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STMicroelectronics UA741MN
- Part No.:
- UA741MN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
UA741MN.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,977
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Product details
Overview
UA741MN from STMicroelectronics is a general-purpose single operational amplifier in SO8 package, featuring ±22 V supply voltage range, 0.5 V/μs typical slew rate, 1 MHz gain-bandwidth product, and internal frequency compensation. It serves as a core analog building block in feedback circuits, active filters, and precision signal conditioning stages for industrial instrumentation.
For engineers reviewing the UA741MN datasheet, UA741MN pinout, UA741MN application, or UA741MN equivalent, key selection factors include input offset voltage (≤6 mV), output short-circuit current (10–40 mA), common-mode rejection ratio (70–90 dB), thermal resistance (125 °C/W for SO8), and compatibility with legacy UA709-based designs.
Technical Context
The UA741MN implements a classic bipolar input stage with NPN differential pair, followed by high-gain Darlington intermediate stage and Class-A/B output stage with short-circuit protection. Its internal 30 pF compensation capacitor ensures unconditional stability in unity-gain configurations without external components.
It operates across ±5 V to ±22 V dual supplies, supports ±12 V common-mode input range, and delivers ±10 V output swing into 2 kΩ load at 25 °C. The device exhibits 77 dB typical supply voltage rejection and 23 nV/√Hz input noise density at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±5 V to ±22 V - enables operation from low-voltage sensor interfaces up to industrial ±15 V rails |
| Slew Rate | 0.5 V/μs typ - limits large-signal bandwidth to ~160 kHz for 10 Vpp output, suitable for audio and control loops |
| Gain-Bandwidth Product | 1 MHz - defines closed-loop bandwidth of 100 kHz at gain = 10, usable in active filter cutoff design |
| Input Offset Voltage | 6 mV max - contributes ≤60 mV error in unity-gain buffer with 10 V input, requiring trimming in precision DC paths |
| Common-Mode Rejection | 90 dB max - rejects 1 V common-mode interference down to 10 μV at output in differential sensing |
| Output Short-Circuit Current | 40 mA max - sustains continuous fault current without latch-up, enabling robust front-end protection |
| Thermal Resistance (J-A) | 125 °C/W (SO8) - requires derating above 65 °C ambient when dissipating >150 mW in PCB layout |
Pinout & Package
UA741MN is supplied in SO8 (Small Outline, 8-pin) plastic micropackage per JEDEC MS-012, with gull-wing leads, 1.27 mm pitch, and 5.0 mm × 6.2 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset null (pin 1) | Connects to potentiometer wiper for manual input offset cancellation; required in precision DC-coupled applications |
| 2 | Inverting input | Primary feedback node in inverting amplifier, integrator, or summing configuration; high-impedance bipolar input |
| 3 | Non-inverting input | Reference input for follower, comparator, or non-inverting gain stages; matched to pin 2 for CMR performance |
| 4 | VCC− | Negative supply rail connection; must be decoupled locally to minimize noise coupling into input stage |
| 5 | Offset null (pin 2) | Second terminal of offset trim network; used with pin 1 to balance input transistor mismatch |
| 6 | Output | Class-A/B push-pull stage output; capable of ±10 V swing into 2 kΩ, with short-circuit limiting |
| 7 | VCC+ | Positive supply rail connection; referenced to pin 4 for symmetric dual-supply operation |
| 8 | No connect | Internally unconnected; must remain floating-no external tie or pull-up/pull-down allowed |
Key Features
| Feature | Design Value |
|---|---|
| No external frequency compensation required | Internal 30 pF capacitor ensures stable unity-gain operation without added components or layout risk |
| Large input voltage range | ±12 V common-mode range allows direct interfacing with ±10 V DACs or sensor outputs without level-shifting |
| Short-circuit protection | Active current limiting prevents damage during output faults, supporting reliable operation in test equipment |
| No latch-up behavior | Bipolar process with isolation trenches eliminates destructive parasitic SCR conduction under overvoltage stress |
| Same pinout as UA709 | Direct drop-in replacement for legacy designs using UA709, preserving PCB layout and schematic reuse |
Applications
| Audio Signal Preconditioning | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level microphone or piezoelectric sensor outputs before ADC sampling in portable test equipment. IC Role / Device Role / Timing Role: Non-inverting amplifier with gain = 100, AC-coupled input, and DC-blocking capacitor to reject bias drift. Use Value: 0.06% THD at 1 kHz ensures fidelity in audio band; 23 nV/√Hz input noise preserves SNR for µV-level signals. | Use Scenario: Converting 4–20 mA current loop signals to 0–5 V for PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Transimpedance amplifier with precision resistor feedback and offset-null adjustment for zero-point calibration. Use Value: 6 mV max input offset enables ≤0.1% full-scale error after trimming; ±22 V supply headroom accommodates loop compliance voltage. |
| Function Generator Waveform Shaping | Analog Control Loop Integrator |
Use Scenario: Generating triangle and square waves via integrator-comparator topology in benchtop signal sources. IC Role / Device Role / Timing Role: Integrator stage with matched capacitor/resistor time constant; driven by comparator hysteresis output. Use Value: 1 MHz GBW and 0.5 V/μs slew rate support linear ramp generation up to 10 kHz; internal compensation avoids phase shift errors. | Use Scenario: Implementing PI controller in motor drive current regulation where integration accuracy determines steady-state error. IC Role / Device Role / Timing Role: Precision integrator with low Iib (≤200 nA) and offset trim to minimize drift-induced windup over minutes. Use Value: 2 MΩ min input resistance reduces RC time constant error; ±12 V input range accepts wide-error signal swings without clipping. |
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 | Identical electrical specs and pinout; manufactured by Texas Instruments with same SO8 footprint but different internal ESD structure (HBM 1.5 kV vs. ST's 400 V) | Approved for commercial temperature range (0°C to +70°C); lacks extended industrial grade (-40°C to +105°C) rating | Select when cost sensitivity outweighs extended temp requirement and TI sourcing is preferred |
| NE5532N | Higher slew rate (9 V/μs), lower noise (5 nV/√Hz), dual-channel, but requires external compensation and has different pinout | Targeted at audio line drivers and low-noise preamps-not drop-in compatible due to pin mismatch and supply current (8 mA vs. 2.8 mA) | Choose only when upgrading performance in new designs; not suitable for UA741MN footprint replacement |
Compared with LM741CN, UA741MN offers broader temperature range and higher ESD robustness for industrial environments; versus NE5532N, it trades audio-grade performance for simplicity, stability, and legacy compatibility in general-purpose analog circuits.
Availability
UA741MN is available at Aetrix Electronics and suitable for industrial sensor interfaces, analog test equipment, and educational lab kits requiring stable component supply and long-term obsolescence management.
Supply support for UA741MN 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 microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The UA741MN belongs to ST's legacy analog amplifier portfolio, engineered for reliability, ease of use, and backward compatibility in maintenance and upgrade of decades-old analog systems.
FAQ
What is the maximum operating junction temperature for UA741MN?
The absolute maximum junction temperature is +150 °C, derived from its storage temperature limit and thermal resistance (125 °C/W). At 2.8 mA supply current and ±15 V supplies, typical power dissipation is 84 mW, allowing safe operation up to +85 °C ambient without heatsinking in standard SO8 layout.
Can UA741MN operate on a single supply?
Yes, UA741MN can operate on single supply (e.g., +30 V between pins 7 and 4) with input and output biased within the common-mode and output swing ranges. However, the input common-mode range is limited to 3 V below VCC+ and 3 V above VCC−, so proper level-shifting and reference generation are required for rail-to-rail signal handling.
Why does pin 8 show "N.C." and what happens if it is grounded?
Pin 8 is internally unconnected and must remain floating. Grounding or pulling it high introduces parasitic capacitance and potential leakage paths that degrade PSRR, increase offset drift, and may cause oscillation in high-gain configurations due to unintended coupling into the output stage.
How does the internal compensation affect bandwidth in non-unity-gain configurations?
The fixed 30 pF capacitor sets dominant-pole compensation at ~10 Hz, resulting in 1 MHz GBW. In non-unity-gain configurations (e.g., gain = 10), closed-loop bandwidth is ~100 kHz. This trade-off ensures stability but limits small-signal speed-no external compensation is possible due to lack of compensation pin access.
UA741MN 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:
- 10 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-DIP
UA741MN FAQ
1.How can I place an order for UA741MN through Aetrix?
Please submit a Request for Quotation (RFQ) for UA741MN 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 UA741MN reliable?
The price and inventory of UA741MN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UA741MN is usually 5 days.
3.What payment methods are accepted for UA741MN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UA741MN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UA741MN?
UA741MN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UA741MN 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 UA741MN?
For technical support, including UA741MN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UA741MN requirements.
6.How does Aetrix verify that UA741MN is sourced from the original manufacturer or authorized distributors?
All UA741MN 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 UA741MN meets industry standards.
7.What is the process for return or replacement of UA741MN?
All UA741MN units undergo pre-shipment inspection (PSI). If there is an issue with UA741MN, 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 UA741MN part is unused and in its original packaging.
Return procedure for UA741MN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UA741MN Tags
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LM358DT
STMicroelectronics
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Texas Instruments
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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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LM2902DR
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LM358P
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