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STMicroelectronics LM201AD
- Part No.:
- LM201AD
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM201AD.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,758
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Product details
Overview
LM201AD from STMicroelectronics is a single general-purpose operational amplifier with ±5V to ±22V supply range, 0.7–2 mV input offset voltage, 25–75 nA input bias current, and 10 V/µs slew rate in inverting configuration. It operates from –40°C to +105°C and is used in precision analog signal conditioning for industrial sensor interfaces.
For engineers reviewing the LM201AD datasheet, LM201AD pinout, LM201AD application, or LM201AD equivalent, key selection factors include external compensation flexibility, input offset drift (3–15 µV/°C), output short-circuit robustness (10–30 mA), and DIP8/SO8 package compatibility across temperature grades.
Technical Context
The LM201AD uses a classic bipolar input stage with internal frequency compensation disabled-requiring an external 30 pF capacitor between pins 1 and 8 for stable unity-gain operation. Its open-loop gain exceeds 50 V/mV and common-mode rejection reaches 80 dB at 25°C.
It supports rail-to-rail input common-mode range (±15 V at ±20 V supplies) and delivers ±12 V output swing into 10 kΩ load. The device avoids latch-up when inputs exceed rails and includes built-in input/output overload protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±5 V to ±22 V - supports wide industrial power rails without level-shifting |
| Input Offset Voltage | 0.7 mV (typ), 2 mV (max) at 25°C - enables DC-coupled amplification with <100 µV error in 100× gain stages |
| Slew Rate | 10 V/µs (inverting config) - allows clean 1 MHz small-signal amplification with <1% distortion |
| Gain-Bandwidth Product | 0.5–1 MHz - sets usable closed-loop bandwidth limit for stable compensated designs |
| Input Bias Current | 25–75 nA (25°C) - permits high-impedance sensor interfacing (e.g., thermocouples, pH electrodes) |
| Operating Temperature | –40°C to +105°C - qualified for under-hood automotive and industrial control environments |
| Output Short-Circuit Current | 10–30 mA - sustains continuous fault current without damage during transient overloads |
Pinout & Package
LM201AD is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) plastic micropackage (SO8), 3.9 mm body width, 1.27 mm lead pitch, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Balance (Offset Null) | Connects to external potentiometer wiper for manual input offset trimming |
| 2 | Inverting Input (–) | Primary feedback node in standard op-amp configurations; high-impedance bipolar input |
| 3 | Non-inverting Input (+) | Reference input for follower, summing, or differential configurations |
| 4 | VCC– | Negative supply rail connection; must be decoupled near pin |
| 5 | Balance (Offset Null) | Second terminal of offset null network; tied to potentiometer ends |
| 6 | Output | Class-A/B output stage capable of ±12 V swing into 10 kΩ |
| 7 | VCC+ | Positive supply rail connection; requires local 0.1 µF ceramic decoupling |
| 8 | Compensation | External 30 pF capacitor connection point for dominant-pole compensation |
Key Features
| Feature | Design Value |
|---|---|
| Externally compensatable | Enables optimization of slew rate vs. bandwidth trade-off via single 30 pF capacitor |
| No latch-up on CMR violation | Continues functional operation even when input exceeds supply rails - critical for sensor fault tolerance |
| Input/output overload protection | Prevents damage during transient shorts or ESD events without external limiting components |
| Wide supply range | Operates from ±5 V (low-power systems) to ±22 V (industrial actuators), reducing need for multiple supply rails |
| Stable with capacitive loads | Maintains phase margin >45° driving up to 100 pF directly - simplifies filter interface design |
Applications
| Industrial Sensor Signal Conditioning | Thermocouple Amplifier Front-End |
|---|---|
Use Scenario: Amplifying low-level mV outputs from RTDs and strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset trimming and rail-compatible input range. Use Value: 0.7 mV max offset and 3 µV/°C drift ensure <1 LSB error in 12-bit ADC systems over –40°C to +85°C. | Use Scenario: Cold-junction compensation and linearization of Type-K thermocouple signals. IC Role / Device Role / Timing Role: High-Z differential amplifier with programmable gain and offset correction. Use Value: 25 nA input bias current prevents thermocouple loop error; ±15 V common-mode range accommodates reference junction offsets. |
| Programmable Gain Instrumentation Amplifier Core | Industrial Analog Output Driver |
Use Scenario: Building three-op-amp PGIA for 4–20 mA transmitter calibration circuits. IC Role / Device Role / Timing Role: Input-stage amplifier with matched input impedance and low noise (25 nV/√Hz). Use Value: External compensation allows 1 MHz GBW at G = 100, enabling fast step response in auto-calibration loops. | Use Scenario: Driving 4–20 mA current loop transmitters with HART modulation capability. IC Role / Device Role / Timing Role: Output buffer with short-circuit protected, rail-swinging capability. Use Value: ±12 V output swing into 250 Ω load ensures full 20 mA compliance; 30 mA short-circuit rating withstands loop faults. |
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 | 0°C to +70°C temp range; higher max offset (7.5 mV); same pinout and compensation | Restricted to commercial-grade systems without thermal stress | Select for cost-sensitive consumer electronics where extended temperature is unnecessary |
| TL081CP | JFET input (50 pA bias), higher GBP (3 MHz), but no offset null pins or overload protection | Lacks manual trimming and fault resilience needed in industrial field devices | Choose only for high-Z AC-coupled audio or test equipment where input bias dominates performance |
Compared with LM301AN and TL081CP, the LM201AD uniquely balances industrial temperature range, user-adjustable offset, and robust input/output protection-making it the only choice for unattended sensor nodes requiring long-term DC accuracy and fault tolerance.
Availability
LM201AD is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) analog I/O modules, and 4–20 mA transmitter designs requiring stable component supply across extended temperature ranges.
Supply support for LM201AD 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 LM201A series belongs to ST's legacy precision op-amp product line, engineered specifically for industrial instrumentation where external compensation, temperature stability, and ruggedness outweigh integration convenience.
FAQ
What compensation capacitor value is required for stable unity-gain operation?
A 30 pF capacitor must be placed between pins 1 and 8 for stable unity-gain operation. This value is specified in ST's official datasheet and validated across –40°C to +105°C. Using larger values reduces bandwidth and slew rate; smaller values risk oscillation in high-gain configurations.
Can LM201AD drive a 100 pF capacitive load directly?
Yes - the LM201AD maintains ≥45° phase margin when driving up to 100 pF directly, per ST's characterization data. This eliminates need for isolation resistors in anti-aliasing filter stages, preserving signal integrity in precision data acquisition paths.
Does LM201AD support dual-supply operation only, or can it run on single supply?
LM201AD is designed for dual-supply operation (±5 V to ±22 V). It does not support true single-supply operation because its input common-mode range excludes the negative rail, and output cannot swing to either rail. For single-supply use, consider rail-to-rail alternatives like TS912.
Is there a recommended layout practice for the offset null terminals (pins 1 and 5)?
Yes - connect a 10 kΩ potentiometer with both ends to VCC– and VCC+, and the wiper to pin 1; pin 5 connects to the opposite end of the pot. Keep traces short and symmetric, avoid noisy ground paths, and place the pot near the IC to minimize pickup on the high-impedance null network.
LM201AD 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:
- 25 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM201AD FAQ
1.How can I place an order for LM201AD through Aetrix?
Please submit a Request for Quotation (RFQ) for LM201AD 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 LM201AD reliable?
The price and inventory of LM201AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM201AD is usually 5 days.
3.What payment methods are accepted for LM201AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM201AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM201AD?
LM201AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM201AD 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 LM201AD?
For technical support, including LM201AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM201AD requirements.
6.How does Aetrix verify that LM201AD is sourced from the original manufacturer or authorized distributors?
All LM201AD 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 LM201AD meets industry standards.
7.What is the process for return or replacement of LM201AD?
All LM201AD units undergo pre-shipment inspection (PSI). If there is an issue with LM201AD, 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 LM201AD part is unused and in its original packaging.
Return procedure for LM201AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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