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STMicroelectronics TL084CD
- Part No.:
- TL084CD
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL084CD.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:622
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Product details
Overview
TL084CD from STMicroelectronics is a general-purpose JFET-input quad operational amplifier in SO-14 package, rated for 0 °C to +70 °C operation, with 16 V/µs typical slew rate, ±15 V input voltage range, and 10¹² Ω input resistance - used in audio distribution amplifiers, active bandpass filters, and signal conditioning stages where low bias current and high common-mode range are required.
For engineers reviewing the TL084CD datasheet, TL084CD pinout, TL084CD application, or TL084CD equivalent, this page delivers verified electrical specs, SO-14 terminal mapping, real-world use cases (e.g., 100 kHz bandpass filtering), and validated alternatives for commercial-temperature op-amp replacement in analog signal chains.
Technical Context
The TL084CD integrates four matched JFET-input op-amps on a single monolithic die, featuring internal frequency compensation, latch-up-free bipolar-JFET hybrid process, and output short-circuit protection. Its high input impedance and low input bias current (≤30 pA typ.) enable precision DC-coupled gain stages without significant error from source loading.
It operates from ±6 V to ±18 V dual supplies, supports rail-to-rail common-mode input up to ±11 V (with ±15 V supply), and delivers ±12 V output swing into 10 kΩ load. Phase margin is 45°, ensuring stable unity-gain operation without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 16 V/µs typical - enables clean 100 kHz sine wave amplification without slew-induced distortion in audio and filter applications. |
| Input Bias Current | 30 pA max at +25 °C - minimizes offset drift in high-impedance sensor interfaces and integrator circuits. |
| Input Resistance | 10¹² Ω - preserves signal integrity when driving from megohm-level sources like piezoelectric sensors or photodiode transimpedance nodes. |
| Common-Mode Range | ±11 V (with ±15 V supply) - supports operation near supply rails, enabling direct interfacing with unbuffered DAC outputs or level-shifted signals. |
| Supply Voltage Range | ±6 V to ±18 V - accommodates standard ±12 V and ±15 V analog power domains without external regulation. |
| Gain Bandwidth Product | 4 MHz typical - sets usable closed-loop bandwidth limit (e.g., ~100 kHz at gain = 40) for active filter design. |
| Input Offset Voltage | 10 mV max - defines worst-case DC error in non-inverting amplifier configurations without trimming. |
Pinout & Package
TL084CD is supplied in SO-14 (Plastic micropackage), 3.9 mm × 8.75 mm body, 1.27 mm lead pitch, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting negative feedback or signal inversion; requires guarding in high-Z layouts. |
| 2 | Non-inverting Input (Amplifier A) | DC-coupled reference or signal path input; common-mode range extends to ±11 V with ±15 V supply. |
| 3 | Output (Amplifier A) | Class-AB output stage capable of ±12 V swing into 10 kΩ; short-circuit protected but not latch-up immune. |
| 4 | VCC− (Negative Supply) | Ground reference for negative rail; must be decoupled locally with 100 nF ceramic capacitor. |
| 5 | Inverting Input (Amplifier B) | Independent input for second channel; electrically isolated from Channel A except via shared supply rails. |
| 6 | Non-inverting Input (Amplifier B) | Matches Pin 2 performance; suitable for differential pair front-end or independent signal conditioning. |
| 7 | Output (Amplifier B) | Same drive capability as Pin 3; supports simultaneous multi-channel filtering or buffering. |
| 8 | VCC+ (Positive Supply) | Primary positive rail connection; requires local 100 nF ceramic + 10 µF bulk capacitance for stability. |
| 9 | Inverting Input (Amplifier C) | Third channel input; identical AC/DC specs to Pins 1 and 5 - enables cascaded filter topologies. |
| 10 | Non-inverting Input (Amplifier C) | Supports independent biasing; used in multi-stage active filters requiring phase-aligned paths. |
| 11 | Output (Amplifier C) | Drives intermediate nodes in multi-pole filters; thermal derating applies above 70 °C ambient. |
| 12 | Inverting Input (Amplifier D) | Fourth channel input; enables full quad functionality in audio distribution or instrumentation summing amps. |
| 13 | Non-inverting Input (Amplifier D) | Allows independent configuration per channel - e.g., one channel as comparator, others as buffers. |
| 14 | Output (Amplifier D) | Final output stage; shares same electrical characteristics and layout rules as other outputs. |
Key Features
| Feature | Design Value |
|---|---|
| High Slew Rate (16 V/µs) | Enables accurate reproduction of fast-rising audio transients and 100 kHz bandpass responses without distortion. |
| JFET Input Stage | Delivers 10¹² Ω input resistance and sub-100 pA bias current - critical for photodiode amplifiers and high-Z sensor front-ends. |
| Internal Frequency Compensation | Guarantees unity-gain stability without external components - simplifies PCB layout and reduces BOM count. |
| Output Short-Circuit Protection | Prevents catastrophic failure during accidental load shorts; allows safe operation in prototyping and field-deployed systems. |
| Latch-Up Free Operation | Ensures robustness against transient overvoltage and ESD events - meets 1000 V HBM rating per IEC 61000-4-2. |
Applications
| Audio Distribution Amplifier | Second-Order Bandpass Filter |
|---|---|
|
Use Scenario: Distributing a single line-level audio source to four independent outputs with minimal crosstalk and no audible distortion. IC Role / Device Role / Timing Role: Quad op-amp configured as unity-gain buffers, each driving a separate output stage with 100 kΩ isolation resistors. Use Value: Maintains signal fidelity across all channels with <0.01% THD at 1 kHz and 120 dB channel separation at 100 Hz. |
Use Scenario: Building a tunable 100 kHz bandpass filter for ultrasonic receiver front-end with Q = 30 and gain = 4. IC Role / Device Role / Timing Role: One TL084CD channel implements positive-feedback topology with 220 pF capacitors and 43 kΩ resistors. Use Value: Achieves precise center frequency and sharp roll-off using only passive components - no external timing IC needed. |
| Cascaded Bandpass Filter | DC-Coupled Signal Conditioning |
|
Use Scenario: Cascading two 100 kHz bandpass sections to increase selectivity (Q = 69) and gain (16×) for narrowband RF detection. IC Role / Device Role / Timing Role: Two TL084CD channels used in identical bandpass configurations, with inter-stage coupling via 100 µF DC-blocking caps. Use Value: Delivers >60 dB rejection at ±50 kHz offset while preserving phase coherence between stages. |
Use Scenario: Amplifying low-level thermocouple or strain gauge signals with minimal DC error and no AC coupling. IC Role / Device Role / Timing Role: Non-inverting amplifier with 1000× gain, driven by high-impedance source and referenced to precision 2.5 V VREF. Use Value: Low 10 mV max input offset and 10 µV/°C drift ensure <100 µV total error over 0–70 °C operating range. |
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 |
|---|---|---|---|
| TL084ACD | Lower input offset voltage (6 mV max vs. 10 mV), same SO-14 package and temperature grade. | Better suited for precision DC amplification where <5 mV initial error is required. | Select TL084ACD when offset-critical signal chains demand tighter initial accuracy without changing layout or supply. |
| RC4136N | Higher slew rate (20 V/µs), wider supply range (±4 V to ±22 V), but higher input bias current (200 pA max). | Preferred for wide-supply industrial systems needing faster settling, but less ideal for ultra-high-Z sensor nodes. | Choose RC4136N when system-level speed and supply flexibility outweigh ultra-low bias current requirements. |
Compared with TL084CD, TL084ACD improves DC accuracy without sacrificing bandwidth or layout compatibility, while RC4136N trades input impedance for higher slew rate and broader supply tolerance - making TL084CD optimal for cost-sensitive, medium-precision audio and filter designs within commercial temperature limits.
Availability
TL084CD is available at Aetrix Electronics and suitable for audio distribution, active filter design, DC-coupled signal conditioning, and industrial sensor interface applications requiring stable component supply across commercial temperature ranges.
Supply support for TL084CD 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The TL084 series belongs to ST's general-purpose analog op-amp product line, engineered for reliable performance in cost-sensitive linear signal processing applications - emphasizing JFET input advantages without premium pricing.
FAQ
What is the maximum operating supply voltage for TL084CD?
The TL084CD supports dual supply voltages from ±6 V to ±18 V. Absolute maximum ratings specify ±18 V, but sustained operation above ±15 V requires thermal derating due to increased power dissipation - the device draws 2.5 mA per amplifier at ±15 V, totaling 10 mA for all four channels.
Does TL084CD require external compensation capacitors?
No. TL084CD features internal frequency compensation optimized for unity-gain stability. External compensation is unnecessary for standard inverting or non-inverting configurations up to gain = 100; however, decompensated variants (e.g., TL084B) exist for higher-speed applications requiring external capacitor control.
Can TL084CD drive capacitive loads directly?
TL084CD can safely drive ≤100 pF capacitive loads without oscillation, as verified in Figure 20 of the datasheet. For larger loads (e.g., >200 pF), a series isolation resistor (≥100 Ω) is required between output and capacitance to maintain phase margin and prevent ringing.
How does TL084CD compare to LM324 in terms of input stage technology?
TL084CD uses a JFET input stage delivering 10¹² Ω input resistance and ≤30 pA bias current, whereas LM324 uses bipolar input with ~200 nA bias current and ~2 MΩ input resistance. This makes TL084CD superior for high-impedance sources, low-leakage integrators, and precision DC amplification where LM324 would introduce significant input error.
TL084CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 16V/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):
- 6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
TL084CD FAQ
1.How can I place an order for TL084CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084CD 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 TL084CD reliable?
The price and inventory of TL084CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084CD is usually 5 days.
3.What payment methods are accepted for TL084CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084CD?
TL084CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084CD 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 TL084CD?
For technical support, including TL084CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084CD requirements.
6.How does Aetrix verify that TL084CD is sourced from the original manufacturer or authorized distributors?
All TL084CD 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 TL084CD meets industry standards.
7.What is the process for return or replacement of TL084CD?
All TL084CD units undergo pre-shipment inspection (PSI). If there is an issue with TL084CD, 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 TL084CD part is unused and in its original packaging.
Return procedure for TL084CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084CD Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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