LM358ST - Dual General-Purpose Op Amp | STMicroelectronics
N.º de pieza: LM358ST ✓ ActivoLM358ST Descripción general
An operational amplifier is an analog signal-conditioning IC that uses differential feedback to amplify the voltage difference between its inverting and non-inverting inputs. The LM358 belongs to the general-purpose operational-amplifier family, which sits within the broader amplifier IC and semiconductor hierarchy. Its two independent channels allow one package to provide separate amplification paths for sensors, control loops, audio stages, or general analog signal processing.
The principal features of the LM358ST include two independent amplifier circuits, internally integrated frequency compensation, a common-mode input range that includes ground, and low-power operation from a single supply. The 800 kHz bandwidth supports general-purpose closed-loop signal paths without requiring an external compensation network. Its 8-pin TSSOP format provides a compact surface-mount option for mixed-signal boards with limited routing area.
Each channel uses a differential input stage and an internally compensated voltage-feedback architecture. Because the channels are independent, one can amplify a sensor signal while the other performs filtering, comparison, level conversion, or feedback control. Common-mode operation near ground is particularly useful for circuits powered from a single positive rail, where input signals may remain close to 0 V. Designers should still verify input and output swing against the specific supply voltage used in the final circuit.
Typical uses include low-side current sensing, sensor amplification, audio and communications interfaces, industrial control, and embedded instrumentation. In an STM32-based measurement system, the two channels can condition separate analog inputs before conversion by the microcontroller. The device can also implement active filters or comparators because its outputs can typically swing close to ground when operated from a positive single supply.
For PCB design, place input resistors, feedback components, and bypass capacitors close to the relevant pins to reduce parasitic feedback and noise pickup. A local supply decoupling capacitor should be positioned near pin 8, with the ground return routed directly to pin 4. Check input common-mode voltage, output swing, stability with the intended feedback network, and channel thermal dissipation before committing the layout.
This product page combines the exact LM358ST package and electrical identity with sourcing guidance, genuine drop-in options, pin assignments, and practical application notes. It is intended to help engineers compare footprint, function, supply range, bandwidth, and design constraints faster than a raw distributor listing while preserving manufacturer datasheet requirements for final qualification.
Alternativas directas para LM358ST — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LM358ST (mismo factor de forma y huella) — difiere en Amplifier Type, Mounting Type, Package.
LM2904ST
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Ver hoja de datos →LM358ST
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Ver hoja de datos →LM358ST Valores máximos y características eléctricas
| Amplifier Type | General Purpose |
| Number of Circuits | 2 circuits |
| Channel Count | 2 channels |
| Architecture | Two independent, internally frequency-compensated amplifiers |
| Gain-Bandwidth Product | 800 kHz |
| Supply Voltage Range, Single Supply | 3 V to 32 V |
| Maximum Supply Voltage | ±16 V |
| Total Maximum Supply Span | 32 V |
| Single-Supply Operation | Supported |
| Frequency Compensation | Internal |
| Encapsulado | 8-TSSOP, 0.118 in (3.00 mm) width |
| Tipo de montaje | Surface Mount |
| Shipping Package | Tape and Reel |
| Estado RoHS | Unknown |
| REACH Status | Unknown |
Configuración de pines de LM358ST
| Pin 1 | OUT1 — Amplifier 1 output |
| Pin 2 | IN1- — Amplifier 1 inverting input |
| Pin 3 | IN1+ — Amplifier 1 non-inverting input |
| Pin 4 | V- — Negative supply or ground connection |
| Pin 5 | IN2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN2- — Amplifier 2 inverting input |
| Pin 7 | OUT2 — Amplifier 2 output |
| Pin 8 | V+ — Positive supply input |
Aplicaciones típicas
LM358ST es adecuado para 6 aplicacións: STM32 Sensor Signal Conditioning, Low-Side Current Sensing, Industrial Control and Feedback Loops, Audio Preamplifier Stage, Active Filtering and Signal Conditioning, Portable and Battery-Powered Instrumentation.
STM32 Sensor Signal Conditioning
The LM358ST fits low-frequency sensor conditioning ahead of an STM32 ADC because it provides two independent, internally compensated channels with an 800 kHz gain-bandwidth product. Each channel can amplify a sensor signal, apply gain, and provide offset or filtering before conversion. Powered from the same positive rail as the controller, it is particularly practical when the sensor signal is near ground. According to the manufacturer datasheet, operation from a single supply is supported from 3 V to 32 V. The design must still keep inputs within the common-mode range and ensure the amplified output remains within the LM358ST output-swing limits and the STM32 ADC input range.
Recomendado
Low-Side Current Sensing
The LM358ST is suitable for amplifying the small voltage produced by a low-side shunt resistor in a motor, power-supply, or battery-current measurement path. Its two independent channels can monitor positive and negative currents, or supply gain for one sensor while handling a related buffer function. According to the manufacturer description, both channels are internally frequency compensated, while the 800 kHz gain-bandwidth product supports many moderate-bandwidth control and telemetry signals. Correct design depends on preserving the shunt signal within the input common-mode range and accepting the LM358 family offset characteristics where the measurement resolution permits them.
Recomendado
Industrial Control and Feedback Loops
The LM358ST can serve as the error amplifier or output buffer in a low-frequency industrial control loop where compactness and single-supply operation matter. Its two independent amplifier sections allow one channel to amplify an error signal while the other buffers a reference or actuator command. According to the manufacturer datasheet, the amplifiers are internally frequency compensated and intended for general-purpose operation over a wide supply range. Loop stability must be checked with the actual feedback network and load because compensation, output swing, and slew behavior determine the practical response of the control path.
Recomendado
Audio Preamplifier Stage
The LM358ST can provide general-purpose voltage amplification in a low-cost audio preamplifier or line-stage design when its noise, offset, and output-drive characteristics fit the audio quality target. The two channels support independent left and right signal paths, while single-supply operation simplifies portable equipment. According to the manufacturer description, the device provides high gain with internal frequency compensation and an 800 kHz gain-bandwidth product. In an audio board, bypass the supply locally, keep input return paths short, and verify output clipping against the selected rail voltage because low-voltage headroom strongly affects available audio swing.
Recomendado
Active Filtering and Signal Conditioning
The LM358ST can implement first-order active filters or general analog conditioning networks because each channel provides independent high-gain amplification with internal compensation. Common uses include gain, inversion, buffering, and simple active filtering around sensor or communications signals. According to the manufacturer datasheet, the 800 kHz gain-bandwidth product is suitable for many low-frequency signal paths. Component tolerances and op-amp gain error determine the achieved filter response, so simulation should include the selected resistor and capacitor tolerances and the source and load impedances connected to the real board.
Recomendado
Portable and Battery-Powered Instrumentation
The LM358ST is useful in portable instrumentation because it combines two amplifier channels, single-supply operation, and internal frequency compensation in a compact 8-TSSOP package. A battery-derived rail can power the amplifiers and an embedded controller, while separate channels can process a sensor input and a second reference or status signal. According to the manufacturer datasheet, operation is supported from a 3 V single supply. Actual battery-life calculations should include the complete load current, regulator quiescent current, and signal-path activity; the LM358ST current consumption for the exact temperature grade must be taken from the manufacturer electrical table.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM358ST — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM2904ST | LM358ST |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | ROHM Semiconductor |
| Package | 8-TSSOP | 8-TSSOP | 8-TSSOP |
| Number of Circuits | 2 circuits | 2 circuits | 2 circuits |
| Amplifier Type | General Purpose | General Purpose | General Purpose |
| Internal Frequency Compensation | Yes | Yes | Yes |
| Independent Channels | Yes | Yes | Yes |
Diferenciadores clave
- Two independent channels in one compact package (frente a LM2904ST)
- Defined 800 kHz gain-bandwidth characteristic (frente a LM2904ST)
- Direct 3 V to 32 V single-supply capability (frente a LM358ST)
Notas de diseño
Place the input and feedback components close to their associated LM358ST pins, and place the supply bypass capacitor between pins 8 and 4 immediately adjacent to the device. Keep the pin-4 return short and connect it to the circuit ground reference without sharing a narrow path with motor, relay, or switching-current returns. Use the manufacturer 8-TSSOP land pattern and verify paste, mask, and courtyard constraints before releasing artwork.
A 5 V supply does not permit the LM358ST output to swing rail-to-rail. Check the manufacturer output-swing characteristic at the actual load current and confirm that the amplified signal remains inside both the amplifier's output range and the receiving device's input range. Likewise, ensure every input stays within the specified common-mode range; a nominal 5 V supply does not make an input above the positive rail valid.
The two channels are electrically independent, but poor grounding can still couple noise between them. Route high-impedance sensor inputs away from the supply pin, clock traces, switching nodes, and inductor fields. Keep feedback loops physically compact, use a stable reference return for non-inverting inputs, and place additional filtering close to the sensitive amplifier node rather than relying on distant bulk capacitance.
Calculate the power dissipated from the actual supply voltage and load rather than assuming the nominal output current applies to every channel. Estimated: use Pd = (VIN - VOUT) × ILOAD for each active channel, then compare total device dissipation with the thermal limits for the 8-TSSOP package. Use the actual VIN, VOUT, and IL values and consult the manufacturer thermal characterization before selecting copper area or additional cooling.
Información de cumplimiento
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was identified for the exact ordering code. The LM358ST is not presented as an AEC-Q100-qualified automotive device; LM2904ST should be reviewed separately when automotive requirements apply.
