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STMicroelectronics LM358QT
- Part No.:
- LM358QT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
LM358QT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:75,823
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Product details
Overview
LM358QT from STMicroelectronics is a low-power dual operational amplifier designed for single-supply operation (3–30 V), featuring 1.1 MHz unity-gain bandwidth, 100 dB large-signal voltage gain, and rail-to-rail output swing down to 0 V. It delivers 2 mV input offset voltage, 20 nA input bias current, and operates across 0 °C to 70 °C - ideal for sensor signal conditioning in industrial control and consumer electronics.
For engineers reviewing the LM358QT datasheet, LM358QT pinout, LM358QT application, or LM358QT equivalent, key selection criteria include its single-supply compatibility, ground-sensing input stage, 40 mA output sink/source capability, and DFN8 2×2 mm package suitability for space-constrained PCB layouts.
Technical Context
The LM358QT integrates two independent, internally frequency-compensated op amps with PNP input stages enabling input common-mode voltage range extending to the negative rail (GND). Its differential input voltage range equals the full supply voltage (±32 V), supporting robust operation under mismatched input conditions.
Designed for linear amplification in single-rail systems, it maintains stable DC gain (100 dB) and 0.6 V/µs slew rate while drawing only 0.7–1.2 mA total supply current at 5 V - making it suitable for battery-powered instrumentation and transducer interfaces where quiescent power must be minimized without sacrificing precision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct interface with 5 V logic rails and higher-voltage industrial sensors without level-shifting. |
| Unity-Gain Bandwidth | 1.1 MHz - supports audio-frequency amplification and medium-speed signal conditioning up to ~100 kHz closed-loop. |
| Input Offset Voltage | 2 mV (max at 25 °C) - ensures ≤20 mV error in 10× gain DC amplifiers, sufficient for basic sensor front-ends. |
| Input Bias Current | 20 nA (typ) - minimizes voltage drop across high-impedance sources (e.g., thermistors, photodiodes). |
| Output Swing | 0 V to (VCC − 1.5 V) - allows true ground-referenced output in single-supply configurations. |
| Common-Mode Input Range | Includes GND (VCC−) - enables direct connection of unipolar sensor outputs without external biasing. |
| Large-Signal Voltage Gain | 100 dB - provides ≥100,000× open-loop gain for precise closed-loop gain setting with standard resistors. |
Pinout & Package
LM358QT is housed in a DFN8 2×2 mm package with wettable flanks, optimized for automated optical inspection (AOI) and high-density PCB assembly. The exposed thermal pad (Pin 8) must be soldered to a PCB thermal plane for optimal thermal performance (RthJA = 57 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amplifier A) | Accepts feedback network input; referenced to internal PNP differential pair. |
| 2 | Non-inverting input (Amplifier A) | Direct sensor or reference connection point; supports rail-to-rail common-mode range. |
| 3 | Output (Amplifier A) | Capable of sourcing 40 mA / sinking 20 mA; swings to within 1.5 V of VCC. |
| 4 | VCC− (GND) | Power return for both amplifiers; serves as reference for input and output voltage ranges. |
| 5 | Non-inverting input (Amplifier B) | Independent channel input; electrically identical to Pin 2. |
| 6 | Inverting input (Amplifier B) | Independent channel input; electrically identical to Pin 1. |
| 7 | Output (Amplifier B) | Independent output; shares same drive strength and swing limits as Pin 3. |
| 8 | Exposed thermal pad | Must be connected to PCB ground plane for thermal dissipation; not electrically functional. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation capacitors - simplifies layout and reduces BOM count. |
| Rail-to-rail input (down to GND) | Enables direct interfacing with 0 V–reference sensors (e.g., bridge transducers, RTDs) without bias networks. |
| Low input bias current (20 nA) | Reduces error in high-Z source applications such as pH electrodes or piezoelectric sensors. |
| Single-supply operation (3–30 V) | Supports direct integration into 5 V microcontroller systems and 24 V industrial PLC I/O modules. |
| Thermally enhanced DFN8 | 57 °C/W junction-to-ambient thermal resistance enables >150 mW continuous dissipation at room ambient. |
Applications
| Temperature Sensor Interface | DC Motor Current Sensing |
|---|---|
Use Scenario: Amplifying low-level output from NTC thermistors or RTDs in HVAC controllers. IC Role / Device Role / Timing Role: Dual-channel DC-coupled non-inverting amplifier with matched gain paths for ratiometric measurement. Use Value: Input common-mode range including GND eliminates need for bias resistors; 2 mV offset ensures <±0.5 °C error in 10 kΩ/10 kΩ bridge configurations. | Use Scenario: Shunt-based current monitoring in 12 V brushed DC motor drives. IC Role / Device Role / Timing Role: High-side or low-side current-to-voltage converter with gain set by precision resistors. Use Value: 40 mA output drive supports direct interface with ADC reference inputs; 1.1 MHz bandwidth captures PWM ripple up to 100 kHz. |
| Industrial Analog Input Module | Consumer Audio Line Driver |
Use Scenario: Signal conditioning for 4–20 mA loop receivers in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Dual op amp configured as precision I/V converter and buffer stage. Use Value: 100 dB open-loop gain ensures <0.01% gain error with 1% resistors; SO8-compatible footprint allows drop-in replacement in legacy designs. | Use Scenario: Single-supply headphone driver or line-out buffer in portable media players. IC Role / Device Role / Timing Role: Unity-gain voltage follower with DC-coupled input for zero-crossing distortion reduction. Use Value: Rail-to-rail output swing delivers full 0–3.3 V dynamic range from 3.3 V supply; THD <0.02% preserves audio fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM358DT | SO8 package, same electrical specs, wider operating temperature (0–70 °C), higher RthJA (125 °C/W) | Better suited for through-hole prototyping or legacy board upgrades requiring SO8 footprint | Select when thermal budget allows larger package or when manual rework is required. |
| LM2904DT | Automotive-grade (−40 to 105 °C), same pinout, qualified per AEC-Q100, slightly higher input offset (3 mV max) | Required for automotive body electronics or industrial equipment needing extended temperature reliability | Choose for mission-critical systems demanding automotive qualification and longer lifetime validation. |
Compared with LM358DT and LM2904DT, the LM358QT offers superior thermal performance in ultra-compact layouts but requires reflow-soldered DFN assembly; LM2904DT adds automotive qualification at minor DC precision cost, while LM358DT prioritizes mechanical flexibility over density.
Availability
LM358QT is available at Aetrix Electronics and suitable for industrial sensor interfaces, consumer audio signal chains, and programmable logic controller (PLC) analog input modules requiring stable component supply across production lifecycles.
Supply support for LM358QT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering innovative solutions across automotive, industrial, and consumer markets since 1987.
The LM358QT belongs to ST's legacy precision analog portfolio, engineered specifically for cost-sensitive, high-volume applications requiring reliable single-supply op amp functionality with proven long-term manufacturability.
FAQ
What is the maximum allowable supply voltage for LM358QT?
The absolute maximum supply voltage is 32 V (±16 V dual supply equivalent), but recommended operating range is 3 V to 30 V DC. Exceeding 30 V risks exceeding safe power dissipation limits in the DFN8 package, especially above 70 °C ambient. Electrical characteristics are fully specified from 5 V to 30 V.
Does LM358QT support rail-to-rail output swing?
LM358QT provides output swing from 0 V (GND) up to (VCC − 1.5 V) - i.e., it reaches the negative rail but not the positive rail. This "single-supply rail-to-rail output" behavior is confirmed in Table 2 (Operating Conditions) and Figure 11 (Input Voltage Range) of the datasheet, enabling ground-referenced signal processing.
Can LM358QT be used as a comparator?
While not optimized for comparator use, LM358QT can function as a slow comparator in non-critical applications due to its open-loop configuration and wide input voltage range. However, lack of internal hysteresis, limited slew rate (0.6 V/µs), and undefined propagation delay make dedicated comparators (e.g., TS882) preferable for timing-sensitive switching.
Is the exposed pad on LM358QT electrically connected?
No - the exposed thermal pad (Pin 8) is not electrically connected to any internal node. Per Section 2 (Package Pin Connections) and Figure 31 (DFN8 Recommended Footprint), it may be left floating or soldered to PCB ground solely for thermal conduction. No electrical continuity exists between the pad and GND or other pins.
LM358QT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1.1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 700µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LM358QT FAQ
1.How can I place an order for LM358QT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM358QT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM358QT reliable?
The price and inventory of LM358QT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM358QT is usually 5 days.
3.What payment methods are accepted for LM358QT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM358QT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM358QT?
LM358QT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM358QT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM358QT?
For technical support, including LM358QT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM358QT requirements.
6.How does Aetrix verify that LM358QT is sourced from the original manufacturer or authorized distributors?
All LM358QT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM358QT meets industry standards.
7.What is the process for return or replacement of LM358QT?
All LM358QT units undergo pre-shipment inspection (PSI). If there is an issue with LM358QT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM358QT part is unused and in its original packaging.
Return procedure for LM358QT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM358QT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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