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Texas Instruments LM741CH
- Part No.:
- LM741CH
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LM741CH.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:166
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Product details
Overview
LM741CH from Texas Instruments is a general-purpose operational amplifier in an 8-pin TO-99 metal can package, rated for 0°C to +70°C operation. It delivers 500 mW power dissipation, ±15 V recommended supply voltage, 0.5 V/μs slew rate, and 200 V/mV large-signal voltage gain. It serves as a plug-in replacement for LM709C, LM201, MC1439, and LM748 in analog signal conditioning, integrator, and summing amplifier circuits.
For engineers reviewing the LM741CH datasheet, LM741CH pinout, LM741CH application, or LM741CH equivalent, key selection criteria include input offset voltage (2–7.5 mV), common-mode rejection ratio (70–90 dB), thermal resistance (170°C/W junction-to-ambient), and compatibility with dual-supply ±15 V systems requiring robust overload protection and latch-up immunity.
Technical Context
The LM741CH implements a classic bipolar-input op-amp architecture with internal frequency compensation, enabling stable unity-gain operation without external components. Its input stage uses a differential pair with active load, while output stage features Class AB push-pull with short-circuit current limiting.
It operates in both open-loop (e.g., comparator mode) and closed-loop configurations (e.g., noninverting amplifier with gain = 1 + R₂/R₁). Input common-mode range extends to ±13 V at ±15 V supplies, and output swing reaches ±13 V into ≥2 kΩ loads - enabling rail-to-rail usable dynamic range in legacy industrial analog designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±10 V to ±18 V - supports dual-rail operation in legacy instrumentation without level-shifting circuitry |
| Input Offset Voltage | 2–7.5 mV - determines DC error in precision amplification; null pins (1 & 5) allow manual trimming |
| Slew Rate | 0.5 V/μs - limits full-power bandwidth to ~80 kHz; suitable for audio and control-loop applications |
| Large-Signal Voltage Gain | 20–200 V/mV - provides ≥40 dB open-loop gain margin for stable feedback design at DC/low frequencies |
| CMRR | 70–90 dB - rejects noise coupled equally to both inputs, critical in sensor front-ends with noisy grounds |
| Power Dissipation | 500 mW - defines maximum continuous output drive capability before thermal shutdown in TO-99 package |
| Operating Temperature | 0°C to +70°C - commercial-grade rating; distinct from military-grade LM741H (−55°C to +125°C) |
Pinout & Package
LM741CH is housed in an 8-pin TO-99 metal can package (body size 9.08 mm × 9.08 mm), providing electromagnetic shielding and low thermal resistance (RθJA = 170°C/W). The hermetically sealed metal case ensures long-term reliability in industrial environments with EMI exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | Offset Null | Connects to potentiometer wiper for manual input offset cancellation - essential for DC-coupled precision applications |
| 2 | Inverting Input | Differential input node where feedback network connects - sets gain and stability in inverting amplifier topologies |
| 3 | Noninverting Input | Differential input node used for high-Z signal injection - enables unity-gain buffer and noninverting amplifier configurations |
| 4 | V− | Negative supply rail connection - must be decoupled with 0.1 µF capacitor placed adjacent to pin for stability |
| 6 | Output | Class AB push-pull output stage - capable of ±25 mA short-circuit current with built-in thermal foldback |
| 7 | V+ | Positive supply rail connection - requires local 0.1 µF ceramic decoupling to suppress supply-induced oscillation |
| 8 | No Connect | Internally unconnected terminal - must remain floating; no external tie or grounding permitted |
Key Features
| Feature | Design Value |
|---|---|
| Input/Output Overload Protection | Prevents permanent damage during transient overvoltage or output short-circuit events - eliminates need for external current-limiting resistors |
| No Latch-Up on CM Range Exceedance | Continues functional operation even when input voltages exceed supply rails - avoids system reset in sensor saturation scenarios |
| Pin-to-Pin Replaceability | Direct drop-in replacement for LM709C, LM201, MC1439, and LM748 - enables legacy design refresh without PCB rework |
| Internal Frequency Compensation | Guarantees unity-gain stability without external compensation capacitors - simplifies layout and reduces BOM count |
| High Input Resistance | 0.3–2 MΩ input impedance - minimizes loading on high-impedance sources like piezoelectric sensors or passive filters |
Applications
| DC Amplifiers | Summing Amplifiers |
|---|---|
Use Scenario: Amplifying low-level DC signals from thermocouples or strain gauges in industrial process controllers. IC Role / Device Role / Timing Role: Precision DC-coupled gain block with offset null adjustment to eliminate thermal drift errors. Use Value: Maintains <7.5 mV input offset across 0°C–70°C, enabling sub-100 µV resolution in 12-bit ADC interfaces without calibration. | Use Scenario: Combining multiple analog sensor outputs (e.g., temperature, pressure, flow) into a single composite control signal. IC Role / Device Role / Timing Role: Inverting summing node with matched input resistors to preserve signal integrity and channel independence. Use Value: Delivers 200 V/mV open-loop gain and 70 dB CMRR to reject common-mode noise from distributed sensor wiring. |
| Integrator or Differentiators | Active Filters |
Use Scenario: Building analog PID controllers in motor drives where integration time constants must remain stable over temperature. IC Role / Device Role / Timing Role: High-gain integrator core using capacitor in feedback path and precision resistor at inverting input. Use Value: Low input bias current (≤0.8 µA) prevents capacitor leakage-induced drift, ensuring accurate long-time-constant integration. | Use Scenario: Implementing second-order low-pass filtering in audio preamplifier stages to suppress RF interference. IC Role / Device Role / Timing Role: Dual-stage active filter section using Sallen-Key topology with gain-setting resistors and timing capacitors. Use Value: 0.5 V/μs slew rate and 200 V/mV gain support clean 20 kHz passband response without slew-induced distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM741CN/NOPB | Same electrical specs but in 8-pin PDIP package; higher RθJA (100°C/W vs. 170°C/W); no metal shielding | Better suited for cost-sensitive PCB assemblies where EMI immunity is not critical and through-hole mounting is preferred | Select LM741CN/NOPB when board space allows larger footprint and thermal management relies on copper pour rather than package conduction |
| LM741H/NOPB | Identical TO-99 package but rated for −55°C to +125°C; higher input offset voltage (up to 6 mV) and wider supply range (±22 V) | Required for aerospace, defense, or under-hood automotive applications demanding extended temperature operation | Choose LM741H/NOPB only when operating beyond 0°C–70°C or requiring ±22 V supply tolerance - not a direct substitute for LM741CH in commercial designs |
Compared with LM741CN/NOPB, LM741CH offers superior EMI shielding and lower thermal resistance but at higher unit cost and assembly complexity; versus LM741H/NOPB, it trades extended temperature range for tighter offset voltage spec and lower price in commercial-grade deployments.
Availability
LM741CH is available at Aetrix Electronics and suitable for industrial process control, test equipment calibration, and legacy analog subsystems requiring stable component supply with long-lifecycle support.
Supply support for LM741CH 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 op-amp innovation.
The LM741 product line was engineered for broad analog signal conditioning in industrial, instrumentation, and educational applications - prioritizing robustness, ease of use, and backward compatibility over ultra-low noise or rail-to-rail performance.
FAQ
What is the maximum supply voltage for LM741CH?
The absolute maximum supply voltage for LM741CH is ±18 V, with recommended operating range of ±10 V to ±15 V. Exceeding ±18 V risks permanent damage per Absolute Maximum Ratings. The LM741CH datasheet specifies this limit explicitly for the TO-99 packaged variant, distinguishing it from the ±22 V rating of the LM741H version.
Does LM741CH require external compensation capacitors?
No, LM741CH includes internal frequency compensation and is stable at unity gain without external capacitors. This design eliminates layout sensitivity and reduces bill-of-materials count. The LM741CH datasheet confirms unity-gain stability across its full operating temperature range (0°C to +70°C), making it suitable for straightforward noninverting and inverting amplifier implementations.
How do I adjust input offset voltage on LM741CH?
LM741CH provides dedicated offset null pins (1 and 5) for manual trimming. Connect a 10-kΩ potentiometer between pins 1 and 5, with its wiper tied to V− (pin 4). Adjusting the potentiometer balances internal input transistors to reduce input offset voltage to near zero - critical for DC-coupled precision applications. This function is documented in the LM741CH datasheet Pin Functions table and Electrical Characteristics section.
Is LM741CH RoHS compliant?
Yes, LM741CH/NOPB is RoHS compliant and marked "Green (RoHS & no Sb/Br)" in TI's packaging addendum. It contains no lead, bromine, or antimony-based flame retardants, meeting EU Directive 2011/65/EU requirements. The "NOPB" suffix explicitly denotes lead-free finish, and TI's official orderable device status confirms compliance for this specific TO-99 variant.
Can LM741CH operate from a single supply?
Yes, LM741CH supports single-supply operation by biasing the inputs and output within the valid common-mode and output voltage ranges. For example, with +30 V and ground, inputs must stay between +2 V and +28 V, and output swings from +2 V to +28 V into ≥2 kΩ. The LM741CH datasheet confirms this capability in Section 7.1 and Figure 1 of Application and Implementation, though dual-supply ±15 V remains the recommended configuration.
LM741CH 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:
- 2 mV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
LM741CH FAQ
1.How can I place an order for LM741CH through Aetrix?
Please submit a Request for Quotation (RFQ) for LM741CH 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 LM741CH reliable?
The price and inventory of LM741CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM741CH is usually 5 days.
3.What payment methods are accepted for LM741CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM741CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM741CH?
LM741CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM741CH 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 LM741CH?
For technical support, including LM741CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM741CH requirements.
6.How does Aetrix verify that LM741CH is sourced from the original manufacturer or authorized distributors?
All LM741CH 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 LM741CH meets industry standards.
7.What is the process for return or replacement of LM741CH?
All LM741CH units undergo pre-shipment inspection (PSI). If there is an issue with LM741CH, 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 LM741CH part is unused and in its original packaging.
Return procedure for LM741CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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