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Texas Instruments TL081ACDR
- Part No.:
- TL081ACDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081ACDR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,405
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Product details
Overview
TL081ACDR from Texas Instruments is a single-channel JFET-input operational amplifier optimized for precision DC-coupled and wideband AC signal conditioning. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±1 mV input offset voltage (typ), 105 dB CMRR, and operates from ±2.25 V to ±20 V supplies. It serves as the core amplification stage in battery test equipment front-ends and pro audio mixer channel strips.
For engineers reviewing the TL081ACDR datasheet, TL081ACDR pinout, TL081ACDR application, or TL081ACDR equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in high-EMI industrial environments, and validated alternative options for cost- or performance-driven redesigns.
Technical Context
The TL081ACDR implements a high-slew-rate JFET-input differential pair with cascoded gain stage and Class AB output buffer, enabling stable unity-gain operation with up to 300 pF capacitive load. Its input stage supports common-mode voltage extending to VCC+, eliminating level-shifting requirements in single-supply sensor interfaces.
It features integrated EMI/RF filters and 1.5 kV HBM ESD protection, making it suitable for motor drive current-sense amplification and solar inverter voltage monitoring where conducted noise immunity is critical. The device is characterized across –40°C to +85°C (TL081A grade) with guaranteed DC precision parameters including ±5 mV max offset and ±18 µV/°C drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5.25 MHz - Enables stable closed-loop gain ≥10 at 500 kHz for anti-aliasing filter design. |
| Slew rate | 20 V/μs - Supports 10 Vpp full-power bandwidth of ~320 kHz without distortion in audio line drivers. |
| Input offset voltage | ±1 mV (typ), ±5 mV (max) - Ensures ≤0.05% error in 20 V full-scale battery voltage measurement circuits. |
| Common-mode rejection ratio | 105 dB (min) - Rejects >300 V of common-mode noise in three-phase UPS feedback loops. |
| Supply voltage range | ±2.25 V to ±20 V - Allows direct interface with ±15 V legacy instrumentation and ±5 V modern control systems. |
| Input bias current | 65–200 pA - Permits use with >10 MΩ source impedances in piezoelectric sensor conditioning without significant DC error. |
| Quiescent current | 1.4–2.5 mA per amplifier - Enables low-power operation in always-on battery test equipment standby modes. |
Pinout & Package
TL081ACDR is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, surface-mount compatible with standard reflow profiles and IPC-7351B land patterns. Thermal resistance RθJA is 95°C/W, supporting continuous operation at ambient temperatures up to +85°C with minimal heatsinking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (N1) | Connects to external potentiometer for manual input offset trimming in precision DC applications. |
| 2 | Inverting Input (IN–) | Differential input node; high-impedance JFET gate accepting signals up to VCC+ rail. |
| 3 | Non-inverting Input (IN+) | Differential input node; supports rail-to-rail common-mode range including VCC+. |
| 4 | VCC– | Negative supply rail connection; must be decoupled with ≥0.1 µF ceramic capacitor near pin. |
| 5 | Offset Null (N2) | Second terminal of external trim-pot; used with Pin 1 to nullify input offset voltage. |
| 6 | Output (OUT) | Class AB buffered output capable of sourcing/sinking ±26 mA into resistive loads. |
| 7 | VCC+ | Positive supply rail connection; accepts up to ±20 V differential supply voltage. |
| 8 | No Connect (NC) | Internally unconnected; must remain floating-no PCB trace or component attachment. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input | Accepts signals up to VCC+, enabling single-supply operation without input clamping diodes or level shifters. |
| Integrated EMI/RF filters | Rejects 1 GHz interference with 53 dB EMIRR, reducing need for external ferrite beads in noisy motor drive PCBs. |
| Output short-circuit protection | Limits fault current to ±26 mA indefinitely, preventing latch-up during transient overloads in UPS power stages. |
| Low THD+N | 0.003% at 1 kHz ensures <100 µV harmonic content in 6 VRMS pro audio line outputs. |
| High PSRR | 100 dB power supply rejection maintains DC accuracy despite ±100 mV ripple on ±15 V rails in industrial SMPS environments. |
Applications
| Battery Test Equipment | Pro Audio Mixer Channel Strip |
|---|---|
Use Scenario: Precision measurement of open-circuit voltage and internal resistance of Li-ion cells during charge/discharge cycling. IC Role / Device Role / Timing Role: Primary DC-coupled instrumentation amplifier in the voltage sensing path, configured as non-inverting gain-of-10 with matched resistor network. Use Value: ±1 mV offset enables sub-10 mV absolute voltage accuracy across 0–4.2 V cell range, meeting IEC 62133 compliance testing requirements. |
Use Scenario: Low-noise preamplification and equalization of microphone-level signals before ADC conversion in digital mixing consoles. IC Role / Device Role / Timing Role: First-stage gain block with 37 nV/√Hz input voltage noise density and 105 dB CMRR rejecting phantom power coupling. Use Value: 0.003% THD+N preserves transient fidelity of drum transients and vocal sibilance above 10 kHz without audible coloration. |
| Solar String Inverter Voltage Monitoring | AC Motor Drive Current Sensing |
Use Scenario: Isolated DC bus voltage feedback in string inverters operating at up to 1000 VDC with high dv/dt switching noise. IC Role / Device Role / Timing Role: High-common-mode rejection amplifier in resistive divider interface, driving isolated sigma-delta modulator inputs. Use Value: 105 dB CMRR suppresses >300 V common-mode transients induced by IGBT switching, ensuring accurate MPPT algorithm execution. |
Use Scenario: Amplification of millivolt-level shunt resistor signals in three-phase inverter legs under PWM switching conditions. IC Role / Device Role / Timing Role: Differential input stage rejecting common-mode noise from adjacent power traces while preserving fast current step response. Use Value: 20 V/μs slew rate resolves 10 A/μs current transients during hard-switching events without slew-induced distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL081CDR | Wider temperature range (0°C to 70°C vs –40°C to 85°C); higher max input offset (10 mV vs 5 mV). | Lower-cost option for commercial-grade audio gear or non-critical industrial controls where extended temp rating is unnecessary. | Select TL081CDR only when ambient operating temperature remains within 0–70°C and ±10 mV offset is acceptable. |
| OPA2134PA | Lower noise (8 nV/√Hz), lower distortion (0.00008% THD+N), but higher quiescent current (4 mA) and no offset null pins. | Preferred for ultra-low-noise studio-grade mic preamps where PCB space allows larger SO-8 footprint and thermal management. | Choose OPA2134PA when noise floor and harmonic purity outweigh cost and power constraints in premium audio designs. |
Compared with TL081CDR, TL081ACDR offers tighter DC specs and wider temperature capability for harsher environments; versus OPA2134PA, it trades noise performance for lower power and offset adjustability-critical for battery-powered test equipment requiring long-term calibration stability.
Availability
TL081ACDR is available at Aetrix Electronics and suitable for battery test equipment, pro audio mixers, solar string inverters, and AC motor drives requiring stable component supply across multi-year production cycles.
Supply support for TL081ACDR 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 90 years of innovation in precision signal chain components.
The TL081ACDR belongs to TI's legacy JFET-input op-amp family designed for industrial-grade DC precision and wideband AC performance in cost-sensitive, high-reliability applications.
FAQ
What is the maximum capacitive load the TL081ACDR can drive stably?
The TL081ACDR is specified to drive up to 300 pF capacitive load while maintaining phase margin ≥56° and avoiding peaking or oscillation. This enables direct connection to ADC input capacitors or long PCB traces in battery monitoring systems without requiring isolation resistors. For loads exceeding 300 pF, a series resistor (≥100 Ω) between TL081ACDR output and capacitance restores stability. Always verify loop response using SPICE simulation with actual board parasitics.
Does the TL081ACDR support single-supply operation?
Yes, the TL081ACDR supports true single-supply operation due to its common-mode input voltage range extending to VCC+. When powered from +5 V and GND, it accepts input signals from 0 V to +5 V, making it suitable for interfacing with microcontroller ADCs or sensors in portable equipment. However, output swing is limited to ~105–215 mV from each rail, so mid-rail biasing (e.g., 2.5 V reference) is required for bipolar signal handling.
How do I use the offset null pins (1 and 5) on the TL081ACDR?
Pins 1 (OFFSET N1) and 5 (OFFSET N2) connect to the ends of a 10 kΩ potentiometer, with the wiper tied to VCC–. Adjusting the potentiometer injects opposing currents into the input stage to cancel inherent input offset voltage. This is essential in precision DC applications like battery voltage measurement where ±1 mV residual offset would cause >0.025% error at 4 V full scale. Do not leave these pins unconnected if trimming is required.
What is the ESD robustness of the TL081ACDR?
The TL081ACDR features 1.5 kV human-body model (HBM) ESD protection per ANSI/ESDA/JEDEC JS-001, verified across all pins. This exceeds standard industrial handling requirements and allows safe assembly in Class 1B ESD environments without additional protection circuitry. However, input pins remain diode-clamped to rails-signals exceeding VCC+ or falling below VCC– by >0.5 V must be current-limited to ≤10 mA to prevent damage.
Can the TL081ACDR replace the TL081CP in existing designs?
Yes, TL081ACDR is a drop-in replacement for TL081CP in most applications, offering identical pinout, SOIC-8 package, and improved specifications: tighter offset voltage (±5 mV max vs ±10 mV), wider temperature range (–40°C to +85°C vs 0°C to +70°C), and enhanced EMI rejection. No PCB changes are required, but verify that the improved performance does not expose latent layout issues-such as insufficient power supply decoupling-that were masked by the looser original specs.
TL081ACDR 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL081ACDR FAQ
1.How can I place an order for TL081ACDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081ACDR 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 TL081ACDR reliable?
The price and inventory of TL081ACDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081ACDR is usually 5 days.
3.What payment methods are accepted for TL081ACDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081ACDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081ACDR?
TL081ACDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081ACDR 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 TL081ACDR?
For technical support, including TL081ACDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081ACDR requirements.
6.How does Aetrix verify that TL081ACDR is sourced from the original manufacturer or authorized distributors?
All TL081ACDR 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 TL081ACDR meets industry standards.
7.What is the process for return or replacement of TL081ACDR?
All TL081ACDR units undergo pre-shipment inspection (PSI). If there is an issue with TL081ACDR, 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 TL081ACDR part is unused and in its original packaging.
Return procedure for TL081ACDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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