Texas Instruments TL084CDRE4

Overview

TL084CDRE4 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 typical input offset voltage, 5.25 MHz gain-bandwidth product, 105 dB common-mode rejection ratio, 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) and rail-to-rail common-mode input (including V_CC+) are critical.

For engineers reviewing the TL084CDRE4 datasheet, TL084CDRE4 pinout, TL084CDRE4 application, or TL084CDRE4 equivalent, this page provides verified electrical specifications, SOIC-14 package details, functional pin mapping, real-world use cases in motor drive feedback and UPS monitoring, and validated alternative options for design continuity.

Technical Context

The TL084CDRE4 implements a high-slew-rate JFET-input stage with integrated EMI/RF filters and output short-circuit protection. Its architecture supports wide common-mode input range extending to V_CC+, enabling direct sensing of signals near the positive supply rail without level-shifting.

It features low input bias current (±1 pA typ), low offset drift (±2 μV/°C), and stable operation into 300 pF capacitive loads - making it suitable for driving cables, filters, and ADC front-ends without external compensation.

Key Specifications

Pinout & Package

TL084CDRE4 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). Thermal resistance R_θJA = 114.2°C/W enables operation up to +85°C ambient without forced airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL084IDR, TL084CDRE4 offers lower cost and sufficient performance for commercial-grade UPS and audio gear; versus OPA4134UA, it trades noise floor for broader supply range, lower power, and higher output drive - aligning with industrial test and motor control priorities.

Availability

TL084CDRE4 is available at Aetrix Electronics and suitable for motor drive feedback circuits, pro audio mixer channels, battery test equipment, and single-phase online UPS systems requiring stable component supply across production lifecycles.

Supply support for TL084CDRE4 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 90 years of innovation in precision amplifiers and power management ICs.

The TL08x family was engineered for cost-sensitive industrial and audio applications requiring JFET-input performance - delivering high slew rate, low offset, and robust ESD immunity without premium pricing.

FAQ

What is the maximum capacitive load TL084CDRE4 can drive stably?

The TL084CDRE4 is characterized for stable operation with up to 300 pF capacitive load without external compensation. This enables direct driving of coaxial cables, anti-aliasing filters, and ADC input capacitors. For loads exceeding 300 pF, a series isolation resistor (typically 20–100 Ω) between the TL084CDRE4 output and the capacitive node is recommended to maintain phase margin above 56°.

Does TL084CDRE4 support single-supply operation?

Yes, TL084CDRE4 supports single-supply operation from 4.5 V to 40 V. Its common-mode input range extends to V_CC+, allowing inputs to swing up to the positive rail. For proper biasing, the non-inverting inputs should be referenced to a mid-supply voltage (e.g., via resistor divider), and output swing will be limited by headroom (typically 115–210 mV from each rail at 10 kΩ load).

What is the input offset voltage specification for TL084CDRE4 over temperature?

TL084CDRE4 has a maximum input offset voltage of ±4 mV at 25°C and ±5 mV over its full operating temperature range (0°C to +70°C). Its offset voltage drift is ±2 μV/°C, meaning total offset variation due to temperature alone is ≤140 μV across the 70°C span - critical for DC-coupled precision measurement paths.

How does TL084CDRE4 compare to TL074 in terms of noise performance?

TL084CDRE4 specifies 37 nV/√Hz input voltage noise density at 1 kHz, while TL074 achieves 18 nV/√Hz under identical conditions. The TL074's lower noise stems from optimized JFET geometry and biasing, but TL084CDRE4 compensates with higher slew rate (20 V/μs vs. 13 V/μs) and superior EMI rejection (53 dB at 1 GHz), making it more robust in electrically noisy industrial environments.

Is TL084CDRE4 pin-compatible with other TL084 variants in SOIC-14 packages?

Yes, TL084CDRE4 is fully pin-compatible with all TL084x variants in the SOIC-14 (D) package, including TL084IDR, TL084CP, and TL084ACDR. Pin functions, spacing, thermal pad absence, and mechanical dimensions conform to JEDEC MO-012AC, enabling drop-in replacement where electrical specs (e.g., temp grade, offset) meet design requirements.