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Texas Instruments TL081IDR
- Part No.:
- TL081IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081IDR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,355
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Product details
Overview
TL081IDR from Texas Instruments is a single-channel JFET-input operational amplifier designed for precision analog signal conditioning in industrial and audio systems. It delivers 20 V/μs slew rate, ±1 mV typical input offset voltage, 5.25 MHz gain-bandwidth product, 125 dB open-loop gain, and operates from ±2.25 V to ±20 V supplies. It serves as a high-speed, low-noise gain stage in pro audio mixers and battery test equipment.
For engineers reviewing the TL081IDR datasheet, TL081IDR pinout, TL081IDR application, or TL081IDR equivalent, this page provides verified electrical specifications, SOIC-8 package terminal mapping, real-world use cases in solar inverters and motor drives, and two validated alternative op-amps with documented functional and thermal differences.
Technical Context
The TL081IDR uses a dual-JFET input stage enabling ultra-low input bias current (±1 pA typ) and rail-to-rail common-mode input range extending to VCC+. Its internal compensation ensures stable unity-gain operation with ≤300 pF capacitive load drive capability.
It features integrated EMI/RF filters and 1.5 kV HBM ESD protection, supporting operation across –40°C to +125°C. The device maintains 95 dB CMRR and 100 dB PSRR over full temperature range, critical for noise-sensitive measurement front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 20 V/μs - enables accurate reproduction of fast transients in audio and control loops without distortion |
| Input Offset Voltage | ±1 mV (typ) - supports DC-coupled precision amplification with ≤10 μV/°C drift |
| Gain-Bandwidth Product | 5.25 MHz - allows stable closed-loop gain ≥10 at 500 kHz for anti-aliasing filter design |
| Input Bias Current | ±1 pA (typ) - minimizes voltage error in high-impedance sensor interfaces (e.g., photodiode amps) |
| Supply Voltage Range | ±2.25 V to ±20 V - supports dual-supply operation in legacy industrial rails and modern low-voltage systems |
| Common-Mode Input Range | Extends to VCC+ - permits direct sensing of signals referenced to positive rail (e.g., high-side current sense) |
| Output Short-Circuit Protection | Integrated - prevents latch-up or damage during fault conditions in motor drive feedback paths |
Pinout & Package
TL081IDR is supplied in an 8-pin SOIC (D) package with standard industry footprint and 1.27 mm pitch. Thermal resistance RθJA = 158.8°C/W enables reliable operation at ambient temperatures up to +125°C with minimal heatsinking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - must remain unconnected per datasheet; floating pin has no internal connection |
| 2 | IN– | Inverting input - accepts feedback network for stable closed-loop configurations (e.g., inverting amplifier) |
| 3 | IN+ | Non-inverting input - used for unity-gain buffers or high-impedance signal routing without loading source |
| 4 | VCC– | Negative supply rail - requires low-impedance decoupling (e.g., 100 nF ceramic) within 5 mm of pin |
| 5 | NC | No connect - electrically isolated; PCB trace must be omitted or terminated in keep-out zone |
| 6 | OUT | Amplifier output - capable of sourcing/sinking ±26 mA; drives 2 kΩ loads with ≤215 mV headroom to rails |
| 7 | VCC+ | Positive supply rail - accepts bypass capacitor to suppress supply noise coupling into high-gain stages |
| 8 | NC | No connect - unused terminal; no internal bond wire or circuit connection |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input | Accepts inputs up to VCC+, enabling direct interface with sensors operating near positive supply |
| Low input voltage noise | 37 nV/√Hz at 1 kHz - preserves SNR in microphone preamps and precision instrumentation amplifiers |
| EMI rejection ratio | 53 dB at 1 GHz - suppresses RF interference in noisy industrial environments (e.g., VFD proximity) |
| Output short-circuit protection | Withstands indefinite short to ground - eliminates need for external current-limiting resistors in servo loop outputs |
| Wide temperature range | Specified from –40°C to +125°C - qualified for under-hood automotive and outdoor solar inverter applications |
Applications
| Solar Energy Inverters | Pro Audio Mixers |
|---|---|
Use Scenario: Signal conditioning of DC-link voltage feedback in string-level MPPT controllers. IC Role / Device Role / Timing Role: Precision difference amplifier converting high-voltage differential sense to ground-referenced signal for ADC input. Use Value: ±1 mV offset ensures <0.01% measurement error across 0–1000 V range; 20 V/μs slew handles fast transients during partial shading events. |
Use Scenario: Low-noise microphone preamplifier stage with adjustable gain before analog-to-digital conversion. IC Role / Device Role / Timing Role: High-input-impedance, low-distortion gain block preserving wide dynamic range and harmonic integrity. Use Value: 37 nV/√Hz input noise and 0.00012% THD+N maintain professional-grade audio fidelity; JFET input avoids loading electret capsule impedance. |
| Battery Test Equipment | Motor Drive Control |
Use Scenario: Precision current sensing during charge/discharge cycling of Li-ion cells using shunt resistors. IC Role / Device Role / Timing Role: High-common-mode rejection amplifier measuring mV-level shunt voltage against noisy 48 V bus. Use Value: 105 dB CMRR rejects common-mode noise from switching regulators; ±1 pA bias current prevents error in high-resistance gain networks. |
Use Scenario: Isolated gate driver bias supply monitoring and overcurrent detection in AC servo inverters. IC Role / Device Role / Timing Role: Fast comparator input buffer and fault-signal conditioner feeding microcontroller ADC or digital isolator. Use Value: 0.48 μs settling time to 0.01% enables real-time current limiting at 20 kHz PWM frequencies; output short-circuit protection survives IGBT shoot-through faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL081CDR | Wider offset voltage (±3 mV max vs ±1 mV), lower ESD rating (1 kV HBM), rated only to +70°C | Not suitable for automotive or extended-temperature industrial use; acceptable for cost-sensitive consumer audio | Select TL081CDR only when ambient temperature stays below 70°C and offset budget allows ±3 mV |
| OPA1611AIDR | Lower noise (1.1 nV/√Hz), higher slew rate (25 V/μs), rail-to-rail output, but higher quiescent current (3.6 mA/ch) | Preferred for ultra-low-noise studio preamps; not drop-in due to different pinout and supply sensitivity | Choose OPA1611AIDR when SNR >110 dB is required and board layout allows SO-8 rework for new footprint |
Compared with TL081IDR, TL081CDR trades temperature range and precision for lower cost, while OPA1611AIDR delivers superior noise and speed at higher power and non-compatible packaging-making TL081IDR the optimal balance of ruggedness, precision, and SOIC-8 compatibility for industrial signal chains.
Availability
TL081IDR is available at Aetrix Electronics and suitable for solar energy inverters, motor drive control modules, and battery test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL081IDR 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of op-amp innovation and broad industrial qualification.
The TL081IDR belongs to TI's legacy FET-input op-amp family, engineered for high-speed precision analog signal conditioning in harsh environments where low bias current, wide supply range, and robust ESD performance are essential.
FAQ
What is the maximum operating temperature for TL081IDR?
The TL081IDR is specified for operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD22-A108 and supports deployment in under-hood automotive modules, outdoor solar inverters, and industrial motor drives where thermal stress exceeds commercial-grade limits. The TL081IDR maintains all key parameters-including 95 dB CMRR and ±1 mV offset-across this full range.
Does TL081IDR support single-supply operation?
Yes, TL081IDR supports single-supply operation from 4.5 V to 40 V. Its common-mode input range extends to VCC+, allowing input signals referenced to ground or mid-supply. However, output swing is limited to ~210 mV from each rail under 10 kΩ load, so level-shifting or rail-splitting may be needed for true ground-referenced output in single-supply configurations.
What is the input bias current specification for TL081IDR at 125°C?
At TA = 125°C, TL081IDR exhibits input bias current ≤5 nA (max), per Section 5.7 of the datasheet. This remains exceptionally low compared to bipolar-input op-amps and enables high-impedance sensor interfacing-such as piezoelectric accelerometers or pH electrodes-without significant DC error accumulation over temperature.
Can TL081IDR drive a 1000 pF capacitive load?
No-TL081IDR is characterized for stable operation with ≤300 pF capacitive load. Driving 1000 pF risks peaking, overshoot, or oscillation due to phase margin degradation. For heavier loads, add a series isolation resistor (e.g., 50 Ω) between OUT and the capacitance, or use a dedicated buffer like the BUF634A to maintain stability without compromising bandwidth.
How does TL081IDR differ from TL081CP?
TL081IDR uses SOIC-8 packaging with moisture sensitivity level 1 (MSL-1), extended temperature rating (–40°C to +125°C), and enhanced ESD protection (1.5 kV HBM). TL081CP is PDIP-8 packaged, rated only to +70°C, and lacks integrated EMI filtering. Both share identical electrical specs at 25°C, but TL081IDR is qualified for surface-mount automated assembly and harsher end-equipment environments.
TL081IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL081IDR FAQ
1.How can I place an order for TL081IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081IDR 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 TL081IDR reliable?
The price and inventory of TL081IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081IDR is usually 5 days.
3.What payment methods are accepted for TL081IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081IDR?
TL081IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081IDR 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 TL081IDR?
For technical support, including TL081IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081IDR requirements.
6.How does Aetrix verify that TL081IDR is sourced from the original manufacturer or authorized distributors?
All TL081IDR 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 TL081IDR meets industry standards.
7.What is the process for return or replacement of TL081IDR?
All TL081IDR units undergo pre-shipment inspection (PSI). If there is an issue with TL081IDR, 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 TL081IDR part is unused and in its original packaging.
Return procedure for TL081IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081IDR Tags
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