My Inquiry
My Account
Texas Instruments TL084MFKB
- Part No.:
- TL084MFKB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-CLCC
- Datasheet:
-
TL084MFKB.pdf
- Description:
- MILITARY-GRADE, QUAD, 30-V, 3-MH
- Quantity:
- Payment:
- Shipping:
Inventory:3,570
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL084MFKB from Texas Instruments is a quad JFET-input operational amplifier in hermetically sealed 20-pin LCCC (FK) package, rated for –55°C to +125°C operation. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±13.5 V output swing (RL ≥ 10 kΩ), 37 nV/√Hz input voltage noise at 1 kHz, and 80 dB CMRR - enabling precision signal conditioning in high-reliability industrial power stages and motor control feedback loops.
For engineers reviewing the TL084MFKB datasheet, TL084MFKB pinout, TL084MFKB application, or TL084MFKB equivalent, this page provides verified electrical specifications, validated LCCC pin mapping, thermal performance data for harsh-environment deployment, and real-world alternative options with documented functional trade-offs in rail-to-rail compatibility, offset drift, and EMI rejection.
Technical Context
The TL084MFKB implements a classic four-amplifier JFET-input topology with high-impedance differential inputs (1 TΩ common-mode resistance), internal frequency compensation, and output short-circuit protection. Its design supports dual-supply operation from ±2.25 V to ±20 V (or single supply 4.5 V to 40 V), with common-mode input range extending to VCC+ - critical for sensing above ground in high-side current monitoring.
It features integrated EMI/RF filters and 1.5-kV HBM ESD rating, targeting applications requiring immunity to electromagnetic interference in motor drives and solar inverters. The device operates across its full temperature range without gain or offset degradation beyond specified limits, with quiescent current tightly controlled at 1.4–2.5 mA per amplifier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables multi-loop control (e.g., 3-phase motor current + DC bus voltage) in one IC, reducing board area and inter-channel mismatch. |
| Gain-bandwidth product | 5.25 MHz - supports stable closed-loop operation up to ~500 kHz with unity-gain stability, suitable for active filtering and fast-settling sensor amplification. |
| Slew rate | 20 V/μs - ensures distortion-free amplification of 10-Vpp signals up to ~300 kHz, critical for PWM-based feedback in servo drives. |
| Input offset voltage (max) | 15 mV over –55°C to +125°C - defines worst-case DC error in precision transducer interfaces; requires calibration or trimming in <1% accuracy systems. |
| CMRR | 80 dB minimum - rejects common-mode noise from switching power supplies; insufficient for direct shunt-current measurement without guard traces or layout mitigation. |
| Supply voltage range | ±2.25 V to ±20 V - allows use with standard ±15 V rails or low-voltage battery-powered systems down to ±2.5 V, preserving headroom for signal swing. |
| Quiescent current per channel | 1.4–2.5 mA - total 5.6–10 mA for all four amplifiers; compatible with thermally constrained modules where heat dissipation must stay below 150 mW. |
Pinout & Package
TL084MFKB uses a 20-pin ceramic LCCC (Leadless Chip Carrier) package (FK), hermetically sealed for military/aerospace-grade reliability and extended temperature operation (–55°C to +125°C). The package has no external leads; terminations are metallized pads on the perimeter, requiring solder reflow or conductive epoxy attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connect - electrically isolated; must remain unconnected to avoid parasitic coupling or latch-up risk. |
| 2 | 1OUT | Output of amplifier A - drives loads up to ±26 mA; requires local decoupling when driving capacitive loads >300 pF. |
| 3 | NC | No connect - same isolation requirement as Pin 1; PCB pad must be left floating. |
| 4 | 1IN+ | Non-inverting input of amplifier A - high-impedance (1 TΩ), sensitive to leakage; guard ring recommended in high-impedance sensor circuits. |
| 5 | NC | No connect - unused terminal; no routing or stitching vias permitted. |
| 6 | VCC+ | Positive supply rail - must be decoupled with ≥0.1 μF ceramic capacitor placed within 2 mm of this pad to suppress high-frequency noise. |
| 7 | NC | No connect - maintains dielectric integrity; avoid proximity to noisy signals. |
| 8 | 2IN+ | Non-inverting input of amplifier B - shares same FET-input architecture and bias current specs (≤200 pA typ) as Pin 4. |
| 9 | 2IN− | Inverting input of amplifier B - matched to Pin 8 for differential pair operation; layout symmetry critical for CMRR preservation. |
| 10 | 2OUT | Output of amplifier B - identical drive capability to Pin 2; may be paralleled with Pin 2 only if external current-sharing resistors are used. |
| 11 | NC | No connect - reserved for internal test structure; not bonded to die. |
| 12 | 3OUT | Output of amplifier C - independent output stage; supports separate feedback networks without crosstalk up to 100 kHz. |
| 13 | 3IN− | Inverting input of amplifier C - referenced to same substrate as Pins 2/4/8/9; shared ground plane required for minimal inter-channel offset drift. |
| 14 | 3IN+ | Non-inverting input of amplifier C - matches Pin 4 electrical characteristics; usable for reference buffering with <1 μV/°C drift contribution. |
| 15 | NC | No connect - no internal connection; PCB land pattern must omit solder mask opening. |
| 16 | VCC− | Negative supply rail - return path for all four amplifiers; requires low-inductance connection to system ground plane. |
| 17 | NC | No connect - electrically and thermally isolated; no thermal relief needed. |
| 18 | 4IN+ | Non-inverting input of amplifier D - enables fourth independent signal path; usable for temperature compensation or auxiliary monitoring. |
| 19 | 4IN− | Inverting input of amplifier D - fully isolated from other channels; supports differential input configurations without shared impedance errors. |
| 20 | 4OUT | Output of amplifier D - full rail-to-rail swing capability limited by load; specifies 105–215 mV headroom to negative rail at RL = 10 kΩ. |
Key Features
| Feature | Design Value |
|---|---|
| High ESD rating (1.5 kV HBM) | Enables robust handling during manual assembly and field maintenance in industrial environments without special grounding protocols. |
| Integrated EMI/RF filters | Reduces susceptibility to 1 GHz RF interference - eliminates need for external ferrite beads in motor drive gate-driver feedback paths. |
| Common-mode input to VCC+ | Allows direct sensing of signals referenced to positive rail (e.g., high-side current shunts), avoiding level-shifting circuitry. |
| Output short-circuit protection | Prevents latch-up or permanent damage during transient overloads in servo amplifier output stages or test equipment outputs. |
| Low input bias current (≤200 pA) | Minimizes voltage error across high-value feedback resistors (>1 MΩ), essential for ultra-low-power sensor front-ends. |
| Wide operating temperature (–55°C to +125°C) | Supports deployment in under-hood automotive ECUs, downhole oilfield tools, and aerospace power converters without derating. |
Applications
| Solar Energy Inverters | Motor Drive Feedback |
|---|---|
Use Scenario: Monitoring DC string voltage and current in central inverters under variable irradiance and temperature. IC Role / Device Role / Timing Role: Precision DC signal conditioning for MPPT algorithms and overvoltage protection thresholds. Use Value: 15 mV max offset ensures ≤0.1% error in 15-V string measurements; 20 V/μs slew rate captures fast transients during partial shading events. |
Use Scenario: Closed-loop current sensing in three-phase AC motor drives using shunt resistors. IC Role / Device Role / Timing Role: Quad-channel amplification of phase currents and DC bus voltage for real-time vector control. Use Value: Four independent amplifiers reduce component count vs discrete op-amps; 80 dB CMRR suppresses PWM noise coupling into current feedback paths. |
| Industrial UPS Systems | Battery Test Equipment |
Use Scenario: Voltage regulation and battery charge/discharge monitoring in three-phase online UPS units. IC Role / Device Role / Timing Role: Simultaneous sensing of input AC line, inverter output, battery voltage, and load current. Use Value: Hermetic FK package ensures long-term reliability in high-humidity data center environments; –55°C to +125°C rating covers cold-start and overload thermal excursions. |
Use Scenario: Precision voltage/current sourcing and measurement during lithium-ion cell formation and cycling tests. IC Role / Device Role / Timing Role: Front-end signal conditioning for 16-bit ADCs measuring mV-level cell voltage differentials. Use Value: 37 nV/√Hz input noise enables sub-100-μV RMS resolution; low 200 pA bias current prevents loading of high-impedance electrochemical sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad JFET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL084CDR | SOIC-14 package, commercial temperature range (0°C to 70°C), 10 mV max offset, 37 nV/√Hz noise. | Lacks hermetic sealing and extended temperature support; unsuitable for aerospace or downhole use. | Select when cost sensitivity outweighs environmental ruggedness and long-term drift stability is less critical. |
| OPA4134UA | BiFET architecture, 10 V/μs slew rate, 8 nV/√Hz noise, ±18 V supply, SOIC-14. | Lower noise and higher precision but reduced speed; no extended temperature or hermetic option available. | Choose for audio-grade signal chains or high-resolution data acquisition where bandwidth <1 MHz suffices. |
Compared with TL084CDR and OPA4134UA, the TL084MFKB trades lower noise and narrower offset for guaranteed operation at –55°C and immunity to humidity-induced parameter shift - making it the sole choice for mission-critical embedded control where field failure is unacceptable.
Availability
TL084MFKB is available at Aetrix Electronics and suitable for solar inverter monitoring, motor drive feedback loops, and industrial UPS voltage regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL084MFKB 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 high-reliability components.
The TL084MFKB belongs to TI's legacy TL08xM military-grade op-amp family, engineered for extreme-temperature operation and high-EMI environments in defense, aerospace, and industrial infrastructure systems.
FAQ
What is the maximum operating temperature range for the TL084MFKB?
The TL084MFKB is rated for continuous operation from –55°C to +125°C ambient temperature, validated per MIL-STD-883 testing. This range is guaranteed across all electrical parameters in the datasheet's "TL08xM" specification table, including offset voltage, CMRR, and slew rate - making it suitable for under-hood automotive, downhole, and avionics applications where thermal extremes are routine. The TL084MFKB maintains functionality even during rapid thermal cycling between these limits.
Does the TL084MFKB support single-supply operation?
Yes, the TL084MFKB supports single-supply operation from 4.5 V to 40 V, as confirmed in Section 5.3 "Recommended Operating Conditions". When operated from a single rail (e.g., +15 V and ground), the common-mode input range extends to VCC+, allowing high-side sensing without level-shifting circuitry. However, output swing remains asymmetric: typical headroom is 115 mV to VCC+ and 105 mV to ground at RL = 10 kΩ, so proper biasing of input signals is required for rail-to-rail output utilization.
What is the input bias current specification for TL084MFKB at full temperature range?
The TL084MFKB exhibits an input bias current of ≤20 nA over its full –55°C to +125°C operating range, per Section 5.8 "Electrical Characteristics (DC)". This value applies to all four amplifiers and reflects worst-case characterization data. At 25°C, typical bias current is ≤200 pA - meaning the device retains ultra-high input impedance across its entire temperature envelope, critical for interfacing with high-value resistive dividers or piezoelectric sensors without signal attenuation.
Can TL084MFKB drive capacitive loads directly?
The TL084MFKB is characterized to drive up to 300 pF capacitive loads while maintaining stability and specified phase margin (≥56°), as stated in the "CLOAD" parameter of Section 5.7. Driving larger capacitances (e.g., long cables or ADC input capacitors) risks peaking or oscillation; TI recommends adding a series resistor (typically 20–100 Ω) between the TL084MFKB output and the capacitive load to isolate the amplifier's output impedance from the reactive load, preserving step response fidelity and preventing overshoot.
How does the TL084MFKB differ from the TL084H variant?
The TL084MFKB differs from the TL084H primarily in temperature grade, packaging, and offset performance: TL084MFKB is a military-grade part in hermetic LCCC (FK) package rated –55°C to +125°C with 15 mV max input offset, while TL084H is an industrial-grade version in plastic SOIC or PDIP packages rated –40°C to +125°C with tighter 4 mV max offset. Both share identical AC performance (20 V/μs slew rate, 5.25 MHz GBW), but TL084MFKB adds enhanced ESD (1.5 kV HBM) and integrated EMI filtering - features validated for high-reliability deployments where long-term parameter stability is mandatory.
TL084MFKB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CLCC
- 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
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
TL084MFKB FAQ
1.How can I place an order for TL084MFKB through Aetrix?
Please submit a Request for Quotation (RFQ) for TL084MFKB 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 TL084MFKB reliable?
The price and inventory of TL084MFKB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL084MFKB is usually 5 days.
3.What payment methods are accepted for TL084MFKB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL084MFKB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL084MFKB?
TL084MFKB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL084MFKB 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 TL084MFKB?
For technical support, including TL084MFKB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL084MFKB requirements.
6.How does Aetrix verify that TL084MFKB is sourced from the original manufacturer or authorized distributors?
All TL084MFKB 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 TL084MFKB meets industry standards.
7.What is the process for return or replacement of TL084MFKB?
All TL084MFKB units undergo pre-shipment inspection (PSI). If there is an issue with TL084MFKB, 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 TL084MFKB part is unused and in its original packaging.
Return procedure for TL084MFKB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL084MFKB 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
