LM358AD - Dual Low Power Op-Amp, 1.1MHz, SOIC-8 | STMicroelectronics
MPN: LM358AD ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.46 | $0.46 |
| 10 | $0.39 | $3.90 |
| 100 | $0.28 | $28.00 |
| 500 | $0.22 | $110.00 |
| 1,000 | $0.18 | $180.00 |
| 2,500 | $0.15 | $375.00 |
LM358AD Overview
An operational amplifier (op-amp) is a high-gain, DC-coupled electronic voltage amplifier with differential inputs and a single-ended output. Within the broader power management and signal conditioning hierarchy, the LM358AD belongs to the general-purpose op-amp category, sitting between precision instrumentation amplifiers (high accuracy, low noise) and high-speed amplifiers (wide bandwidth, fast slew). Op-amps form the building blocks of analog signal chains: filters, comparators, integrators, transducers, sensor signal conditioners, and active rectifiers. The LM358 family specifically targets single-supply 5V/12V/24V systems that cannot tolerate the negative rail required by legacy op-amps like the LM741.
Key features include: 1.1 MHz gain-bandwidth product, 0.6 V/µs slew rate, input common-mode range that includes ground (enabling true single-supply sensing near 0V), low input bias current, internal frequency compensation (no external capacitor required), and ESD protection on the inputs. The output stage can swing to within a few hundred millivolts of the negative rail, although it does not reach the positive rail — meaning the part is not rail-to-rail but is sufficient for most single-supply transducer interfaces.
Technically, the LM358AD uses a bipolar junction transistor (BJT) input stage rather than JFET or CMOS, which trades higher input bias current (~45 nA typical) for extremely low input offset voltage drift and predictable behavior across temperature. The two amplifiers share only the power pins; their inputs and outputs are fully independent, allowing asymmetric configurations such as one channel as a comparator and the other as a gain stage.
Typical applications include battery-powered sensor signal conditioning, transducer amplifiers, DC gain blocks, active filters, integrators, comparators with hysteresis, and 4–20 mA current loop transmitters. Industrial designs frequently use the LM358AD in 24V PLC analog input modules, while consumer designs use it for white-goods sensor interfaces and IoT battery nodes.
When designing with this device, remember that the output cannot swing to the positive rail — typically VOH stops around VCC−1.5V at 10 mA load. Place a 100 nF bypass capacitor close to VCC and ground, and use a feedback resistor of at least 10 kΩ to limit output stage loading.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for LM358AD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM358AD (same form factor and footprint) — differing in Package, Slew Rate, Amplifier Type, Input Offset Voltage, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LM358ADR
✅ Drop-In📋 Reference alternative (not in catalog)
LM358DT
✅ Drop-In✓ In Stock
$0.0509 / Unit
View Datasheet →LM2904DR
✅ Drop-In✓ In Stock
$0.1 / Unit
View Datasheet →LM358DR
✅ Drop-In✓ In Stock
$0.0514 / Unit
View Datasheet →LM2904DR
✅ Drop-In✓ In Stock
$0.1 / Unit
View Datasheet →SGM358
✅ Drop-In📋 Reference alternative (not in catalog)
TPD358
✅ Drop-In📋 Reference alternative (not in catalog)
LM358AD Maximum Ratings & Electrical Characteristics
| Amplifier Type | General Purpose, Low Power |
| Number of Channels | 2 (Dual) |
| Gain-Bandwidth Product (GBP) | 1.1 MHz |
| Slew Rate | 0.6 V/µs |
| Supply Voltage Range (Single) | 3 V to 30 V |
| Supply Voltage Range (Dual) | ±1.5 V to ±16 V |
| Input Bias Current | 45 nA (typical) |
| Quiescent Current (per amplifier) | 0.7 mA (typical) |
| Input Common-Mode Range | 0 V to VCC−1.5 V |
| Operating Temperature Range | 0 °C to +70 °C |
| Package | 8-pin SOIC |
| Mounting Type | Surface Mount |
| ESD Protection | Yes (HBM, on inputs) |
| Internal Frequency Compensation | Yes |
| RoHS Status | Compliant |
LM358AD Pin Configuration
| Pin 1 | OUTPUT A — Channel A (op-amp 1) output |
| Pin 2 | INVERTING INPUT A — Channel A inverting input (−) |
| Pin 3 | NON-INVERTING INPUT A — Channel A non-inverting input (+) |
| Pin 4 | VCC- / GND — Negative supply (or Ground for single-supply operation) |
| Pin 5 | NON-INVERTING INPUT B — Channel B non-inverting input (+) |
| Pin 6 | INVERTING INPUT B — Channel B inverting input (−) |
| Pin 7 | OUTPUT B — Channel B (op-amp 2) output |
| Pin 8 | VCC+ — Positive supply voltage (3 V to 30 V) |
Typical Applications
LM358AD is suitable for 7 applications: Industrial 24V Sensor Signal Conditioning, Battery-Powered IoT Sensor Node Front-End, Active Audio Filter / Tone Control, Comparator with Hysteresis (Schmitt Trigger), DC Motor Current Sensing Amplifier, 4-20 mA Current Loop Transmitter, White-Goods and Appliance Control Boards.
Industrial 24V Sensor Signal Conditioning
The LM358AD fits 24V industrial sensor signal conditioning because of its 3V–30V single-supply range and 1.1 MHz gain-bandwidth product, which comfortably handles DC and low-frequency transducer signals from thermocouples, strain gauges, and 4–20 mA loop interfaces. Place the LM358AD between the sensor and a 12-bit ADC running from 5V, using a non-inverting gain of 10 (1 MΩ/110 kΩ resistor pair) to amplify mV-level signals to the ADC's full-scale input. The bipolar input stage provides low input offset drift across the 0–70 °C commercial range, and the 45 nA typical input bias current does not load high-impedance sensors. Unlike a precision instrumentation amp like the INA128, the LM358AD costs $0.18 in volume and runs from the same 24V rail that powers the PLC backplane.
Recommended
Battery-Powered IoT Sensor Node Front-End
The LM358AD suits battery-powered IoT sensor front-ends because its 3V minimum supply enables direct operation from a single 3.3V Li-Ion or 3V coin cell, while the 0.7 mA quiescent current per channel keeps sleep-mode drain low. Connect the op-amp in a non-inverting configuration with unity gain to buffer a resistive divider or thermistor, then feed the output to an ADC inside an MCU. The input common-mode range that includes ground allows sensing down to 0V without a negative rail — essential when the supply is only 3.0 V. For ultra-low-power nodes, however, an MCP6002 or TLV9062 (CMOS input) draws 10× less quiescent current; choose LM358AD only when BOM cost is the dominant constraint.
Recommended
Active Audio Filter / Tone Control
The LM358AD works well in active audio filter and tone-control circuits for consumer audio where the 1.1 MHz gain-bandwidth product covers the 20 Hz–20 kHz audio band with comfortable margin for Sallen-Key low-pass filters up to ~50 kHz cutoff. Use the two independent channels to build a stereo bass/treble tone control, with 100 kΩ potentiometers and 10 nF film capacitors. The 0.6 V/µs slew rate is sufficient for full-scale 20 kHz sine waves (~125 mV/µs) with no slew-induced distortion. Note that the LM358AD is not a low-noise audio op-amp — its input voltage noise density is ~40 nV/√Hz — so for high-fidelity paths use the NE5532 instead. The LM358AD excels in budget speaker crossover networks and guitar pedal clones.
Recommended
Comparator with Hysteresis (Schmitt Trigger)
The LM358AD is frequently used as a comparator with hysteresis, leveraging its push-pull output stage and input range that includes ground. Wire one op-amp as an inverting Schmitt trigger with 100 kΩ feedback and 10 kΩ input resistors to set the threshold at VCC × 10/(100+10) ≈ 0.45 V when VCC = 5 V. The hysteresis width prevents chatter on slow or noisy inputs, making this configuration common in over-voltage/under-voltage protection circuits and zero-crossing detectors. The trade-off is propagation delay of ~1–2 µs, which limits switching frequency to ~50 kHz. For faster switching or tighter thresholds, a dedicated comparator like the LM393 (open-collector) is preferred, but the LM358AD suffices for power-good signals and slow alarm inputs.
Recommended
DC Motor Current Sensing Amplifier
The LM358AD fits DC motor current sensing applications because it operates from the same 12V or 24V supply that drives the motor, eliminating the need for a separate low-voltage analog rail. Use the LM358AD in a difference amplifier configuration (4-resistor network) across a low-side shunt resistor (typically 0.1 Ω, 1 W) to convert the shunt voltage into a ground-referenced 0–5 V signal for an MCU ADC. The 1.1 MHz GBP handles PWM chopping artifacts at 25 kHz with plenty of bandwidth to recover the average current. Two channels enable simultaneous monitoring of two motors (left/right drive on a robot). For accurate current measurement, the LM358AD's input offset voltage (~2 mV typical, ~7 mV max) limits low-current resolution; a precision op-amp like the INA180 is preferred for sub-100 mA sensing.
Recommended
4-20 mA Current Loop Transmitter
The LM358AD is well-suited as the op-amp core of a 4–20 mA current loop transmitter, where it regulates the loop current by driving a pass transistor in series with the loop. Connect one channel as a voltage-to-current converter: the input voltage (from a DAC or potentiometer) is converted to a current through a sense resistor and the LM358AD adjusts the pass transistor's base/gate to maintain the loop current. The 3V–30V supply range directly supports loop compliance voltages up to 30V, and the 0.7 mA quiescent current adds negligible error to the 4 mA loop zero. The bipolar input stage handles industrial EMI better than CMOS-input alternatives. Use the second channel for loop read-back or diagnostics. This topology is found in PLC analog output modules, HVAC actuators, and process-control transmitters.
Recommended
White-Goods and Appliance Control Boards
The LM358AD is the industry-standard op-amp for white-goods and appliance control boards (washing machines, dishwashers, refrigerators) because of its extremely low cost (~$0.18 in volume), single-supply operation from a 5V or 12V MCU rail, and proven reliability across decades of field deployment. The two-channel configuration handles both a sensor amplifier (temperature, water level, motor current) and a comparator (threshold detection) on the same chip, reducing BOM cost and PCB area. The 0–70 °C operating range covers indoor appliance environments. STMicroelectronics specifically targets this application with the LM358 family, and major appliance OEMs (Whirlpool, LG, Samsung) qualify the part in their reference designs. Its rugged ESD protection on the inputs withstands the motor back-EMF noise common in these environments.
Recommended
Recommended Products Summary
Engineering reference data for LM358AD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM358ADR | LM358D | LM2904D | LM358DR | LM2904DR | SGM358 | TPD358 |
|---|---|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments | Texas Instruments | SGMC | 3PEAK |
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Gain-Bandwidth Product | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1 MHz | 1.1 MHz |
| Slew Rate | 0.6 V/µs | 0.6 V/µs | 0.6 V/µs | 0.6 V/µs | 0.6 V/µs | 0.6 V/µs | 0.5 V/µs | 0.6 V/µs |
| Supply Voltage Range (Single) | 3 V to 30 V | 3 V to 30 V | 3 V to 30 V | 3 V to 30 V | 3 V to 30 V | 3 V to 30 V | 3 V to 30 V | 3 V to 30 V |
| Operating Temperature Range | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | −40 °C to +125 °C | 0 °C to +70 °C | −40 °C to +125 °C | −40 °C to +85 °C | −40 °C to +85 °C |
| Number of Channels | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) |
| Quiescent Current (per channel) | 0.7 mA | 0.7 mA | 0.7 mA | 0.7 mA | 0.7 mA | 0.7 mA | 0.7 mA | 0.5 mA |
| Unit Price (qty-1, USD) | $0.46 | $0.46 | $0.42 | $0.48 | $0.45 | $0.47 | $0.20 | $0.22 |
Key Differentiators
- Industry-standard general-purpose dual op-amp with 40+ year field-proven reliability (vs TPD358 (3PEAK))
- Single-supply 3V operation enables direct connection to coin-cell or Li-Ion battery rails (vs LM741)
- Cost leadership in SOIC-8 general-purpose op-amp category (vs LM358DR (Texas Instruments))
- Wide commercial temperature range covers 0–70 °C indoor applications (vs LM2904D)
Design Notes
Place a 100 nF ceramic bypass capacitor as close as possible to the VCC+ pin (pin 8) and ground (pin 4). For designs exposed to motor or relay switching noise, add a 10 µF electrolytic or tantalum in parallel. The LM358AD draws up to ~1.5 mA quiescent current at 30 V supply, so power dissipation in the SOIC-8 package (thermal resistance ~150 °C/W) at 30 V is ~45 mW — well within the 540 mW absolute maximum.
The output cannot swing to the positive rail — at 10 mA source load, VOH typically stops at VCC−1.5 V. If your signal swings close to VCC (e.g., a 5 V ADC with full-scale 5 V input), the LM358AD will clip and you must use a rail-to-rail op-amp such as the TLV9062 or MCP6002 instead. Do not load the output with less than 2 kΩ — the LM358AD's output stage is bipolar and cannot drive heavy loads below 600 Ω without distortion.
Route the inverting and non-inverting input traces as differential pairs if possible, and keep them away from switching nodes (MOSFET drains, relay coils, PWM signals). Use a ground plane on layer 2 to provide low-impedance return paths. For SOIC-8, the thermal pad is not present — heat is dissipated through the 8 lead frames; spread thermal copper at each pad to share heat. The exposed pad variant is not offered for this part.
The input bias current (~45 nA typical, up to 150 nA) creates offset voltage across high-value feedback resistors — at 1 MΩ feedback, bias current can introduce ~45 µV offset, and across temperature it drifts. Keep feedback resistors below 100 kΩ in precision DC applications, or use a CMOS-input op-amp (e.g., TLV9062) if high-impedance feedback is required. The LM358AD's input voltage noise density (~40 nV/√Hz) is acceptable for sensor conditioning but limits SNR in audio preamp applications.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified — choose LM2904-Q1 for automotive applications. Lead-free SOIC-8 package. Halogen-free status not explicitly stated in provided data; treated as 'unknown'.