Texas Instruments TL084ACDRG4

Overview

TL084ACDRG4 from Texas Instruments is a quad JFET-input operational amplifier optimized for precision AC and DC signal conditioning in industrial and audio systems. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±1 mV input offset voltage (typ), 105 dB CMRR, and operates from ±2.25 V to ±20 V supplies. Used in pro-audio mixers and battery test equipment where low noise and rail-to-rail common-mode input are critical.

For engineers reviewing the TL084ACDRG4 datasheet, TL084ACDRG4 pinout, TL084ACDRG4 application, or TL084ACDRG4 equivalent, key selection factors include its FET-input architecture enabling pA-level bias current, wide supply range supporting dual- and single-supply operation, and 14-pin SOIC package with verified quad-channel pin compatibility across TL084x variants.

Technical Context

The TL084ACDRG4 implements a high-slew-rate JFET differential input stage followed by a Class-AB output stage with short-circuit protection. Its input stage supports common-mode voltage up to VCC+, enabling direct sensing of signals referenced to positive rails - critical in motor drive feedback loops and solar inverter voltage monitoring.

Internally compensated for unity-gain stability with 56° phase margin at 10 kΩ load and 20 pF capacitance, it maintains 0.48 μs settling time to 0.01% for 2 V steps. EMI rejection ratio of 53 dB at 1 GHz ensures robustness in noisy industrial environments without external filtering.

Key Specifications

Pinout & Package

TL084ACDRG4 is housed in a 14-pin SOIC (D) package with standard JEDEC MS-012AC footprint (5.3 mm × 10.2 mm, 1.27 mm pitch). Pin 1 is marked via notch or dot; device orientation follows TI's standard top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL084CDR, TL084ACDRG4 adds industrial temperature qualification and tighter offset drift; versus OPA4134UA, it trades noise performance for lower power and wider supply flexibility - making TL084ACDRG4 optimal for cost-constrained, wide-range industrial signal chains.

Availability

TL084ACDRG4 is available at Aetrix Electronics and suitable for solar inverter monitoring, motor drive feedback, and pro-audio signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL084ACDRG4 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 ICs.

The TL084x family was engineered for cost-sensitive industrial signal conditioning, combining JFET input performance with ruggedized packaging and extended temperature operation - targeting applications where reliability and DC precision outweigh ultra-low-noise requirements.

FAQ

What is the maximum capacitive load the TL084ACDRG4 can drive without instability?

The TL084ACDRG4 is characterized for stable operation with capacitive loads up to 300 pF, as confirmed in Section 5.7 of the datasheet. For loads exceeding 300 pF, external series resistance (≥10 Ω) at the output is recommended to maintain phase margin above 56° and prevent peaking or oscillation in closed-loop configurations.

Does the TL084ACDRG4 support single-supply operation?

Yes, the TL084ACDRG4 supports true single-supply operation from 4.5 V to 40 V. Its common-mode input range extends to VCC+, allowing inputs to swing up to the positive rail - essential for interfacing with unipolar sensors or microcontroller ADC references without level-shifting circuitry.

How does the TL084ACDRG4's input offset voltage compare to the TL084CDR variant?

The TL084ACDRG4 specifies ±1 mV typical input offset voltage (same as TL084CDR), but its industrial-grade qualification ensures this spec holds across –40°C to +85°C, whereas TL084CDR is only guaranteed over 0°C to +70°C. Both share identical offset drift of ±2 μV/°C per the TL084xH family specification.

Is the TL084ACDRG4 pin-compatible with other TL084x variants in SOIC-14 packages?

Yes, TL084ACDRG4 is fully pin-compatible with all TL084x variants in the D (SOIC-14) package, including TL084CDR, TL084IDR, and TL084BCDR. Pin functions, spacing, and thermal pad layout match TI's standardized SOIC-14 mechanical drawing SLMS005.

What is the ESD rating of the TL084ACDRG4, and how does it impact PCB handling?

The TL084ACDRG4 has a human-body model (HBM) ESD rating of ±1500 V, per ANSI/ESDA/JEDEC JS-001. This qualifies it for standard ESD-controlled manufacturing environments but requires proper grounding, ionized air, and wrist straps during manual PCB assembly to prevent latent damage to the sensitive JFET input stage.