGE
AMPLIFICATION (V/V)
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
R
L
= 2k
Ω
V
O
= 10V
V
CC
= 15V
Figure 11. Large signal differential voltage
amplification and phase shift
versus frequency
Figure 12. Total power dissipation versus free
air temperature
FREQUENCY (Hz)
DIFFERENTIAL VOLTAGE
AMPLIFICATION (V/V)
100
10
100 1K 10K 100K 10M1M
1
DIFFERENTIAL
VOLTAGE
AMPLIFICATION
(left scale)
180
9
0
0
R = 2k
W
C = 100pF
V = 15V
T = +125°C
L
L
CC
amb
PHASE SHIFT
(right scale)
250
225
200
175
150
125
100
75
50
25
0
TOTAL POWER DISSIPATION (mW)
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
V
CC
= 15V
No signal
No load
Figure 13. Supply current per amplifier versus
free air temperature
Figure 14. Supply current per amplifier versus
supply voltage
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
SUPPLY CURRENT (mA)
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
V
CC
= 15V
No signal
No load
Electrical characteristics TL081
8/15
Figure 15. Common mode rejection ratio
versus free air temperature
Figure 16. Equivalent input noise voltage
versus frequency
89
88
87
86
85
84
-50 -25 0 25 50 75 100 125
COMMON MODE MODE REJECTION
RATIO (dB)
TEMPERATURE (˚C)
83-75
R
L
= 10 k
Ω
= 15V
V
CC
70
60
50
40
30
20
10
0
EQUIVALENT INPUT NOISE
VOLTAGE (nV/VHz)
10 40 100 400 1k 4k 10k 40k 100k
FREQUENCY (Hz)
A
V
= 10
R
S
= 100
Ω
T
amb
= +25˚C
V
CC
= 15V
Figure 17. Output voltage versus elapsed time Figure 18. Total harmonic distortion versus
frequency
Figure 19. Voltage follower large signal pulse
response
t
r
28
24
20
16
12
8
4
0
-4
OUTPUT VOLTAGE (mV)
0
0.1 0.2 0.3 0.4
0.5
0.6 0.7
TIME (
μ
s)
10%
90%
OVERSHOOT
R
L= 2k
Ω
T
amb = +25˚C
VCC = 15V
1
0.4
0.1
0.04
0.01
0.004
0.001
TOTAL HARMONIC DISTORTION
(%)
100 400 1k 4k 10k 40k 100k
FREQUENCY (Hz)
A
V
= 1
T
amb
= +25˚C
V
CC
= 15V
= 6V
V
O(rms)
A
V
= 1
T
amb
= +25˚C
= 6V
V
O(rms)
V
CC
= 15V
6
4
2
0
-2
-4
0 0.5 1 1.5 2 2.5 3 3.
5
INPUT AND OUTPUT VOLTAGES
(V)
TIME (
m
s)
-6
= 15V
V
CC
R
L
= 2 k
W
= 100pF
C
L
T
amb
= +25°C
OUTPUT
INPUT
TL081 Parameter measurement information
9/15
4 Parameter measurement information
Figure 20. Voltage follower Figure 21. Gain-of-10 inverting amplifier
Typical applications TL081
10/15
5 Typical applications
Figure 22. 0.5 Hz square wave oscillator
Figure 23. High Q notch filter
-
TL081
1k
Ω
R
F
= 100k
Ω
9.1k
Ω
3.3k
Ω
+15V
-15V
3.3k
Ω
C = 3.3
μ
F
F
f =
osc
1
F
2 x R
F
C
TL081 Package information
11/15
6 Package information
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Package information TL081
12/15
6.1 DIP 8 package information
Figure 24. DIP8 package mechanical drawing
Table 4. DIP8 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A5.330.210
A1 0.38 0.015
A2 2.92 3.30 4.95 0.115 0.130 0.195
b 0.36 0.46 0.56 0.014 0.018 0.022
b2 1.14 1.52 1.78 0.045 0.060 0.070
c 0.20 0.25 0.36 0.008 0.010 0.014
D 9.02 9.27 10.16 0.355 0.365 0.400
E 7.62 7.87 8.26 0.300 0.310 0.325
E1 6.10 6.35 7.11 0.240 0.250 0.280
e 2.54 0.100
eA 7.62 0.300
eB 10.92 0.430
L 2.92 3.30 3.81 0.115 0.130 0.150
TL081 Package information
13/15
6.2 SO-8 package information
Figure 25. SO-8 package mechanical drawing
Table 5. SO-8 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A1.750.069
A1 0.10 0.25 0.004 0.010
A2 1.25 0.049
b 0.28 0.48 0.011 0.019
c 0.17 0.23 0.007 0.010
D 4.80 4.90 5.00 0.189 0.193 0.197
E 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e 1.27 0.050
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
k1° 8°1° 8°
ccc 0.10 0.004
Ordering information TL081
14/15
7 Ordering information
8 Revision history
Table 6. Order codes
Order code Temperature
range Package Packing Marking
TL081IN
TL081AIN
TL081BIN
-40°C, +105°C
DIP8 Tube
TL081IN
TL081AIN
TL081BIN
TL081ID/IDT
TL081AID/AIDT
TL081BID/BIDT
SO-8 Tub e o r
tape & reel
081I
081AI
081BI
TL081IYD/DT(1)
TL081AIYD/DT(1)
TL081BIYD/DT(1)
1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent are on-going.
SO-8
(Automotive grade)
Tub e o r
tape & reel
081IY
081AIY
081BIY
TL081CN
TL081ACN
TL081BCN 0°C, +70°C
DIP8 Tube
TL081CN
TL081ACN
TL081BCN
TL081CD/CDT
TL081ACD/ACDT
TL081BCD/BCDT
SO-8 Tub e o r
tape & reel
081C
081AC
081BC
Table 7. Document revision history
Date Revision Changes
30-Apr-2001 1 Initial release.
27-Jul-2007 2
Added values for Rthja and Rthjc in Table 1: Absolute maximum
ratings.
Added Table 2: Operating conditions.
Added automotive grade part numbers in Table 6: Order codes.
Format update.
27-Jun-2008 3
Removed information concerning military temperature range
(TL081Mx, TL081AMx, TL081BMx).
Added missing order codes for automotive grade products and
updated footnote in Table 6: Order codes.
TL081
15/15
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