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STMicroelectronics TL081CDT
- Part No.:
- TL081CDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081CDT.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:19,300
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Product details
Overview
TL081CDT from STMicroelectronics is a general-purpose JFET-input single operational amplifier in SO-8 package, featuring 16 V/µs typical slew rate, ±15 V input voltage range, and 2.5–4 MHz gain-bandwidth product. It delivers high input impedance (>10¹² Ω), low input bias current (20 nA typ), and output short-circuit protection for precision analog signal conditioning in industrial instrumentation.
For engineers reviewing the TL081CDT datasheet, TL081CDT pinout, TL081CDT application, or TL081CDT equivalent, key selection criteria include input offset voltage drift (10 µV/°C), common-mode rejection ratio (70–86 dB), supply voltage rejection (70–86 dB), and thermal resistance (125 °C/W junction-to-ambient in SO-8).
Technical Context
The TL081CDT uses a monolithic JFET-bipolar hybrid process to achieve high slew rate and low input currents while maintaining internal frequency compensation for unity-gain stability. Its input stage employs matched high-voltage JFETs with bipolar output transistors, enabling rail-to-rail common-mode input range up to ±11 V with ±15 V supplies.
It supports dual-supply operation from ±3 V to ±18 V (6–36 V total), operates across 0°C to +70°C, and includes latch-up free design with ESD protection (500 V HBM, 200 V MM, 1.5 kV CDM). The device lacks rail-to-rail output swing but delivers ±12 V into 10 kΩ at ±15 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 16 V/µs typical - enables stable amplification of fast-changing signals up to ~1 MHz without distortion |
| Gain-Bandwidth Product | 2.5–4 MHz - defines usable closed-loop bandwidth at given gain (e.g., 400 kHz at Av = 10) |
| Input Offset Voltage | 3–13 mV max - sets minimum resolvable DC signal error in precision DC-coupled stages |
| Input Bias Current | 20 nA typical - minimizes voltage error across high-impedance sensor sources (e.g., photodiodes, piezoelectrics) |
| Common-Mode Rejection | 70–86 dB - rejects noise coupled equally to both inputs, critical in noisy industrial environments |
| Supply Voltage Range | ±3 V to ±18 V (6–36 V total) - supports wide-range dual-rail systems including legacy ±12 V and modern ±15 V designs |
| Output Short-Circuit Duration | Infinite - allows continuous safe operation even if output is inadvertently shorted to ground or supply rails |
Pinout & Package
TL081CDT is supplied in an SO-8 (Small Outline Integrated Circuit, 8-pin) 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 external potentiometer wiper for manual input offset voltage trimming |
| 2 | Inverting Input | Primary negative feedback node; accepts inverted-phase signal or feedback network |
| 3 | Non-inverting Input | Positive input terminal; used for reference voltage injection or non-inverting configuration |
| 4 | VCC− | Negative supply rail connection; must be decoupled locally to minimize noise coupling |
| 5 | Offset Null 2 | Second terminal of external trim-pot; completes nulling circuit with Pin 1 |
| 6 | Output | Amplified single-ended output; capable of ±12 V swing into 10 kΩ load at ±15 V supplies |
| 7 | VCC+ | Positive supply rail connection; requires local 100 nF ceramic decoupling capacitor |
| 8 | No Connect | Internally unconnected; must remain floating-no external tie or pull-up/down |
Key Features
| Feature | Design Value |
|---|---|
| High Input Impedance JFET Stage | >10¹² Ω input resistance enables minimal loading of high-Z sensors and passive filters |
| Internal Frequency Compensation | Unity-gain stable without external compensation components-reduces BOM count and layout complexity |
| Output Short-Circuit Protection | Allows indefinite short-circuit to either rail or ground without damage-enhances system robustness |
| Latch-Up Free Operation | Immune to parasitic SCR triggering under overvoltage or ESD stress-improves reliability in harsh environments |
| Wide Common-Mode Input Range | ±11 V with ±15 V supplies-supports direct interfacing to signals near supply rails without level-shifting |
Applications
| Industrial Sensor Signal Conditioning | Audio Pre-Amplification |
|---|---|
Use Scenario: Amplifying low-level mV outputs from RTDs, thermocouples, or strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: Single-ended DC-coupled amplifier with adjustable offset nulling to reject sensor self-heating drift. Use Value: 10 µV/°C offset drift and 20 nA bias current minimize temperature-induced measurement error in 0–100°C industrial ranges. | Use Scenario: Low-noise pre-amplifier stage for dynamic microphone signals before ADC sampling in audio recording interfaces. IC Role / Device Role / Timing Role: Inverting gain-of-10 amplifier with 15 nV/√Hz input noise and <0.01% THD at 1 kHz. Use Value: 16 V/µs slew rate preserves transient fidelity of percussive audio transients without slew-induced distortion. |
| Function Generator Waveform Shaping | Active Filter Building Block |
Use Scenario: Square wave oscillator and integrator core in benchtop function generators producing 0.5 Hz–100 kHz waveforms. IC Role / Device Role / Timing Role: High-slew comparator/integrator pair generating precise triangle and sine approximations via passive filtering. Use Value: 4 MHz GBP and 16 V/µs slew rate support clean integration of 100 kHz square waves into linear triangle outputs. | Use Scenario: High-Q notch filter for 50/60 Hz mains interference rejection in ECG front-ends and precision data acquisition. IC Role / Device Role / Timing Role: Dual-opamp topology implementing twin-T or state-variable architecture with precise pole-zero placement. Use Value: 86 dB CMRR and low 10 µV/°C drift maintain notch depth stability across ambient temperature shifts in medical-grade devices. |
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 |
|---|---|---|---|
| TL071CDT | Lower input noise (18 nV/√Hz vs. 15 nV/√Hz), same pinout and GBW, but higher Vio drift (18 µV/°C) | Better for low-noise AC-coupled audio; less suitable for DC-stable sensor amps requiring low drift | Choose TL071CDT when noise dominates over drift; retain TL081CDT for cost-sensitive DC precision tasks |
| RC4558DT | Bipolar input (higher Iib = 500 nA), lower slew rate (1.7 V/µs), wider temp range (−40°C to +85°C), same SO-8 | Acceptable for general-purpose AC amplification where input Z and speed are non-critical | Use RC4558DT only in legacy designs or cost-driven consumer audio; avoid in high-Z sensor paths |
Compared with TL071CDT and RC4558DT, TL081CDT uniquely balances low input bias current, moderate noise, and proven industrial temperature stability-making it optimal for cost-constrained, medium-precision analog signal chains where JFET input integrity matters more than ultra-low noise.
Availability
TL081CDT is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio pre-amplifiers, function generator circuits, and active filter designs requiring stable component supply across extended production lifecycles.
Supply support for TL081CDT 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 microcontrollers, power ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.
The TL081 series belongs to ST's general-purpose analog op-amp product line, engineered for reliable performance in cost-sensitive industrial instrumentation and legacy analog signal processing where JFET input characteristics outweigh ultra-modern specs.
FAQ
What is the maximum supply voltage for TL081CDT?
The absolute maximum supply voltage is ±18 V (36 V total), but recommended operating range is ±3 V to ±18 V. Exceeding ±18 V risks permanent damage due to junction breakdown. For long-term reliability at elevated temperatures, ST specifies derated operation above ±15 V-consult Table 1 in the datasheet for thermal limits at specific VCC and Tamb combinations.
Does TL081CDT require external compensation capacitors?
No-TL081CDT features internal frequency compensation optimized for unity-gain stability. Adding external compensation is unnecessary and may degrade phase margin or bandwidth. External capacitors should only be used for intentional filtering (e.g., input RFI suppression or output snubbing), not for stability control.
Can TL081CDT drive capacitive loads directly?
TL081CDT can safely drive ≤100 pF capacitive loads in unity-gain configuration per Figure 19 pulse response data. For larger loads (e.g., >200 pF), isolation resistors (≥100 Ω) or gain ≥10 are required to prevent peaking or oscillation. Output phase margin is 45°, so capacitive loading degrades stability rapidly without proper compensation.
Is Pin 8 (NC) allowed to be grounded or tied to supply?
No-Pin 8 is internally unconnected and must remain electrically floating. Grounding, pulling to VCC+, or connecting to any other node may cause unpredictable behavior or increased leakage current. ST's mechanical drawings and schematic diagrams explicitly define it as "N.C." with no internal bond wire; violating this violates the device's qualified SO-8 layout and thermal model.
TL081CDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
TL081CDT FAQ
1.How can I place an order for TL081CDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081CDT 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 TL081CDT reliable?
The price and inventory of TL081CDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081CDT is usually 5 days.
3.What payment methods are accepted for TL081CDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081CDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081CDT?
TL081CDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081CDT 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 TL081CDT?
For technical support, including TL081CDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081CDT requirements.
6.How does Aetrix verify that TL081CDT is sourced from the original manufacturer or authorized distributors?
All TL081CDT 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 TL081CDT meets industry standards.
7.What is the process for return or replacement of TL081CDT?
All TL081CDT units undergo pre-shipment inspection (PSI). If there is an issue with TL081CDT, 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 TL081CDT part is unused and in its original packaging.
Return procedure for TL081CDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081CDT Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
Texas Instruments
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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