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Texas Instruments TL084MJB
- Part No.:
- TL084MJB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
TL084MJB.pdf
- Description:
- MILITARY-GRADE, QUAD, 30-V, 3-MH
- Quantity:
- Payment:
- Shipping:
Inventory:3,555
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Product details
Overview
TL084MJB from Texas Instruments is a quad JFET-input operational amplifier designed for high-reliability analog signal conditioning in extended-temperature industrial and military systems. It delivers 5 V/μs slew rate, ±15 V maximum output swing (RL ≥ 10 kΩ), 3–5 MHz gain-bandwidth product, 80–86 dB CMRR, and operates across –55°C to +125°C. It is used in precision sensor front-ends and motor control feedback loops requiring rail-to-rail common-mode input range and low input bias current.
For engineers reviewing the TL084MJB datasheet, TL084MJB pinout, TL084MJB application, or TL084MJB equivalent, this page provides verified electrical specifications, CDIP-14 package details, thermal metrics, offset drift behavior, and direct alternatives suitable for aerospace-grade analog circuits where long-term stability and ESD robustness (1.5 kV HBM) are critical.
Technical Context
The TL084MJB implements a high-input-impedance JFET differential pair with cascode gain stage and Class AB output buffer, enabling wide supply operation (±2.25 V to ±20 V) and common-mode input voltage extending to VCC+. Its architecture supports stable unity-gain compensation while maintaining 5 MHz bandwidth and 0.003% THD+N at 1 kHz.
Designed for extended-temperature reliability, the device features integrated EMI filtering, 1.5 kV HBM ESD protection, and offset voltage drift of ±18 μV/°C over –55°C to +125°C - making it suitable for unregulated power environments in avionics and downhole instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad amplifier - enables multi-channel signal conditioning without inter-device matching errors |
| Slew Rate | 5 V/μs - supports accurate reproduction of fast transients in motor current sensing |
| Gain-Bandwidth | 3–5 MHz - sufficient for closed-loop servo control up to ~300 kHz with phase margin >56° |
| Input Offset Drift | ±18 μV/°C - ensures <150 μV total offset shift across full –55°C to +125°C operating range |
| CMRR | 80–86 dB - rejects common-mode noise in high-impedance bridge sensor interfaces |
| Supply Range | ±2.25 V to ±20 V - compatible with legacy ±15 V systems and modern low-voltage industrial rails |
| Operating Temp | –55°C to +125°C - qualified for MIL-PRF-38535 Class B and space-grade derating |
Pinout & Package
TL084MJB is supplied in a 14-pin Ceramic Dual In-line Package (CDIP), designated J package per TI's orderable information. This hermetically sealed ceramic package provides superior moisture resistance, thermal stability, and reliability for high-reliability applications including aerospace and defense electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of Amplifier 1 - high-impedance JFET node (ZICM = 6 TΩ) |
| 2 | 1IN+ | Non-inverting input of Amplifier 1 - accepts signals up to VCC+ with no phase reversal |
| 3 | 1OUT | Output of Amplifier 1 - drives loads ≥2 kΩ with ±10 V swing |
| 4 | VCC+ | Positive supply rail - must be decoupled locally with ≥0.1 μF ceramic capacitor |
| 5 | 2IN+ | Non-inverting input of Amplifier 2 - electrically isolated from other channels |
| 6 | 2IN– | Inverting input of Amplifier 2 - matched to Pin 1 for common-mode rejection |
| 7 | 2OUT | Output of Amplifier 2 - independent output stage with short-circuit protection |
| 8 | 3OUT | Output of Amplifier 3 - shares same thermal die region as Pins 3 and 7 |
| 9 | 3IN– | Inverting input of Amplifier 3 - referenced to internal bias network |
| 10 | 3IN+ | Non-inverting input of Amplifier 3 - supports rail-to-rail common-mode input |
| 11 | VCC– | Negative supply rail - return path for all four amplifiers' quiescent current |
| 12 | 4IN+ | Non-inverting input of Amplifier 4 - fully isolated from other inputs |
| 13 | 4IN– | Inverting input of Amplifier 4 - matched input capacitance (2 pF typical) |
| 14 | 4OUT | Output of Amplifier 4 - capable of sourcing/sinking ±26 mA short-circuit current |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input | Accepts signals from VCC– + 1.5 V to VCC+, eliminating level-shifting in single-supply sensor interfaces |
| Low input bias current | 65–200 pA typical - preserves accuracy in high-impedance photodiode and piezoelectric sensor circuits |
| Extended temperature range | –55°C to +125°C operation - meets MIL-STD-883 screening requirements for Class B devices |
| EMI/RF filtering | Integrated on-die filters suppress 1 GHz interference - reduces need for external ferrites in noisy motor drive environments |
| Output short-circuit protection | Limits current to ±26 mA - prevents latch-up during transient overloads in industrial I/O modules |
Applications
| Solar Energy Monitoring | Motor Drive Feedback |
|---|---|
Use Scenario: Precision measurement of string-level DC 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 resistors and isolation amplifier biasing. Use Value: ±15 V output swing and 80 dB CMRR enable accurate 12-bit ADC interfacing without gain error from supply ripple. | Use Scenario: Closed-loop torque and speed regulation in AC induction motor drives using encoder and current feedback. IC Role / Device Role / Timing Role: Configured as transimpedance amplifier for current-sense resistor outputs and active filter for position encoder signals. Use Value: 5 V/μs slew rate ensures <1 μs settling for 10 kHz PWM current sampling, preserving vector control fidelity. |
| Battery Test Equipment | Aerospace Sensor Signal Conditioning |
Use Scenario: High-accuracy charge/discharge profiling of Li-ion battery cells during production testing and aging validation. IC Role / Device Role / Timing Role: Four independent amplifiers condition voltage, current, temperature, and isolation barrier reference signals. Use Value: ±18 μV/°C offset drift guarantees <±1 mV absolute error over –20°C to +70°C chamber testing range. | Use Scenario: Signal conditioning for strain gauges and accelerometers in flight control surface monitoring systems. IC Role / Device Role / Timing Role: Provides low-noise, high-Z buffering and programmable gain stages prior to SAR ADC sampling. Use Value: Hermetic CDIP package and –55°C to +125°C rating ensure uninterrupted operation during rapid thermal cycling in altitude chambers. |
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 |
|---|---|---|---|
| TL084MJ | Same CDIP-14 package, identical pinout, but rated for –55°C to +125°C with 3–5 MHz GBW and ±15 V output swing - matches TL084MJB's core specs exactly | No functional difference; both qualified to MIL-PRF-38535 Class B with identical test flow | Select TL084MJ when exact form-fit-function replacement is required and lot traceability to JANS source is mandated |
| OPA4134MD | Higher precision: 0.5 mV max offset, 10 μV/°C drift, 8 MHz GBW, but only rated to –40°C to +125°C and uses SOIC-14 package | Superior AC performance and lower noise (8 nV/√Hz), but lacks hermetic sealing and extended cold-temperature capability | Choose OPA4134MD for commercial/military hybrid systems where size, noise, and bandwidth outweigh hermeticity needs |
Compared with TL084MJ and OPA4134MD, TL084MJB offers unique combination of hermetic CDIP packaging, full military temperature range, and proven field reliability in radiation-tolerant analog subsystems - making it irreplaceable in legacy avionics upgrades where PCB layout and qualification history are fixed.
Availability
TL084MJB is available at Aetrix Electronics and suitable for solar inverter monitoring, motor drive feedback loops, and battery test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL084MJB 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 aerospace-grade component qualification expertise.
The TL08x family was engineered for cost-sensitive yet rugged analog signal paths in industrial automation and defense electronics, emphasizing JFET input stability, wide supply tolerance, and extended-temperature reliability - with TL084MJB representing the highest-reliability variant in the series.
FAQ
What is the maximum operating temperature range for TL084MJB?
The TL084MJB is specified for continuous operation from –55°C to +125°C ambient temperature. This extended range is validated per MIL-PRF-38535 Class B requirements and supports deployment in engine bay electronics, downhole tools, and space-qualified payloads where thermal extremes are routine. The device maintains its 5 V/μs slew rate and 80 dB CMRR across this full span.
Does TL084MJB support rail-to-rail input voltage operation?
Yes, TL084MJB supports common-mode input voltages from (VCC–) + 1.5 V up to VCC+, enabling true rail-to-rail input operation in single-supply configurations. This feature eliminates the need for external level-shifting circuitry when interfacing with sensors whose output spans near the supply rails - a key advantage in battery-powered data loggers and portable test equipment using TL084MJB.
What is the typical input bias current of TL084MJB at 25°C?
The typical input bias current of TL084MJB at 25°C is 65–200 pA, with a maximum of 20 nA over the full –55°C to +125°C temperature range. This ultra-low bias current preserves signal integrity in high-impedance applications such as photodiode transimpedance amplifiers and piezoelectric sensor buffers, where leakage-induced errors would otherwise dominate measurement accuracy.
Can TL084MJB drive capacitive loads up to 300 pF?
Yes, TL084MJB is characterized to safely drive capacitive loads up to 300 pF while maintaining stability and phase margin >56°, as confirmed in TI's SLOS081O datasheet Section 5.7. This capability allows direct connection to ADC input filters and long PCB traces without external isolation resistors - simplifying layout in high-density motor control boards where TL084MJB conditions current-sense signals before digitization.
Is TL084MJB pin-compatible with other TL084 variants in CDIP-14 package?
Yes, TL084MJB shares identical pinout and footprint with TL084MJ and TL084J in the J (CDIP-14) package. All three devices use the same 14-pin dual-in-line ceramic configuration with matching terminal assignments per Table 4-5 and Table 4-6 of the datasheet - enabling drop-in replacement in legacy designs qualified to MIL-STD-883 without PCB modification.
TL084MJB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 4
- Output Type:
- Push-Pull
- 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CDIP
TL084MJB FAQ
1.How can I place an order for TL084MJB through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084MJB 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 TL084MJB reliable?
The price and inventory of TL084MJB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084MJB is usually 5 days.
3.What payment methods are accepted for TL084MJB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084MJB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084MJB?
TL084MJB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084MJB 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 TL084MJB?
For technical support, including TL084MJB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084MJB requirements.
6.How does Aetrix verify that TL084MJB is sourced from the original manufacturer or authorized distributors?
All TL084MJB 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 TL084MJB meets industry standards.
7.What is the process for return or replacement of TL084MJB?
All TL084MJB units undergo pre-shipment inspection (PSI). If there is an issue with TL084MJB, 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 TL084MJB part is unused and in its original packaging.
Return procedure for TL084MJB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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