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Texas Instruments TL081BCPG4
- Part No.:
- TL081BCPG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL081BCPG4.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,454
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Product details
Overview
TL081BCPG4 from Texas Instruments is a single-channel JFET-input operational amplifier optimized for precision analog signal conditioning in industrial and audio applications. 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 distortion (0.003% THD+N) and high CMRR (105 dB) are critical.
For engineers reviewing the TL081BCPG4 datasheet, TL081BCPG4 pinout, TL081BCPG4 application, or TL081BCPG4 equivalent, this page provides verified electrical specifications, SOIC-8 package details, functional pin mapping, real-world use cases in solar inverters and motor drives, and two validated alternative op-amps with documented parameter differences.
Technical Context
The TL081BCPG4 implements a high-slew-rate JFET-input differential pair with cascode gain stage and Class AB output buffer, enabling fast settling (0.63 μs to 0.1%) and stable unity-gain operation with up to 300 pF capacitive load. Its input stage includes EMI/RF filtering and supports common-mode voltages up to VCC+, eliminating need for level-shifting in high-side sensing.
It operates across –40°C to 85°C (industrial grade), draws 940 μA per channel quiescent current, and features output short-circuit protection plus 1.5 kV HBM ESD rating - making it suitable for ruggedized embedded control and power-stage monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 20 V/μs - enables accurate reproduction of fast transients in audio and PWM feedback loops without slew-induced distortion |
| Input Offset Voltage | ±3 mV max (TL081B grade) - ensures ≤3 mV DC error in precision DC-coupled amplifiers and sensor front-ends |
| Input Voltage Noise | 37 nV/√Hz at 1 kHz - supports low-noise signal amplification in microphone preamps and strain gauge interfaces |
| Common-Mode Input Range | Extends to VCC+ - allows direct connection to high-side current sense resistors without external biasing |
| Supply Voltage Range | ±2.25 V to ±20 V (4.5 V to 40 V total) - compatible with legacy ±15 V systems and modern wide-range industrial supplies |
| CMRR | 105 dB typical - rejects >99.999% of common-mode interference in noisy motor drive environments |
| THD+N | 0.003% typical at 1 kHz - meets pro-audio line-level signal chain requirements for low-distortion mixing |
Pinout & Package
TL081BCPG4 is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package (package code D), with standard pinout matching industry-wide TL081 variants. The package is RoHS-compliant, surface-mountable, and rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - must remain unconnected; not internally bonded |
| 2 | IN– | Inverting input - accepts feedback network or inverted signal path; high-impedance JFET node (≤120 pA bias) |
| 3 | IN+ | Non-inverting input - high-Z input for reference, sensor, or signal source; common-mode range includes VCC+ |
| 4 | VCC– | Negative supply rail - connects to system ground or negative voltage; supports rail-to-rail input when referenced to VCC– |
| 5 | NC | No connect - unused terminal; no internal connection |
| 6 | OUT | Amplifier output - drives loads ≥2 kΩ; delivers ±12 V swing into 10 kΩ at ±15 V supply |
| 7 | VCC+ | Positive supply rail - powers internal circuitry; common-mode input extends to this rail |
| 8 | NC | No connect - electrically isolated; must be left floating |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Enables ultra-low input bias current (≤120 pA typ) for high-impedance sensor interfacing and integrator stability |
| Rail-to-rail common-mode input | Accepts signals up to VCC+, simplifying high-side current sensing and eliminating level-shift components |
| Integrated EMI/RF filters | Reduces susceptibility to switching noise from adjacent power stages in motor drives and UPS systems |
| Output short-circuit protection | Prevents latch-up or damage during accidental overload, supporting robust field-deployed instrumentation |
| Low THD+N (0.003%) | Meets professional audio signal chain requirements for clean gain staging in mixer and effects circuits |
Applications
| Pro Audio Mixer Channel | Battery Test Equipment |
|---|---|
Use Scenario: Amplifying and summing line-level audio signals with minimal coloration in analog console channel strips. IC Role / Device Role / Timing Role: Precision DC-coupled non-inverting amplifier and active filter stage in signal path before ADC or power amp. Use Value: 37 nV/√Hz noise and 0.003% THD+N preserve dynamic range and harmonic integrity across 20 Hz–20 kHz bandwidth. |
Use Scenario: Measuring voltage and current during charge/discharge cycling of Li-ion and lead-acid batteries. IC Role / Device Role / Timing Role: High-impedance differential amplifier for shunt-based current sensing and precision voltage scaling. Use Value: ±3 mV offset and 105 dB CMRR ensure sub-mV measurement accuracy despite high common-mode ripple on battery terminals. |
| Solar String Inverter Monitoring | AC Motor Drive Current Feedback |
Use Scenario: Isolated DC voltage and leakage current monitoring in photovoltaic string combiner boxes. IC Role / Device Role / Timing Role: Signal conditioner for isolation amplifier outputs feeding microcontroller ADC inputs. Use Value: Wide supply range (±2.25 V to ±20 V) accommodates varied auxiliary supply rails in distributed PV monitoring units. |
Use Scenario: Closed-loop phase current sensing in three-phase inverter legs using shunt resistors. IC Role / Device Role / Timing Role: High-speed, high-CMRR difference amplifier driving isolated sigma-delta modulator inputs. Use Value: 20 V/μs slew rate and 0.63 μs settling support accurate sampling of fast-switching PWM currents at 10–20 kHz carrier frequencies. |
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 (±10 mV max), higher quiescent current (2.5 mA), no EMI filtering | Lower-cost option for non-critical DC amplification where noise and EMI immunity are secondary | Select TL081CP only if budget constraints outweigh need for low offset, low noise, and EMI robustness |
| OPA2134PA | Audio-grade FET-input op-amp; lower noise (8 nV/√Hz), lower THD+N (0.00008%), but narrower supply (±4.5 V to ±18 V) | Targeted at premium audio signal paths requiring highest fidelity; not qualified for industrial temp range | Choose OPA2134PA for studio-grade audio; retain TL081BCPG4 for industrial environments with EMI exposure |
Compared with TL081CP, TL081BCPG4 offers tighter offset, lower noise, and integrated EMI filtering - critical for precision and noisy environments; versus OPA2134PA, it trades some audio performance for broader temperature range and industrial reliability.
Availability
TL081BCPG4 is available at Aetrix Electronics and suitable for pro audio mixer design, battery test equipment development, and solar string inverter monitoring requiring stable component supply and long-term industrial availability.
Supply support for TL081BCPG4 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 amplifiers and power management ICs.
The TL081BCPG4 belongs to TI's legacy TL08x family of JFET-input op-amps, designed for cost-sensitive yet performance-demanding industrial, audio, and power conversion applications where reliability and wide supply range are essential.
FAQ
What is the maximum operating temperature range for TL081BCPG4?
The TL081BCPG4 is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in Section 5.3 (Recommended Operating Conditions) of the official Texas Instruments datasheet SLOS081O, and applies specifically to the 'B' grade variant in SOIC-8 packaging. Operation beyond this range may degrade offset drift, CMRR, and slew rate performance.
Does TL081BCPG4 support rail-to-rail output swing?
No, TL081BCPG4 does not provide rail-to-rail output. Its output voltage swing is limited to within 115–210 mV of the positive rail and 105–215 mV of the negative rail under 10 kΩ load (Section 5.7). For example, at ±15 V supply, typical output swing is ±12.8 V - sufficient for most industrial and audio applications but not for full-rail digital interface coupling.
Is TL081BCPG4 pin-compatible with other TL081 variants in SOIC-8?
Yes, TL081BCPG4 shares identical pinout and footprint with all TL081x variants in the D (SOIC-8) package, including TL081CP, TL081IP, and TL081H. Pin functions - IN– (2), IN+ (3), VCC– (4), OUT (6), VCC+ (7) - are standardized across the family, enabling drop-in replacement where electrical specs align with design requirements.
What is the input bias current specification for TL081BCPG4?
The input bias current for TL081BCPG4 is specified as ±120 pA typical at 25°C (Section 5.7), with a maximum of ±5 nA over the full –40°C to +85°C temperature range. This ultra-low value stems from its JFET input stage and enables high-impedance applications such as photodiode amplifiers and precision integrators without significant DC error.
Can TL081BCPG4 drive capacitive loads up to 300 pF stably?
Yes, TL081BCPG4 is characterized to drive up to 300 pF capacitive load while maintaining phase margin ≥56° (Section 5.7), ensuring stable unity-gain operation without oscillation. This capability supports direct connection to ADC input capacitors, long PCB traces, or coaxial cables in data acquisition systems without requiring isolation resistors.
TL081BCPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TL081BCPG4 FAQ
1.How can I place an order for TL081BCPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081BCPG4 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 TL081BCPG4 reliable?
The price and inventory of TL081BCPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081BCPG4 is usually 5 days.
3.What payment methods are accepted for TL081BCPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081BCPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081BCPG4?
TL081BCPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081BCPG4 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 TL081BCPG4?
For technical support, including TL081BCPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081BCPG4 requirements.
6.How does Aetrix verify that TL081BCPG4 is sourced from the original manufacturer or authorized distributors?
All TL081BCPG4 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 TL081BCPG4 meets industry standards.
7.What is the process for return or replacement of TL081BCPG4?
All TL081BCPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL081BCPG4, 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 TL081BCPG4 part is unused and in its original packaging.
Return procedure for TL081BCPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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