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Texas Instruments TL084CDG4
- Part No.:
- TL084CDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL084CDG4.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
TL084CDG4 from Texas Instruments is a quad JFET-input operational amplifier designed for precision analog signal conditioning in industrial and instrumentation systems. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±15 V supply operation, low 3 mV max input offset voltage (at 25°C), and rail-to-rail common-mode input range extending to VCC+. Used in pro audio mixers and battery test equipment where low noise and high CMRR are critical.
For engineers reviewing the TL084CDG4 datasheet, TL084CDG4 pinout, TL084CDG4 application, or TL084CDG4 equivalent, this page provides verified electrical specifications, SOIC-14 package details, functional pin mapping, real-world use cases, and two validated alternative parts with documented technical and application differences.
Technical Context
The TL084CDG4 implements a high-slew-rate JFET-input stage with internal frequency compensation, enabling stable unity-gain operation. Its input stage supports common-mode voltages up to VCC+, eliminating need for level-shifting in single-supply configurations.
It features output short-circuit protection, integrated EMI/RF filters, and operates across 0°C to 70°C ambient temperature. Quiescent current per amplifier is 1.4–2.5 mA at ±15 V, supporting moderate-power analog front-ends without thermal derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables four independent amplification paths on one die, reducing PCB area vs discrete op-amps. |
| Gain-bandwidth product | 5.25 MHz - supports stable closed-loop operation up to ~500 kHz at gain = 10. |
| Slew rate | 20 V/μs - ensures faithful reproduction of fast transients in audio and test equipment signals. |
| Input offset voltage (max) | 10 mV at 25°C - defines worst-case DC error in precision DC-coupled gain stages. |
| Common-mode input range | VCC– to VCC+ - allows direct sensing of signals referenced to positive rail, e.g., current-sense in high-side configurations. |
| Supply voltage range | ±2.25 V to ±20 V (or 4.5 V to 40 V single-ended) - compatible with legacy ±15 V rails and modern wide-range supplies. |
| Input bias current (max) | 200 pA - minimizes voltage error across high-impedance sources like piezoelectric sensors or photodiode TIA feedback networks. |
Pinout & Package
TL084CDG4 is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) package, surface-mount, 3.9 mm body width, standard JEDEC MS-012 footprint.
| 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 - used for reference voltage injection or sensor interface. |
| 3 | 1OUT | Output of amplifier A - drives next stage or load; rated for ±26 mA short-circuit current. |
| 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 inputs; no crosstalk beyond spec'd channel separation. |
| 6 | 2IN– | Inverting input of amplifier B - shares same JFET input structure as pins 1 and 3, ensuring matched characteristics. |
| 7 | 2OUT | Output of amplifier B - independently buffered; supports simultaneous dual-channel signal processing. |
| 8 | VCC– | Negative power supply - return path for dual-supply operation; tied to ground in single-supply designs. |
| 9 | 3OUT | Output of amplifier C - identical AC/DC specs to pins 3 and 7; usable for multi-stage filtering or summing. |
| 10 | 3IN+ | Non-inverting input of amplifier C - pin-compatible with industry-standard TL084 layout conventions. |
| 11 | 3IN– | Inverting input of amplifier C - maintains >95 dB CMRR across –40°C to +85°C operating range. |
| 12 | 4IN+ | Non-inverting input of amplifier D - enables four-channel instrumentation front-end without additional ICs. |
| 13 | 4IN– | Inverting input of amplifier D - supports differential input configuration when paired with pin 12 and external resistors. |
| 14 | 4OUT | Output of amplifier D - fully specified for capacitive loads up to 300 pF; stable with 20 pF CL. |
Key Features
| Feature | Design Value |
|---|---|
| Low input bias current | ≤200 pA max - preserves signal integrity in high-Z sensor interfaces (e.g., pH electrodes, piezo elements). |
| High slew rate | 20 V/μs - enables accurate amplification of fast-rising pulses in battery impedance testing waveforms. |
| Wide supply range | ±2.25 V to ±20 V - eliminates need for separate LDOs when interfacing with mixed-voltage subsystems. |
| Output short-circuit protection | ±26 mA continuous - prevents latch-up or destruction during accidental output shorts in lab equipment. |
| EMI/RF rejection | 53 dB at 1 GHz - suppresses cellular/WiFi interference in sensitive measurement circuits near noisy digital processors. |
Applications
| Solar Inverter Monitoring | Motor Drive Signal Conditioning |
|---|---|
Use Scenario: Real-time DC-link voltage and current sensing in string inverters for MPPT control. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous isolation-amplifier buffering, current shunt amplification, and voltage scaling prior to ADC sampling. Use Value: Enables <1% full-scale error across –25°C to +60°C ambient using matched JFET inputs and 5.25 MHz bandwidth for fast transient capture. | Use Scenario: Analog signal preprocessing in AC servo drive feedback loops (encoder interpolation, resolver excitation). IC Role / Device Role / Timing Role: TL084CDG4 configures as active filter, differential receiver, and level shifter for position sensor outputs before FPGA capture. Use Value: 20 V/μs slew rate ensures <100 ns propagation delay variation across 0–10 V input steps, preserving encoder timing accuracy. |
| Pro Audio Mixer Channel Strip | Battery Test Equipment Front-End |
Use Scenario: Low-noise preamplification and tone control in 16-channel analog mixing console. IC Role / Device Role / Timing Role: Each TL084CDG4 handles one channel's mic preamp gain stage, EQ integration, and line driver buffer. Use Value: 37 nV/√Hz input voltage noise at 1 kHz ensures >110 dB SNR in 20 Hz–20 kHz audio band with 60 dB gain. | Use Scenario: Precision voltage/current sourcing and sensing during electrochemical impedance spectroscopy (EIS) on Li-ion cells. IC Role / Device Role / Timing Role: Configured as transimpedance amplifier for current measurement and difference amplifier for cell voltage monitoring. Use Value: ≤10 mV input offset and 0.003% THD+N enable sub-mV DC accuracy and distortion-free AC stimulus generation at 1 kHz. |
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 |
|---|---|---|---|
| TL084IDR | Wider temperature range (–40°C to +85°C vs 0°C to +70°C); otherwise identical SOIC-14 pinout and electrical specs. | Required for industrial environments exceeding 70°C ambient, e.g., motor drive cabinets or outdoor solar enclosures. | Select TL084IDR when extended temperature qualification is mandatory; TL084CDG4 remains optimal for cost-sensitive commercial-grade audio/test gear. |
| OPA4134UA | Lower input offset (150 μV typ), lower noise (8 nV/√Hz), higher GBW (4 MHz), but higher quiescent current (4 mA/ch) and no short-circuit protection. | Suitable for ultra-low-distortion audio or metrology, but not for ruggedized test equipment requiring fault tolerance. | Choose OPA4134UA only when noise and offset dominate design requirements and robustness is secondary. |
Compared with TL084IDR and OPA4134UA, TL084CDG4 offers the best balance of cost, ruggedness (short-circuit protection), and performance for commercial-grade instrumentation-delivering 20 V/μs slew rate and 5.25 MHz bandwidth without premium pricing or thermal overhead.
Availability
TL084CDG4 is available at Aetrix Electronics and suitable for solar inverter monitoring, motor drive signal conditioning, and pro audio mixer channel strips requiring stable component supply and long-term manufacturability.
Supply support for TL084CDG4 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TL084 family was engineered for cost-sensitive precision analog applications demanding JFET input performance, wide supply range, and proven reliability-targeting instrumentation, audio, and power conversion systems.
FAQ
What is the maximum operating temperature for TL084CDG4?
The TL084CDG4 is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade specification makes it suitable for indoor test equipment, audio consoles, and non-extended-temperature industrial controls. For applications requiring –40°C to +85°C operation, TI offers the TL084IDR variant, which shares identical pinout and electrical behavior except for temperature grading.
Does TL084CDG4 support single-supply operation?
Yes, TL084CDG4 supports true single-supply operation with common-mode input range extending to VCC+. When powered from +15 V and GND, inputs can swing from 0 V to +15 V. Output swing is rail-limited: typically within 210 mV of VCC+ and 215 mV of GND at RL = 10 kΩ. Biasing input common-mode voltage near mid-supply (e.g., +7.5 V) maximizes dynamic range.
What is the input offset voltage specification for TL084CDG4?
TL084CDG4 has a maximum input offset voltage of 10 mV at TA = 25°C, with typical value of 3 mV. Over full temperature range (0°C to +70°C), offset drift is ±18 µV/°C. These values are confirmed in Section 5.8 of the official TI datasheet SLOS081O and apply specifically to the 'C' grade (commercial temperature) devices including TL084CDG4.
Can TL084CDG4 drive capacitive loads?
Yes, TL084CDG4 is characterized to drive up to 300 pF capacitive load while maintaining stability. Its phase margin remains ≥56° with 20 pF load at unity gain, and small-signal step response shows minimal overshoot under these conditions. For loads >300 pF, external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to prevent peaking or oscillation.
Is TL084CDG4 pin-compatible with other TL084 variants?
Yes, TL084CDG4 uses the standard 14-pin SOIC (D) package and shares identical pinout with all TL084x variants-including TL084IDR, TL084ACDR, and TL084BCDR. Pin functions (e.g., 1IN–, 1IN+, 1OUT, VCC+, etc.) match Table 4-5 in the TI datasheet. No PCB layout changes are needed when substituting within the same package type.
TL084CDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- 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:
- 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
TL084CDG4 FAQ
1.How can I place an order for TL084CDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084CDG4 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 TL084CDG4 reliable?
The price and inventory of TL084CDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084CDG4 is usually 5 days.
3.What payment methods are accepted for TL084CDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084CDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084CDG4?
TL084CDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084CDG4 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 TL084CDG4?
For technical support, including TL084CDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084CDG4 requirements.
6.How does Aetrix verify that TL084CDG4 is sourced from the original manufacturer or authorized distributors?
All TL084CDG4 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 TL084CDG4 meets industry standards.
7.What is the process for return or replacement of TL084CDG4?
All TL084CDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL084CDG4, 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 TL084CDG4 part is unused and in its original packaging.
Return procedure for TL084CDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084CDG4 Tags
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