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Texas Instruments TL081BCP
- Part No.:
- TL081BCP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL081BCP.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:888
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Product details
Overview
TL081BCP 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, 37 nV/√Hz input voltage noise at 1 kHz, ±2.25 V to ±20 V dual-supply operation, and rail-to-rail common-mode input range extending to VCC+. It is used in pro audio mixers and battery test equipment where low noise and high slew rate are critical.
For engineers reviewing the TL081BCP datasheet, TL081BCP pinout, TL081BCP application, or TL081BCP equivalent, this page provides verified specifications, SOIC-8 package details, functional pin definitions, real-world use cases in power electronics and instrumentation, and two validated alternative op-amps with documented performance trade-offs.
Technical Context
The TL081BCP employs a JFET-input differential pair enabling ultra-low input bias current (≤120 pA typ) and high input impedance (>1 TΩ), making it suitable for high-source-impedance sensor interfaces. Its internal compensation ensures unity-gain stability with ≥5.25 MHz gain-bandwidth product and 56° phase margin under 20 pF capacitive load.
It features output short-circuit protection, EMI/RF filtering, and operates across 0°C to 70°C ambient temperature. The device supports wide supply ranges (±2.25 V to ±20 V or 4.5 V to 40 V) and includes common-mode input voltage range that includes VCC+, enabling single-supply configurations with proper biasing.
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) - minimizes DC error in precision amplification stages, reducing calibration burden |
| Input Voltage Noise | 37 nV/√Hz at 1 kHz - supports low-noise signal acquisition in microphone preamps and sensor front-ends |
| Supply Voltage Range | ±2.25 V to ±20 V - accommodates both low-voltage portable designs and high-voltage industrial rails |
| Common-Mode Input Range | Includes VCC+ - allows direct interface with signals referenced to positive rail in single-supply applications |
| Quiescent Current | 940 μA/ch (typ) - balances low-power operation with high-speed performance for battery-aware systems |
| Gain-Bandwidth Product | 5.25 MHz - supports stable closed-loop gain up to ~50 at 100 kHz for anti-aliasing and active filtering |
Pinout & Package
TL081BCP is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package (package code D), with standard pinout compatible across TL081x variants. Thermal resistance RθJA is 158.8°C/W, supporting moderate power dissipation in compact PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - must remain unconnected per datasheet; not internally bonded |
| 2 | IN− | Inverting input - accepts feedback network connection for stable closed-loop gain configuration |
| 3 | IN+ | Non-inverting input - connects to reference or sensor signal; high-impedance JFET input minimizes loading |
| 4 | VCC− | Negative supply rail - must be decoupled locally to suppress ground bounce and supply noise |
| 5 | NC | No connect - unused pin; floating or grounded connection degrades EMI performance |
| 6 | OUT | Amplifier output - drives loads up to 2 kΩ with ≤210 mV headroom to positive rail at 40 V supply |
| 7 | VCC+ | Positive supply rail - requires local 0.1 μF ceramic decoupling capacitor adjacent to pin |
| 8 | NC | No connect - electrically isolated; solder mask coverage recommended to prevent contamination |
Key Features
| Feature | Design Value |
|---|---|
| High Slew Rate | 20 V/μs enables faithful amplification of fast-rising control signals in motor drive feedback paths |
| Low Input Bias Current | ≤120 pA (typ) preserves signal integrity when interfacing with high-impedance pH sensors or piezoelectric transducers |
| Output Short-Circuit Protection | Withstands indefinite short to ground on one amplifier - eliminates need for external current-limiting resistors |
| EMI/RF Filtering | Integrated filters reject 1 GHz interference - critical for reliable operation in noisy industrial environments |
| Wide Supply Range | Operates from ±2.25 V to ±20 V - supports reuse across multiple voltage domains without redesign |
Applications
| Pro Audio Mixer Channel | Battery Test Equipment |
|---|---|
|
Use Scenario: Amplifying low-level microphone or line-level signals before ADC conversion in multi-channel mixing consoles. IC Role / Device Role / Timing Role: Precision DC-coupled preamplifier with adjustable gain and low THD+N (0.003% typ). Use Value: 37 nV/√Hz input noise and 20 V/μs slew rate preserve transient fidelity and dynamic range in 24-bit audio paths. |
Use Scenario: Sensing voltage and current during charge/discharge cycling of Li-ion and lead-acid batteries. IC Role / Device Role / Timing Role: High-impedance buffer and differential amplifier in precision shunt-based current measurement circuits. Use Value: 1 mV offset and ±2 μV/°C drift ensure <±1 mV total error over 0–70°C, meeting Class 0.1 accuracy requirements. |
| Solar String Inverter Monitoring | AC Motor Drive Feedback |
|
Use Scenario: Isolated voltage sensing of PV string outputs for MPPT algorithm inputs and overvoltage protection. IC Role / Device Role / Timing Role: Signal conditioner between isolation amplifier output and MCU ADC input. Use Value: Common-mode input range including VCC+ simplifies level-shifting design when interfacing with isolated ±15 V outputs. |
Use Scenario: Amplifying back-EMF or current-sense signals in three-phase inverter gate driver feedback loops. IC Role / Device Role / Timing Role: Fast-settling comparator input buffer and analog integrator stage in field-oriented control (FOC) loops. Use Value: 0.56 μs settling time to 0.1% for 2 V step enables accurate sampling within tight PWM dead-time windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL081CP | Same SOIC-8 package; wider offset voltage spec (3–10 mV max vs B-grade's 1–4 mV); higher quiescent current (1.4–2.5 mA vs 0.94 mA) | Acceptable in non-critical DC-coupled gain stages where cost is prioritized over precision | Select TL081CP only when offset drift and noise are not system-limiting factors |
| OPA1671IDR | CMOS input (vs JFET); lower noise (4.5 nV/√Hz); rail-to-rail output; higher supply current (1.6 mA); no built-in short-circuit protection | Better suited for ultra-low-noise audio preamps but requires external fault protection in industrial settings | Choose OPA1671IDR when noise dominates system SNR and output swing to rail is mandatory |
Compared with TL081BCP, TL081CP trades precision for cost and offers no performance advantage in speed or noise, while OPA1671IDR improves noise and output swing but sacrifices robustness and increases layout complexity due to missing short-circuit protection.
Availability
TL081BCP is available at Aetrix Electronics and suitable for pro audio mixer channel design, battery test equipment signal conditioning, solar string inverter monitoring, and AC motor drive feedback requiring stable component supply across extended production cycles.
Supply support for TL081BCP 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 TL081B series belongs to TI's legacy FET-input op-amp family, engineered for cost-sensitive precision analog applications demanding low input bias current, wide supply range, and robust EMI immunity in harsh environments.
FAQ
What is the maximum operating temperature range for TL081BCP?
The TL081BCP is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade rating aligns with its "C" suffix designation and makes it suitable for indoor industrial equipment and consumer audio products where thermal management is controlled. The TL081BCP does not support extended temperature grades like the TL081I (–40°C to +85°C) or TL081M (–55°C to +125°C).
Does TL081BCP support single-supply operation?
Yes, TL081BCP supports single-supply operation due to its common-mode input voltage range extending to VCC+. When powered from a single 15 V rail, the input can accept signals from ground up to 15 V. However, output swing is limited to ~13.5 V peak (with 10 kΩ load), so proper biasing of the non-inverting input (e.g., at VCC/2) is required for AC-coupled applications.
What is the input offset voltage specification for TL081BCP?
The TL081BCP has a typical input offset voltage of 1 mV and a maximum of ±4 mV at 25°C, per the TL08xH electrical characteristics table. Over the full 0°C to +70°C range, the maximum offset is ±5 mV. This B-grade precision is tighter than the standard TL081C (3–10 mV), making TL081BCP appropriate for applications requiring reduced DC error without resorting to auto-zero op-amps.
Can TL081BCP drive capacitive loads directly?
TL081BCP is characterized to drive up to 300 pF capacitive load while maintaining stability, as confirmed by its 56° phase margin at 20 pF and small-signal overshoot data. For loads exceeding 300 pF, external isolation resistance (e.g., 10–100 Ω in series with the output) is recommended to prevent peaking or oscillation, especially in high-gain configurations.
Is TL081BCP pin-compatible with other TL081 variants in SOIC-8?
Yes, TL081BCP uses the standard 8-pin SOIC (D package) footprint and identical pinout as TL081CP, TL081AC, and TL081H - all share pins 1 (NC), 2 (IN−), 3 (IN+), 4 (VCC−), 5 (NC), 6 (OUT), 7 (VCC+), and 8 (NC). This allows drop-in replacement within the same package, provided the system design accounts for differences in offset, noise, and supply current across grades.
TL081BCP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 2 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL081BCP FAQ
1.How can I place an order for TL081BCP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081BCP 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 TL081BCP reliable?
The price and inventory of TL081BCP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081BCP is usually 5 days.
3.What payment methods are accepted for TL081BCP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081BCP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081BCP?
TL081BCP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081BCP 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 TL081BCP?
For technical support, including TL081BCP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081BCP requirements.
6.How does Aetrix verify that TL081BCP is sourced from the original manufacturer or authorized distributors?
All TL081BCP 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 TL081BCP meets industry standards.
7.What is the process for return or replacement of TL081BCP?
All TL081BCP units undergo pre-shipment inspection (PSI). If there is an issue with TL081BCP, 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 TL081BCP part is unused and in its original packaging.
Return procedure for TL081BCP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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