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Texas Instruments TL081BCD
- Part No.:
- TL081BCD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL081BCD.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
TL081BCD 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 typical input offset voltage, 105 dB common-mode rejection, and operates from ±2.25 V to ±20 V supplies. It is used in pro audio mixer front-ends where low noise (37 nV/√Hz) and rail-to-rail common-mode input (including VCC+) enable high-fidelity signal capture.
For engineers reviewing the TL081BCD datasheet, TL081BCD pinout, TL081BCD application, or TL081BCD equivalent, this page provides verified electrical specifications, SOIC-8 package terminal mapping, real-world use cases in solar inverter monitoring and battery test equipment, and validated alternative options for design continuity.
Technical Context
The TL081BCD employs a dual-JFET input stage with high-impedance differential pair (ZICM = 6 TΩ || 1 pF), enabling ultra-low input bias current (±1 pA typ) and minimal loading of high-Z sensor sources. Its internal compensation ensures stable unity-gain operation with up to 300 pF capacitive load drive.
It features output short-circuit protection, EMI/RF filtering, and 1.5 kV HBM ESD rating. The device supports full-rail common-mode input (VCM includes VCC+) and delivers 115–215 mV headroom from both supply rails at ±20 V with 10 kΩ load - critical for accurate signal reconstruction in industrial analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5.25 MHz - enables stable closed-loop operation up to 100 kHz with G = 50, suitable for anti-aliasing and active filter stages. |
| Slew rate | 20 V/μs - supports clean 10 VPP sine wave reproduction up to ~300 kHz without distortion in unity-gain buffer configurations. |
| Input offset voltage | ±1 mV (typ) - limits DC error to <100 μV in 100× gain instrumentation amplifiers, reducing calibration burden in precision measurement. |
| Common-mode rejection | 105 dB (typ) - suppresses power-supply ripple and ground noise by >3 million times, essential for noisy motor-drive environments. |
| Supply voltage range | ±2.25 V to ±20 V - accommodates dual-rail systems from low-power portable gear to industrial ±15 V legacy designs without level-shifting. |
| Input voltage noise density | 37 nV/√Hz at 1 kHz - maintains SNR >90 dB for 20 kHz audio bandwidth when driving 600 Ω loads, meeting pro-audio THD+N <0.003%. |
| Quiescent current | 940 μA/ch (typ) - enables multi-channel analog signal chains with sub-10 mA total supply draw, supporting thermally constrained PCB layouts. |
Pinout & Package
TL081BCD 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 158.8°C/W, supporting continuous operation at ambient temperatures up to +85°C with minimal heatsinking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - must remain unconnected per datasheet; floating or tied to ground degrades CMRR and noise performance. |
| 2 | IN− | Inverting input - high-impedance JFET node (ZID = 100 MΩ || 2 pF); requires guarded trace routing in high-precision applications. |
| 3 | IN+ | Non-inverting input - accepts common-mode voltages up to VCC+, enabling direct sensing of signals referenced to positive rail (e.g., shunt-based current monitors). |
| 4 | VCC− | Negative supply pin - must be decoupled with ≥0.1 μF ceramic capacitor placed within 3 mm of pin to suppress high-frequency oscillation. |
| 5 | NC | No connect - electrically isolated; solder mask coverage recommended to prevent accidental shorts during assembly. |
| 6 | OUT | Amplifier output - capable of sourcing/sinking ±26 mA; drives 2 kΩ loads with ≤210 mV headroom from VCC+ at ±20 V supply. |
| 7 | VCC+ | Positive supply pin - supports rail-to-rail input common-mode range; decoupling identical to VCC− required for stability. |
| 8 | NC | No connect - unused terminal; no internal connection; leave unpopulated on PCB footprint. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Input bias current ≤1 pA (typ) - preserves signal integrity from high-output-impedance sources like piezoelectric sensors and photodiode transimpedance nodes. |
| Rail-inclusive common-mode range | VCM extends to VCC+ - eliminates need for level-shifting circuitry when amplifying signals referenced to positive supply (e.g., battery cell voltage monitoring). |
| Integrated EMI/RF filters | 53 dB EMI rejection at 1 GHz - mitigates RF rectification in switch-mode power supply environments without external ferrite beads or RC snubbers. |
| Output short-circuit protection | Self-limiting current ≤±26 mA - prevents latch-up and thermal runaway during transient overloads, enhancing system reliability in motor-control feedback loops. |
| Low THD+N | 0.00012% (typ) at 1 kHz - meets Class A audio and precision data acquisition requirements where harmonic distortion must remain below 12-bit LSB thresholds. |
Applications
| Solar Inverter String Monitoring | Battery Test Equipment |
|---|---|
|
Use Scenario: Measuring individual PV module voltage and current under variable irradiance and temperature. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier in shunt-based current sensing and resistive divider-based voltage scaling paths. Use Value: ±1 mV offset and 105 dB CMRR reject inverter switching noise and ground potential differences across long string runs. |
Use Scenario: High-accuracy charge/discharge current and voltage profiling during battery cycle testing. IC Role / Device Role / Timing Role: Low-drift signal conditioner for 24-bit delta-sigma ADC front-end, operating from ±15 V rails. Use Value: 2 μV/°C drift and 37 nV/√Hz noise ensure <0.01% measurement accuracy over –20°C to +70°C ambient range. |
| Pro Audio Mixer Input Stage | AC Motor Drive Current Feedback |
|
Use Scenario: Low-noise preamplification of microphone and line-level inputs before digital conversion. IC Role / Device Role / Timing Role: Unity-gain buffer and active filter element in analog summing and equalization circuits. Use Value: 20 V/μs slew rate and 0.00012% THD+N preserve transient fidelity and harmonic purity across 20 Hz–20 kHz bandwidth. |
Use Scenario: Isolated current sensing in three-phase IGBT gate driver feedback loops. IC Role / Device Role / Timing Role: Signal conditioning for Hall-effect or shunt-based current sensors feeding PWM controllers. Use Value: Output short-circuit protection and 1.5 kV HBM ESD rating withstand repeated EMI transients in industrial motor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL081CDR | Same SOIC-8 package; wider temp range (0°C to 70°C vs –40°C to 85°C for TL081BCD); higher max offset (10 mV vs 3 mV) | Acceptable for commercial-grade audio and lab equipment; not rated for extended industrial ambient conditions | Select TL081CDR only if cost sensitivity outweighs temperature stability and offset performance requirements. |
| OPA140AIDR | FET-input, 11 MHz GBW, 20 V/μs SR, ±125 μV max offset, rail-to-rail output, 1.8 mA IQ - superior precision but higher power and cost | Used in high-resolution data loggers and medical instrumentation requiring sub-10 μV offset and 120 dB CMRR | Choose OPA140AIDR when TL081BCD's 1 mV offset or 5.25 MHz bandwidth is insufficient for target accuracy or speed. |
Compared with TL081CDR, TL081BCD offers tighter offset and extended temperature capability; compared with OPA140AIDR, it trades precision and bandwidth for lower quiescent current and cost - making TL081BCD optimal for industrial analog signal chains balancing performance, robustness, and BOM efficiency.
Availability
TL081BCD is available at Aetrix Electronics and suitable for solar inverter monitoring, battery test equipment, pro audio mixers, and AC motor drive current feedback requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL081BCD 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 delivering analog and embedded processing solutions, with over 50 years of op-amp innovation and broad manufacturing scale.
The TL08xx family was engineered for cost-sensitive industrial and audio applications requiring JFET-input performance, high slew rate, and rugged operation - bridging legacy bipolar op-amps and modern precision alternatives.
FAQ
What is the maximum supply voltage for TL081BCD?
The TL081BCD supports a total supply voltage (VCC+ – VCC−) of up to 40 V, corresponding to ±20 V dual-rail operation. Absolute maximum ratings specify 42 V for non-NS/PS packages, but TI recommends staying within 40 V for reliable long-term operation per SLOS081O Section 5.1.
Does TL081BCD have rail-to-rail input capability?
Yes - the TL081BCD features a rail-inclusive common-mode input range extending to VCC+. Per datasheet Section 5.7, VCM spans (VCC−) + 1.5 V to VCC+, enabling direct interface with signals referenced to the positive supply rail, such as high-side current shunt amplifiers.
What is the typical input bias current of TL081BCD?
The TL081BCD exhibits a typical input bias current of ±1 pA at 25°C, with a maximum of ±120 pA over –40°C to +125°C. This ultra-low value stems from its JFET differential input stage and makes TL081BCD suitable for high-impedance sensor interfaces where leakage would otherwise dominate error budgets.
Can TL081BCD drive capacitive loads?
Yes - the TL081BCD is characterized to drive up to 300 pF capacitive loads while maintaining stability, as confirmed in Section 5.7 (CLOAD = 300 pF). For loads exceeding this, external isolation resistors (e.g., 10–50 Ω in series with the output) are recommended to prevent peaking or oscillation.
Is TL081BCD pin-compatible with other TL081 variants?
Yes - all TL081x variants in SOIC-8 (D) package, including TL081CDR, TL081ACD, and TL081HCD, share identical pinout per Table 4-1 and Figure 4-3. However, electrical specs (offset, drift, bandwidth) differ; TL081BCD is specifically characterized for ±3 mV max offset and –40°C to +85°C operation.
TL081BCD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL081BCD FAQ
1.How can I place an order for TL081BCD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL081BCD 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 TL081BCD reliable?
The price and inventory of TL081BCD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL081BCD is usually 5 days.
3.What payment methods are accepted for TL081BCD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL081BCD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL081BCD?
TL081BCD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL081BCD 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 TL081BCD?
For technical support, including TL081BCD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL081BCD requirements.
6.How does Aetrix verify that TL081BCD is sourced from the original manufacturer or authorized distributors?
All TL081BCD 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 TL081BCD meets industry standards.
7.What is the process for return or replacement of TL081BCD?
All TL081BCD units undergo pre-shipment inspection (PSI). If there is an issue with TL081BCD, 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 TL081BCD part is unused and in its original packaging.
Return procedure for TL081BCD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL081BCD Tags
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