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onsemi TL081ACD
- Part No.:
- TL081ACD
- Manufacturer:
- onsemi
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081ACD.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,225
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Product details
Overview
TL081ACD from STMicroelectronics is a high-speed JFET-input single operational amplifier with 16 V/µs typical slew rate, ±15 V input voltage range, and 2.5–4 MHz gain-bandwidth product. It delivers low input bias current (20 nA typ), 3 mV max input offset voltage (TL081A grade), and operates from ±6 V to ±18 V supplies. Used in precision signal conditioning, active filters, and oscillator circuits across industrial test equipment.
For engineers reviewing the TL081ACD datasheet, TL081ACD pinout, TL081ACD application, or TL081ACD equivalent, key selection criteria include input offset drift (10 µV/°C), common-mode rejection (70–86 dB), output short-circuit protection, and SO-8 package thermal resistance (125 °C/W junction-to-ambient).
Technical Context
The TL081ACD integrates matched high-voltage JFET and bipolar transistors on a monolithic die, enabling high input impedance (>10¹² Ω) and latch-up-free operation. Its internal frequency compensation ensures unity-gain stability while supporting wide common-mode input range (±11 V to +15 V).
Designed for general-purpose analog signal processing, it features dual offset-null pins (1 and 5) for external trimming, rail-to-rail-compatible output swing (±10 V into 2 kΩ), and robust ESD protection (500 V HBM, 1.5 kV CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 16 V/µs typical - enables clean amplification of fast-rising signals up to ~1 MHz without distortion |
| Input Offset Voltage | 3 mV max (TL081A grade) - supports DC-coupled precision gain stages with ≤0.3% initial error at unity gain |
| Gain-Bandwidth Product | 2.5–4 MHz - sets usable small-signal bandwidth limit for closed-loop gains ≥10 |
| Input Bias Current | 20 nA typical - minimizes voltage error across high-impedance sensor interfaces (e.g., photodiode transimpedance) |
| Common-Mode Rejection | 70–86 dB - rejects noise coupled equally to both inputs in noisy industrial environments |
| Supply Voltage Range | ±6 V to ±18 V - supports dual-rail operation in legacy ±12 V and ±15 V systems |
| Output Short-Circuit Duration | Infinite - allows safe continuous fault operation without latch-up or degradation |
Pinout & Package
TL081ACD is housed in an SO-8 plastic micropackage (JEDEC MS-012AA), with 1.27 mm lead pitch, 4.8–5.0 mm body width, and 125 °C/W thermal resistance junction-to-ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null 1 | Connects to one end of external 100 Ω potentiometer for manual input offset voltage trimming |
| 2 | Inverting Input | Inverts and amplifies differential voltage relative to non-inverting input; high-impedance JFET node |
| 3 | Non-inverting Input | Reference input for positive feedback configurations; identical JFET impedance to Pin 2 |
| 4 | VCC− | Negative supply rail connection; must be decoupled locally to minimize noise coupling |
| 5 | Offset Null 2 | Connects to opposite end of same potentiometer as Pin 1 to balance input stage quiescent currents |
| 6 | Output | Class-AB push-pull stage capable of ±10 V swing into 2 kΩ; includes short-circuit protection |
| 7 | VCC+ | Positive supply rail connection; shares same decoupling best practices as Pin 4 |
| 8 | No Connect | Internally unused; must remain unconnected to avoid parasitic coupling or ESD path disruption |
Key Features
| Feature | Design Value |
|---|---|
| High Input Impedance JFET Stage | ≥10¹² Ω input resistance enables direct interfacing with high-Z sensors without loading |
| Internal Frequency Compensation | Guarantees stable unity-gain operation without external compensation components |
| Output Short-Circuit Protection | Allows indefinite output shorting to either rail or ground without device damage or parameter shift |
| Latch-Up Free Operation | Monolithic construction prevents destructive parasitic SCR conduction under overvoltage stress |
| Wide Common-Mode Range | Accepts inputs up to VCC+ (e.g., +15 V) and down to VCC− −12 V, supporting rail-referenced signal routing |
Applications
| Active Bandpass Filter | DC-Coupled Instrumentation Amplifier |
|---|---|
Use Scenario: 1 kHz–10 kHz bandpass filter for audio preamplifier front-end with Q > 20. IC Role / Device Role / Timing Role: Configured as high-Q twin-T or state-variable topology; provides gain, phase control, and low-noise buffering. Use Value: 15 nV/√Hz input noise and 0.01% THD ensure minimal signal degradation across audible spectrum. | Use Scenario: Precision DC-coupled gain stage for strain gauge bridge outputs in load cell interfaces. IC Role / Device Role / Timing Role: First-stage amplifier with adjustable offset nulling to eliminate bridge imbalance error before instrumentation amp input. Use Value: 3 mV max offset and 10 µV/°C drift enable <10 µV total error over 0–70°C operating range. |
| 0.5 Hz Square Wave Oscillator | High-Voltage Signal Inverter |
Use Scenario: Low-frequency timing reference for energy meter calibration pulses or slow process control logic. IC Role / Device Role / Timing Role: Schmitt-trigger configured with RC network to generate precise 2-second period square wave. Use Value: Rail-to-rail compatible output swing and infinite short-circuit duration allow direct drive of CMOS logic inputs. | Use Scenario: Polarity inversion stage in ±12 V analog signal routing for motor control feedback loops. IC Role / Device Role / Timing Role: Unity-gain inverter with matched resistors; handles ±10 V signals with <0.1% gain error. Use Value: ±18 V absolute max supply rating and ±15 V input range support full-scale operation within ±12 V system rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL071CD | Lower input noise (18 nV/√Hz vs. 15 nV/√Hz), higher GBP (3 MHz vs. 2.5–4 MHz), no offset null pins | Preferred where ultra-low noise dominates over trimmable offset; unsuitable for precision DC offset correction | Select TL071CD only when offset nulling is unnecessary and noise floor is critical |
| OPA134UA | Higher slew rate (20 V/µs), lower THD (0.00008%), wider supply range (±2.5 V to ±18 V), no offset null pins | Better for high-fidelity audio; lacks external trimming capability required for sensor zeroing | Choose OPA134UA for audio-grade performance but avoid where factory or field offset calibration is needed |
Compared with TL081ACD, TL071CD trades offset adjustability for slightly better noise, while OPA134UA offers superior dynamic performance but removes trimming-making TL081ACD uniquely suited for cost-sensitive, trimmable precision DC applications.
Availability
TL081ACD is available at Aetrix Electronics and suitable for industrial test instrumentation, analog sensor signal conditioning, and legacy ±15 V power supply designs requiring stable component supply and long-term obsolescence management.
Supply support for TL081ACD 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 sensor solutions for industrial, automotive, and consumer markets.
The TL081 series belongs to ST's general-purpose JFET-input op-amp product line, engineered for reliable performance in cost-sensitive industrial signal conditioning, active filtering, and waveform generation applications.
FAQ
What is the maximum operating temperature range for TL081ACD?
The TL081ACD is rated for 0°C to +70°C free-air operating temperature. This commercial-grade specification aligns with its SO-8 packaging and DIP8 equivalents marked "C" or "CD". It is not qualified for extended industrial (−40°C to +105°C) or automotive temperature ranges.
Does TL081ACD require external compensation capacitors?
No, TL081ACD includes internal frequency compensation optimized for unity-gain stability. External compensation is neither required nor recommended unless implementing specialized high-Q filter topologies where controlled phase margin adjustment is needed-verified per Figure 11 in the datasheet.
Can TL081ACD drive capacitive loads directly?
TL081ACD can safely drive ≤100 pF capacitive loads in unity-gain configuration, as characterized in slew rate and overshoot tests. For larger loads (e.g., >200 pF), isolation resistors (100–470 Ω) between output and capacitance are required to prevent instability and ringing per Figure 19 pulse response data.
How is the offset null function implemented on TL081ACD?
Offset null uses Pins 1 and 5 to connect a 10 kΩ potentiometer's outer terminals, with wiper grounded. Adjusting the potentiometer balances input stage JFET currents, reducing input offset voltage to ≤1 mV. This method is effective only at DC and low frequencies; it does not correct drift or AC errors.
TL081ACD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL081ACD FAQ
1.How can I place an order for TL081ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081ACD 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 TL081ACD reliable?
The price and inventory of TL081ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081ACD is usually 5 days.
3.What payment methods are accepted for TL081ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081ACD?
TL081ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081ACD 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 TL081ACD?
For technical support, including TL081ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081ACD requirements.
6.How does Aetrix verify that TL081ACD is sourced from the original manufacturer or authorized distributors?
All TL081ACD 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 TL081ACD meets industry standards.
7.What is the process for return or replacement of TL081ACD?
All TL081ACD units undergo pre-shipment inspection (PSI). If there is an issue with TL081ACD, 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 TL081ACD part is unused and in its original packaging.
Return procedure for TL081ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081ACD Tags
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LM358DT
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