Texas Instruments TL084CDR

Overview

TL084CDR 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, and operates from ±2.25 V to ±20 V supplies. It is used in pro audio mixers and battery test equipment where low noise (37 nV/√Hz at 1 kHz) and rail-to-rail common-mode input (including V_CC+) are critical.

For engineers reviewing the TL084CDR datasheet, TL084CDR pinout, TL084CDR application, or TL084CDR equivalent, key selection considerations include its quad-channel SOIC-14 package, FET-input bias current (<120 pA), output short-circuit protection, and compatibility with single-supply configurations up to 40 V.

Technical Context

The TL084CDR implements a high-slew-rate JFET-input differential pair with internal frequency compensation, enabling stable unity-gain operation with ≤300 pF capacitive load. Its input stage supports common-mode voltages extending to the positive supply rail, eliminating level-shifting requirements in many sensor interface circuits.

Each of the four amplifiers features independent offset voltage trimming capability via external pins (not present in D-package variant), low THD+N (0.00012% at 1 kHz), and integrated EMI/RF filters-critical for noise-sensitive measurement and audio applications operating in electrically harsh environments.

Key Specifications

Pinout & Package

TL084CDR is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) package, surface-mount compatible with standard reflow profiles and IPC-7351B footprint D_14_SOIC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL084IDR and TL074CDR, TL084CDR offers the optimal balance of speed (20 V/μs), robustness (integrated EMI filters, 1.5 kV HBM ESD), and cost for general-purpose industrial signal conditioning-without requiring layout changes or thermal derating at 70°C ambient.

Availability

TL084CDR is available at Aetrix Electronics and suitable for pro audio mixer signal path, battery test equipment, solar string inverter feedback, and AC motor drive current sensing requiring stable component supply across production lifecycles.

Supply support for TL084CDR 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 delivering analog and embedded processing solutions, with over 50 years of op-amp innovation and manufacturing excellence.

The TL08x family was engineered for cost-sensitive, high-reliability analog signal conditioning in industrial, audio, and power-conversion systems-emphasizing speed, precision, and ruggedness without premium pricing.

FAQ

What is the maximum supply voltage for TL084CDR?

The TL084CDR supports a total supply voltage (V_CC+ – V_CC−) up to 40 V, corresponding to ±20 V dual supply or 40 V single-ended operation. Absolute maximum ratings specify 42 V for non-NS/PS packages, but TI recommends staying within 40 V for reliable long-term operation per the Recommended Operating Conditions table.

Does TL084CDR have rail-to-rail output capability?

No, TL084CDR does not feature rail-to-rail output. Its output swing is limited to within 105–215 mV of the negative rail and 115–210 mV of the positive rail under 10 kΩ load. This headroom increases with heavier loads (e.g., 2 kΩ), making it unsuitable for true rail-to-rail applications but adequate for most industrial signal conditioning.

Can TL084CDR operate from a single 5-V supply?

Yes, TL084CDR can operate from a single 5-V supply, but its input common-mode range extends only to (V_CC− + 1.5 V) and (V_CC+) - meaning with V_CC− = 0 V and V_CC+ = 5 V, the usable input range is 1.5 V to 5 V. For full 0–5 V signal handling, level-shifting or a higher supply (e.g., 12 V) is recommended.

Is TL084CDR pin-compatible with TL084CP?

Yes, TL084CDR (SOIC-14) and TL084CP (PDIP-14) share identical pin functions and electrical specifications. The only difference is package type: SOIC is surface-mount, PDIP is through-hole. Layouts must account for different footprints and thermal characteristics, but no circuit redesign is needed for functional replacement.

What is the typical input bias current of TL084CDR at 25°C?

The typical input bias current of TL084CDR at 25°C is ±1 pA, with a maximum of ±120 pA across temperature (–40°C to +70°C). This ultra-low value stems from its JFET input stage and makes it ideal for high-impedance sources such as piezoelectric sensors, photodiode transimpedance amplifiers, and electrometer-grade measurements.