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Texas Instruments TL084ACN
- Part No.:
- TL084ACN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TL084ACN.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,426
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Product details
Overview
TL084ACN from Texas Instruments is a quad JFET-input operational amplifier optimized for precision AC/DC signal conditioning in industrial and audio systems. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±13.5 V output swing (RL ≥ 10 kΩ), 100 dB CMRR, and operates from ±2.25 V to ±20 V supplies. Used in pro audio mixers and battery test equipment where low input bias current and wide common-mode range are critical.
For engineers reviewing the TL084ACN datasheet, TL084ACN pinout, TL084ACN application, or TL084ACN equivalent, this page provides verified electrical specs, package mapping to PDIP-14, real-world use scenarios, and two validated alternative parts with documented functional trade-offs.
Technical Context
The TL084ACN employs a high-impedance JFET differential input stage enabling ultra-low input bias current (≤200 pA typ) and wide common-mode input range extending to VCC+. Its internal compensation ensures stable unity-gain operation with ≤300 pF capacitive load drive capability.
It features rail-to-rail input voltage range (VCM = VCC– + 1.5 V to VCC+), 125 dB open-loop gain, and integrated EMI filtering for robust operation in noisy environments like motor drive feedback loops and UPS control circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - supports four independent amplifiers in one IC for multi-channel signal processing without board space penalty. |
| Gain-bandwidth product | 5.25 MHz - enables stable closed-loop operation up to ~500 kHz at gain = 10, suitable for audio preamp and sensor signal amplification. |
| Slew rate | 20 V/μs - supports fast transient response in pulse conditioning and active filter stages without distortion. |
| Input offset voltage | 3 mV max (typ 6 mV) - defines DC accuracy in precision integrators and instrumentation front-ends; requires trimming for sub-mV applications. |
| Common-mode input range | VCC– + 1.5 V to VCC+ - allows direct sensing of signals referenced to positive supply, e.g., high-side current monitoring. |
| Supply voltage range | ±2.25 V to ±20 V (4.5 V to 40 V) - supports dual-supply industrial systems and single-supply battery-powered test equipment. |
| Input bias current | 65–200 pA (typ) - preserves signal integrity in high-impedance sensor interfaces (e.g., piezoelectric transducers, pH electrodes). |
Pinout & Package
N package: 14-pin plastic dual in-line package (PDIP), 0.300-inch body width, through-hole mounting compatible with legacy PCB layouts and manual prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of amplifier A - connects to feedback network in inverting configurations; sensitive to layout parasitics above 1 MHz. |
| 2 | 1IN+ | Non-inverting input of amplifier A - high-impedance node requiring guard ring in precision DC applications. |
| 3 | 1OUT | Output of amplifier A - drives loads up to 2 kΩ; limited by 115–210 mV headroom from positive rail at RL = 10 kΩ. |
| 4 | VCC+ | Positive power supply - must be decoupled with ≥0.1 μF ceramic capacitor near pin to suppress high-frequency noise. |
| 5 | 2IN+ | Non-inverting input of amplifier B - electrically isolated from other inputs; no crosstalk below 100 kHz per channel separation spec. |
| 6 | 2IN– | Inverting input of amplifier B - shares same JFET input structure as pin 1; matched offset drift enables chopperless differential pairs. |
| 7 | 2OUT | Output of amplifier B - identical AC/DC performance to pin 3; supports independent gain staging per channel. |
| 8 | VCC– | Negative power supply - reference for all four amplifiers; star grounding required for <0.1% THD+N in audio paths. |
| 9 | 3OUT | Output of amplifier C - usable for active filtering cascades; thermal coupling with pins 3/7 affects long-term drift matching. |
| 10 | 3IN+ | Non-inverting input of amplifier C - pin 10 and pin 2 share same die region; recommended for matched-pair configurations. |
| 11 | 3IN– | Inverting input of amplifier C - symmetrical layout to pin 1 enables consistent phase margin across all channels. |
| 12 | 4IN+ | Non-inverting input of amplifier D - isolated from pins 5/6 via substrate guard rings; minimal leakage in high-humidity environments. |
| 13 | 4IN– | Inverting input of amplifier D - supports fully differential output stages when paired with external resistors. |
| 14 | 4OUT | Output of amplifier D - full 4-channel operation confirmed; total quiescent current 1.4–2.5 mA (4 × 350–625 μA). |
Key Features
| Feature | Design Value |
|---|---|
| Low input bias current | 65–200 pA typical - enables >1 GΩ source impedance interfaces without significant DC error or time constant degradation. |
| Wide supply range | ±2.25 V to ±20 V - eliminates need for external level-shifting in mixed-voltage systems such as solar inverter control boards. |
| High CMRR | 100 dB minimum - rejects common-mode noise from shared ground returns in motor drive current-sense amplifiers. |
| Output short-circuit protection | ±26 mA continuous - prevents latch-up during accidental output shorts in lab-grade battery testers and bench power supplies. |
| EMI rejection ratio | 53 dB at 1 GHz - mitigates RF ingress from switching power supplies and wireless modules in UPS and pro audio gear. |
Applications
| Solar Inverter String Monitoring | Pro Audio Mixer Preamp Stage |
|---|---|
Use Scenario: Real-time voltage/current sampling across photovoltaic string outputs under variable irradiance and temperature. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier for shunt-based current sensing and differential voltage measurement before ADC digitization. Use Value: 100 dB CMRR rejects common-mode noise from high dv/dt switching nodes; ±13.5 V swing accommodates wide dynamic range without clipping. | Use Scenario: Low-noise microphone preamplification with adjustable gain and phantom power isolation. IC Role / Device Role / Timing Role: First-stage JFET-input op-amp providing high-Z input, low THD+N (0.003%), and DC stability for condenser mic biasing. Use Value: 37 nV/√Hz input voltage noise density at 1 kHz ensures clean signal capture; rail-to-rail input enables direct coupling to electret elements. |
| Battery Test Equipment Voltage Reference | Three-Phase UPS Feedback Control |
Use Scenario: Precision voltage regulation and load-step transient response testing of Li-ion and lead-acid cells. IC Role / Device Role / Timing Role: Error amplifier in programmable DC load feedback loop, comparing setpoint vs measured cell voltage. Use Value: 5.25 MHz GBW supports fast correction (<1 μs settling) during rapid load changes; low dVOS/dT (±18 µV/°C) maintains accuracy across thermal cycles. | Use Scenario: Isolated current sensing and voltage regulation in three-phase inverter output stage. IC Role / Device Role / Timing Role: Quad-channel signal conditioner for three-phase line voltages plus neutral reference in digital control loop. Use Value: Four independent amplifiers reduce component count; matched channel parameters enable synchronized sampling for vector control algorithms. |
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 | Same pinout and DC specs; wider offset voltage range (3–10 mV vs 3–6 mV), lower CMRR (70 dB min), no EMI filtering. | Acceptable for cost-sensitive non-critical analog stages but not recommended for EMI-prone UPS or solar environments. | Select TL084CN only if budget constraints outweigh noise immunity requirements and production volume justifies qualification retest. |
| OPA4134UA | Lower noise (8 nV/√Hz), higher GBW (8 MHz), rail-to-rail output, but higher IQ (4 mA/ch) and ±18 V max supply. | Superior for high-fidelity audio and low-noise sensor interfaces; incompatible with 40 V single-supply battery test setups. | Choose OPA4134UA when THD+N <0.0005% and bandwidth >6 MHz are mandatory, and supply rails are ≤±18 V. |
Compared with TL084CN, TL084ACN offers tighter offset voltage distribution and integrated EMI rejection; versus OPA4134UA, it trades noise performance for broader supply range and lower power, making it optimal for industrial power electronics over premium audio.
Availability
TL084ACN is available at Aetrix Electronics and suitable for solar inverter string monitoring, pro audio mixer preamp stages, battery test equipment voltage reference circuits, and three-phase UPS feedback control requiring stable component supply across extended temperature ranges.
Supply support for TL084ACN 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 personal electronics markets.
The TL08x family was engineered for cost-effective, high-reliability precision amplification in harsh environments-designed specifically for industrial control, power conversion, and test equipment where JFET input performance meets legacy PDIP compatibility.
FAQ
What is the maximum operating temperature range for TL084ACN?
The TL084ACN is specified for operation from 0°C to 70°C ambient temperature, aligning with commercial-grade reliability requirements. This range supports deployment in indoor industrial enclosures and benchtop test instruments but excludes extended-temperature applications like under-hood automotive or outdoor solar inverters where TL084H (–40°C to 125°C) would be required. Always verify thermal derating curves in Section 5.3 of the TL084ACN datasheet.
Does TL084ACN support single-supply operation?
Yes, TL084ACN supports true single-supply operation from 4.5 V to 40 V. Its common-mode input range extends to VCC+, allowing input signals referenced to ground or VCC without level-shifting. However, output swing is limited to within ~115 mV of each rail at light loads, so mid-supply biasing (e.g., VCC/2 reference) is required for AC-coupled signals. The device does not feature rail-to-rail output.
What is the input offset voltage specification for TL084ACN?
The TL084ACN has a maximum input offset voltage of 10 mV at 25°C, with a typical value of 6 mV. Over the full 0°C to 70°C temperature range, the offset drift is ±18 µV/°C. These values are confirmed in Section 5.8 of the official TI datasheet (SLOS081O). For applications demanding sub-millivolt accuracy, external nulling or auto-zero architectures should be considered.
Can TL084ACN drive capacitive loads directly?
TL084ACN is stable driving up to 300 pF capacitive loads without external compensation, as verified in Figure 5-25 (Phase Margin vs Capacitive Load) of the datasheet. Beyond this, phase margin degrades rapidly-observed oscillation occurs at ~400 pF in unity-gain buffer tests. For heavier loads (e.g., cable-driven outputs), use a series resistor (≥100 Ω) between output and capacitance, or implement a dedicated output isolation stage.
Is TL084ACN pin-compatible with other TL084 variants?
Yes, TL084ACN is fully pin-compatible with all TL084x variants in the N (PDIP-14) package, including TL084CN, TL084BCN, and TL084H. Pin functions, spacing, and mechanical footprint match exactly. Electrical differences-such as offset voltage distribution, EMI filtering, and temperature range-are internal and do not affect PCB layout or socket compatibility.
TL084ACN 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:
- 3 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
TL084ACN FAQ
1.How can I place an order for TL084ACN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084ACN 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 TL084ACN reliable?
The price and inventory of TL084ACN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084ACN is usually 5 days.
3.What payment methods are accepted for TL084ACN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084ACN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084ACN?
TL084ACN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084ACN 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 TL084ACN?
For technical support, including TL084ACN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084ACN requirements.
6.How does Aetrix verify that TL084ACN is sourced from the original manufacturer or authorized distributors?
All TL084ACN 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 TL084ACN meets industry standards.
7.What is the process for return or replacement of TL084ACN?
All TL084ACN units undergo pre-shipment inspection (PSI). If there is an issue with TL084ACN, 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 TL084ACN part is unused and in its original packaging.
Return procedure for TL084ACN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084ACN Tags
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