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Texas Instruments LM741H
- Part No.:
- LM741H
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LM741H.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:432
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Product details
Overview
LM741H from Texas Instruments is a general-purpose operational amplifier in an 8-pin TO-99 metal can package, rated for operation from −55°C to +125°C, with ±22 V maximum supply voltage, 500 mW power dissipation, and 0.5 V/μs slew rate. It delivers 50–200 V/mV large-signal voltage gain and features 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 datasheet, LM741H pinout, LM741H application, or LM741H equivalent, key selection considerations include its military-grade temperature range (−55°C to +125°C), TO-99 thermal performance (RθJA = 170°C/W), offset null capability, and compatibility with legacy 709C/LM201/MC1439 designs.
Technical Context
The LM741H operates as a DC-coupled, high-gain voltage amplifier with internal frequency compensation enabling stable unity-gain operation. Its input stage uses a matched transistor pair with offset null terminals (pins 1 and 5) for precision trimming, while the output stage provides short-circuit protected push-pull drive.
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 output swing reaching ±13 V into 2 kΩ. Common-mode rejection exceeds 80 dB and supply voltage rejection exceeds 86 dB across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±22 V max - enables use in high-headroom industrial and military analog systems without external regulation |
| Operating Temperature | −55°C to +125°C - qualified per JM38510/10101 for aerospace and defense applications |
| Slew Rate | 0.5 V/μs - limits large-signal bandwidth to ~100 kHz but ensures stability in feedback loops |
| Input Offset Voltage | 6 mV max (−55°C to +125°C) - requires nulling for precision DC-coupled stages |
| Large-Signal Voltage Gain | 25 V/mV min - sufficient for closed-loop gains up to 1000 with adequate loop margin |
| Output Short-Circuit Current | 25 mA - supports direct driving of moderate loads like LEDs or small transducers |
| Common-Mode Rejection | 80 dB min - rejects noise on shared sensor reference lines in noisy environments |
Pinout & Package
LM741H is housed in an 8-pin hermetically sealed TO-99 metal can package (body size 9.08 mm × 9.08 mm), optimized for low thermal resistance (RθJC = 25°C/W) and EMI shielding in high-reliability analog circuits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 & Pin 5 | Offset Null | Connect external potentiometer (10 kΩ) between pins to trim input offset voltage to ≤1 mV |
| Pin 2 | Inverting Input | Differential input node; accepts feedback network for inverting amplifier or active filter configurations |
| Pin 3 | Noninverting Input | Differential input node; used for noninverting amplifiers, comparators, and voltage followers |
| Pin 4 | V− | Negative supply rail connection; must be decoupled with 0.1 μF capacitor near pin |
| Pin 6 | Output | Class-AB push-pull output capable of ±13 V swing into 2 kΩ load |
| Pin 7 | V+ | Positive supply rail connection; requires local 0.1 μF ceramic decoupling |
| Pin 8 | No Connect | Internally unconnected terminal; must remain floating - no external tie or grounding |
Key Features
| Feature | Design Value |
|---|---|
| Input/Output Overload Protection | Prevents permanent damage during transient overvoltage or short-circuit events without requiring external current limiting |
| No Latch-Up on CM Range Exceedance | Continues normal operation even when input common-mode voltage exceeds supply rails - critical for sensor front-ends |
| Offset Null Terminals | Enables precise DC calibration via external 10-kΩ potentiometer, reducing system-level drift in precision instrumentation |
| Pin-to-Pin Replacement | Direct drop-in substitute for LM709C, LM201, MC1439, and LM748 - preserves legacy PCB layouts and BOM continuity |
| Military Temperature Qualification | Validated per JM38510/10101 - meets MIL-PRF-38535 requirements for reliability in avionics and ground systems |
Applications
| Instrumentation Amplifier Front-End | Active Low-Pass Filter |
|---|---|
|
Use Scenario: Signal conditioning for thermocouple or strain gauge outputs in industrial data acquisition systems. IC Role / Device Role / Timing Role: First-stage DC-coupled amplifier providing gain, offset adjustment, and common-mode noise rejection. Use Value: Offset null pins (1 & 5) enable sub-mV baseline correction; −55°C to +125°C rating ensures operation in uncontrolled cabinet environments. |
Use Scenario: Anti-aliasing and noise suppression before ADC sampling in motor control feedback loops. IC Role / Device Role / Timing Role: Unity-gain stable second-order Sallen-Key topology implementing 10 kHz cutoff. Use Value: Internal compensation guarantees stability without external phase compensation components; TO-99 shielding reduces RF ingress. |
| Voltage Comparator | Analog Summing Node |
|
Use Scenario: Threshold detection for overvoltage protection in DC power supplies. IC Role / Device Role / Timing Role: Open-loop comparator comparing sensed rail voltage against precision reference. Use Value: No latch-up behavior allows reliable recovery after input transients exceed supply rails - avoids system lockup. |
Use Scenario: Combining multiple sensor signals (e.g., temperature, pressure, flow) into a composite control signal. IC Role / Device Role / Timing Role: Inverting summing amplifier with matched input resistors and virtual-ground node. Use Value: High input impedance (>0.3 MΩ) prevents loading of upstream sensors; overload protection safeguards against mismatched inputs. |
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 and −55°C to +125°C rating, but CDIP (NAB) package variant - identical electrical specs, different mechanical form factor | Used where through-hole ceramic DIP layout is preferred over metal-can mounting or heat sinking | Select LM741J only if board layout or procurement constraints require CDIP packaging; otherwise LM741H maintains thermal and shielding advantages |
| LM741CH/NOPB | Same TO-99 package but rated 0°C to +70°C only; RoHS-compliant finish; lower input offset drift (0.5 nA/°C vs. unspecified for LM741H) | Targeted at commercial-grade test equipment and consumer electronics where extended temperature range is unnecessary | Choose LM741CH/NOPB for cost-sensitive, non-military applications; LM741H remains mandatory for full-spec military/aerospace deployments |
Compared with LM741J and LM741CH/NOPB, the LM741H uniquely combines hermetic TO-99 packaging, full military temperature range, and JM38510 qualification - making it the sole option for legacy-replacement programs requiring guaranteed long-term availability and radiation-tolerant analog performance.
Availability
LM741H is available at Aetrix Electronics and suitable for industrial control systems, aerospace sensor interfaces, and defense-grade analog signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM741H 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 delivering analog, embedded processing, and connectivity solutions with over 90 years of innovation in high-reliability electronics.
The LM741H belongs to TI's legacy operational amplifier product line, designed specifically for backward-compatible replacement of obsolete 709C and LM201 devices in military, aerospace, and industrial analog systems.
FAQ
What is the maximum supply voltage for LM741H?
The LM741H supports a maximum dual-supply voltage of ±22 V, as specified in its Absolute Maximum Ratings table. This rating applies across its full operating temperature range (−55°C to +125°C) and enables use in high-headroom analog circuits without external regulation. Exceeding ±22 V risks permanent device damage, even momentarily.
Does LM741H require external compensation capacitors?
No, the LM741H is internally compensated and stable at unity gain - no external compensation capacitor is needed. Its dominant-pole compensation ensures phase margin >65° in standard configurations, eliminating the need for external components required by decompensated op-amps like the LM733.
How do I adjust input offset voltage on LM741H?
Use a 10 kΩ potentiometer connected between LM741H pins 1 and 5, with its wiper tied to V− (pin 4). Adjusting the potentiometer balances the input stage, reducing input offset voltage to ≤1 mV at room temperature. This nulling is essential for precision DC-coupled applications.
Is LM741H pin-compatible with LM741CN/NOPB?
Yes - LM741H (TO-99) and LM741CN/NOPB (PDIP) share identical 8-pin functional mapping and electrical specifications, but differ in package type, thermal performance, and temperature rating. PCB layout changes are required due to mechanical incompatibility, though schematic design remains unchanged.
What is the purpose of the NC pin on LM741H?
Pin 8 on the LM741H is designated "No Connect" and is internally unconnected. It must remain electrically floating - neither grounded nor tied to any voltage. Connecting pin 8 may cause unpredictable behavior or damage, as confirmed in TI's official pin function documentation for the LMC package.
LM741H 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:
- -
- 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 FAQ
1.How can I place an order for LM741H through Aetrix?
Please submit a Request for Quotation (RFQ) for LM741H 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 reliable?
The price and inventory of LM741H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM741H is usually 5 days.
3.What payment methods are accepted for LM741H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM741H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM741H?
LM741H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM741H 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?
For technical support, including LM741H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM741H requirements.
6.How does Aetrix verify that LM741H is sourced from the original manufacturer or authorized distributors?
All LM741H 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 meets industry standards.
7.What is the process for return or replacement of LM741H?
All LM741H units undergo pre-shipment inspection (PSI). If there is an issue with LM741H, 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 part is unused and in its original packaging.
Return procedure for LM741H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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