Texas Instruments TL084BCDR

Overview

TL084BCDR from Texas Instruments is a quad JFET-input operational amplifier optimized for precision AC/DC signal conditioning in industrial and audio systems. It delivers 20 V/μs slew rate, 5.25 MHz gain-bandwidth product, ±1 mV input offset voltage (typ), 125 dB open-loop gain, and operates from ±2.25 V to ±20 V supplies. It serves as the core amplification stage in pro-audio mixer channel strips.

For engineers reviewing the TL084BCDR datasheet, TL084BCDR pinout, TL084BCDR application, or TL084BCDR equivalent, this page provides verified electrical specifications, SOIC-14 package layout, real-world use cases in UPS and motor drive feedback loops, and validated alternative options with documented functional trade-offs.

Technical Context

The TL084BCDR uses high-impedance JFET differential input stages 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 ≥56° phase margin into 20 pF capacitive loads.

It features integrated EMI/RF filters and 1.5 kV HBM ESD protection, supporting reliable operation across –40°C to 85°C ambient. The device maintains low THD+N (0.00012% typ at 1 kHz) and 37 nV/√Hz input voltage noise, making it suitable for high-fidelity analog signal paths where distortion and noise floor are critical.

Key Specifications

Pinout & Package

TL084BCDR is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm width, with standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad JFET-input operational amplifier applications.

Compared with TL084CDR, TL084BCDR offers tighter offset and drift specs for DC-stable designs; versus OPA4134UA, it trades noise and distortion performance for significantly lower power and proven ruggedness in industrial UPS and solar environments.

Availability

TL084BCDR is available at Aetrix Electronics and suitable for solar inverter signal conditioning, pro audio mixer channel strips, three-phase UPS feedback loops, and battery test equipment requiring stable component supply across extended production lifecycles.

Supply support for TL084BCDR 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-amp design and manufacturing.

The TL084BCDR belongs to TI's TL08xx FET-input op-amp family, engineered for cost-sensitive industrial, audio, and power-conversion applications demanding high slew rate, low input bias, and robust ESD/EMI performance.

FAQ

What is the maximum capacitive load the TL084BCDR can drive while remaining stable?

The TL084BCDR is characterized for stable operation with up to 300 pF capacitive load on any output, provided proper PCB layout practices are followed-including local 0.1 μF bypass capacitors at VCC+ and VCC– pins, and minimized trace length between output and load. For loads >20 pF, phase margin remains ≥56°, ensuring monotonic step response without ringing.

Does the TL084BCDR support single-supply operation?

Yes, the TL084BCDR supports true single-supply operation from 4.5 V to 40 V. Its common-mode input voltage range extends to VCC+, allowing input signals referenced to ground-critical for interfacing with microcontroller ADCs or sensors in 3.3 V or 5 V systems. However, output swing is limited to within ~115 mV of each rail under light load.

How does the TL084BCDR's input offset voltage compare to the TL084CDR variant?

The TL084BCDR has a typical input offset voltage of ±1 mV (max ±4 mV), whereas the TL084CDR is specified at ±3 mV (max ±10 mV). This tighter offset specification makes TL084BCDR preferable in DC-coupled applications such as precision current sensing or integrator circuits where accumulated offset error directly impacts long-term accuracy.

Is the TL084BCDR pin-compatible with other TL084 variants in SOIC-14 packages?

Yes, all TL084x variants-including TL084ACDR, TL084BCDR, TL084CDR, and TL084IDR-in SOIC-14 (D) package share identical pinout, footprint, and electrical interface. This allows direct substitution within the same PCB layout, though performance parameters (offset, drift, noise) differ across grades.

What thermal derating applies to the TL084BCDR in SOIC-14 package at 85°C ambient?

In SOIC-14 (D) package, the TL084BCDR has a junction-to-ambient thermal resistance (RθJA) of 114.2°C/W. At 85°C ambient and 4.5 V supply, total quiescent power is ~3.8 mW per amplifier (0.94 mA × 4.5 V), so junction temperature rise is ~1.7°C-well within the 125°C max rating. No derating is required for standard operation at this temperature.