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Texas Instruments LM741H/NOPB
- Part No.:
- LM741H/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LM741H/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
LM741H/NOPB from Texas Instruments is a general-purpose operational amplifier in an 8-pin TO-99 metal can package, featuring ±22 V absolute maximum supply voltage, 500 mW power dissipation, and guaranteed operation from −55°C to +125°C. It delivers 200 V/mV large-signal voltage gain, 0.5 V/μs slew rate, and includes input/output overload protection and latch-up immunity when common-mode range is exceeded - widely used in analog signal conditioning, active filtering, and comparator circuits.
For engineers reviewing the LM741H/NOPB datasheet, LM741H/NOPB pinout, LM741H/NOPB application, or LM741H/NOPB equivalent, key selection considerations include its military-grade temperature range, TO-99 thermal performance (RθJA = 170°C/W), offset null capability, and direct plug-in compatibility with legacy 709C/LM201/MC1439 designs.
Technical Context
The LM741H/NOPB operates as a DC-coupled, high-gain voltage amplifier with internal frequency compensation for unity-gain stability. Its functional block includes differential input stage, gain stage, and Class-A output stage with short-circuit protection.
It supports both dual-supply (±5 V to ±22 V) and single-supply configurations, with input voltage range extending to ±13 V at ±15 V supplies and common-mode rejection ratio of 80–95 dB. No external compensation is required due to built-in dominant-pole compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±10 V to ±22 V - supports wide-range analog rails including industrial ±15 V systems |
| Operating Temperature | −55°C to +125°C - qualified for military and extended-temperature industrial use |
| Large-Signal Voltage Gain | 50–200 V/mV - enables precise amplification of low-level sensor signals without external gain stages |
| Slew Rate | 0.5 V/μs - limits full-power bandwidth to ~80 kHz, suitable for audio and control-loop applications |
| Input Offset Voltage | ≤6 mV (max) - adjustable via pins 1/5 to <1 mV, critical for precision DC-coupled instrumentation |
| Common-Mode Rejection | 80–95 dB - rejects noise on shared reference lines in noisy industrial environments |
| Output Short-Circuit Current | 25 mA - provides robust drive capability into low-impedance loads or fault conditions |
Pinout & Package
LM741H/NOPB uses an 8-pin TO-99 metal can package (9.08 mm × 9.08 mm body), offering superior thermal conduction and EMI shielding compared to plastic DIP variants. The hermetically sealed construction ensures long-term reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | Offset Null | Connect external potentiometer (10 kΩ) between pins 1/5 and V– to null input offset voltage |
| 2 | Inverting Input | Primary feedback node in inverting amplifier, integrator, or active filter topologies |
| 3 | Noninverting Input | Reference input for noninverting gain stages and comparator threshold setting |
| 4 | V– | Negative supply rail connection - must be decoupled with 0.1 µF capacitor near pin |
| 6 | Output | Class-A buffered output capable of ±13 V swing into 2 kΩ load at ±15 V supplies |
| 7 | V+ | Positive supply rail connection - requires local 0.1 µF ceramic decoupling |
| 8 | No Connect | Internally unconnected terminal - must remain floating; no PCB trace or component attached |
Key Features
| Feature | Design Value |
|---|---|
| Input/Output Overload Protection | Prevents latch-up or permanent damage during transient overvoltage or short-circuit events |
| No Latch-Up on Common-Mode Exceedance | Continues normal operation even when input voltages exceed supply rails - eliminates system resets |
| Offset Voltage Adjustment | Pins 1 and 5 enable trimming to sub-millivolt level - essential for precision DC measurement front-ends |
| Plug-In Replacement Compatibility | Direct pin-to-pin and electrical replacement for LM709C, LM201, MC1439, and LM748 in legacy designs |
| Hermetic TO-99 Packaging | Provides enhanced thermal dissipation (RθJC = 25°C/W) and EMI immunity for mission-critical analog paths |
Applications
| Instrumentation Amplifier Front-End | Industrial Analog Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level thermocouple or strain gauge outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Primary DC-stable gain stage with offset nulling for sub-mV signal resolution. Use Value: Guaranteed −55°C to +125°C operation ensures reliability in uncontrolled cabinet environments; TO-99 shielding reduces 50/60 Hz pickup. |
Use Scenario: Buffering and scaling 4–20 mA loop receiver outputs before ADC sampling. IC Role / Device Role / Timing Role: Unity-gain buffer with high input impedance (>0.3 MΩ) and low output impedance. Use Value: Input voltage range up to ±13 V accommodates common-mode transients on industrial field wiring. |
| Active Low-Pass Filter | Comparator with Hysteresis |
Use Scenario: Anti-aliasing filtering prior to SAR ADC in motor control current sensing. IC Role / Device Role / Timing Role: Second-order Sallen-Key topology using internal compensation and stable phase margin. Use Value: 0.5 V/μs slew rate limits passband to ~80 kHz - sufficient for 20 kHz motor PWM harmonics suppression. |
Use Scenario: Threshold detection of battery voltage in backup power systems with noise immunity. IC Role / Device Role / Timing Role: Open-loop comparator with positive feedback applied to pin 3 for Schmitt trigger behavior. Use Value: No latch-up under overdrive allows clean transitions even during slow-rising supply faults or brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM741J | Same TO-99 package, identical −55°C to +125°C rating, but without RoHS-compliant finish (Pb/Sn lead finish) | Acceptable where RoHS exemption applies (e.g., aerospace, defense); not suitable for EU-constrained commercial production | Select LM741J only if legacy Pb-based solder process is mandated and RoHS compliance is waived. |
| LM741CN/NOPB | PDIP-8 package, 0°C to +70°C rating, lower RθJA (100°C/W), RoHS-compliant green finish | Limited to commercial-temperature applications; less robust thermal/EMI performance than TO-99 | Choose LM741CN/NOPB for cost-sensitive, non-military board-level designs where size and reflow compatibility outweigh extended temp needs. |
Compared with LM741J and LM741CN/NOPB, the LM741H/NOPB uniquely combines military-grade temperature range, hermetic TO-99 packaging, and RoHS compliance - making it the only option for new designs requiring all three attributes simultaneously.
Availability
LM741H/NOPB is available at Aetrix Electronics and suitable for industrial control systems, test equipment calibration modules, and aerospace subsystems requiring stable component supply across extreme temperature cycles and long product lifecycles.
Supply support for LM741H/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies, with over 50 years of innovation in precision analog ICs.
The LM741 series was designed as a robust, drop-in upgrade to early op-amps like the LM709, targeting analog signal conditioning in industrial, military, and instrumentation systems where reliability and interoperability supersede cutting-edge specs.
FAQ
What is the maximum supply voltage for LM741H/NOPB?
The LM741H/NOPB has an absolute maximum supply voltage of ±22 V. Operation beyond this risks permanent damage. For reliable long-term use, TI recommends staying within ±10 V to ±22 V per the Recommended Operating Conditions table - with ±15 V being the nominal dual-supply configuration used in most design examples and characterization data.
Does LM741H/NOPB require external frequency compensation?
No, the LM741H/NOPB includes internal dominant-pole compensation and is unity-gain stable. No external capacitors or resistors are needed for basic inverting or noninverting amplifier configurations. This simplifies layout and eliminates tuning steps - a key advantage over decompensated op-amps like the LM733.
How do I adjust the input offset voltage on LM741H/NOPB?
Use a 10 kΩ potentiometer connected between pins 1 and 5, with its wiper tied to V– (pin 4). Adjusting the potentiometer balances the input differential pair and reduces input offset voltage to under 1 mV. This procedure is documented in TI's LM741 datasheet Section 5 (Pin Functions) and Figure 11 (Offset Null Configuration).
Is LM741H/NOPB pin-compatible with LM741CN/NOPB?
No - while both are 8-pin devices, LM741H/NOPB uses a TO-99 metal can package with different pin numbering and physical layout than the PDIP-8 LM741CN/NOPB. They share identical electrical pin functions (e.g., pin 2 = inverting input), but PCB footprints, thermal pads, and mounting methods are incompatible. Direct substitution requires board redesign.
What is the purpose of pin 8 on LM741H/NOPB?
Pin 8 on LM741H/NOPB is a No Connect (NC) terminal - it is internally unconnected and must remain electrically floating. Do not tie it to ground, V+, V–, or any other net. Leaving it unconnected prevents unintended coupling or parasitic effects that could degrade CMRR or noise performance in sensitive analog circuits.
LM741H/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 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:
- TO-99-8
LM741H/NOPB FAQ
1.How can I place an order for LM741H/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM741H/NOPB 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 LM741H/NOPB reliable?
The price and inventory of LM741H/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM741H/NOPB is usually 5 days.
3.What payment methods are accepted for LM741H/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM741H/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM741H/NOPB?
LM741H/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM741H/NOPB 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 LM741H/NOPB?
For technical support, including LM741H/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM741H/NOPB requirements.
6.How does Aetrix verify that LM741H/NOPB is sourced from the original manufacturer or authorized distributors?
All LM741H/NOPB 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 LM741H/NOPB meets industry standards.
7.What is the process for return or replacement of LM741H/NOPB?
All LM741H/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM741H/NOPB, 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 LM741H/NOPB part is unused and in its original packaging.
Return procedure for LM741H/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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