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STMicroelectronics TL081ACN
- Part No.:
- TL081ACN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL081ACN.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,015
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Product details
Overview
TL081ACN from STMicroelectronics is a JFET-input single operational amplifier optimized for general-purpose analog signal conditioning in industrial and consumer systems. It delivers 16 V/µs typical slew rate, ±11 V input common-mode range (with ±15 V supply), 10¹² Ω input resistance, and 80 dB minimum CMRR at +25°C - enabling stable DC-coupled amplification in sensor front-ends and active filters.
For engineers reviewing the TL081ACN datasheet, TL081ACN pinout, TL081ACN application, or TL081ACN equivalent, key selection criteria include input bias current (≤20 nA typ), offset voltage drift (10 µV/°C), output short-circuit protection, and DIP8 package compatibility with legacy through-hole PCB layouts.
Technical Context
The TL081ACN integrates a high-voltage JFET input stage with bipolar output transistors on a monolithic die, achieving latch-up-free operation and internal frequency compensation for unity-gain stability. Its JFET inputs enable ultra-low input bias current and high DC precision without external nulling circuitry in many applications.
Designed for ±5 V to ±18 V dual-supply operation, it supports rail-to-rail input common-mode voltage up to VCC+ and features differential input voltage tolerance of ±30 V. The device operates across 0°C to +70°C ambient temperature and maintains 2.5 MHz gain-bandwidth product with 45° phase margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 16 V/µs typical - enables faithful reproduction of fast-rising signals up to ~1 MHz in unity-gain buffer configurations. |
| Input Bias Current | 20 nA max at +25°C - minimizes voltage error across high-impedance source networks (e.g., photodiode amps, RC filter nodes). |
| Input Offset Voltage | 3 mV max - ensures ≤30 mV output error in non-inverting gain-of-10 configurations without trimming. |
| Common-Mode Rejection | 80 dB min - suppresses power supply ripple and shared-noise coupling in single-supply-derived dual-rail systems. |
| Supply Voltage Range | ±6 V to ±18 V - supports operation from standard ±12 V industrial rails up to ±15 V test equipment supplies. |
| Gain-Bandwidth Product | 2.5 MHz typical - defines usable closed-loop bandwidth of ~250 kHz at gain = 10, suitable for audio and instrumentation filtering. |
| Input Resistance | 10¹² Ω - prevents loading of high-Z sources such as piezoelectric sensors or passive RC networks. |
Pinout & Package
Dual in-line plastic package (DIP8) with 0.3-inch body width and through-hole mounting. Pin 1 and Pin 5 are dedicated offset null terminals; Pin 8 is no-connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null 1 | Connects to one end of 100 Ω potentiometer wiper for manual input offset voltage trimming. |
| 2 | Inverting Input | Primary feedback node in inverting amplifier configurations; accepts signal referenced to ground or virtual ground. |
| 3 | Non-inverting Input | Reference input for follower, summing, or differential configurations; high-impedance JFET gate node. |
| 4 | VCC− | Negative supply rail connection; must be decoupled locally to minimize noise coupling into input stage. |
| 5 | Offset Null 2 | Connects to opposite end of same 100 Ω potentiometer used at Pin 1 for balanced null adjustment. |
| 6 | Output | Class AB push-pull output capable of ±10 V swing into 2 kΩ load; includes short-circuit protection. |
| 7 | VCC+ | Positive supply rail connection; supplies JFET input stage and output driver; requires local bypass capacitor. |
| 8 | N.C. | No internal connection; left unconnected per datasheet - not used for thermal relief or grounding. |
Key Features
| Feature | Design Value |
|---|---|
| High Input Impedance JFET Stage | 10¹² Ω input resistance enables direct interfacing with megohm-level sensor sources without signal attenuation. |
| Internal Frequency Compensation | Unity-gain stable design eliminates need for external compensation capacitors in most linear applications. |
| Output Short-Circuit Protection | Continuous safe short-circuit operation to either rail or ground prevents latch-up and thermal runaway. |
| Latch-Up Free Operation | Monolithic construction with isolated junctions avoids destructive parasitic SCR conduction under overvoltage stress. |
| Wide Common-Mode Range | ±11 V input common-mode range with ±15 V supply allows use in level-shifting and differential sensing circuits. |
Applications
| Audio Pre-amplifier | Active Bandpass Filter |
|---|---|
|
Use Scenario: Amplifying low-level microphone or phono cartridge signals before ADC sampling in consumer audio equipment. IC Role / Device Role / Timing Role: High-input-impedance, low-noise voltage amplifier with 0.01% THD at 1 kHz and 2 Vpp output. Use Value: Preserves signal integrity without requiring external biasing networks due to JFET input and wide common-mode range. |
Use Scenario: Implementing second-order bandpass response for tone detection in industrial monitoring systems. IC Role / Device Role / Timing Role: Precision op-amp in multiple-feedback topology with 2.5 MHz GBP supporting center frequencies up to 250 kHz. Use Value: Stable gain accuracy and low offset drift ensure consistent filter Q-factor across temperature and unit-to-unit variation. |
| DC Motor Speed Reference | Thermocouple Cold-Junction Compensation |
|
Use Scenario: Generating stable 0–5 V speed reference voltage from potentiometer wiper in brushed DC motor controllers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-impedance potentiometer from PWM-driven H-bridge control logic. Use Value: 10¹² Ω input resistance prevents loading-induced reference drift; ±11 V common-mode range accommodates ground-referenced potentiometers. |
Use Scenario: Compensating for cold-junction temperature drift in K-type thermocouple measurement circuits. IC Role / Device Role / Timing Role: Low-drift amplifier in precision instrumentation-grade cold-junction sensor interface with RTD or thermistor. Use Value: 10 µV/°C offset drift minimizes temperature-induced error in sub-0.1°C measurement systems over 0–70°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL071CP | Lower input bias current (30 pA typ vs. 20 nA), higher GBP (3 MHz), but no offset null pins. | Preferred where ultra-low bias current dominates over trimmable offset; unsuitable for precision nulling requirements. | Select TL071CP when offset voltage <1 mV is required without external trimming and layout space permits SOIC-8. |
| RC4558P | Bipolar input (higher Iib = 500 nA), lower slew rate (1.7 V/µs), no offset null, but wider temp range (-40°C to +85°C). | Used in cost-sensitive audio mixing consoles where precision DC performance is secondary to channel count and supply flexibility. | Choose RC4558P only for AC-coupled, non-precision applications where DIP8 footprint compatibility is critical and temperature range exceeds TL081ACN spec. |
Compared with TL081ACN, TL071CP offers superior DC precision but lacks offset adjustment capability, while RC4558P trades performance for cost and broader temperature coverage - making TL081ACN optimal for trimmed, stable DC-coupled designs in commercial temperature environments.
Availability
TL081ACN is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio pre-amplification stages, and active filter implementations requiring stable component supply and long-term DIP8 footprint compatibility.
Supply support for TL081ACN 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 analog, microcontroller, power, and MEMS products for industrial, automotive, and consumer markets.
The TL081 series belongs to ST's general-purpose operational amplifier product line, engineered for robustness, ease of use, and compatibility with legacy through-hole designs in cost-sensitive analog signal chains.
FAQ
Can TL081ACN operate from a single +12 V supply?
No - TL081ACN is specified for dual-supply operation only (±6 V to ±18 V). Its input common-mode and output swing ranges are asymmetric relative to ground and require both positive and negative rails. Single-supply use violates absolute maximum ratings and causes clipping or undefined behavior.
What is the purpose of Pins 1 and 5 on TL081ACN?
Pins 1 and 5 are offset null terminals used to connect an external 100 Ω potentiometer for trimming input offset voltage. Adjusting the wiper between these pins injects opposing currents into the input stage, reducing output DC error to <1 mV in precision DC applications.
Does TL081ACN have rail-to-rail input or output capability?
TL081ACN supports rail-to-rail input common-mode voltage (up to VCC+), but its output swing is limited to ±10 V into 2 kΩ with ±15 V supplies - approximately 2 V from each rail. It does not provide true rail-to-rail output and cannot drive loads near supply rails without headroom loss.
How does TL081ACN differ from TL081CN?
TL081ACN is the improved-grade version with tighter initial input offset voltage (3 mV max vs. 10 mV max for TL081CN) and lower offset drift (10 µV/°C vs. unspecified for CN). Both share identical pinout, package, and temperature range (0°C to +70°C), but A-grade offers enhanced DC precision for calibrated systems.
TL081ACN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 16V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 pA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-DIP
TL081ACN FAQ
1.How can I place an order for TL081ACN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081ACN 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 TL081ACN reliable?
The price and inventory of TL081ACN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081ACN is usually 5 days.
3.What payment methods are accepted for TL081ACN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081ACN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081ACN?
TL081ACN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081ACN 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 TL081ACN?
For technical support, including TL081ACN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081ACN requirements.
6.How does Aetrix verify that TL081ACN is sourced from the original manufacturer or authorized distributors?
All TL081ACN 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 TL081ACN meets industry standards.
7.What is the process for return or replacement of TL081ACN?
All TL081ACN units undergo pre-shipment inspection (PSI). If there is an issue with TL081ACN, 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 TL081ACN part is unused and in its original packaging.
Return procedure for TL081ACN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081ACN Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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