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Texas Instruments TL084BCD
- Part No.:
- TL084BCD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL084BCD.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,115
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Product details
Overview
TL084BCD from Texas Instruments is a quad JFET-input operational amplifier designed for precision analog signal conditioning in industrial and audio systems. It delivers 20 V/μs slew rate, ±1 mV input offset voltage (typ), 5.25 MHz gain-bandwidth product, low 37 nV/√Hz input voltage noise at 1 kHz, and operates from ±2.25 V to ±20 V supplies. It serves as the core amplification stage in pro audio mixers and battery test equipment.
For engineers reviewing the TL084BCD datasheet, TL084BCD pinout, TL084BCD application, or TL084BCD equivalent, this page provides verified specifications, SOIC-14 package details, functional pin mapping, real-world use cases in high-EMI motor drives and solar inverters, and two validated alternative parts with documented electrical and thermal differences.
Technical Context
The TL084BCD uses a JFET-input differential pair architecture enabling ultra-low input bias current (±1 pA typ) and wide common-mode range extending to VCC+. Its internal compensation ensures stable unity-gain operation with up to 300 pF capacitive load drive and 56° phase margin.
It features integrated EMI/RF filters and 1.5 kV HBM ESD protection, supporting reliable operation across –40°C to 125°C ambient. The device maintains 118 dB open-loop gain and 100 dB CMRR over temperature while delivering rail-to-rail output swing headroom of 115 mV (positive) and 105 mV (negative) at 40 V supply with 10 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 20 V/μs - enables clean amplification of fast transients in motor control feedback loops without distortion |
| Input Offset Voltage | ±1 mV (typ) - supports DC-coupled sensor interfaces requiring <100 μV error in 10-bit systems |
| Gain-Bandwidth Product | 5.25 MHz - allows stable closed-loop gain ≥10 up to 500 kHz for anti-aliasing filter design |
| Input Voltage Noise | 37 nV/√Hz at 1 kHz - suitable for low-level microphone preamp stages where SNR > 90 dB is required |
| Supply Voltage Range | ±2.25 V to ±20 V - accommodates dual-rail industrial control systems and legacy ±15 V instrumentation |
| Common-Mode Input Range | Includes VCC+ - permits direct sensing of signals referenced to positive rail, e.g., high-side current monitoring |
| Quiescent Current | 937.5 μA per amplifier - enables four-channel amplification in power-constrained battery test fixtures |
Pinout & Package
TL084BCD is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) with standard JEDEC MS-012AC footprint (5.3 mm width, 1.27 mm pitch). Thermal resistance RθJA is 114.2°C/W, supporting continuous operation at up to 85°C ambient in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OUT | Amplifier A output - drives external load or next-stage input; capable of sourcing/sinking ±26 mA |
| 2 | 1IN– | Inverting input of Amplifier A - connects to feedback network or summing junction in active filters |
| 3 | 1IN+ | Non-inverting input of Amplifier A - accepts high-impedance sensor or reference signals with ≤1 pA bias current |
| 4 | VCC+ | Positive supply rail - must be decoupled with ≥0.1 μF ceramic capacitor placed within 5 mm of pin |
| 5 | 2IN+ | Non-inverting input of Amplifier B - isolated from other channels to prevent crosstalk in multi-channel data acquisition |
| 6 | 2IN– | Inverting input of Amplifier B - used for differential input configuration with matched resistor networks |
| 7 | 2OUT | Amplifier B output - shares same output drive capability and short-circuit protection as Pin 1 |
| 8 | VCC– | Negative supply rail - requires symmetric decoupling to maintain PSRR > 100 dB across frequency |
| 9 | 3IN– | Inverting input of Amplifier C - supports independent gain-setting for third channel without shared bias paths |
| 10 | 3IN+ | Non-inverting input of Amplifier C - enables true rail-to-rail common-mode operation up to VCC+ |
| 11 | 3OUT | Amplifier C output - electrically isolated from Pins 1 and 7 to ensure <1 µV/V channel separation at DC |
| 12 | 4IN+ | Non-inverting input of Amplifier D - optimized for low-noise performance with 37 nV/√Hz spectral density |
| 13 | 4IN– | Inverting input of Amplifier D - compatible with precision trimming via external offset-null resistors on Pins 1 and 5 |
| 14 | 4OUT | Amplifier D output - delivers full 20 V/μs slew into 2 kΩ loads for fast-settling DAC buffer applications |
Key Features
| Feature | Design Value |
|---|---|
| High ESD robustness | 1.5 kV HBM rating - eliminates need for external TVS diodes in factory-floor test equipment interfaces |
| Integrated EMI/RF filters | 53 dB EMI rejection at 1 GHz - suppresses switching noise from adjacent DC-DC converters in UPS modules |
| Output short-circuit protection | Self-limiting ±26 mA current - prevents latch-up during probe misconnection in battery analyzer front-ends |
| Low THD+N | 0.00012% at 1 kHz - preserves harmonic integrity in pro audio line drivers handling 6 VRMS signals |
| Rail-to-rail input | Common-mode range includes VCC+ - enables single-supply operation in solar string monitor circuits sensing up to +40 V |
Applications
| Solar String Monitoring | Motor Drive Feedback |
|---|---|
|
Use Scenario: Measuring photovoltaic string voltage and current in central inverters under variable irradiance and temperature. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous differential sensing of shunt voltage, bus voltage, temperature-compensated reference, and isolation amplifier bias. Use Value: 20 V/μs slew rate captures rapid MPPT transients; ±1 mV offset ensures <0.01% measurement error across –40°C to 85°C operating range. |
Use Scenario: Closed-loop current and velocity control in AC servo drives using encoder and current-sense feedback. IC Role / Device Role / Timing Role: Configured as transimpedance amplifier for current-sense resistor, difference amplifier for motor phase voltage, and active filter for encoder signal conditioning. Use Value: 5.25 MHz GBW supports 100 kHz loop bandwidth; 37 nV/√Hz noise floor maintains encoder resolution at 16-bit level. |
| Pro Audio Mixer Channel | Battery Test Equipment |
|
Use Scenario: Analog signal path in 32-channel digital mixing console for microphone preamplification, EQ filtering, and line-level output buffering. IC Role / Device Role / Timing Role: One TL084BCD per channel handles mic preamp gain, high-pass filter, parametric EQ section, and line driver output stage. Use Value: Low 37 nV/√Hz noise enables >90 dB SNR; 0.00012% THD+N preserves harmonic richness in studio-grade audio reproduction. |
Use Scenario: Precision voltage/current sourcing and measurement in automated battery formation and cycling systems for Li-ion cells. IC Role / Device Role / Timing Role: Serves as integrator in constant-current source, differential amplifier for cell voltage sensing, reference buffer, and comparator hysteresis generator. Use Value: ±1 mV offset ensures <100 μV absolute accuracy in 4.2 V full-scale measurement; 937.5 μA/quiescent current minimizes self-heating drift. |
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 | Same SOIC-14 package, but rated for 0°C to 70°C only; higher max offset voltage (10 mV vs 4 mV max); 1.4 mA quiescent current per amp | Not qualified for automotive or extended industrial temperature ranges; unsuitable for battery test equipment operating at –20°C | Select TL084BCD when full –40°C to 125°C operation, lower offset, or lower power is required |
| OPA4134UA | Higher precision: 0.5 mV max offset, 120 dB CMRR, 8 MHz GBW; SOIC-14; 4 mA IQ per amp; no integrated EMI filters | Better for audio ADC front-ends needing >110 dB SNR; lacks EMI hardening for noisy motor drive environments | Choose OPA4134UA for premium audio signal chains; TL084BCD preferred for cost-sensitive, EMI-heavy industrial controls |
Compared with TL084CDR, TL084BCD offers 2.5× tighter offset spec and 35% lower quiescent current across temperature; versus OPA4134UA, it trades 30% higher noise and 50% lower GBW for integrated EMI suppression and 60% lower cost in volume production.
Availability
TL084BCD is available at Aetrix Electronics and suitable for solar inverter monitoring, motor drive feedback control, and pro audio mixer designs requiring stable component supply across long production lifecycles.
Supply support for TL084BCD 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 over 50 years of op-amp innovation and manufacturing excellence.
The TL084BCD belongs to TI's legacy FET-input op-amp family, engineered for high-reliability industrial signal conditioning where JFET input impedance, low noise, and wide supply range are critical.
FAQ
What is the maximum operating temperature range for TL084BCD?
The TL084BCD is specified for operation from –40°C to +125°C ambient temperature. This extended range is validated per TI's recommended operating conditions and supports deployment in harsh environments such as solar inverter enclosures and industrial motor drive cabinets where internal temperatures exceed 85°C.
Does TL084BCD support single-supply operation?
Yes, TL084BCD supports true single-supply operation due to its common-mode input voltage range extending to VCC+. When powered from +5 V to +40 V with VCC– grounded, it accepts inputs from 1.5 V above ground up to the positive rail, enabling direct interfacing with unipolar sensors and microcontroller ADC references without level-shifting circuitry.
What is the typical input bias current of TL084BCD?
The typical input bias current of TL084BCD is ±1 pA at 25°C, with a maximum of ±120 pA over the full –40°C to +125°C temperature range. This ultra-low value stems from its JFET-input architecture and makes it ideal for high-impedance pH electrode buffers, piezoelectric sensor amplifiers, and leakage-current measurement circuits.
Can TL084BCD drive capacitive loads directly?
Yes, TL084BCD is characterized to safely drive up to 300 pF capacitive loads while maintaining 56° phase margin and stable step response. This capability eliminates the need for external isolation resistors in applications like DAC output buffering and piezo actuator drivers, provided layout practices minimize parasitic capacitance beyond the specified limit.
How does TL084BCD differ from TL084H in terms of performance?
TL084BCD and TL084H share identical electrical specifications including 20 V/μs slew rate, 5.25 MHz GBW, and ±1 mV offset voltage (typ), but TL084BCD is the commercial-grade variant (0°C to 70°C), whereas TL084H is the high-reliability version rated for –40°C to +125°C with enhanced ESD (1.5 kV HBM) and integrated EMI filters - both are available in SOIC-14, but only TL084H appears in the "TL08xH" family documentation cited in the datasheet.
TL084BCD 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:
- 2 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
TL084BCD FAQ
1.How can I place an order for TL084BCD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084BCD 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 TL084BCD reliable?
The price and inventory of TL084BCD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084BCD is usually 5 days.
3.What payment methods are accepted for TL084BCD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084BCD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084BCD?
TL084BCD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084BCD 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 TL084BCD?
For technical support, including TL084BCD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084BCD requirements.
6.How does Aetrix verify that TL084BCD is sourced from the original manufacturer or authorized distributors?
All TL084BCD 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 TL084BCD meets industry standards.
7.What is the process for return or replacement of TL084BCD?
All TL084BCD units undergo pre-shipment inspection (PSI). If there is an issue with TL084BCD, 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 TL084BCD part is unused and in its original packaging.
Return procedure for TL084BCD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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