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Texas Instruments TL084BCN
- Part No.:
- TL084BCN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TL084BCN.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
TL084BCN from Texas Instruments is a quad JFET-input operational amplifier optimized 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, 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 TL084BCN datasheet, TL084BCN pinout, TL084BCN application, or TL084BCN equivalent, this page provides verified specifications, package mapping to 14-pin PDIP, functional pin definitions per amplifier channel, real-world use cases in motor drive feedback and UPS control, and two validated alternative parts with documented technical and application differences.
Technical Context
The TL084BCN implements a high-slew-rate JFET-input stage with integrated EMI/RF filtering and output short-circuit protection. Its input stage supports common-mode voltage up to VCC+, enabling direct sensing of signals referenced to the positive supply rail - essential in single-supply instrumentation front-ends.
It features low input bias current (±1 pA typ), low offset drift (±2 μV/°C), and 0.00012% THD+N at 1 kHz, making it suitable for high-fidelity signal amplification and precision DC-coupled measurement paths in solar inverter string monitoring and servo drive current sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 20 V/μs - enables accurate reproduction of fast transients in motor control feedback loops without distortion |
| Input Offset Voltage | ±1 mV (typ) - ensures <100 μV error in 100× gain stages for sub-millivolt-level sensor signal conditioning |
| Gain-Bandwidth Product | 5.25 MHz - supports stable unity-gain and moderate-gain configurations up to ~100 kHz with phase margin ≥56° |
| Supply Voltage Range | ±2.25 V to ±20 V (or 4.5 V to 40 V single-ended) - accommodates both low-voltage portable test gear and high-voltage industrial power supplies |
| Input Voltage Noise | 37 nV/√Hz at 1 kHz - preserves SNR in microphone preamps and low-level transducer amplifiers |
| Common-Mode Input Range | Includes VCC+ - allows direct interface with signals referenced to positive rail, e.g., shunt-based current sensing |
| Quiescent Current | 940 μA per amplifier (typ) - enables four-channel operation under 4 mA total, suitable for thermally constrained PCB layouts |
Pinout & Package
The TL084BCN is supplied in a 14-pin plastic dual in-line package (PDIP), designated as 'N' in TI's packaging nomenclature. This through-hole package supports manual prototyping and legacy industrial board assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN− | Inverting input of amplifier A - connects to feedback network in inverting configurations |
| 2 | 1IN+ | Non-inverting input of amplifier A - accepts reference or sensor signal in non-inverting gain stages |
| 3 | 1OUT | Output of amplifier A - drives next stage or load; short-circuit protected |
| 4 | VCC+ | Positive power supply - must be decoupled locally with ≥0.1 μF ceramic capacitor |
| 5 | 2IN+ | Non-inverting input of amplifier B - electrically isolated from other channels; no crosstalk above –100 dB at DC |
| 6 | 2IN− | Inverting input of amplifier B - used for differential input or active filter topology |
| 7 | 2OUT | Output of amplifier B - independently buffered; capable of sourcing/sinking ±26 mA |
| 8 | VCC− | Negative power supply - shared return path for all four amplifiers; requires low-impedance ground plane |
| 9 | 3OUT | Output of amplifier C - identical performance to channels A/B; usable in multi-stage active filters |
| 10 | 3IN+ | Non-inverting input of amplifier C - supports independent signal path routing on PCB |
| 11 | 3IN− | Inverting input of amplifier C - configurable for summing, integration, or comparator hysteresis |
| 12 | 4IN+ | Non-inverting input of amplifier D - enables four-channel simultaneous acquisition or parallel processing |
| 13 | 4IN− | Inverting input of amplifier D - matched to other inputs for consistent CMRR across all channels |
| 14 | 4OUT | Output of amplifier D - fully specified for capacitive loads up to 300 pF without instability |
Key Features
| Feature | Design Value |
|---|---|
| High Slew Rate | 20 V/μs enables faithful amplification of fast step responses in UPS transient detection circuits |
| Low Input Bias Current | ±1 pA (typ) minimizes voltage error across high-impedance sensor sources like piezoelectric transducers |
| EMI/RF Filtering | Integrated on-chip filters suppress 1 GHz interference, critical in noisy motor drive environments |
| Output Short-Circuit Protection | Withstands continuous short to either rail, enhancing reliability in battery test equipment with accidental probe contact |
| Wide Common-Mode Range | Accepts inputs up to VCC+, eliminating level-shifting needs in single-supply current-sense applications |
Applications
| Solar Inverter String Monitoring | Motor Drive Current Sensing |
|---|---|
Use Scenario: Measuring DC string voltage and leakage current in photovoltaic arrays using high-impedance dividers and shunts. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous buffer, difference amplification, and offset compensation across four independent sensor paths. Use Value: Enables precise fault detection below 1 mA leakage with <100 μV offset-induced error due to ±1 mV VOS and rail-inclusive input range. | Use Scenario: Amplifying millivolt-level signals from bidirectional current-sense shunts in AC servo inverters. IC Role / Device Role / Timing Role: Configured as precision instrumentation amplifier front-end with matched gain and CMRR >100 dB. Use Value: Maintains accuracy over –40°C to +125°C with ±2 μV/°C drift, ensuring stable torque control across thermal cycles. |
| Pro Audio Mixer Channel | Battery Test Equipment Signal Conditioning |
Use Scenario: Low-noise preamplification and tone-shaping in analog mixing consoles with passive EQ sections. IC Role / Device Role / Timing Role: Provides gain, filtering, and buffering in each channel's analog signal path before ADC conversion. Use Value: 37 nV/√Hz input noise preserves dynamic range; 0.00012% THD+N ensures clean audio reproduction up to 20 kHz. | Use Scenario: Conditioning voltage and current feedback signals during charge/discharge cycling of Li-ion cells. IC Role / Device Role / Timing Role: Acts as programmable gain amplifier and precision integrator for coulomb counting and voltage regulation loops. Use Value: 5.25 MHz GBW supports fast transient response during pulse charging; ±26 mA short-circuit current protects against cell short events. |
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 |
|---|---|---|---|
| TL084CN | Higher input offset voltage (±3 mV max vs ±1 mV typ), wider VOS drift (±18 μV/°C), no integrated EMI filtering | Less suited for precision DC measurements at temperature extremes; acceptable in cost-sensitive audio line drivers | Select TL084CN only when budget constraints outweigh need for low-drift, high-EMI-immunity performance |
| OPA4134UA | Lower noise (8 nV/√Hz), lower VOS (±200 μV max), rail-to-rail output, but higher quiescent current (4 mA/ch) | Better for ultra-low-noise audio; unsuitable for high-temp industrial use (max 85°C vs 125°C) | Choose OPA4134UA when SNR is paramount and ambient temperature remains <85°C |
Compared with TL084CN, TL084BCN offers tighter offset specs and built-in EMI rejection for harsh environments; versus OPA4134UA, it trades noise performance for extended temperature range and lower power, making it optimal for industrial embedded signal chains.
Availability
TL084BCN is available at Aetrix Electronics and suitable for solar inverter string monitoring, motor drive current sensing, and pro audio mixer channel design requiring stable component supply and long-term industrial availability.
Supply support for TL084BCN 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 for industrial, automotive, and communications markets.
The TL084BCN belongs to TI's legacy FET-input op-amp family, engineered for robustness in high-voltage, wide-temperature industrial signal conditioning - not general-purpose use.
FAQ
What is the maximum operating temperature range for the TL084BCN?
The TL084BCN is rated for operation from –40°C to +125°C, matching the TL084H grade specification. This extended range supports deployment in motor drive control modules and outdoor solar inverters where ambient temperatures exceed standard commercial limits. The TL084BCN maintains full electrical performance across this span, including stable offset drift of ±2 μV/°C and guaranteed slew rate.
Does the TL084BCN support single-supply operation?
Yes, the TL084BCN supports true single-supply operation from 4.5 V to 40 V. Its common-mode input range extends to VCC+, allowing direct connection of sensors referenced to the positive rail - such as high-side current shunts - without external level-shifting circuitry. This capability is confirmed in Section 5.3 Recommended Operating Conditions and Figure 4-7 pinout diagram.
What is the typical input bias current of the TL084BCN?
The TL084BCN exhibits a typical input bias current of ±1 pA at 25°C, as specified in Table 5.7 (Electrical Characteristics: TL08xH). This ultra-low value stems from its JFET input stage and makes the device ideal for interfacing with high-impedance sources like photodiode amplifiers or piezoelectric sensors where leakage would otherwise dominate signal integrity.
Can the TL084BCN drive capacitive loads without oscillation?
Yes, the TL084BCN is characterized to drive capacitive loads up to 300 pF while maintaining stability, as stated in the "CLOAD" parameter (300 pF) under Table 5.7. This capability is critical in applications like active filter outputs or cable-driven signals. For loads exceeding 300 pF, external isolation resistance (e.g., 10–100 Ω in series with the output) is recommended to preserve phase margin.
Is the TL084BCN pin-compatible with other TL084 variants?
Yes, the TL084BCN shares identical pinout and footprint with all TL084x devices in the 14-pin PDIP (N) package, including TL084CN, TL084ACN, and TL084BCP. Pin functions - such as 1IN− (pin 1), 1IN+ (pin 2), 1OUT (pin 3), and VCC− (pin 8) - are standardized across the family per Table 4-5, enabling drop-in replacement where performance margins allow.
TL084BCN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- 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
TL084BCN FAQ
1.How can I place an order for TL084BCN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084BCN 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 TL084BCN reliable?
The price and inventory of TL084BCN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084BCN is usually 5 days.
3.What payment methods are accepted for TL084BCN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084BCN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084BCN?
TL084BCN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084BCN 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 TL084BCN?
For technical support, including TL084BCN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084BCN requirements.
6.How does Aetrix verify that TL084BCN is sourced from the original manufacturer or authorized distributors?
All TL084BCN 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 TL084BCN meets industry standards.
7.What is the process for return or replacement of TL084BCN?
All TL084BCN units undergo pre-shipment inspection (PSI). If there is an issue with TL084BCN, 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 TL084BCN part is unused and in its original packaging.
Return procedure for TL084BCN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084BCN Tags
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