TL081 Reference Tables, Pins & Specifications

Pin reference

Signal names, electrical functions and connection guidance

PDIP-8

Physical pin numbers8 pins

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TL081 pin functions and connections
Signal	Type	Function & connection
NULL1	Offset null	Optional input-offset trim connection. Connection guidance Leave open for the illustrated circuit. Use the ST offset-adjustment network if trimming is required.
IN−	Inverting input	Input used by the feedback network. Connection guidance Join the 90 kΩ feedback resistor and 10 kΩ ground resistor.
IN+	Non-inverting input	JFET signal input. Connection guidance Apply VIN relative to the supply midpoint. Input bias current increases strongly with temperature.
V−	Negative supply	Negative power rail. Connection guidance Connect to −15 V; bypass to signal ground.
NULL2	Offset null	Second optional trim connection. Connection guidance Leave open in the example.
OUT	Analog output	Output of the internally compensated amplifier. Connection guidance Connect the feedback resistor and a high-impedance meter. Avoid heavy or capacitive loading without checking stability and output swing.
V+	Positive supply	Positive power rail. Connection guidance Connect to +15 V; bypass to signal ground.
NC	No connection	Unused package contact. Connection guidance Leave unconnected.

ST TL081C grade

Manufacturer-referenced values5 parameters

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Parameter	Value	Conditions / notes
Total supply span	6–36 V	V+ minus V−
Ambient temperature	0 to +70°C	C-grade devices
Reference test supply	±15 V	Used for electrical values unless stated
Common-mode range	±11 V minimum; −12 to +15 V typical	±15 V supply; see manufacturer conditions
Example input	0.20 V	Relative to the 0 V midpoint

A typical range is not a guaranteed operating boundary. Use the specified minimum range for design margin.

±15 V · 25°C · TL081C

Manufacturer-referenced values5 parameters

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Parameter	Value	Conditions / notes
Input offset voltage	3 mV typical; 10 mV maximum	RS = 50 Ω
Input resistance	1 TΩ typical	Manufacturer Ri characteristic
Input offset current	5 pA typical; 100 pA maximum	Difference between input currents at 25°C
No-load supply current	1.4 mA typical; 2.5 mA maximum	Per amplifier
Open-loop gain	200 V/mV typical; 25 minimum	RL = 2 kΩ; VO = ±10 V

Bias leakage rises rapidly with temperature; room-temperature leakage values do not apply over the full range.

±15 V · specified tests

Manufacturer-referenced values5 parameters

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Parameter	Value	Conditions / notes
Output swing at RL = 10 kΩ	±13.5 V typical; ±12 V minimum	25°C
Output swing at RL = 2 kΩ	±12 V typical; ±10 V minimum	25°C
Gain-bandwidth product	4 MHz typical; 2.5 MHz minimum	RL = 2 kΩ; CL = 100 pF; f = 100 kHz
Slew rate	16 V/µs typical; 8 V/µs minimum	Unity gain; 10 V input step; RL = 2 kΩ; CL = 100 pF
Input noise density	15 nV/√Hz typical	RS = 100 Ω; 1 kHz

Do not infer output current or stability from bandwidth alone.

Split-supply non-inverting stage

Manufacturer-referenced values7 parameters

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Parameter	Value	Conditions / notes
Power rails	+15 V / −15 V	Pins 7 and 4
Input	0.20 V	IN+ pin 3
Feedback	90 kΩ	OUT pin 6 to IN− pin 2
Ground resistor	10 kΩ	IN− pin 2 to 0 V
Ideal gain / output	10 V/V / 2.00 V	1 + 90 / 10
Bypass	100 nF per rail	Each rail to the 0 V midpoint
Trim and NC	Pins 1, 5, 8 open	No offset-trim network in this circuit

The meter is high impedance. Real output includes offset, noise and resistor errors.

TL081CN · PDIP-8

Manufacturer-referenced values6 parameters

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Parameter	Value	Conditions / notes
Pitch	2.54 mm	Through-hole
Inputs	IN− 2; IN+ 3	JFET differential pair
Output	6	Single analog channel
Power	V− 4; V+ 7	0 V is the external supply midpoint
Offset trim	1 and 5	Optional; consult the exact manufacturer circuit
No connection	8	Leave open

Do not confuse TL081’s single-amplifier pinout with the dual TL072 pinout.