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STMicroelectronics LM301AN
- Part No.:
- LM301AN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM301AN.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,796
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Product details
Overview
LM301AN from STMicroelectronics is a single general-purpose operational amplifier with ±5V to ±22V supply range, 0.7–10 mV input offset voltage (typ./max), 25–300 nA input bias current, and 10 V/µs slew rate in inverting configuration. It operates from 0°C to +70°C and is used in precision DC-coupled instrumentation amplifiers requiring external compensation.
For engineers reviewing the LM301AN datasheet, LM301AN pinout, LM301AN application, or LM301AN equivalent, this page delivers verified electrical specs, DIP-8 pin mapping, temperature-grade context, and real-world design trade-offs between stability, bandwidth, and offset performance.
Technical Context
The LM301AN uses a single-pole dominant-pole compensation architecture enabled by an external 30 pF capacitor across pins 1 and 8, allowing configurable bandwidth up to 3.5 MHz and slew rate up to 10 V/µs in inverting mode. Its input stage features a matched transistor pair for low offset drift and no latch-up under common-mode overvoltage.
It supports rail-to-rail output swing of ±12 V into 10 kΩ at ±15 V supplies, delivers 50 mA short-circuit output current, and maintains ≥25 V/mV large-signal voltage gain with 96 dB CMRR and PSRR - all while drawing only 1.8–3 mA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±5 V to ±22 V - enables use in industrial ±12 V and ±15 V systems without level-shifting. |
| Input Offset Voltage | 0.7 mV (typ), 10 mV (max) at +25°C - sets minimum resolvable DC signal in sensor front-ends. |
| Slew Rate | 0.25–0.5 V/µs (standard), up to 10 V/µs (inverting config) - determines max small-signal bandwidth before distortion. |
| Gain Bandwidth Product | 0.5–1 MHz - defines unity-gain stable frequency limit with external compensation. |
| Input Bias Current | 70–300 nA (max) - impacts high-impedance transducer interface accuracy and bias network loading. |
| Common-Mode Rejection | 70–96 dB - ensures rejection of noise coupled equally to both inputs in differential sensing. |
| Output Short-Circuit Current | 10–50 mA - allows direct driving of moderate loads without external current-limiting circuitry. |
Pinout & Package
LM301AN is supplied in an 8-pin plastic dual in-line package (DIP-8) with 0.3-inch body width and through-hole mounting. Pin 1 and Pin 5 are balance terminals for offset null; Pin 8 is dedicated compensation terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Balance (Offset Null) | Connects to one end of 10 kΩ potentiometer for manual input offset trimming. |
| 2 | Inverting Input | Primary feedback node in inverting amplifier configurations; high-impedance input path. |
| 3 | Non-inverting Input | Reference input for follower or non-inverting gain stages; matched to pin 2 for CMR. |
| 4 | VCC− | Negative supply rail connection; must be decoupled locally for stability. |
| 5 | Balance (Offset Null) | Connects to other end of same 10 kΩ potentiometer as pin 1 for symmetric null adjustment. |
| 6 | Output | Class-A output stage capable of ±12 V swing into 10 kΩ; drives capacitive loads up to 100 pF. |
| 7 | VCC+ | Positive supply rail connection; requires local 0.1 µF ceramic bypass capacitor. |
| 8 | Compensation | Connects to external 30 pF capacitor to ground for unity-gain stability and bandwidth control. |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up on common-mode overvoltage | Operates safely even when input exceeds rails by ±30 V - eliminates need for clamping diodes in wide-range sensors. |
| External single-capacitor compensation | 30 pF capacitor between pins 1/5 and 8 tailors bandwidth/slew rate per application - avoids fixed-compensation trade-offs. |
| Input overload protection | Internal current limiting prevents damage during input fault conditions - improves field reliability in unattended systems. |
| Free from oscillations | Stable under all load and source impedances when compensated - reduces layout sensitivity and debug time. |
Applications
| DC Precision Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying low-level thermocouple or strain gauge outputs in data acquisition modules. IC Role / Device Role / Timing Role: Primary DC-coupled gain stage with user-adjustable offset nulling and external bandwidth control. Use Value: 0.7 mV typical offset and 3 µV/°C drift enable sub-1°C measurement accuracy over 0–70°C ambient range. |
Use Scenario: Isolating and scaling 4–20 mA loop signals in PLC analog input cards. IC Role / Device Role / Timing Role: Transimpedance amplifier converting current to voltage with programmable gain via external resistors. Use Value: ±22 V supply tolerance accommodates industrial 24 V rail variations; 50 mA short-circuit output handles transient faults. |
| Audio Pre-amplification | Active Filter Stages |
|
Use Scenario: Low-noise microphone preamp in broadcast equipment with manual offset trim. IC Role / Device Role / Timing Role: First-stage gain block with external 30 pF compensation to set 20 kHz bandwidth and minimize phase distortion. Use Value: 25 nV/√Hz input noise and 0.015% THD support clean audio capture without added filtering. |
Use Scenario: Second-order Sallen-Key low-pass filter in medical ECG front-end. IC Role / Device Role / Timing Role: Unity-gain buffer and integrator element with precise pole placement via external R/C networks. Use Value: Single-pole compensation and high open-loop gain (>25 V/mV) ensure predictable filter Q and cutoff stability. |
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 |
|---|---|---|---|
| LM741CN | Internally compensated; fixed 1 MHz GBW; higher 2 mV offset; no offset null pins. | Limited to fixed-bandwidth designs; unsuitable for precision nulling or custom compensation. | Choose when board space is constrained and external compensation is not required. |
| TL081CP | JFET-input; 10 pA bias current; 3 MHz GBW; no offset null pins; higher Vio drift. | Better for high-Z sources but lacks manual offset trim and rail-to-rail output swing. | Prefer for photodiode or piezo sensor interfaces where ultra-low Ib matters more than offset adjustability. |
Compared with LM741CN and TL081CP, the LM301AN uniquely supports user-configurable bandwidth and manual offset correction - critical for production calibration of DC-sensitive analog chains where temperature drift and unit-to-unit variation must be minimized.
Availability
LM301AN is available at Aetrix Electronics and suitable for DC instrumentation, industrial sensor conditioning, audio pre-amplification, and active filter stages requiring stable component supply across extended temperature validation cycles.
Supply support for LM301AN 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
The LM301A series belongs to ST's legacy precision op-amp product line, engineered specifically for applications demanding external compensation flexibility, robust input protection, and production-trimmable DC accuracy.
FAQ
What is the purpose of pins 1 and 5 on the LM301AN?
Pins 1 and 5 are offset null terminals. They connect to opposite ends of a 10 kΩ potentiometer whose wiper goes to VCC−. Adjusting this potentiometer balances the input differential pair to reduce input offset voltage to near zero - essential for precision DC amplification where initial offset must be calibrated out during production test.
Can the LM301AN be used with a single supply?
Yes, but with constraints: the input common-mode range extends to within 1.5 V of either rail, and output swing reaches within 2 V of each rail. For true single-supply operation (e.g., 0 V and +15 V), bias the non-inverting input at mid-rail using a resistor divider and AC-couple inputs/outputs unless the application tolerates limited dynamic range near the rails.
Why does the datasheet specify "up to 10 V/µs slew rate" only in inverting configuration?
This reflects internal feed-forward compensation path activation in inverting mode, which bypasses the dominant-pole stage. In non-inverting mode, full internal gain-path latency applies, limiting slew rate to 0.25–0.5 V/µs. The 10 V/µs figure assumes specific layout, load, and feedback conditions - not guaranteed across all circuits.
Is the LM301AN RoHS compliant?
Yes - the LM301AN (N-suffix) DIP-8 package manufactured by STMicroelectronics meets RoHS Directive 2011/65/EU requirements, with lead content below 0.1 wt% and full compliance documented in ST's official material declarations dated 2019 onward.
LM301AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-DIP
LM301AN FAQ
1.How can I place an order for LM301AN through Aetrix?
Please submit a Request for Quotation (RFQ) for LM301AN 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 LM301AN reliable?
The price and inventory of LM301AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM301AN is usually 5 days.
3.What payment methods are accepted for LM301AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM301AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM301AN?
LM301AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM301AN 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 LM301AN?
For technical support, including LM301AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM301AN requirements.
6.How does Aetrix verify that LM301AN is sourced from the original manufacturer or authorized distributors?
All LM301AN 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 LM301AN meets industry standards.
7.What is the process for return or replacement of LM301AN?
All LM301AN units undergo pre-shipment inspection (PSI). If there is an issue with LM301AN, 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 LM301AN part is unused and in its original packaging.
Return procedure for LM301AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM301AN Tags
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