Real View
LM358Dual operational amplifier
Give a small analog signal a useful gain.
LM358 contains two independent operational amplifiers in one eight-pin package. Both channels share the supply pins. Negative feedback sets a useful closed-loop gain. The inputs can operate near ground, but the output does not reach the positive supply rail. This page covers the classic LM358P in PDIP-8 and LM358D in SOIC-8.
8Physical pins
LM358PPDIP-8
Manufacturer-referencedTexas Instruments
Pin diagram
Select a pin to explore its connection
Highlight
LM358PPDIP-8Top view
LM358DSOIC-8Top view
Click a lead or use the arrow keys. Top view
PIN 1 · Outputs
OutputOUT1
Function
Amplifier A output.
How to connect
Feed back to IN1− through Rf; connect the measured output here.
Electrical note
Allow output headroom; do not treat it as a rail-to-rail output.
PIN 2 · Signal inputs
Inverting inputIN1−
Function
Amplifier A feedback input.
How to connect
Connect the junction of Rf and Rg here.
Electrical note
Negative feedback controls the gain while the amplifier is operating linearly.
PIN 3 · Signal inputs
Non-inverting inputIN1+
Function
Amplifier A signal input.
How to connect
Connect the input signal and its common ground.
Electrical note
Keep within the recommended common-mode range.
PIN 4 · Supply
Supply returnV−
Function
Lowest supply potential for both channels.
How to connect
Connect to ground in the illustrated single-supply circuit.
PIN 5 · Signal inputs
Non-inverting inputIN2+
Function
Amplifier B signal input.
How to connect
In this example, connect to VIN so the spare channel acts as a buffer.
PIN 6 · Signal inputs
Inverting inputIN2−
Function
Amplifier B feedback input.
How to connect
Connect directly to OUT2 for a unity-gain follower.
PIN 7 · Outputs
OutputOUT2
Function
Amplifier B output.
How to connect
Connect to IN2−; leave the buffered output otherwise unloaded.
Electrical note
Do not tie the two outputs together.
PIN 8 · Supply
Positive supplyV+
Function
Highest supply potential for both channels.
How to connect
Connect to +5 V and place a 100 nF bypass capacitor to pin 4 nearby.
Key specifications
One package, two signal paths. Set their gains with external feedback.
Recommended supply3–30 V
Gain-bandwidth product0.7 MHz · typical
Ambient range0–70 °C
Independent amplifiers2 channels
Package details
LM358P · PDIP-8
| Property | Details |
|---|---|
| Manufacturer | Texas Instruments |
| Part number | LM358P |
| Package | PDIP-8 |
| Connections | 8 pins |
| Mounting | Through-hole |
| Lead pitch | 2.54 mm |
| Package code | P |
| Thermal reference | Board-dependent; see TI thermal table |
Operating conditions
Classic LM358P / LM358D
Manufacturer specifications 4 parameters
Scroll sideways to see all columns.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Supply difference | 3–30 V | Recommended operating range |
| Ambient temperature | 0–70°C | LM358 grade |
| Input common-mode range | V− to V+ − 2 V | Recommended operating conditions |
| Supply absolute maximum | 32 V | Stress rating, not an operating target |
No specifications match. Try a parameter name or a unit.
TI SLOS068AB, sections 5.1 and 5.3.
Electrical characteristics
Typical values are not production guarantees
Manufacturer specifications 7 parameters
Scroll sideways to see all columns.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Gain-bandwidth product | 0.7 MHz typical | Classic LM358 |
| Slew rate | 0.3 V/µs typical | Unity gain |
| Input offset voltage | 3 mV typical; 7 mV maximum | 25°C; see manufacturer test conditions |
| Input bias current | 20 nA typical magnitude | 25°C |
| Supply current | 350 µA typical per channel | 5 V; unloaded; 0–70°C test row |
| High-side output headroom | 1.5 V typical | 5 V supply, RL ≥ 2 kΩ |
| Near-ground output | 5 mV typical; 20 mV maximum | 5 V; RL ≤ 10 kΩ; 0–70°C |
No specifications match. Try a parameter name or a unit.
TI SLOS068AB, section 5.7. Conditions differ between rows; consult the PDF before selecting a part.
Gain and example readings
Non-inverting DC example
Manufacturer specifications 5 parameters
Scroll sideways to see all columns.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Closed-loop gain | 1 + Rf / Rg | Within the linear operating region |
| Example resistors | Rf = 20 kΩ; Rg = 10 kΩ | Gain = 3 |
| Example input / ideal output | 0.50 V / 1.50 V | Calculated, not a measured result |
| Explorer clipping ceiling | 3.50 V | Illustrative 5 V − 1.5 V headroom |
| Explorer input limit | 3.00 V | 5 V − 2 V recommended common-mode headroom |
No specifications match. Try a parameter name or a unit.
The explorer uses a fixed DC headroom approximation. It omits offset, bias, noise, frequency, temperature and load-dependent effects.
Package reference
LM358P · PDIP-8
Manufacturer specifications 4 parameters
Scroll sideways to see all columns.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Mounting | Through-hole | Selected physical package |
| Lead pitch | 2.54 mm | Check land pattern dimensions before PCB manufacture |
| Pin mapping | 8 numbered pins | Same functions in PDIP-8 and SOIC-8 |
| Orientation | Top view | Use the notch / pin-1 marker |
No specifications match. Try a parameter name or a unit.
The package selector updates all four views together.
Connections by function
Select a pin for its function, connection guidance and electrical notes.
Outputs2 pins
Signal inputs4 pins
Supply2 pins
Outputs2 pins
Signal inputs4 pins
Supply2 pins
LM358 at a glance
Follow the labeled connections and functional stages
How it works
3 stages · Explore one step at a time
Compare the inputs
The amplifier responds to the difference between its + and − inputs. A small difference can produce a large output change without feedback.
Close the feedback loop
Rf returns part of OUT1 to IN1−. Rg connects that node to ground. In the linear region, the circuit settles with approximately equal input voltages.
Read the result
With Rf = 20 kΩ and Rg = 10 kΩ, the ideal gain is 3. An input of 0.50 V requests 1.50 V at the output. Raising the input eventually runs into the output headroom.
Step 1 of 3
LM358 in a circuit
A physical PDIP-8 package, two gain-setting resistors and clear signal wiring.
Connect it, step by step
Follow the component values and pin connections
Power and bypass
Connect V+ (8) to +5 V and V− (4) to ground. Place 100 nF between the rails near the IC.
Set channel A gain
Connect VIN to pin 3. Put 20 kΩ between pins 1 and 2, and 10 kΩ from pin 2 to ground. Measure at pin 1.
Keep channel B defined
Connect pin 5 to the same VIN and join pins 6 and 7. Channel B follows VIN with no extra load; its inputs are not left floating.
Try the amplifier
Change the input and feedback. See the gain and output respond.
Closed-loop gain—
Ideal output—
Estimated output—
Enable JavaScript to explore the amplifier.
Estimated outputIdeal gainInput outside recommended range
Gain = 1 + Rf / Rg · VOUT(ideal) = VIN × Gain
Illustrative DC model at 5 V with a light load: 3.50 V upper output and 0.02 V lower output. Real headroom depends on load, temperature and part variation. Offset, bandwidth, slew rate and noise are omitted; use the ProTech example for a running simulation.
Inside LM358
Two amplifiers, a shared supply and a controlled feedback path.
Explore the circuit
Select a stage to see its role and connections
Two separate channels
Channel A uses pins 1, 2 and 3. Channel B uses pins 5, 6 and 7. Their outputs are independent.
Shared supply
Pins 8 and 4 power both channels. Decouple the supply close to the package.
Feedback makes gain useful
External feedback controls the relationship between input and output. Compensation helps stability, while output swing and speed remain finite.
Selected packagePDIP-8LM358P
Physical connections8 pinsPackage-specific numbering
Reference collection5 tables20 parameters & pin functions
Pin reference
Signal names, electrical functions and connection guidance
Physical pin numbers8 pins
Scroll within the table to see all columns and rows.
| Pin | Signal | Type | Function & connection |
|---|---|---|---|
| OUT1 | Output | Amplifier A output.Connection guidanceFeed back to IN1− through Rf; connect the measured output here. Allow output headroom; do not treat it as a rail-to-rail output. | |
| IN1− | Inverting input | Amplifier A feedback input.Connection guidanceConnect the junction of Rf and Rg here. Negative feedback controls the gain while the amplifier is operating linearly. | |
| IN1+ | Non-inverting input | Amplifier A signal input.Connection guidanceConnect the input signal and its common ground. Keep within the recommended common-mode range. | |
| V− | Supply return | Lowest supply potential for both channels.Connection guidanceConnect to ground in the illustrated single-supply circuit. | |
| IN2+ | Non-inverting input | Amplifier B signal input.Connection guidanceIn this example, connect to VIN so the spare channel acts as a buffer. | |
| IN2− | Inverting input | Amplifier B feedback input.Connection guidanceConnect directly to OUT2 for a unity-gain follower. | |
| OUT2 | Output | Amplifier B output.Connection guidanceConnect to IN2−; leave the buffered output otherwise unloaded. Do not tie the two outputs together. | |
| V+ | Positive supply | Highest supply potential for both channels.Connection guidanceConnect to +5 V and place a 100 nF bypass capacitor to pin 4 nearby. |
No pins match these filters. Try another signal name or reset the filters.
Operating conditions
Classic LM358P / LM358D
Manufacturer-referenced values4 parameters
Scroll within the table to see all columns and rows.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Supply difference | 3–30 V | Recommended operating range |
| Ambient temperature | 0–70°C | LM358 grade |
| Input common-mode range | V− to V+ − 2 V | Recommended operating conditions |
| Supply absolute maximum | 32 V | Stress rating, not an operating target |
No specifications match. Try a parameter name or a unit.
TI SLOS068AB, sections 5.1 and 5.3.
Electrical characteristics
Typical values are not production guarantees
Manufacturer-referenced values7 parameters
Scroll within the table to see all columns and rows.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Gain-bandwidth product | 0.7 MHz typical | Classic LM358 |
| Slew rate | 0.3 V/µs typical | Unity gain |
| Input offset voltage | 3 mV typical; 7 mV maximum | 25°C; see manufacturer test conditions |
| Input bias current | 20 nA typical magnitude | 25°C |
| Supply current | 350 µA typical per channel | 5 V; unloaded; 0–70°C test row |
| High-side output headroom | 1.5 V typical | 5 V supply, RL ≥ 2 kΩ |
| Near-ground output | 5 mV typical; 20 mV maximum | 5 V; RL ≤ 10 kΩ; 0–70°C |
No specifications match. Try a parameter name or a unit.
TI SLOS068AB, section 5.7. Conditions differ between rows; consult the PDF before selecting a part.
Gain and example readings
Non-inverting DC example
Manufacturer-referenced values5 parameters
Scroll within the table to see all columns and rows.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Closed-loop gain | 1 + Rf / Rg | Within the linear operating region |
| Example resistors | Rf = 20 kΩ; Rg = 10 kΩ | Gain = 3 |
| Example input / ideal output | 0.50 V / 1.50 V | Calculated, not a measured result |
| Explorer clipping ceiling | 3.50 V | Illustrative 5 V − 1.5 V headroom |
| Explorer input limit | 3.00 V | 5 V − 2 V recommended common-mode headroom |
No specifications match. Try a parameter name or a unit.
The explorer uses a fixed DC headroom approximation. It omits offset, bias, noise, frequency, temperature and load-dependent effects.
Package reference
LM358P · PDIP-8
Manufacturer-referenced values4 parameters
Scroll within the table to see all columns and rows.
| Parameter | Value | Conditions / notes |
|---|---|---|
| Mounting | Through-hole | Selected physical package |
| Lead pitch | 2.54 mm | Check land pattern dimensions before PCB manufacture |
| Pin mapping | 8 numbered pins | Same functions in PDIP-8 and SOIC-8 |
| Orientation | Top view | Use the notch / pin-1 marker |
No specifications match. Try a parameter name or a unit.
The package selector updates all four views together.
No matching rowsTry a pin name, parameter, unit or test condition, or reset the filters.
Sensor signal conditioning
Apply a small analog sensor output to a non-inverting stage. Choose gain for the signal range, ADC reference and available output swing.
Manufacturer application guideVoltage buffer
Use a follower when the voltage should remain similar but the following circuit needs a lower source impedance. Check input and output limits.
Manufacturer application guideActive low-pass filter
Combine resistance, capacitance and feedback to filter a slow signal. Evaluate bandwidth, loading and settling in the complete circuit.
Manufacturer application guideTake it into ProTech
Find LM358 in the Components Library to place its schematic symbol and connect its pins.
Simulation model available · Open the adjustable amplifierOpen ProTech