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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics LM301AD

Name: LM301AD
Brand: STMicroelectronics
SKU: LM301AD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM301AD

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LM301AD.pdf

Description:: IC OPAMP GP 1 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,865

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Product details

Overview

LM301AD from STMicroelectronics is a single general-purpose operational amplifier with internal compensation disabled, requiring external 30 pF capacitor for stability; features ±5 V to ±22 V supply range, 0.25–0.5 V/µs slew rate, 0.5–1 MHz gain-bandwidth product, and 0–+70 °C operating temperature range; used in precision DC-coupled instrumentation amplifiers and active filter stages.

For engineers reviewing the LM301AD datasheet, LM301AD pinout, LM301AD application, or LM301AD equivalent, this page provides verified electrical parameters, SO8 package layout, input offset voltage drift (6–30 µV/°C), output short-circuit current (10–50 mA), and design-meaningful alternatives for legacy op-amp replacement projects.

Technical Context

The LM301AD implements a classic bipolar input stage with NPN differential pair, enabling rail-to-rail input common-mode range up to ±15 V at ±20 V supplies and 80–96 dB CMRR. Its uncompensated architecture allows user-selectable trade-offs between bandwidth (up to 3.5 MHz with 30 pF) and slew rate (10 V/µs in inverting configuration).

It supports single-supply operation via input biasing and includes built-in input/output overload protection without latch-up, making it suitable for industrial sensor signal conditioning where transient immunity and thermal robustness are required across 0–70 °C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Offset Voltage	2–10 mV at +25 °C; impacts DC accuracy in precision integrators and low-gain transimpedance stages
Slew Rate	0.25–0.5 V/µs (typical); limits full-power bandwidth to ~80 kHz at ±10 V swing
Gain-Bandwidth Product	0.5–1 MHz; defines unity-gain stable frequency ceiling with external compensation
Input Bias Current	70–300 nA; requires ≤10 kΩ source impedance to minimize offset error
Supply Voltage Range	±5 V to ±22 V; enables direct interface with legacy ±15 V analog systems
Output Short-Circuit Current	10–50 mA; sustains continuous fault current without damage during sensor wiring faults

Pinout & Package

LM301AD is housed in an 8-pin plastic micropackage (SO8), compliant with JEDEC MS-012, with 1.27 mm pitch, 4.8–5.0 mm body width, and gull-wing leads.

Pin/Terminal	Circuit Role	Design Meaning
1	Balance (Offset Null)	Connects to potentiometer wiper for manual V_OS trimming; essential for <1 mV DC error
2	Inverting Input (−)	Differential input node; high-impedance NPN base; sensitive to PCB leakage currents
3	Non-inverting Input (+)	Differential input node; matched to Pin 2 for CMRR optimization
4	V_CC−	Negative supply rail connection; must be decoupled within 10 mm of pin
5	Balance (Offset Null)	Second null terminal; completes 3-terminal potentiometer connection for offset adjustment
6	Output	Class-A output stage; capable of ±12 V swing into 10 kΩ load at ±15 V supplies
7	V_CC+	Positive supply rail connection; shared decoupling with Pin 4 improves PSRR
8	Compensation	External 30 pF capacitor node; sets dominant pole location for unity-gain stability

Key Features

Feature	Design Value
No internal compensation	Enables user-optimized stability: 30 pF yields 3.5 MHz BW + 10 V/µs SR in inverting mode
Input overload protection	Withstands ±30 V differential input without damage-critical for sensor front-end ESD resilience
No latch-up on CMR exceedance	Operates safely beyond ±15 V common-mode range, preventing system lockup during power sequencing
Free from oscillations	Stable under capacitive loads up to 100 pF without isolation resistor-reduces BOM count

Applications

Industrial Sensor Signal Conditioning

DC-Coupled Instrumentation Amplifier

Use Scenario: Amplifying low-level thermocouple or strain gauge outputs in PLC analog input modules.

IC Role / Device Role / Timing Role: First-stage gain block with adjustable offset nulling and wide supply tolerance.

Use Value: ±22 V supply support interfaces directly with legacy 24 V industrial rails; 6–30 µV/°C drift ensures <100 µV error over 0–70 °C.

Use Scenario: Building three-op-amp instrumentation amps for medical ECG front-ends.

IC Role / Device Role / Timing Role: High-CMRR input buffer with external compensation for 100 dB rejection at 50/60 Hz.

Use Value: 80–96 dB CMRR and no latch-up enable safe operation during electrode contact loss events.

Active Low-Pass Filter (10 kHz)

Legacy Analog Power Supply Monitor

Use Scenario: Second-order Sallen-Key anti-aliasing filter preceding 100 kSPS ADCs in data loggers.

IC Role / Device Role / Timing Role: Unity-gain stable voltage follower with 30 pF compensation set for 10 kHz cutoff.

Use Value: External compensation allows precise Q-factor tuning; 0.5–1 MHz GBP ensures flat response below cutoff.

Use Scenario: Monitoring +5 V and +12 V rails in telecom shelf controllers using resistive dividers.

IC Role / Device Role / Timing Role: Comparator substitute with hysteresis via feedback, leveraging high open-loop gain.

Use Value: 25–100 V/mV large-signal gain enables reliable 50 mV threshold detection despite 2–10 mV V_OS.

Equivalent & Alternatives

The following parts are listed as comparable options for similar general-purpose op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM301AN	DIP8 package; same electrical specs; higher thermal resistance (θ_JA = 100 °C/W vs. 160 °C/W for SO8)	Breadboard prototyping and through-hole PCBs; less suitable for high-density layouts	Select when hand-soldering or legacy board rework is required
TL081CP	JFET input (I_ib = 30 pA); higher GBP (3 MHz); no offset null pins; not pin-compatible	Low-input-current applications (e.g., photodiode amps); no manual V_OS trimming capability	Choose only if input bias current <1 nA is mandatory and offset trimming is unnecessary

Compared with LM301AN and TL081CP, the LM301AD offers SO8 footprint efficiency and user-tunable compensation-critical for space-constrained industrial modules needing field-adjustable DC accuracy and proven ±22 V supply compatibility.

Availability

LM301AD is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, DC-coupled instrumentation amplifiers, active low-pass filters, and legacy analog power supply monitors requiring stable component supply across extended temperature and voltage ranges.

Supply support for LM301AD 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The LM301A series belongs to ST's legacy precision analog portfolio, developed for robust, field-serviceable analog signal chains in industrial control and test equipment where long-term parametric stability and repairability matter.

FAQ

What compensation capacitor value is required for stable unity-gain operation?

A 30 pF ceramic capacitor connected between Pin 1 (Balance) and Pin 8 (Compensation) ensures unity-gain stability with 3.5 MHz bandwidth and 10 V/µs slew rate in inverting configuration. Larger values reduce bandwidth but improve phase margin for capacitive loads above 50 pF.

Can LM301AD operate from a single +12 V supply?

Yes-bias the non-inverting input (Pin 3) to +6 V using a resistor divider, and reference the output to the same midpoint. Input common-mode range extends to within 2 V of either rail, supporting rail-splitter-based single-supply designs with ±6 V effective range.

Why does LM301AD have two balance pins (1 and 5)?

Pins 1 and 5 form a 3-terminal offset null interface: connect a 10 kΩ potentiometer with wiper to Pin 1 and ends to Pins 1 and 5. This configuration balances input transistor mismatches, reducing V_OS to <1 mV-essential for precision integrators and zero-drift sensor interfaces.

How does LM301AD handle input overvoltage beyond ±15 V?

It withstands ±30 V differential input voltage indefinitely due to integrated input clamping diodes and series resistors. This protects downstream circuitry during sensor cable disconnects or ESD events-no external protection components needed for ±25 V transients in industrial environments.

LM301AD Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: -

Slew Rate:: 0.5V/µs

Gain Bandwidth Product:: 1 MHz

-3db Bandwidth:: -

Current - Input Bias:: 70 nA

Voltage - Input Offset:: 2 mV

Current - Supply:: 1.8mA

Current - Output / Channel:: 30 mA

Voltage - Supply Span (Min):: 10 V

Voltage - Supply Span (Max):: 44 V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

LM301AD FAQ

1.How can I place an order for LM301AD through Aetrix?

Please submit a Request for Quotation (RFQ) for LM301AD 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 LM301AD reliable?

The price and inventory of LM301AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM301AD is usually 5 days.

3.What payment methods are accepted for LM301AD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM301AD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM301AD?

LM301AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM301AD 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 LM301AD?

For technical support, including LM301AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM301AD requirements.

6.How does Aetrix verify that LM301AD is sourced from the original manufacturer or authorized distributors?

All LM301AD 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 LM301AD meets industry standards.

7.What is the process for return or replacement of LM301AD?

All LM301AD units undergo pre-shipment inspection (PSI). If there is an issue with LM301AD, 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 LM301AD part is unused and in its original packaging.

Return procedure for LM301AD:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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