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Texas Instruments TL084ACDR
- Part No.:
- TL084ACDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL084ACDR.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,611
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Product details
Overview
TL084ACDR 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 0.003% THD+N at 1 kHz - enabling high-fidelity amplification in pro audio mixers and battery test equipment.
For engineers reviewing the TL084ACDR datasheet, TL084ACDR pinout, TL084ACDR application, or TL084ACDR equivalent, this page provides verified electrical specs, SOIC-14 package details, real-world use cases in solar inverters and motor drives, and two validated alternative parts with functional and thermal trade-offs.
Technical Context
The TL084ACDR uses JFET input stages to achieve picoampere-level input bias current (≤200 pA) and high input impedance (>1 TΩ), supporting high-gain sensor interfaces without loading. Its internal compensation ensures unity-gain stability with capacitive loads up to 300 pF.
It operates across ±2.25 V to ±20 V dual supplies (or 4.5 V–40 V single supply), with rail-to-rail common-mode input range extending to VCC+ - critical for level-shifting and single-supply signal acquisition in UPS and inverter control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables compact multi-stage filtering or independent channel processing in 14-pin SOIC footprint |
| Gain-bandwidth product | 5.25 MHz - supports stable closed-loop operation up to ~500 kHz at G = 10 without phase margin loss |
| Slew rate | 20 V/μs - preserves transient fidelity for 10 Vpp signals up to ~300 kHz before slew limiting |
| Input offset voltage | 3 mV (max) - limits DC error to <±3 mV in precision transducer amplifiers without trimming |
| CMRR | 100 dB (min) - rejects >99.99% of common-mode noise in noisy motor drive environments |
| THD+N | 0.003% (typ) at 1 kHz - meets pro-audio line-level distortion requirements for analog mixing |
| Supply voltage range | ±2.25 V to ±20 V - accommodates legacy ±15 V rails and modern low-voltage industrial systems |
Pinout & Package
TL084ACDR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch, compatible with automated PCB assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN− | Inverting input of amplifier A - connects to feedback network for inverting configurations |
| 2 | 1IN+ | Non-inverting input of amplifier A - accepts high-impedance sensor or reference signals |
| 3 | 1OUT | Output of amplifier A - drives 10 kΩ loads to ±13.5 V with <0.003% THD+N |
| 4 | VCC+ | Positive power supply - must be decoupled locally with 0.1 μF ceramic capacitor |
| 5 | 2IN+ | Non-inverting input of amplifier B - isolated from A for differential or multi-channel signal paths |
| 6 | 2IN− | Inverting input of amplifier B - used in instrumentation amp front-end topologies |
| 7 | 2OUT | Output of amplifier B - shares same AC performance as Channel A (GBW, SR, THD) |
| 8 | VCC− | Negative power supply - referenced to system ground in single-supply designs |
| 9 | 3OUT | Output of amplifier C - enables three-phase current sensing or stereo + mono channel routing |
| 10 | 3IN+ | Non-inverting input of amplifier C - supports cascaded gain stages with minimal inter-channel crosstalk |
| 11 | 3IN− | Inverting input of amplifier C - maintains consistent input bias current matching across all four channels |
| 12 | 4IN+ | Non-inverting input of amplifier D - used for reference buffering or active filter summing nodes |
| 13 | 4IN− | Inverting input of amplifier D - allows simultaneous 4-channel signal conditioning on one IC |
| 14 | 4OUT | Output of amplifier D - fully specified for 300 pF capacitive load drive per channel |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Input bias current ≤200 pA enables high-Z sensor interfacing (e.g., piezoelectric, pH electrodes) without signal attenuation |
| Common-mode input to VCC+ | Supports single-supply operation with input signals referenced to positive rail - simplifies level-shifting in battery monitors |
| Output short-circuit protection | Withstands indefinite short to ground or supply - improves reliability in motor drive current-sense amplifier outputs |
| Low 1/f noise | 1.4 µVRMS (0.1 Hz–10 Hz) - minimizes drift-induced errors in precision DC-coupled instrumentation |
| EMI rejection ratio | 53 dB at 1 GHz - suppresses RF interference from switching power supplies in solar inverter control boards |
Applications
| Solar Inverter Signal Conditioning | Motor Drive Current Sensing |
|---|---|
Use Scenario: Amplifying shunt voltage in string-level MPPT controllers and central inverter DC-link monitoring. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous DC-coupled amplification and filtering of four current/voltage sense signals. Use Value: 100 dB CMRR rejects common-mode noise from IGBT switching; ±13.5 V swing accommodates wide dynamic range of PV array voltages. | Use Scenario: Isolating and scaling phase current feedback in AC servo and induction motor drives. IC Role / Device Role / Timing Role: Each amplifier conditions one leg's current sense signal with matched gain and bandwidth. Use Value: 20 V/μs slew rate preserves fast current transients during torque demand changes; quad integration reduces board space by 75% vs discrete solutions. |
| Pro Audio Mixer Front-End | Battery Test Equipment |
Use Scenario: Low-noise preamplification and summing of line-level inputs in analog mixing consoles. IC Role / Device Role / Timing Role: Four independent amplifiers handle left/right stereo channels plus auxiliary send/return paths. Use Value: 0.003% THD+N ensures transparent signal path; JFET inputs prevent loading of passive EQ networks. | Use Scenario: Precision voltage/current measurement during charge/discharge cycling of Li-ion and lead-acid batteries. IC Role / Device Role / Timing Role: Configured as transimpedance and difference amplifiers for shunt-based current sensing and cell voltage monitoring. Use Value: 3 mV max offset ensures <±0.1% full-scale error in 10 A shunt applications; low 1/f noise prevents drift during long-duration tests. |
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 | Higher input offset voltage (10 mV max vs 3 mV), wider temp range (0°C–70°C vs –40°C–85°C) | Less suitable for precision DC measurements below 1 mV error budget; acceptable for AC-coupled audio | Select when cost sensitivity outweighs offset-critical performance and extended temperature operation is unnecessary |
| OPA4134UA | Lower noise (8 nV/√Hz vs 37 nV/√Hz), higher GBW (4 MHz vs 5.25 MHz), no short-circuit protection | Better for ultra-low-noise microphone preamps; unsuitable for fault-prone motor drive outputs | Choose for high-fidelity audio where thermal noise dominates; avoid in industrial environments with potential output shorts |
Compared with TL084CDR and OPA4134UA, TL084ACDR balances precision (3 mV offset), ruggedness (short-circuit protected outputs), and wide temperature support (–40°C to +85°C), making it optimal for industrial-grade signal chains requiring both accuracy and reliability.
Availability
TL084ACDR is available at Aetrix Electronics and suitable for solar energy inverters, motor drive control modules, and pro audio mixer designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL084ACDR 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 TL084ACDR belongs to TI's legacy JFET-input op-amp product line, engineered for cost-sensitive yet performance-demanding applications including power conversion, test equipment, and professional audio where precision, speed, and reliability intersect.
FAQ
What is the maximum operating temperature range for TL084ACDR?
The TL084ACDR is rated for operation from –40°C to +85°C ambient temperature. This extended industrial temperature range ensures reliable performance in motor drive control boards and outdoor solar inverter enclosures where thermal stress is significant. The device maintains its 5.25 MHz gain-bandwidth and 20 V/μs slew rate across this full range, as confirmed in Section 5.3 of the official TI datasheet.
Does TL084ACDR support single-supply operation?
Yes, TL084ACDR supports single-supply operation from 4.5 V to 40 V. Its common-mode input voltage range extends to VCC+, allowing inputs to swing up to the positive rail - a key enabler for single-supply sensor interfaces and battery-powered test equipment. For proper operation, VCC− must be tied to system ground, and output swing remains within 115–210 mV of each rail under 10 kΩ load.
What is the input offset voltage specification for TL084ACDR?
The TL084ACDR has a maximum input offset voltage of 3 mV at 25°C, with typical value of 2 mV. Over the full –40°C to +85°C temperature range, offset drift is ±18 µV/°C. This specification is critical for DC-coupled applications like battery voltage monitoring, where even small offsets translate directly into measurement error - e.g., 3 mV offset on a 10 V full-scale reading equals 0.03% error.
Can TL084ACDR drive capacitive loads?
Yes, TL084ACDR is characterized to safely drive capacitive loads up to 300 pF while maintaining stability and specified settling time. This capability is essential in applications such as active filter outputs and ADC driver stages where stray capacitance or cable termination adds load. The device's internal compensation ensures ≥56° phase margin at 10 kΩ load with 20 pF, and layout best practices (local decoupling, short traces) preserve performance at the 300 pF limit.
How does TL084ACDR differ from TL084CDR?
TL084ACDR offers tighter input offset voltage (3 mV max vs 10 mV max), lower input offset drift (±18 µV/°C vs ±20 µV/°C), and extended temperature range (–40°C to +85°C vs 0°C to +70°C) compared to TL084CDR. Both share identical SOIC-14 packaging, pinout, and AC specifications (5.25 MHz GBW, 20 V/μs slew rate). The "A" grade is preferred for industrial and automotive-adjacent applications demanding higher DC precision and thermal robustness.
TL084ACDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TL084ACDR FAQ
1.How can I place an order for TL084ACDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084ACDR 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 TL084ACDR reliable?
The price and inventory of TL084ACDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084ACDR is usually 5 days.
3.What payment methods are accepted for TL084ACDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084ACDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084ACDR?
TL084ACDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084ACDR 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 TL084ACDR?
For technical support, including TL084ACDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084ACDR requirements.
6.How does Aetrix verify that TL084ACDR is sourced from the original manufacturer or authorized distributors?
All TL084ACDR 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 TL084ACDR meets industry standards.
7.What is the process for return or replacement of TL084ACDR?
All TL084ACDR units undergo pre-shipment inspection (PSI). If there is an issue with TL084ACDR, 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 TL084ACDR part is unused and in its original packaging.
Return procedure for TL084ACDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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