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Texas Instruments TL081CD
- Part No.:
- TL081CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081CD.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,195
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Product details
Overview
TL081CD from STMicroelectronics is a general-purpose JFET-input single operational amplifier featuring high input impedance (10¹² Ω), low input bias current (20 nA typ), and high slew rate (16 V/µs typ) for precision AC/DC signal conditioning in industrial instrumentation and sensor interfaces. It operates from ±6 V to ±18 V supply, delivers ±12 V output swing into 2 kΩ, and includes internal frequency compensation and output short-circuit protection.
For engineers reviewing the TL081CD datasheet, TL081CD pinout, TL081CD application, or TL081CD equivalent, key selection criteria include input offset voltage drift (10 µV/°C), common-mode rejection ratio (70–86 dB), gain-bandwidth product (2.5–4 MHz), and SO-8 package thermal resistance (125 °C/W junction-to-ambient).
Technical Context
The TL081CD uses a monolithic JFET-bipolar hybrid process to achieve high-voltage input stage performance with latch-up-free operation and rail-to-rail common-mode range up to VCC±. Its internal frequency compensation ensures unity-gain stability without external components.
It supports dual-supply operation only (±6 V to ±18 V), exhibits differential input voltage tolerance of ±30 V, and maintains 45° phase margin at unity gain-critical for stable closed-loop configurations in active filters and precision amplifiers.
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 follower configuration |
| Input Bias Current | 20 nA typical at +25°C - minimizes DC error in high-impedance sensor front-ends (e.g., photodiode transimpedance amps) |
| Input Offset Voltage | 3 mV max (TL081C grade) - sets baseline DC accuracy limit in non-inverting amplifier designs with gain ≥10 |
| Gain-Bandwidth Product | 2.5 MHz min - defines maximum stable closed-loop bandwidth for gain-of-10 configurations (~250 kHz) |
| Common-Mode Rejection Ratio | 70 dB min - suppresses noise coupled equally to both inputs in single-ended measurement systems |
| Supply Voltage Range | ±6 V to ±18 V - supports standard dual-rail industrial power supplies while limiting dissipation in DIP8/SO-8 packages |
| Output Short-Circuit Duration | Infinite - permits safe continuous short-circuit operation without latch-up or permanent damage |
Pinout & Package
TL081CD is supplied in an 8-pin SO-8 (small-outline integrated circuit) plastic micropackage with gull-wing leads, compliant with JEDEC MS-012 and RoHS/ECOPACK® requirements. Thermal resistance is 125 °C/W (junction-to-ambient) and 40 °C/W (junction-to-case).
| 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 (−) | Primary feedback node in inverting amplifier configurations; high-impedance JFET gate input |
| 3 | Non-inverting Input (+) | Reference input for follower or non-inverting gain stages; matched to Pin 2 for CMRR optimization |
| 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 with Pin 1 for balanced null adjustment |
| 6 | Output | Class-AB push-pull output stage capable of ±12 V swing into 2 kΩ load with <10% overshoot |
| 7 | VCC+ | Positive supply rail connection; referenced to Pin 4 as zero potential midpoint in dual-supply systems |
| 8 | No Connect (N.C.) | Internally unconnected; must remain floating-no external tie or pull-up/pull-down permitted |
Key Features
| Feature | Design Value |
|---|---|
| High Input Impedance JFET Stage | 10¹² Ω input resistance enables minimal loading of high-Z sources like piezoelectric sensors or RC filter networks |
| Internal Frequency Compensation | Guarantees stable unity-gain operation without external compensation capacitors across all operating conditions |
| Output Short-Circuit Protection | Allows indefinite output shorting to either rail or ground without device failure or parameter shift |
| Latch-Up Free Operation | Monolithic JFET-bipolar process eliminates parasitic SCR triggering under overvoltage or ESD stress |
| Wide Common-Mode Range | ±11 V minimum common-mode input range supports operation near supply rails in single-supply derived systems |
Applications
| Industrial Sensor Signal Conditioning | Active Filter Design |
|---|---|
|
Use Scenario: Amplifying low-level thermocouple or strain gauge outputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision DC-coupled non-inverting amplifier with gain ≥100, rejecting common-mode noise from 50/60 Hz mains pickup. Use Value: Low input bias current (20 nA) prevents significant voltage drop across high-resistance sensor bridges; 10 µV/°C offset drift ensures <1 LSB error over 0–70°C industrial temperature range. |
Use Scenario: Implementing 2nd-order high-Q notch filters to suppress 50 Hz interference in medical ECG front-ends. IC Role / Device Role / Timing Role: Dual-opamp topology (one TL081 per section) configured as twin-T or state-variable filter with precise pole placement. Use Value: 4 MHz gain-bandwidth product supports accurate Q > 20 at 50 Hz; low THD (0.01%) preserves waveform fidelity of microvolt-level cardiac signals. |
| Function Generator Waveform Shaping | DC Power Supply Error Amplifier |
|
Use Scenario: Square-wave oscillator and integrator stages in benchtop function generators producing 0.5 Hz–100 kHz waveforms. IC Role / Device Role / Timing Role: Comparator + integrator pair generating linear ramp outputs; slew rate (16 V/µs) limits max frequency before distortion. Use Value: Fast slew rate enables clean 10 Vpp triangle waves up to ~15 kHz; internal compensation avoids instability during rapid transitions. |
Use Scenario: Voltage error amplifier in isolated DC-DC converter feedback loops regulating ±15 V outputs for analog circuitry. IC Role / Device Role / Timing Role: Compensated transconductance amplifier comparing sensed output against reference, driving optocoupler LED. Use Value: High CMRR (86 dB typ) rejects switching noise on feedback trace; ±12 V output swing ensures full optocoupler LED drive range across line/load variations. |
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 |
|---|---|---|---|
| TL071CP | Lower input noise (18 nV/√Hz vs. 15 nV/√Hz), identical pinout and specs except 0.002% lower THD | Preferred in audio preamps where noise floor dominates; less common in industrial control due to tighter temp spec | Select TL071CP when THD <0.002% required at 1 kHz; verify layout grounding matches lower-noise sensitivity |
| LF351N | Same JFET input architecture but higher input offset voltage (10 mV max) and slower slew rate (12 V/µs) | Used in cost-sensitive educational kits and legacy test equipment where speed and precision are secondary | Choose LF351N only if budget constraints outweigh need for 16 V/µs slew rate and 3 mV Vio guarantee |
Compared with TL081CD, TL071CP offers marginally better noise and THD for signal integrity-critical roles, while LF351N trades performance for legacy compatibility and lower unit cost-neither is pin-compatible with automotive-grade TL081IYD variants.
Availability
TL081CD is available at Aetrix Electronics and suitable for industrial sensor interfaces, active filter design, function generator circuits, and DC power supply error amplification requiring stable component supply across commercial temperature range (0°C to +70°C).
Supply support for TL081CD 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 JFET-input op-amp product line, engineered for robustness and consistency in cost-sensitive industrial instrumentation and signal conditioning applications where reliability across temperature and supply variation is essential.
FAQ
Is TL081CD compatible with single-supply operation?
No. TL081CD requires dual symmetric supplies (e.g., ±12 V or ±15 V) and does not support rail-to-rail input or output. Its input common-mode range extends only to ±11 V with ±15 V supplies, and output cannot swing within 2 V of either rail. Single-supply use requires level-shifting circuitry or alternative op-amps like TS912.
What is the purpose of Pins 1 and 5 (Offset Null)?
Pins 1 and 5 connect to opposite ends of a 100 Ω potentiometer whose wiper goes to VCC−. Adjusting this potentiometer balances internal input transistor mismatches to reduce input offset voltage to ≤1 mV. This trim is critical in DC-coupled precision amplifiers where offset directly impacts accuracy.
Does TL081CD have ESD protection, and what are its ratings?
Yes. TL081CD features on-chip ESD protection rated at 500 V (HBM), 200 V (MM), and 1.5 kV (CDM), per JEDEC standards. These values reflect tested immunity during handling and PCB assembly-not system-level surge protection. External TVS diodes are still recommended for I/O lines exposed to connectors.
Can TL081CD drive capacitive loads directly?
TL081CD is not optimized for direct capacitive loading. Driving >100 pF without isolation resistance risks instability due to phase shift from load capacitance interacting with open-loop gain roll-off. For loads >100 pF, add a 10–100 Ω series resistor between output and capacitor, or use a dedicated buffer stage.
TL081CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 13V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL081CD FAQ
1.How can I place an order for TL081CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081CD 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 TL081CD reliable?
The price and inventory of TL081CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081CD is usually 5 days.
3.What payment methods are accepted for TL081CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081CD?
TL081CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081CD 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 TL081CD?
For technical support, including TL081CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081CD requirements.
6.How does Aetrix verify that TL081CD is sourced from the original manufacturer or authorized distributors?
All TL081CD 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 TL081CD meets industry standards.
7.What is the process for return or replacement of TL081CD?
All TL081CD units undergo pre-shipment inspection (PSI). If there is an issue with TL081CD, 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 TL081CD part is unused and in its original packaging.
Return procedure for TL081CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081CD Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
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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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