LM358G-S08-R - UTC Dual Op-Amp, 3–32V, 1MHz GBW (SOP-8)

What Are the Technical Specifications of LM358G-S08-R?

Key numbers that matter. The 0.5V/µs slew rate is the limiting spec. At 1MHz GBW and unity gain, the LM358G handles audio-band signals and DC control loops easily. But at 20kHz full-swing, you need ~1.3V/µs for a 10V_pp output. The LM358G rounds off sine waves above ~8kHz at full swing.

The 0.8mA quiescent current at 5V is modest - not ultra-low-power territory, but manageable for line-powered or large-battery designs. For battery-powered always-on circuits, consider the LMV358 (210µA typ) or a CMOS op-amp.

When Should You Use (and NOT Use) the LM358G-S08-R?

✅ Use LM358G-S08-R when:

• Cost-sensitive production in volume. The UTC LM358G delivers TI-equivalent electrical performance at a lower unit price. For consumer electronics, appliances, and industrial control where the BOM has already been squeezed, it's the obvious second-source.
• DC and low-frequency signal conditioning (sensors, transducers). The 1MHz GBW is more than enough for thermocouple amplifiers, current sensing, and 4–20mA loop receivers. The input common-mode range includes ground - no negative rail needed for single-supply designs.
• Unity-gain buffer for slow-moving signals. Internally compensated for unity gain stability. Common as a voltage follower between a high-impedance sensor and an ADC input.
• Single-supply designs from 5V to 24V. The LM358G works from 3V to 32V single supply - covers 5V USB-powered, 12V automotive, and 24V industrial rails without a separate op-amp rail.
• Drop-in replacement for TI LM358DR in SOP-8. Same pinout, same package, same specs. Validate one batch, then use interchangeably.

❌ Don't use LM358G-S08-R when:

• Rail-to-rail output needed (low-voltage single supply). The LM358G output can only swing to about V_CC−2V on the high side and ~1V above ground on the low side. At 3.3V supply, usable output range is only ~1V to 1.3V. Use LMV358 (rail-to-rail output) instead.
• Audio above line level. At 0.5V/µs, a 2V_rms audio signal starts distorting around 10kHz. For audio preamps and active filters, use a faster op-amp like the NE5532 (9V/µs).
• Precision DC measurement (<1mV offset). 5mV max V_OS is fine for general use but not for microvolt-level thermocouple or strain gauge signals. Use a precision op-amp like the OPA2333 (10µV max V_OS, zero-drift).
• Input signals near the positive rail. The input common-mode range stops at V_CC−1.5V. If your signal sits near the positive supply, the output goes undefined. AC-couple and re-bias, or use a rail-to-rail input op-amp.

LM358G vs TI LM358DR: Second-Source Comparison

The electrical differences are small. The sourcing difference is not: UTC LM358G typically comes in lower on unit price for production volumes. For most general-purpose designs, the two are interchangeable. Validate one lot, then buy whichever is available at the right price.

LM358G Output Swing: Why Rail-to-Rail Matters at Low Voltage

What Are the Alternatives to LM358G-S08-R?

LM358G vs LM358DR - which one? Electrically, they're interchangeable. The real decision is sourcing strategy. If your design is validated on TI LM358DRs, the UTC LM358G is a cost-reduction second-source. Validate across temperature - if it passes, you've cut your op-amp BOM cost without a PCB change.

What Are the Typical Applications of LM358G-S08-R?

Current sensing in power supplies. One channel configured as a differential amplifier across a shunt resistor. The input common-mode range includes ground, so low-side current sensing works directly - no negative rail. The 0.8mA draw is trivial compared to the supply's output.

Sensor signal conditioning (thermocouple, pressure, pH). The second channel provides gain or filtering after the first channel buffers the sensor. The LM358G's 1MHz GBW gives usable gain up to ~100× at 10kHz - enough for most industrial sensors.

4–20mA current loop receiver. A precision resistor converts the loop current to voltage. The LM358G buffers this voltage and drives an ADC input. The wide 3–32V supply range means it can run from the loop's own 24V rail without a separate regulator.

Voltage follower / buffer between stages. The LM358G at unity gain is stable with no external compensation. Common as an impedance buffer between a high-output-impedance sensor stage and a low-input-impedance ADC or filter stage.

Why Buy LM358G-S08-R from ICMASS?

Traceable UTC supply chain. We source LM358G-S08-R directly from UTC-authorized channels. Every reel comes with manufacturer traceability. For production buyers, that means your quality auditor checks the box without asking extra questions.

Cross-reference and BOM consolidation. Ordering LM358Gs alongside comparators, references, ADCs, and passives for the same build? We consolidate into one shipment - fewer customs forms, lower freight per part.

Batch validation support. Need to qualify a new second-source op-amp for production? We'll send samples from the same lot as your production order, so your validation data matches the parts you actually receive.

Shenzhen warehouse, global shipping. Same-day dispatch for orders placed before 15:00 CST. Contact us for a same-day quote on your reel quantities.

Frequently Asked Questions

Q1: Is the LM358G-S08-R a drop-in replacement for TI LM358DR?

A: Yes - same SOP-8 pinout, same 3–32V supply range, same 1MHz GBW and 0.5V/µs slew rate. The UTC LM358G is designed as a direct second-source. Validate one production lot to confirm electrical performance in your circuit, then use interchangeably.

Q2: Why can't the LM358G output reach the supply rails?

A: It's a bipolar design with a Darlington output stage - not rail-to-rail. The output can typically swing to within ~2V of the positive rail and ~1V of ground (at light loads). At 5V supply, you get about 2V of usable output swing. At 3.3V, it drops to ~1V. For near-rail output, use a rail-to-rail op-amp like the LMV358.

Q3: Can I use the LM358G as a comparator?

A: Yes, but it's not ideal. The LM358G will work as a comparator in a pinch, but the open-loop recovery from saturation is slow (tens of microseconds). The output swing doesn't match logic levels cleanly. A dedicated comparator like the LM393DR gives faster, cleaner switching with an open-collector output designed for logic interfaces.

Q4: What happens if my input signal goes below ground?

A: Phase reversal - the output can flip to the wrong rail. The LM358G's input common-mode range extends to ground but not below it. More than ~0.3V below ground on either input can cause the output to latch to the positive rail. AC-couple and re-bias to mid-supply, or clamp the input with a Schottky diode to ground.

Q5: What's the difference between LM358G-S08-R and LM358L-S08-R?

A: The "G" suffix = halogen-free/green plating. The LM358L is the standard version. Electrical specs are identical. The G variant is for RoHS compliance in markets that require halogen-free packaging. For most procurement, the G version is the current standard.

Q6: How does the LM358G compare to the LMV358 for low-voltage designs?

A: LMV358 is the better choice below 5V. The LMV358 is rail-to-rail on both input and output, draws 210µA (vs 0.8mA), and works from 2.7V. The LM358G needs at least 3V and gives you only ~1V of usable swing at 3.3V. Use the LM358G for 5V+ designs; switch to LMV358 for 3.3V or battery-powered circuits.

Q7: Why does my LM358G circuit work at 5V but fail at 3.3V?

A: Input common-mode range collapse. At 3.3V supply, the usable input range is roughly 0V to 1.8V (Vcc−1.5V). If your signal exceeds 1.8V, the output becomes unpredictable. The fix: either raise the supply voltage, or switch to a rail-to-rail input op-amp like the LMV358.

Q8: What should I do with the unused op-amp channel?

A: For the bipolar LM358G, leaving all three pins floating is acceptable for prototyping. The internal bias currents (tens of nA) naturally pull the inputs to a defined state. For production, TI recommends connecting the unused channel as a voltage follower with the non-inverting input tied to a mid-supply reference. Do not leave inputs floating on CMOS op-amps - but the LM358G is bipolar, so this is less critical.

Related Products

• LM358DR - TI Dual Op-Amp, same specs, SOIC-8
• LMV358IDR - Low-Voltage Rail-to-Rail Op-Amp, 2.7–5.5V
• LM393DR - Dual Comparator, open-collector output
• LMV393IDR - Low-Voltage Dual Comparator, 2.7–5.5V
• Comparator vs Op-Amp - When to Use Which