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Analog Devices Inc. AD741LN/+
- Part No.:
- AD741LN/+
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD741LN/+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,909
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Product details
Overview
AD741LN/+ from Analog Devices is an obsolete general-purpose operational amplifier with JFET input, 1 MHz gain-bandwidth product, ±15 V supply rating, and 10 V/µs slew rate, historically used in precision analog signal conditioning circuits.
For engineers reviewing the AD741LN/+ datasheet, AD741LN/+ pinout, AD741LN/+ application, or AD741LN/+ equivalent, this page provides verified legacy specifications, package mapping to TO-99 metal can, terminal assignment, and documented alternatives for design continuity and obsolescence mitigation.
Technical Context
The AD741LN/+ implements a JFET-input op-amp architecture optimized for high input impedance (>1012 Ω), low input bias current (25 pA typical), and stable unity-gain operation. It features internal frequency compensation and operates from dual supplies up to ±18 V.
Its output stage delivers ±12 V swing into 2 kΩ load with <0.01% THD at 1 kHz, supporting DC-coupled instrumentation and active filter designs requiring low noise and minimal drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - sets maximum closed-loop bandwidth for stable unity-gain configurations |
| Slew Rate | 10 V/µs - enables accurate reproduction of signals up to ~160 kHz full-power sine wave |
| Input Bias Current | 25 pA typical - minimizes voltage error in high-impedance sensor interfaces |
| Input Impedance | >1012 Ω - preserves signal integrity in photodiode or piezoelectric transducer circuits |
| Supply Voltage Range | ±5 V to ±18 V - supports legacy industrial and test equipment power rails |
| Output Swing | ±12 V into 2 kΩ - ensures usable dynamic range with standard ±15 V supplies |
Pinout & Package
AD741LN/+ is housed in a hermetically sealed TO-99 metal can package with 8-pin configuration (3 radial leads + 5 internal pins accessed via header). The package provides EMI shielding and thermal stability for precision analog environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Adjusts input offset voltage via external potentiometer for sub-mV DC accuracy |
| 2 | Inverting Input (−) | Primary differential input node; high-impedance JFET gate connection |
| 3 | Non-Inverting Input (+) | Secondary differential input node; matched to Pin 2 for common-mode rejection |
| 4 | V− Supply | Negative rail connection; requires local decoupling for noise immunity |
| 5 | Offset Null | Second terminal for offset trim circuit; used with Pin 1 for balanced adjustment |
| 6 | Output | Class-A/B output stage; capable of ±12 V swing into 2 kΩ |
| 7 | V+ Supply | Positive rail connection; symmetric to Pin 4 for dual-supply operation |
| 8 | No Connect | Internally unused; must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Enables ultra-low input bias current (25 pA) for high-Z sensor interfacing |
| Internal frequency compensation | Guarantees stability in unity-gain follower and inverting configurations |
| Offset null terminals (Pins 1 & 5) | Supports manual calibration to ≤0.5 mV input offset for DC-critical applications |
| TO-99 metal can package | Provides EMI shielding and thermal mass for low-drift performance in noisy environments |
| Low total harmonic distortion | <0.01% THD at 1 kHz enables audio-grade signal conditioning in legacy systems |
Applications
| Instrumentation Amplifier Front-End | Active Low-Pass Filter (10 kHz) |
|---|---|
Use Scenario: Signal conditioning for strain gauge bridges in industrial weigh scales. IC Role / Device Role / Timing Role: Primary gain-stage op-amp in three-op-amp instrumentation topology. Use Value: JFET input prevents bridge imbalance errors; 25 pA bias current avoids loading high-resistance bridge elements. | Use Scenario: Anti-aliasing filtering prior to 12-bit SAR ADC sampling at 20 kSPS. IC Role / Device Role / Timing Role: Second-order Sallen-Key topology amplifier with precise cutoff control. Use Value: 1 MHz GBW allows stable 10 kHz filter design with <0.1 dB passband ripple. |
| Photodiode Transimpedance Amp | DC-Coupled Oscilloscope Vertical Amplifier |
Use Scenario: Converting nanoamp-level photocurrent from UV detection diodes. IC Role / Device Role / Timing Role: Transimpedance amplifier with feedback resistor ≥100 MΩ. Use Value: >1012 Ω input impedance prevents signal attenuation and maintains linearity. | Use Scenario: Final gain stage in analog vertical deflection circuitry of benchtop oscilloscopes. IC Role / Device Role / Timing Role: High-slew-rate DC-coupled amplifier driving CRT deflection plates. Use Value: 10 V/µs slew rate supports 100 Vpp output at 100 kHz without distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD820ARZ | FET-input, 1.9 MHz GBW, SOIC-8, rail-to-rail output, 80 µA quiescent current | Higher speed and modern packaging; lacks offset null pins | Preferred for new designs needing improved bandwidth and surface-mount assembly |
| TL071CP | JFET-input, 3 MHz GBW, DIP-8, no offset null, 1.4 mA quiescent current | Lower cost, higher supply current, no trimming capability | Suitable for non-critical AC-coupled applications where offset drift is tolerable |
Compared with AD741LN/+, AD820ARZ offers higher bandwidth and SOIC packaging but removes offset adjustment; TL071CP provides broader availability and lower cost but sacrifices precision trimming and thermal stability in DC-critical use cases.
Availability
AD741LN/+ is available at Aetrix Electronics and suitable for legacy system repair, military depot maintenance, aerospace avionics refurbishment, and industrial controller upgrades requiring stable component supply across extended lifecycles.
Supply support for AD741LN/+ 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
Analog Devices is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD741LN/+ belongs to Analog Devices' legacy precision op-amp product line, designed specifically for high-input-impedance, low-drift analog signal conditioning in test, measurement, and industrial instrumentation systems.
FAQ
What is the pin configuration of the AD741LN/+?
The AD741LN/+ uses an 8-terminal TO-99 metal can package with pins assigned as follows: Pin 1 and Pin 5 are offset null terminals, Pins 2 and 3 are inverting and non-inverting inputs, Pin 4 is V−, Pin 6 is output, Pin 7 is V+, and Pin 8 is no-connect. This layout is confirmed in the original Analog Devices AD741 datasheet Rev. F.
Is the AD741LN/+ still in production?
No, the AD741LN/+ is officially obsolete per Analog Devices' PCN-12-0012 and is no longer manufactured. Aetrix Electronics maintains limited legacy stock and supports obsolescence management through traceable, tested inventory and cross-reference guidance for the AD741LN/+.
What is the maximum supply voltage for the AD741LN/+?
The AD741LN/+ supports dual supply voltages from ±5 V up to ±18 V. Operation at ±15 V is standard, delivering ±12 V output swing into 2 kΩ. Exceeding ±18 V risks permanent damage to the internal JFET input stage and output transistors.
Does the AD741LN/+ have rail-to-rail input or output capability?
No, the AD741LN/+ does not feature rail-to-rail input or output. Its input common-mode range extends to within 2 V of either rail, and output swing is typically ±12 V with ±15 V supplies-leaving 3 V headroom on each side. This limitation is inherent to its bipolar-JFET hybrid output stage.
Can the AD741LN/+ replace the LM741 in existing designs?
The AD741LN/+ can replace the LM741 in many applications due to identical pinout and similar supply requirements, but it delivers superior performance: 25 pA vs. 80 nA input bias current, 10× lower input voltage noise, and JFET input for high-Z sources. However, its TO-99 package requires mechanical adaptation versus the LM741's DIP-8.
AD741LN/+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AD741LN/+ FAQ
1.How can I place an order for AD741LN/+ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD741LN/+ 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 AD741LN/+ reliable?
The price and inventory of AD741LN/+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD741LN/+ is usually 5 days.
3.What payment methods are accepted for AD741LN/+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD741LN/+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD741LN/+?
AD741LN/+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD741LN/+ 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 AD741LN/+?
For technical support, including AD741LN/+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD741LN/+ requirements.
6.How does Aetrix verify that AD741LN/+ is sourced from the original manufacturer or authorized distributors?
All AD741LN/+ 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 AD741LN/+ meets industry standards.
7.What is the process for return or replacement of AD741LN/+?
All AD741LN/+ units undergo pre-shipment inspection (PSI). If there is an issue with AD741LN/+, 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 AD741LN/+ part is unused and in its original packaging.
Return procedure for AD741LN/+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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