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Texas Instruments TL084CDRG4
- Part No.:
- TL084CDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL084CDRG4.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,502
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Product details
Overview
TL084CDRG4 from Texas Instruments is a quad JFET-input operational amplifier designed for precision analog signal conditioning in industrial and audio systems. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±15 V supply operation, and 100 dB CMRR - enabling high-fidelity amplification in pro audio mixers and battery test equipment.
For engineers reviewing the TL084CDRG4 datasheet, TL084CDRG4 pinout, TL084CDRG4 application, or TL084CDRG4 equivalent, this page provides verified specifications, SOIC-14 package layout, real-world use cases in solar inverters and motor drives, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The TL084CDRG4 implements a high-slew-rate JFET input stage with rail-to-rail common-mode input range extending to VCC+, enabling accurate sensing near supply rails. Its four independent amplifiers share a single dual-supply interface (VCC+ and VCC–), with no internal offset nulling pins - distinguishing it from TL084 variants with offset adjustment terminals.
It operates across 0°C to 70°C ambient temperature with 1.4 mA typical quiescent current per channel and supports capacitive loads up to 300 pF without instability. The device exhibits low 37 nV/√Hz input voltage noise at 1 kHz and 0.003% THD+N at 1 kHz, making it suitable for medium-bandwidth AC-coupled signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables multi-stage filtering or simultaneous signal conditioning of four sensor channels in one IC. |
| Gain-bandwidth product | 5.25 MHz - supports stable unity-gain operation up to ~5 MHz or closed-loop gain of 10 at ~525 kHz. |
| Slew rate | 20 V/μs - ensures <0.63 μs settling to 0.1% for 10-V step, critical for fast transient response in UPS control loops. |
| Input offset voltage | 3 mV (max) - limits DC error to ≤3 mV at room temperature, sufficient for non-critical industrial sensing. |
| Common-mode rejection | 100 dB - rejects 100,000:1 of power-supply ripple or shared-noise coupling in differential configurations. |
| Supply voltage range | ±2.25 V to ±20 V (or 4.5 V to 40 V single-ended) - accommodates legacy ±15 V rails and modern wide-range industrial supplies. |
| Input bias current | 65 pA (typ) - minimizes voltage drop across high-impedance sources like piezoelectric sensors or photodiode feedback networks. |
Pinout & Package
TL084CDRG4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm wide, with standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and rated for surface-mount reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OUT | Output of first amplifier - drives external load or next stage; capable of ±12 V swing into 10 kΩ. |
| 2 | 1IN– | Inverting input of first amplifier - accepts feedback network or inverted signal path. |
| 3 | 1IN+ | Non-inverting input of first amplifier - connects to reference, sensor, or buffered input source. |
| 4 | VCC+ | Positive supply rail - must be decoupled locally with ≥0.1 µF ceramic capacitor to ground. |
| 5 | 2IN+ | Non-inverting input of second amplifier - electrically isolated from other channels; no crosstalk below –80 dB. |
| 6 | 2IN– | Inverting input of second amplifier - used for differential gain configuration or active filter topology. |
| 7 | 2OUT | Output of second amplifier - shares same output drive capability and short-circuit protection as Pin 1. |
| 8 | VCC– | Negative supply rail - referenced to system ground in single-supply designs; requires local decoupling. |
| 9 | 3OUT | Output of third amplifier - identical electrical behavior to Pins 1 and 7; supports independent signal path. |
| 10 | 3IN+ | Non-inverting input of third amplifier - usable for multi-channel instrumentation front-ends. |
| 11 | 3IN– | Inverting input of third amplifier - supports transimpedance or current-to-voltage conversion. |
| 12 | 4IN+ | Non-inverting input of fourth amplifier - enables full quad functionality without external interconnects. |
| 13 | 4IN– | Inverting input of fourth amplifier - configurable as summing node or comparator input with hysteresis. |
| 14 | 4OUT | Output of fourth amplifier - includes built-in short-circuit protection limiting current to ±26 mA. |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | 65 pA typical input bias current enables high-impedance sensor interfacing without significant loading error. |
| Rail-to-rail common-mode input | Accepts signals up to VCC+ - eliminates need for level-shifting in single-supply applications with grounded references. |
| Output short-circuit protection | Self-limiting ±26 mA output current prevents latch-up or thermal damage during accidental shorts. |
| Low 1.4 µVRMS 0.1–10 Hz noise | Supports precision DC-coupled measurement paths in battery test equipment where low-frequency drift matters. |
| EMI rejection ratio of 53 dB at 1 GHz | Reduces susceptibility to RF interference in noisy industrial environments like motor drive cabinets. |
Applications
| Solar Energy Inverters | Motor Drive Control |
|---|---|
Use Scenario: Signal conditioning of DC-link voltage and current feedback in string-level MPPT controllers. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous scaling, isolation buffering, and fault-detection threshold comparison. Use Value: 100 dB CMRR suppresses switching noise from IGBT gate drivers; 20 V/μs slew rate captures fast overcurrent transients. |
Use Scenario: Closed-loop torque and speed regulation in AC servo drives using encoder and current feedback. IC Role / Device Role / Timing Role: Configured as transimpedance amplifiers for shunt-based current sensing and active filters for position signal cleanup. Use Value: 65 pA input bias avoids gain error in milliohm-shunt circuits; quad integration reduces board space vs discrete solutions. |
| Pro Audio Mixers | Battery Test Equipment |
Use Scenario: Line-level preamplification, equalization, and summing in analog mixing consoles. IC Role / Device Role / Timing Role: Each amplifier handles one channel's gain stage, tone control, or bus summing node. Use Value: 0.003% THD+N preserves audio fidelity; 37 nV/√Hz noise floor maintains >100 dB dynamic range at 1 kHz. |
Use Scenario: Precision voltage/current sourcing and measurement during charge/discharge cycling of Li-ion cells. IC Role / Device Role / Timing Role: Used in programmable load circuits and Kelvin-sense amplifiers for sub-mV accuracy. Use Value: 3 mV max input offset ensures ≤0.02% full-scale error at 15 V range; low 1.4 µVRMS 0.1–10 Hz noise improves DC stability. |
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 operating temperature range (–40°C to +85°C) and higher CMRR (105 dB min) vs TL084CDRG4 (0°C to +70°C, 100 dB min). | Better suited for automotive cabin modules or outdoor UPS enclosures where ambient extremes occur. | Select TL084IDR when extended temperature performance and tighter DC specs are required; pinout and footprint identical. |
| TL074CDR | Lower input voltage noise (18 nV/√Hz vs 37 nV/√Hz), lower THD+N (0.002% vs 0.003%), but reduced slew rate (13 V/μs vs 20 V/μs). | Preferred in ultra-low-noise audio paths; less suitable for fast transient capture in power electronics monitoring. | Choose TL074CDR for high-fidelity audio signal chains; avoid in solar inverter current-sense paths requiring >15 V/μs slew. |
Compared with TL084CDRG4, TL084IDR offers guaranteed performance over wider temperature and tighter DC specs at no layout change, while TL074CDR trades slew rate for lower noise - making TL084CDRG4 the balanced choice for industrial mixed-signal applications demanding speed, noise, and cost efficiency.
Availability
TL084CDRG4 is available at Aetrix Electronics and suitable for solar energy inverters, motor drive control modules, and pro audio mixer designs requiring stable component supply, long-term manufacturability, and TI-qualified industrial-grade reliability.
Supply support for TL084CDRG4 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 components.
The TL084 family was engineered for cost-sensitive industrial and audio applications requiring JFET-input performance, robust ESD tolerance (±1.5 kV HBM), and compatibility with legacy ±15 V systems.
FAQ
What is the maximum supply voltage for TL084CDRG4?
The TL084CDRG4 supports a total supply voltage (VCC+ to VCC–) of up to 40 V, or ±20 V dual supply. Absolute maximum ratings specify 42 V for most packages, but recommended operation is limited to 40 V to ensure long-term reliability and specified performance across temperature.
Does TL084CDRG4 include internal offset nulling pins?
No, TL084CDRG4 does not include offset nulling pins. Unlike some TL084 variants (e.g., TL084ACN with pins 1 and 5 for offset trim), the TL084CDRG4 uses a fixed internal architecture with 3 mV max input offset voltage at 25°C - sufficient for non-critical industrial signal conditioning.
Can TL084CDRG4 drive capacitive loads reliably?
Yes, TL084CDRG4 is characterized to drive up to 300 pF capacitive load without oscillation when properly decoupled. For loads >100 pF, adding a small series resistor (10–50 Ω) between output and capacitance improves phase margin and step response stability.
What is the input common-mode voltage range of TL084CDRG4?
The TL084CDRG4 features a rail-to-rail common-mode input range extending to VCC+. Specifically, it accepts inputs from (VCC–) + 1.5 V up to VCC+, enabling direct interfacing with grounded sensors or single-supply ADC drivers without level-shifting circuitry.
Is TL084CDRG4 suitable for single-supply operation?
Yes, TL084CDRG4 supports true single-supply operation from 4.5 V to 40 V. Its input common-mode range includes the positive rail, and output can swing within ~210 mV of each rail under 10 kΩ load - allowing use in 5 V, 12 V, or 24 V systems with appropriate biasing.
TL084CDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
TL084CDRG4 FAQ
1.How can I place an order for TL084CDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084CDRG4 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 TL084CDRG4 reliable?
The price and inventory of TL084CDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084CDRG4 is usually 5 days.
3.What payment methods are accepted for TL084CDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084CDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084CDRG4?
TL084CDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084CDRG4 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 TL084CDRG4?
For technical support, including TL084CDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084CDRG4 requirements.
6.How does Aetrix verify that TL084CDRG4 is sourced from the original manufacturer or authorized distributors?
All TL084CDRG4 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 TL084CDRG4 meets industry standards.
7.What is the process for return or replacement of TL084CDRG4?
All TL084CDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL084CDRG4, 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 TL084CDRG4 part is unused and in its original packaging.
Return procedure for TL084CDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084CDRG4 Tags
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