Texas Instruments TL084QDR

Overview

TL084QDR from Texas Instruments is a quad JFET-input operational amplifier optimized 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. 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 TL084QDR datasheet, TL084QDR pinout, TL084QDR application, or TL084QDR equivalent, key selection criteria include its quad-channel FET-input architecture, SOIC-14 package, guaranteed 125°C operation, and compatibility with single-supply or split-supply configurations up to 40 V total.

Technical Context

The TL084QDR implements a high-slew-rate JFET-input differential pair with cascode gain stage and Class AB output buffer, enabling fast settling (0.48 μs to 0.01% for 2 V step) and low distortion (0.00012% THD+N). Its input stage supports common-mode voltage up to V_CC+, eliminating need for level-shifting in high-side sensing.

Designed for rugged environments, it features integrated EMI/RF filters, 1.5 kV HBM ESD rating, and thermal performance validated across –40°C to +125°C ambient. Quiescent current is tightly specified at 937.5–1125 μA per amplifier under full supply range.

Key Specifications

Pinout & Package

TL084QDR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with standard JEDEC MS-012AC footprint (5.3 mm × 10.2 mm, 1.27 mm pitch). The package is RoHS-compliant, lead-free, and rated for surface-mount reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL084CDR and OPA4134UA, TL084QDR uniquely balances extended temperature operation, integrated EMI filtering, short-circuit protection, and low-power FET-input performance-making it optimal for cost-sensitive yet rugged industrial signal chains where reliability and consistency are non-negotiable.

Availability

TL084QDR is available at Aetrix Electronics and suitable for solar energy inverters, pro audio mixers, and battery test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL084QDR 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 emphasis on reliability, longevity, and industrial-grade qualification.

The TL08x family was engineered for cost-sensitive precision analog applications demanding JFET-input performance, wide supply range, and robustness in harsh environments-spanning test equipment, audio, and power electronics.

FAQ

What is the maximum supply voltage for TL084QDR?

The TL084QDR supports a total supply voltage range of 4.5 V to 40 V (±2.25 V to ±20 V). Absolute maximum ratings allow up to 42 V for non-NS/PS packages, but recommended operation stays within 40 V to ensure long-term reliability and specified performance across –40°C to +125°C. Exceeding 40 V may degrade offset drift and CMRR specifications.

Does TL084QDR support single-supply operation?

Yes, TL084QDR supports true single-supply operation down to 4.5 V. Its common-mode input range extends to V_CC+, allowing inputs to swing rail-to-rail, and output swing reaches within 105–215 mV of both rails under 10 kΩ load. For optimal performance, bias the input common-mode voltage near mid-supply using a resistor divider or reference.

What is the input bias current specification for TL084QDR?

The TL084QDR exhibits ultra-low input bias current: ±1 pA typical at 25°C (DCK/DBV packages), ≤120 pA over –40°C to +125°C for SOIC-14 (QDR) variants. This enables high-impedance sensor interfacing (e.g., piezoelectric or pH electrodes) without significant voltage error or drift-induced calibration loss.

Is TL084QDR pin-compatible with older TL084 variants?

Yes, TL084QDR uses the industry-standard SOIC-14 pinout defined for the TL084 family and is mechanically and electrically pin-compatible with TL084CDR, TL084IDR, and TL084ACDR. All share identical pin functions (1IN– through 4OUT, V_CC+/V_CC–), enabling drop-in replacement where extended temperature and enhanced ESD/EMI performance are required.

What thermal metrics apply to TL084QDR in SOIC-14 package?

For TL084QDR in SOIC-14 (D package), junction-to-ambient thermal resistance (R_θJA) is 114.2°C/W, junction-to-board (R_θJB) is 70.2°C/W, and junction-to-case (top) is 70.3°C/W. These values assume standard JEDEC 2S2P board layout; adding copper pour under the exposed pad (if present) or thermal vias significantly improves R_θJB.