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Texas Instruments TL081CDR
- Part No.:
- TL081CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081CDR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,558
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Product details
Overview
TL081CDR from Texas Instruments is a single-channel JFET-input operational amplifier designed for precision analog signal conditioning in industrial and audio systems. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±15 V supply operation, 100 dB CMRR, and 0.003% THD+N at 1 kHz - enabling high-fidelity amplification in pro audio mixers and battery test equipment.
For engineers reviewing the TL081CDR datasheet, TL081CDR pinout, TL081CDR application, or TL081CDR equivalent, key selection criteria include input offset voltage (±10 mV max), common-mode input range extending to VCC+, FET-input bias current (≤200 pA), and SOIC-8 package compatibility with legacy TL071/TL081 footprints.
Technical Context
The TL081CDR employs a dual-JFET input stage with high-impedance differential pair architecture, enabling ultra-low input bias current and rail-to-rail common-mode input voltage range up to VCC+. Its internal compensation ensures stable unity-gain operation with ≥56° phase margin into 20 pF capacitive loads.
It operates across ±2.25 V to ±20 V supply rails (4.5 V to 40 V total), supports output swing within 1.2 V of rails at 2 kΩ load, and integrates short-circuit protection with ±26 mA current limiting - making it suitable for robust front-end amplification in motor drive feedback loops and UPS sensing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5.25 MHz - enables stable closed-loop operation up to 100 kHz with gain ≥50. |
| Slew rate | 20 V/μs - supports fast transient response in pulse-amplification and active filter applications. |
| Input offset voltage | ±10 mV max (TA = 0°C to 70°C) - sets DC accuracy limit in sensor signal chains without trimming. |
| Common-mode rejection ratio | 100 dB - rejects power-supply noise and ground bounce in single-supply configurations. |
| Total harmonic distortion + noise | 0.003% at 1 kHz - meets fidelity requirements for professional audio preamplifier stages. |
| Supply voltage range | ±2.25 V to ±20 V - allows flexible bipolar operation in legacy industrial control systems. |
| Input bias current | ≤200 pA - preserves signal integrity in high-impedance pH sensors and photodiode transimpedance amps. |
Pinout & Package
The TL081CDR is supplied in an 8-pin SOIC (D) package with standard industry footprint and 1.27 mm lead pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset null (not connected) | Unused in TL081CDR; left unconnected per datasheet recommendation. |
| 2 | Inverting input (IN−) | Differential input node for feedback configuration; high-impedance JFET input (≤200 pA). |
| 3 | Non-inverting input (IN+) | Reference input node; accepts common-mode voltages up to VCC+. |
| 4 | Negative supply (VCC−) | Connects to −VS rail; supports operation down to −2.25 V. |
| 5 | Offset null (not connected) | Unused in TL081CDR; left unconnected per datasheet recommendation. |
| 6 | Output (OUT) | Class-AB output stage capable of sourcing/sinking ±26 mA with short-circuit protection. |
| 7 | Positive supply (VCC+) | Connects to +VS rail; supports operation up to +20 V. |
| 8 | No connect (NC) | Internally unused; must remain floating per TI design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables ≤200 pA input bias current for high-Z sensor interfacing without loading error. |
| Rail-to-rail common-mode input | Accepts signals up to VCC+, simplifying level-shifting in single-supply data acquisition systems. |
| Integrated EMI/RF filters | Provides 53 dB EMI rejection at 1 GHz, improving noise immunity in noisy industrial environments. |
| Output short-circuit protection | Withstands indefinite short to ground with automatic current limiting to ±26 mA. |
| Low 1/f noise | 1.4 µVRMS integrated noise (0.1 Hz–10 Hz) supports precision DC-coupled instrumentation. |
Applications
| Solar Inverter Sensing | Pro Audio Preamplifier |
|---|---|
Use Scenario: Monitoring string voltage and current in central solar inverters under variable irradiance and temperature. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier in shunt-based current sensing and divider-based voltage scaling circuits. Use Value: 100 dB CMRR rejects common-mode noise from switching power stages; ±10 mV offset ensures <0.1% full-scale error at 1000 V input. | Use Scenario: Low-noise microphone preamplification in analog channel strips with 60 dB gain and 20 kHz bandwidth. IC Role / Device Role / Timing Role: First-stage JFET-input op-amp providing high input impedance and low THD+N. Use Value: 0.003% THD+N at 1 kHz and 37 nV/√Hz input voltage noise preserve dynamic range and clarity. |
| Battery Test Equipment | AC Motor Drive Feedback |
Use Scenario: Precision voltage and current measurement during charge/discharge cycling of Li-ion and lead-acid batteries. IC Role / Device Role / Timing Role: Signal conditioner for Kelvin-sense connections and isolation amplifier outputs. Use Value: Input bias current ≤200 pA prevents voltage drop errors across high-value sense resistors (>1 MΩ). | Use Scenario: Amplifying isolated current-sense signals from shunts or Hall-effect sensors in three-phase inverter legs. IC Role / Device Role / Timing Role: High-speed comparator driver and analog signal buffer before ADC sampling. Use Value: 20 V/μs slew rate supports accurate reconstruction of 10 kHz PWM edge transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL071CDR | Lower input noise (18 nV/√Hz vs 37 nV/√Hz), same SOIC-8 package and pinout. | Better suited for low-noise audio preamps; less ideal for high-common-mode industrial sensing due to narrower VCM range. | Select TL071CDR when noise dominates design; retain TL081CDR when VCM-to-VCC+ support is required. |
| OPA1671IDR | Higher precision (±0.3 mV offset), rail-to-rail I/O, but requires external compensation for stability at G ≥ 5. | Targeted at premium audio; not drop-in compatible due to different pinout and supply range (±2.25 V to ±18 V). | Choose OPA1671IDR only for new designs prioritizing offset and noise; TL081CDR remains optimal for cost-sensitive, pin-compatible upgrades. |
Compared with TL071CDR and OPA1671IDR, the TL081CDR uniquely balances wide common-mode input (to VCC+), robust short-circuit protection, and SOIC-8 footprint compatibility - making it the preferred choice for industrial retrofits and mixed-signal systems where reliability and layout continuity matter.
Availability
TL081CDR is available at Aetrix Electronics and suitable for solar inverter sensing, pro audio preamplifiers, and battery test equipment requiring stable component supply over extended production lifecycles.
Supply support for TL081CDR 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 decades of heritage in precision op-amps and industrial-grade ICs.
The TL081CDR belongs to TI's legacy TL08x family - engineered for cost-sensitive, high-reliability analog signal conditioning in industrial control, power conversion, and audio systems where JFET input performance and proven field reliability are essential.
FAQ
What is the maximum supply voltage rating for TL081CDR?
The TL081CDR supports a total supply voltage (VCC+ to VCC−) of up to 40 V, corresponding to ±20 V operation. Absolute maximum ratings specify 42 V for non-NS/PS packages, but recommended operating conditions limit continuous use to 40 V to ensure long-term reliability and thermal stability per TI's SLOS081O datasheet.
Does TL081CDR support rail-to-rail input operation?
Yes, the TL081CDR features a rail-to-rail common-mode input voltage range extending to VCC+, as confirmed in Section 5.7 of the datasheet. However, its output swing is not rail-to-rail - it typically delivers ±12 V into 10 kΩ with ±15 V supplies, with headroom of ~1.2 V from each rail under load.
Is TL081CDR pin-compatible with TL071CDR?
Yes, TL081CDR and TL071CDR share identical SOIC-8 (D) packaging and pinout: Pin 2 is IN−, Pin 3 is IN+, Pin 4 is VCC−, Pin 6 is OUT, and Pin 7 is VCC+. This allows direct substitution in existing layouts, though designers must verify noise, offset, and CMRR requirements per application.
What is the typical input bias current of TL081CDR at 25°C?
The typical input bias current of TL081CDR is 65 pA at 25°C, with a maximum of 200 pA over the full 0°C to 70°C operating range. This ultra-low value stems from its JFET differential input stage and enables accurate amplification of signals from high-impedance sources like piezoelectric sensors and photodiodes.
Does TL081CDR include ESD protection?
Yes, TL081CDR features integrated ESD protection rated at ±1500 V HBM (Human Body Model) and ±1000 V CDM (Charged Device Model), as specified in Section 5.2 of the TI datasheet. This level exceeds JEDEC standards for manufacturing handling and improves robustness in field-deployed industrial equipment.
TL081CDR 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
TL081CDR FAQ
1.How can I place an order for TL081CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081CDR 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 TL081CDR reliable?
The price and inventory of TL081CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081CDR is usually 5 days.
3.What payment methods are accepted for TL081CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081CDR?
TL081CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081CDR 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 TL081CDR?
For technical support, including TL081CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081CDR requirements.
6.How does Aetrix verify that TL081CDR is sourced from the original manufacturer or authorized distributors?
All TL081CDR 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 TL081CDR meets industry standards.
7.What is the process for return or replacement of TL081CDR?
All TL081CDR units undergo pre-shipment inspection (PSI). If there is an issue with TL081CDR, 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 TL081CDR part is unused and in its original packaging.
Return procedure for TL081CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081CDR Tags
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