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STMicroelectronics LM258QT
- Part No.:
- LM258QT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
LM258QT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:20,420
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Product details
Overview
LM258QT from STMicroelectronics is a low-power dual operational amplifier designed for single-supply operation from 3 V to 30 V, featuring 1.1 MHz unity-gain bandwidth, 100 dB large-signal voltage gain, 2 mV input offset voltage (typ.), 20 nA input bias current (typ.), and rail-to-rail output swing down to 0 V - widely used in sensor signal conditioning and industrial analog front-ends.
For engineers reviewing the LM258QT datasheet, LM258QT pinout, LM258QT application, or LM258QT equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in ST's official production data (DocID2163 Rev 15).
Technical Context
The LM258QT integrates two independent, internally frequency-compensated op amps optimized for single-supply systems. Its input stage supports common-mode voltage down to the negative rail, and its output swings from 0 V to (VCC – 1.5 V), enabling direct interfacing with microcontrollers and ADCs operating at 3.3 V or 5 V.
It delivers stable performance across –40 °C to +105 °C, with supply current of 0.7–1.2 mA per amplifier at 5 V, 20 nA input bias current (temperature compensated), and 120 dB channel separation at 1–20 kHz - critical for dual-channel signal processing without crosstalk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - supports wide-input industrial and automotive auxiliary rails without external regulation. |
| Unity-Gain Bandwidth | 1.1 MHz - sufficient for DC-coupled sensor amplification and low-frequency active filtering up to ~100 kHz. |
| Large-Signal Voltage Gain | 100 dB - ensures high open-loop precision for accurate closed-loop gain setting in instrumentation circuits. |
| Input Offset Voltage | 2 mV (typ.) - enables sub-1% error in 1 V full-scale transducer amplifiers without trimming. |
| Input Bias Current | 20 nA (typ.) - allows high-impedance source interfacing (e.g., pH electrodes, thermistors) with minimal loading error. |
| Output Voltage Swing | 0 V to (VCC – 1.5 V) - delivers true ground-referenced output for single-supply ADC drivers and comparator interfaces. |
| Channel Separation | 120 dB (1–20 kHz) - prevents inter-channel interference in dual-sensor or stereo audio preamp applications. |
Pinout & Package
LM258QT is housed in an 8-pin DFN 2×2 mm package with wettable flanks and an exposed thermal pad (pin 5), rated for –40 °C to +105 °C operation. The exposed pad may be left floating or connected to GND for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amplifier A) | Accepts differential input signals; referenced to internal PNP input stage with rail-to-rail common-mode range. |
| 2 | Non-inverting input (Amplifier A) | Supports input voltages from V– to (V+ – 2 V); enables ground-referenced sensing in single-supply configurations. |
| 3 | Output (Amplifier A) | Delivers rail-to-rail capable output (0 V to V+ – 1.5 V); drives 2 kΩ loads with ≤20 mV low-level saturation. |
| 4 | V– (GND) | Ground reference for both amplifiers; serves as return path for input bias currents and output sink current. |
| 5 | Exposed thermal pad | Not electrically connected by default; grounding reduces θJA from 57 °C/W to ~45 °C/W for sustained 1.2 mA operation. |
| 6 | Non-inverting input (Amplifier B) | Independent of Channel A; shares same input stage architecture and temperature-compensated bias characteristics. |
| 7 | Inverting input (Amplifier B) | Matches Pin 1 behavior; supports dual-channel differential or parallel gain configurations without interaction. |
| 8 | V+ | Positive supply rail; supplies both amplifiers; current draw remains stable across 3–30 V due to regulated bias design. |
Key Features
| Feature | Design Value |
|---|---|
| Internally frequency-compensated | Guarantees unity-gain stability without external compensation components - reduces BOM count and layout sensitivity. |
| Rail-to-rail input common-mode range | Includes V– (ground), enabling direct connection of 0 V-referenced sensors (e.g., bridge transducers, thermocouples) without level-shifting. |
| Low supply current per channel | 0.7–1.2 mA at 5 V - supports battery-powered IoT nodes and energy-harvesting systems with multi-day runtime. |
| Temperature-compensated input bias | 20 nA (typ.) over –40 °C to +105 °C - maintains consistent gain accuracy in industrial enclosures without recalibration. |
| Differential input voltage range = VCC | Withstands ±32 V differential stress - protects against transient overvoltage during hot-plug or ESD events on sensor lines. |
Applications
| Industrial Sensor Signal Conditioning | Single-Supply Transducer Amplifier |
|---|---|
Use Scenario: Amplifying millivolt-level outputs from load cells and pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Dual-channel DC-coupled gain block with matched offset and drift - one channel for signal, one for reference or diagnostics. Use Value: 2 mV offset and 7–15 µV/°C drift ensure <0.5% total error over –25 °C to +75 °C ambient without trimming. |
Use Scenario: Interfacing 0–5 V analog outputs from legacy industrial controllers to 3.3 V microcontroller ADC inputs. IC Role / Device Role / Timing Role: Level-shifting buffer with rail-to-rail output swing and 0 V minimum - eliminates need for negative supply or charge pumps. Use Value: Output swing to 0 V enables full 10-bit ADC utilization (0–3.3 V) without headroom loss or clipping at low codes. |
| DC-Coupled Instrumentation Front-End | Low-Power Battery-Operated Monitoring |
Use Scenario: High-input-Z differential amplifier for biomedical electrode signals in portable ECG monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier core (with external resistors) providing >100 dB CMRR and low noise (55 nV/√Hz). Use Value: 120 dB channel separation prevents cross-talk between lead I and lead II acquisition paths at 60 Hz. |
Use Scenario: Signal conditioning for environmental sensors (CO₂, humidity) in solar-powered remote weather stations. IC Role / Device Role / Timing Role: Low-quiescent-current dual op amp powering sensor excitation and analog signal scaling in sleep/wake cycles. Use Value: 0.7 mA supply current at 3.3 V extends 2000 mAh Li-ion battery life to >18 months in 1-minute sampling intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904DT | Automotive-qualified (AEC-Q100 Grade 2), wider temp range (–40 °C to +125 °C), identical electrical specs except higher ESD rating (2 kV HBM). | Required for under-hood automotive modules; not necessary for industrial control cabinets or consumer devices. | Select LM2904DT when automotive qualification, extended junction temperature margin, or enhanced ESD robustness are mandatory. |
| TLV2372IDR | Rail-to-rail input/output, lower supply current (550 µA/ch), but reduced GBW (3 MHz), lower VIO (1.5 mV), and narrower VCC range (2.7–16 V). | Suitable for ultra-low-power 3.3 V systems where rail-to-rail I/O is essential, but not for 24 V industrial rails or high-voltage transducers. | Choose TLV2372IDR only if RRO operation and sub-1 mA supply are critical, and 24 V compatibility is not required. |
Compared with LM258QT, LM2904DT adds automotive compliance without sacrificing performance, while TLV2372IDR trades supply voltage range and drive strength for ultra-low power and full rail-to-rail operation - making LM258QT optimal for cost-sensitive, wide-VCC industrial analog front-ends.
Availability
LM258QT is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) analog modules, and battery-powered environmental monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM258QT 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 silicon solutions for smart mobility, power, sensing, and connectivity across industrial, automotive, and consumer markets.
The LM258QT belongs to ST's legacy precision analog portfolio - engineered for reliability in harsh environments and designed to simplify single-supply system design in industrial automation, test equipment, and embedded control.
FAQ
Is LM258QT pin-compatible with LM358DT?
No. LM258QT uses an 8-pin DFN 2×2 mm package with exposed thermal pad (pin 5), while LM358DT uses an SO8 package. Pin numbering differs: DFN pin 1 = SO8 pin 2 (inverting input A), DFN pin 2 = SO8 pin 3 (non-inverting input A), etc. Physical and thermal layouts are incompatible without PCB redesign.
Can LM258QT operate from a 3.3 V supply?
Yes. LM258QT is fully specified from 3 V to 30 V. At 3.3 V, it delivers usable output swing (0 V to ~1.8 V), 1.1 MHz GBW, and 20 nA input bias current. Output drive capability reduces to ~20 mA sink/source, but remains sufficient for driving 10 kΩ ADC inputs or LED indicators.
What is the function of the exposed pad on LM258QT?
The exposed pad (pin 5) is a thermal pad with no internal electrical connection. It may be left floating or soldered to a GND plane to reduce thermal resistance (θJA from 57 °C/W to ~45 °C/W), improving power dissipation margin during continuous 1.2 mA operation at elevated ambient temperatures.
Does LM258QT support AC-coupled applications?
Yes. Its input common-mode range includes ground and its output swings to 0 V, enabling AC-coupled inverting/non-inverting amplifiers using standard coupling capacitors and bias networks. Figure 19 and Figure 21 in ST's DocID2163 Rev 15 provide validated schematics for 5 V single-supply AC gain stages with <0.1% THD.
LM258QT 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:
- 5 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:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LM258QT FAQ
1.How can I place an order for LM258QT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM258QT 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 LM258QT reliable?
The price and inventory of LM258QT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM258QT is usually 5 days.
3.What payment methods are accepted for LM258QT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM258QT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM258QT?
LM258QT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM258QT 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 LM258QT?
For technical support, including LM258QT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM258QT requirements.
6.How does Aetrix verify that LM258QT is sourced from the original manufacturer or authorized distributors?
All LM258QT 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 LM258QT meets industry standards.
7.What is the process for return or replacement of LM258QT?
All LM258QT units undergo pre-shipment inspection (PSI). If there is an issue with LM258QT, 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 LM258QT part is unused and in its original packaging.
Return procedure for LM258QT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM258QT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
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