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STMicroelectronics TL081IDT
- Part No.:
- TL081IDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081IDT.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,291
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Product details
Overview
TL081IDT from STMicroelectronics is a JFET-input single operational amplifier optimized for high-speed, low-input-current analog signal conditioning in industrial and instrumentation systems. It delivers 16 V/µs typical slew rate, ±11 V input common-mode range (with ±15 V supply), 10¹² Ω input resistance, and 2.5–4 MHz gain-bandwidth product - enabling precision AC/DC amplification, active filtering, and oscillator circuits in rail-to-rail-limited designs.
For engineers reviewing the TL081IDT datasheet, TL081IDT pinout, TL081IDT application, or TL081IDT equivalent, key selection criteria include JFET-input bias current (≤200 pA typ), output short-circuit protection, internal frequency compensation, and SO-8 package compatibility with legacy DIP8 layouts via adapter boards.
Technical Context
The TL081IDT integrates matched high-voltage JFET and bipolar transistors on a monolithic die to achieve high slew rate and low input offset drift (10 µV/°C). Its fully differential input stage supports wide common-mode voltage swing up to the supply rails, and its internally compensated architecture ensures unity-gain stability without external components.
Designed for single-supply or split-supply operation (±3 V to ±18 V), it features latch-up-free behavior, 50–200 V/mV large-signal voltage gain, and robust ESD tolerance (1.5 kV CDM). The device operates across –40°C to +105°C, meeting industrial temperature requirements without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 16 V/µs typical - enables clean 10 Vpp signal amplification up to ~1 MHz without slew-induced distortion |
| Input Bias Current | 20 pA typical at +25°C - preserves signal integrity in high-impedance sensor interfaces (e.g., photodiode, piezoelectric) |
| Input Resistance | 10¹² Ω - minimizes loading error in passive filter and precision integrator circuits |
| Gain-Bandwidth Product | 2.5–4 MHz - supports stable closed-loop gain ≥10 at 200 kHz in unity-gain-compensated configuration |
| Input Offset Voltage | 3 mV max (TL081I grade) - reduces DC error in 12-bit ADC front-ends without trimming |
| Supply Voltage Range | ±3 V to ±18 V (6–36 V total) - compatible with standard ±5 V, ±12 V, and ±15 V analog rails |
| Common-Mode Range | ±11 V (with ±15 V supply) - allows direct interfacing to signals near supply rails in transducer conditioning |
Pinout & Package
TL081IDT is housed in an SO-8 surface-mount plastic micropackage (JEDEC MS-012AC), measuring 4.90 mm × 6.00 mm × 1.75 mm, with 1.27 mm lead pitch and gull-wing terminations suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null 1 | Connects to potentiometer wiper for manual input offset voltage trimming (used with Pin 5) |
| 2 | Inverting Input (–) | Differential input node for feedback networks; high-impedance JFET gate input |
| 3 | Non-inverting Input (+) | Differential input node referenced to ground or common-mode bias; same impedance as Pin 2 |
| 4 | VCC– | Negative supply rail connection; must be decoupled locally to minimize noise coupling |
| 5 | Offset Null 2 | Second terminal of offset null potentiometer; forms balanced bridge with Pin 1 for Vio adjustment |
| 6 | Output | Class-AB push-pull stage output capable of ±12 V swing into 2 kΩ load (±15 V supply) |
| 7 | VCC+ | Positive supply rail connection; supplies both input JFET stage and output bipolar stage |
| 8 | No Connect (N.C.) | Internally unconnected; must remain floating - no external tie or pull-up/pull-down |
Key Features
| Feature | Design Value |
|---|---|
| High Input Impedance JFET Stage | 10¹² Ω input resistance and ≤200 pA bias current enable direct connection to megohm-level source impedances without gain error |
| Internal Frequency Compensation | Unity-gain stable without external capacitors - simplifies PCB layout and eliminates risk of oscillation in basic inverting/non-inverting configurations |
| Output Short-Circuit Protection | Continuous safe short-circuit to either rail or ground under all operating conditions - prevents latch-up or thermal runaway during fault events |
| Latch-Up Free Operation | Monolithic CMOS-compatible process ensures immunity to parasitic SCR triggering - critical for mixed-signal systems with digital switching noise |
| Wide Common-Mode Range | ±11 V input common-mode voltage (with ±15 V supply) supports signal acquisition from sensors operating near power rails |
Applications
| Instrumentation Amplifier Front-End | Active Band-Pass Filter |
|---|---|
|
Use Scenario: Signal conditioning for thermocouple or strain gauge bridges with millivolt-level outputs and high source impedance. IC Role / Device Role / Timing Role: First-stage non-inverting amplifier providing gain and buffering before instrumentation amplifier input. Use Value: 10¹² Ω input resistance prevents bridge imbalance error; low offset drift (10 µV/°C) maintains calibration stability over temperature. |
Use Scenario: Audio-frequency band-pass filtering in test equipment requiring Q > 20 and minimal phase distortion. IC Role / Device Role / Timing Role: Dual-opamp topology (one as integrator, one as summer) implementing state-variable filter architecture. Use Value: 16 V/µs slew rate supports full-scale 10 Vpp output at 10 kHz without harmonic distortion; low THD (0.01%) preserves spectral purity. |
| 0.5 Hz Precision Oscillator | High-Voltage Photodiode Transimpedance Amplifier |
|
Use Scenario: Low-frequency square wave generation for timing reference in data loggers and slow-scan oscilloscopes. IC Role / Device Role / Timing Role: Schmitt-trigger configured with RC network to define precise oscillation period (f = 1/(2·RF·C)). Use Value: Guaranteed latch-up-free operation ensures reliable startup and sustained oscillation; wide supply range (±3 V to ±18 V) enables battery-powered use. |
Use Scenario: Converting nanoampere photocurrent from UV/IR detectors into measurable voltage with minimal dark current error. IC Role / Device Role / Timing Role: Transimpedance amplifier with feedback resistor ≥100 MΩ and guarded input trace routing. Use Value: 20 pA typical input bias current limits dark current contribution to <0.2% error at 10 nA signal; JFET input avoids gate leakage artifacts. |
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 |
|---|---|---|---|
| TL071CDR | Lower input bias current (10 pA typ), but narrower common-mode range (±10 V) and no offset null pins | Preferred for ultra-low-current applications where offset trim is unnecessary and rail margin is sufficient | Select when lowest possible Iib is critical and offset adjustment is handled digitally or externally |
| OPA134UA | Higher slew rate (20 V/µs), lower noise (8 nV/√Hz), but higher supply current (4 mA) and no SO-8 automotive-grade variant | Better suited for audio preamps and high-fidelity signal chains where noise and speed outweigh power constraints | Choose for premium audio or low-noise measurement where cost and quiescent current are secondary |
Compared with TL071CDR and OPA134UA, TL081IDT uniquely combines offset null capability, industrial temperature rating, SO-8 packaging, and proven reliability in long-lifecycle industrial control systems - making it optimal for cost-sensitive, field-deployed analog signal paths requiring manual calibration and robustness.
Availability
TL081IDT is available at Aetrix Electronics and suitable for industrial sensor interfaces, test equipment front-ends, and programmable logic controller (PLC) analog I/O modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TL081IDT 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.
TL081IDT belongs to ST's general-purpose JFET-input op-amp product line, engineered for robust performance in harsh environments - emphasizing wide supply range, latch-up immunity, and long-term parametric stability in factory automation and instrumentation.
FAQ
Can TL081IDT operate from a single 12 V supply?
Yes. TL081IDT supports single-supply operation from 6 V to 36 V total supply voltage. With 12 V between VCC+ and VCC–, the input common-mode range extends from –0.3 V to +10.7 V (per datasheet Table 2), and output swing reaches ±5 V into 10 kΩ. Decoupling capacitors and proper input biasing (e.g., mid-rail reference) are required for DC-coupled use.
What is the purpose of Pins 1 and 5 (Offset Null)?
Pins 1 and 5 form a differential offset null interface. A 10 kΩ potentiometer is connected with its ends to VCC+ and VCC–, and its wiper to Pin 1; Pin 5 connects to the opposite end of the potentiometer. Adjusting the wiper trims input offset voltage to ≤1 mV, critical for DC-coupled integrators and precision summing amplifiers where cumulative error must be minimized.
Does TL081IDT require external compensation?
No. TL081IDT is internally frequency-compensated for unity-gain stability. No external capacitor is needed for stable operation in inverting, non-inverting, or voltage-follower configurations. This eliminates layout sensitivity and ensures consistent phase margin (>45°) across temperature and supply variations, as verified in Figure 11 of the datasheet.
How does TL081IDT compare to TL082 in dual configuration?
TL081IDT contains one op-amp per SO-8 package; TL082IDT integrates two identical amplifiers in the same footprint. Both share identical electrical specs (slew rate, input bias, GBW), but TL081IDT offers dedicated pinout for single-channel optimization - including isolated offset null and simplified thermal management. Use TL081IDT when only one amplifier is needed or when channel isolation is critical.
TL081IDT 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:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL081IDT FAQ
1.How can I place an order for TL081IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081IDT 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 TL081IDT reliable?
The price and inventory of TL081IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081IDT is usually 5 days.
3.What payment methods are accepted for TL081IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081IDT?
TL081IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081IDT 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 TL081IDT?
For technical support, including TL081IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081IDT requirements.
6.How does Aetrix verify that TL081IDT is sourced from the original manufacturer or authorized distributors?
All TL081IDT 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 TL081IDT meets industry standards.
7.What is the process for return or replacement of TL081IDT?
All TL081IDT units undergo pre-shipment inspection (PSI). If there is an issue with TL081IDT, 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 TL081IDT part is unused and in its original packaging.
Return procedure for TL081IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081IDT Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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