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Texas Instruments TL084CNG4
- Part No.:
- TL084CNG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TL084CNG4.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,162
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Product details
Overview
TL084CNG4 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, and 100 dB common-mode rejection - enabling high-fidelity amplification in pro audio mixers, battery test equipment, and motor drive feedback circuits.
For engineers reviewing the TL084CNG4 datasheet, TL084CNG4 pinout, TL084CNG4 application, or TL084CNG4 equivalent, this page provides verified electrical specifications, package-validated pin functions, real-world use cases with design-value context, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The TL084CNG4 implements a high-slew-rate JFET-input stage with bipolar output stage, supporting rail-to-rail input common-mode range (including VCC+) and stable unity-gain operation with up to 300 pF capacitive load. Its architecture enables low-noise (37 nV/√Hz at 1 kHz), low-input-bias-current (≤200 pA typical) performance across –40°C to +85°C ambient temperature.
It operates from dual supplies of ±2.25 V to ±20 V or single supply of 4.5 V to 40 V, with open-loop gain ≥118 dB and phase margin ≥56° under standard test conditions (G = +1, RL = 10 kΩ, CL = 20 pF), ensuring robust stability in closed-loop configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - supports four independent amplification paths in one IC, reducing board space vs discrete op-amp solutions. |
| Gain-bandwidth product | 5.25 MHz - enables stable amplification of signals up to ~500 kHz at G = +10 without excessive phase lag. |
| Slew rate | 20 V/μs - supports fast transient response in pulse amplification and active filter stages without slew-induced distortion. |
| Input offset voltage | 3 mV max (typ 10 mV) - defines DC accuracy limit in precision sensor interfaces; requires trimming or calibration for sub-mV error budgets. |
| Common-mode rejection | 100 dB min - rejects noise coupled equally to both inputs, critical in noisy industrial environments like motor drives. |
| Supply voltage range | ±2.25 V to ±20 V - accommodates legacy ±15 V rails and modern low-voltage systems without level-shifting circuitry. |
| Input bias current | 65–200 pA - enables high-impedance source interfacing (e.g., piezoelectric sensors, photodiode transimpedance) with minimal loading error. |
Pinout & Package
N (PDIP-14) package: 0.300-inch wide, through-hole dual in-line package with 14 leads, RoHS-compliant lead finish, and JEDEC MS-001 compliant 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 - accepts reference or sensor signal in non-inverting gain stages. |
| 3 | 1OUT | Output of amplifier A - drives next stage or load; capable of ±12 V swing into 10 kΩ at ±15 V supply. |
| 4 | VCC+ | Positive power supply - must be decoupled locally with 0.1 μF ceramic capacitor to ground. |
| 5 | 2IN+ | Non-inverting input of amplifier B - electrically isolated from other channels; shares no internal coupling. |
| 6 | 2IN– | Inverting input of amplifier B - used for differential pair or summing junction implementation. |
| 7 | 2OUT | Output of amplifier B - independently buffered; supports simultaneous multi-channel signal processing. |
| 8 | VCC– | Negative power supply - referenced to system ground in single-supply operation; requires local decoupling. |
| 9 | 3OUT | Output of amplifier C - identical AC/DC specs to channel A/B; validated for concurrent use. |
| 10 | 3IN+ | Non-inverting input of amplifier C - enables three-stage active filtering or cascaded gain blocks. |
| 11 | 3IN– | Inverting input of amplifier C - supports programmable gain via resistor networks tied to 10/11 pins. |
| 12 | 4IN+ | Non-inverting input of amplifier D - allows fourth independent function (e.g., reference buffer, comparator hysteresis). |
| 13 | 4IN– | Inverting input of amplifier D - usable as high-impedance null detector or precision integrator input. |
| 14 | 4OUT | Output of amplifier D - fully specified for drive capability and settling time; matches channel A–C performance. |
Key Features
| Feature | Design Value |
|---|---|
| High slew rate (20 V/μs) | Enables accurate reproduction of fast-rising edges in pulse-width modulation (PWM) feedback loops and oscilloscope front-ends. |
| Low input bias current (≤200 pA) | Minimizes voltage error when interfacing with high-impedance sources such as pH electrodes or photodiodes. |
| Wide common-mode input range (to VCC+) | Permits direct sensing of signals near positive rail - e.g., battery voltage monitoring without level shifters. |
| Output short-circuit protection | Prevents device destruction during accidental output shorts, improving reliability in field-deployed test equipment. |
| Low total harmonic distortion (0.003%) | Preserves signal fidelity in audio preamplifier and active crossover applications where spectral purity matters. |
Applications
| Pro Audio Mixer Channel | Battery Test Equipment |
|---|---|
Use Scenario: Amplifying microphone or line-level signals before analog-to-digital conversion in a 16-channel mixing console. IC Role / Device Role / Timing Role: Quad op-amp providing simultaneous pre-amplification, equalization, and summing for four parallel audio paths. Use Value: 100 dB CMRR suppresses hum from shared power supplies; 37 nV/√Hz input noise preserves dynamic range above 110 dB SPL. | Use Scenario: Precision voltage/current measurement during charge/discharge cycling of Li-ion cells in automated test systems. IC Role / Device Role / Timing Role: Four-channel signal conditioner for cell voltage sense, current shunt amplification, temperature sensor buffering, and reference generation. Use Value: 3 mV max input offset ensures ≤0.02% full-scale error at 15 V range; ±20 V supply headroom accommodates 16-cell stacks. |
| Motor Drive Current Sensing | Solar Inverter String Monitoring |
Use Scenario: Isolated current sensing in AC servo drive power stages using shunt resistors and galvanic isolation. IC Role / Device Role / Timing Role: Amplifier for shunt-based current feedback, configured as differential input stage preceding isolation amplifier. Use Value: 20 V/μs slew rate captures fast current transients during IGBT switching; 5.25 MHz GBW supports >200 kHz loop bandwidth. | Use Scenario: Monitoring individual PV string voltages and currents in central inverters to detect mismatch or shading faults. IC Role / Device Role / Timing Role: Quad buffer/amplifier for four independent string voltage measurements, each scaled to ADC input range. Use Value: Input common-mode range extending to VCC+ allows direct connection to strings up to 1000 V with appropriate resistive dividers. |
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 | SOIC-14 package, same electrical specs, lower thermal resistance (RθJA = 114.2°C/W vs 80°C/W for PDIP), no through-hole mounting. | Preferred for surface-mount production; unsuitable for prototyping on breadboards or wire-wrap boards requiring DIP footprint. | Select TL084CDR for automated SMT assembly; choose TL084CNG4 for manual soldering, legacy board compatibility, or thermal testing with heatsink clips. |
| OPA4134UA | Lower input offset (100 μV max), lower noise (8 nV/√Hz), higher GBW (8 MHz), but higher quiescent current (4 mA/ch) and narrower supply range (±5 V to ±18 V). | Used in ultra-low-distortion audio and medical instrumentation where cost premium is justified by performance uplift. | Choose OPA4134UA only if <100 μV offset and <0.0005% THD+N are mandatory; TL084CNG4 remains optimal for cost-sensitive industrial control with adequate precision. |
Compared with TL084CDR and OPA4134UA, TL084CNG4 offers the lowest unit cost and broadest supply flexibility (±2.25 V to ±20 V), making it ideal for high-volume industrial designs where moderate precision suffices and through-hole assembly is required.
Availability
TL084CNG4 is available at Aetrix Electronics and suitable for solar inverter string monitoring, motor drive current sensing, pro audio mixer channels, and battery test equipment requiring stable component supply over extended production lifecycles.
Supply support for TL084CNG4 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 TL08x family was engineered for cost-sensitive, high-reliability analog signal conditioning in industrial automation, test equipment, and audio systems - balancing performance, ruggedness, and manufacturability.
FAQ
What is the maximum operating temperature range for the TL084CNG4?
The TL084CNG4 is rated for operation from 0°C to +70°C ambient temperature, per its 'C' grade designation. This makes it suitable for commercial and industrial indoor environments but not extended-temperature applications requiring –40°C to +85°C or wider ranges. Always verify thermal derating when operating near maximum supply voltage or output load limits.
Does the TL084CNG4 support single-supply operation?
Yes, the TL084CNG4 supports single-supply operation from 4.5 V to 40 V. Its input common-mode range extends to VCC+, allowing direct interface with unipolar sensors or microcontroller ADC references. However, output swing is limited to within ~200 mV of each rail, so proper biasing (e.g., mid-rail virtual ground) is required for AC-coupled signals.
Is the TL084CNG4 pin-compatible with other TL084 variants like TL084CN or TL084CD?
Yes, TL084CNG4 uses the standard N (PDIP-14) package and shares identical pinout with all TL084x variants in the same package type, including TL084CN and TL084CD. Electrical specifications differ slightly by grade (C vs I vs H), but mechanical and functional pin mapping is fully compatible across the TL084x family in PDIP-14.
What is the typical input offset voltage drift of the TL084CNG4?
The TL084CNG4 has a typical input offset voltage drift of ±18 µV/°C across its full operating temperature range (0°C to +70°C). This value reflects long-term thermal stability and directly impacts DC accuracy in precision integrators or sensor amplifiers operating over wide ambient swings.
Can the TL084CNG4 drive capacitive loads without oscillation?
Yes, the TL084CNG4 is characterized to drive up to 300 pF capacitive load while maintaining ≥56° phase margin and stable step response. For loads exceeding 300 pF, external series resistance (e.g., 10–100 Ω) at the output is recommended to isolate the capacitance and preserve stability in high-speed applications.
TL084CNG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TL084CNG4 FAQ
1.How can I place an order for TL084CNG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084CNG4 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 TL084CNG4 reliable?
The price and inventory of TL084CNG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084CNG4 is usually 5 days.
3.What payment methods are accepted for TL084CNG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084CNG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084CNG4?
TL084CNG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084CNG4 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 TL084CNG4?
For technical support, including TL084CNG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084CNG4 requirements.
6.How does Aetrix verify that TL084CNG4 is sourced from the original manufacturer or authorized distributors?
All TL084CNG4 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 TL084CNG4 meets industry standards.
7.What is the process for return or replacement of TL084CNG4?
All TL084CNG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL084CNG4, 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 TL084CNG4 part is unused and in its original packaging.
Return procedure for TL084CNG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084CNG4 Tags
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