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Texas Instruments TL084BCNG4
- Part No.:
- TL084BCNG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TL084BCNG4.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
TL084BCNG4 from Texas Instruments is a quad JFET-input operational amplifier designed for precision analog signal conditioning in industrial and audio systems. It delivers 20 V/μs slew rate, ±1 mV input offset voltage (typ), 5.25 MHz gain-bandwidth product, 125 dB open-loop gain, and operates from ±2.25 V to ±20 V supplies. It is used in pro audio mixers and battery test equipment where low noise (37 nV/√Hz at 1 kHz) and rail-to-rail common-mode input (including VCC+) are critical.
For engineers reviewing the TL084BCNG4 datasheet, TL084BCNG4 pinout, TL084BCNG4 application, or TL084BCNG4 equivalent, this page provides verified electrical specifications, package-validated pin functions, real-world use cases in solar inverters and motor drives, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The TL084BCNG4 implements a high-slew-rate JFET-input stage with integrated EMI/RF filters and 1.5 kV HBM ESD protection. Its input stage supports common-mode voltage up to VCC+, enabling single-supply operation with ground-referenced inputs. The quad architecture shares thermal and supply characteristics across all four amplifiers without crosstalk degradation beyond 1 μV/V channel separation at DC.
It features low input bias current (±1 pA typ), low offset drift (±2 μV/°C), and output short-circuit protection. The device meets full industrial temperature range (–40°C to +125°C) and supports capacitive loads up to 300 pF while maintaining stable phase margin (56° at G = +1).
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) - ensures minimal DC error in precision instrumentation and sensor front-ends |
| Gain-Bandwidth Product | 5.25 MHz - supports stable unity-gain buffering and closed-loop designs up to ~100 kHz with adequate phase margin |
| Input Voltage Noise | 37 nV/√Hz at 1 kHz - suitable for low-level signal amplification in battery test and audio applications |
| Supply Voltage Range | ±2.25 V to ±20 V (or 4.5 V to 40 V) - allows flexible dual- or single-supply operation in industrial power rails |
| Common-Mode Input Range | Includes VCC+ - permits direct interface with sensors operating at or near positive rail without level-shifting |
| Quiescent Current | 937.5–1125 μA per amplifier - balances low power consumption with high-speed performance for multi-channel systems |
Pinout & Package
The TL084BCNG4 is supplied in a 14-pin PDIP (N) package with through-hole mounting and standard 0.3-inch body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of amplifier A - accepts feedback or signal inversion path |
| 2 | 1IN+ | Non-inverting input of amplifier A - connects to reference or high-impedance sensor source |
| 3 | 1OUT | Output of amplifier A - drives load or next stage with rail-to-rail swing capability |
| 4 | VCC+ | Positive power supply - must be decoupled locally to suppress noise coupling between channels |
| 5 | 2IN+ | Non-inverting input of amplifier B - electrically isolated from other inputs but shares VCC+/VCC– rails |
| 6 | 2IN– | Inverting input of amplifier B - used for differential or inverting configurations independent of channel A |
| 7 | 2OUT | Output of amplifier B - fully independent output with same drive strength and settling as channel A |
| 8 | VCC– | Negative power supply - common return for all four amplifiers; requires low-impedance grounding |
| 9 | 3IN– | Inverting input of amplifier C - supports multi-stage filtering or parallel signal processing |
| 10 | 3IN+ | Non-inverting input of amplifier C - maintains FET-input impedance (>1 TΩ) across all channels |
| 11 | 3OUT | Output of amplifier C - identical AC/DC specs to channels A and B |
| 12 | 4IN+ | Non-inverting input of amplifier D - enables four-channel simultaneous acquisition or mixing |
| 13 | 4IN– | Inverting input of amplifier D - configurable for summing, difference, or active filtering |
| 14 | 4OUT | Output of amplifier D - completes quad functionality with matched output short-circuit protection |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables ultra-low input bias current (±1 pA typ) for high-impedance sensor interfacing and integrator stability |
| Integrated EMI/RF filters | Reduces susceptibility to switching noise in motor drives and solar inverters without external RC networks |
| Output short-circuit protection | Prevents latch-up or damage during fault conditions in battery test equipment and UPS power stages |
| Wide common-mode input range | Supports direct connection to signals referenced to VCC+ - eliminates need for level-shifting in single-supply designs |
| High ESD rating (1.5 kV HBM) | Ensures robustness during board handling and field deployment in industrial environments |
Applications
| Solar Inverter Signal Conditioning | Motor Drive Current Sensing |
|---|---|
Use Scenario: Monitoring DC-link voltage and string current in central solar inverters using shunt-based sensing and isolation amplifiers. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous signal conditioning: two channels for voltage scaling and offset correction, two for current amplification and filtering. Use Value: 20 V/μs slew rate preserves transient fidelity during rapid irradiance changes; low offset ensures <1% measurement error over –40°C to +125°C. | Use Scenario: Amplifying low-voltage shunt signals in three-phase AC servo drives for real-time current loop control. IC Role / Device Role / Timing Role: Each amplifier handles one phase's current sense path - providing gain, filtering, and level-shifting before ADC sampling. Use Value: Rail-to-rail common-mode input allows direct interface with shunts tied to high-side switches; 37 nV/√Hz noise minimizes quantization uncertainty. |
| Pro Audio Mixer Channel Strip | Battery Test Equipment Front-End |
Use Scenario: Building discrete preamp stages in analog channel strips for studio-grade microphone and line inputs. IC Role / Device Role / Timing Role: Configured as non-inverting amplifiers with selectable gain and passive EQ integration; fourth channel used for phantom power monitoring. Use Value: Low THD+N (0.00012%) preserves harmonic integrity; 125 dB open-loop gain enables precise gain accuracy with minimal resistor tolerance dependence. | Use Scenario: Precision voltage/current sourcing and measurement in automated battery formation and cycling systems. IC Role / Device Role / Timing Role: Used in programmable current sources, voltage references, and feedback comparators for closed-loop charge/discharge control. Use Value: ±2 μV/°C offset drift ensures stable calibration over thermal cycles; 5.25 MHz GBW supports fast response in dynamic load testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL084CDR | SOIC-14 package; wider offset voltage range (±3 mV max vs ±4 mV for TL084BCNG4); same AC specs and pinout | Preferred for surface-mount PCBs requiring higher production throughput and smaller footprint | Select TL084CDR when board space and reflow compatibility are prioritized over through-hole serviceability |
| TL074CP | Lower noise (18 nV/√Hz), lower quiescent current (1.4 mA/ch), but reduced slew rate (13 V/μs) and narrower common-mode range (does not include VCC+) | Better suited for low-power, low-noise audio preamps where rail-to-rail input is not required | Choose TL074CP only if noise dominates design requirements and VCC+-inclusive input is unnecessary |
Compared with TL084CDR and TL074CP, the TL084BCNG4 uniquely combines through-hole PDIP reliability, VCC+-inclusive input, and 20 V/μs slew rate - making it optimal for rugged industrial signal chains where layout flexibility and transient fidelity are critical.
Availability
TL084BCNG4 is available at Aetrix Electronics and suitable for solar energy inverters, motor drive control modules, and pro audio equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL084BCNG4 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 signal chain solutions.
The TL08xx family was engineered for cost-sensitive yet demanding applications requiring JFET-input performance, wide supply range, and robust ESD/EMI resilience - particularly in power conversion, test equipment, and professional audio.
FAQ
What is the maximum supply voltage for TL084BCNG4?
The TL084BCNG4 supports a total supply voltage (VCC+ to VCC–) of up to 40 V, or ±20 V in dual-supply configuration. Absolute maximum ratings specify 42 V for most packages, but recommended operating conditions limit continuous operation to 40 V to ensure long-term reliability and specified performance across temperature.
Does TL084BCNG4 support single-supply operation?
Yes, the TL084BCNG4 supports true single-supply operation because its common-mode input voltage range extends to VCC+. When powered from, for example, 0 V and +15 V, inputs can swing from 0 V up to +15 V - eliminating the need for level-shifting circuitry in many sensor and DAC-output interfaces.
What is the input bias current specification for TL084BCNG4?
The TL084BCNG4 exhibits an input bias current of ±1 pA typical at 25°C, with a maximum of ±120 pA across the full –40°C to +125°C range. This ultra-low value stems from its JFET-input architecture and makes it ideal for high-impedance applications such as photodiode amplifiers and precision integrators.
Can TL084BCNG4 drive capacitive loads?
Yes, the TL084BCNG4 is characterized to safely drive capacitive loads up to 300 pF while maintaining stability and specified phase margin (56°). 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.
Is TL084BCNG4 pin-compatible with other TL084 variants?
Yes, the TL084BCNG4 uses the standard 14-pin PDIP (N) package with identical pinout to all TL084x variants including TL084CN, TL084CD, and TL084CNE4. Electrical differences exist in offset, drift, and noise specs, but mechanical and functional pin mapping remains consistent across the family.
TL084BCNG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 4
- 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 (x4 Channels)
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TL084BCNG4 FAQ
1.How can I place an order for TL084BCNG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084BCNG4 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 TL084BCNG4 reliable?
The price and inventory of TL084BCNG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084BCNG4 is usually 5 days.
3.What payment methods are accepted for TL084BCNG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084BCNG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084BCNG4?
TL084BCNG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084BCNG4 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 TL084BCNG4?
For technical support, including TL084BCNG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084BCNG4 requirements.
6.How does Aetrix verify that TL084BCNG4 is sourced from the original manufacturer or authorized distributors?
All TL084BCNG4 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 TL084BCNG4 meets industry standards.
7.What is the process for return or replacement of TL084BCNG4?
All TL084BCNG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL084BCNG4, 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 TL084BCNG4 part is unused and in its original packaging.
Return procedure for TL084BCNG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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