Texas Instruments TL081ACD

Overview

TL081ACD from Texas Instruments is a single-channel JFET-input operational amplifier optimized for precision DC-coupled and wideband AC applications. It delivers 5.25 MHz gain-bandwidth, 20 V/μs slew rate, ±13.5 V output swing (RL ≥ 10 kΩ), low 37 nV/√Hz input voltage noise at 1 kHz, and operates from ±2.25 V to ±20 V supplies. It is widely used in audio preamplifiers, sensor signal conditioning, and industrial instrumentation.

For engineers reviewing the TL081ACD datasheet, TL081ACD pinout, TL081ACD application, or TL081ACD equivalent, key selection criteria include input offset voltage (max 10 mV), common-mode input range extending to VCC+, quiescent current (1.4–2.5 mA), EMI rejection ratio (53 dB at 1 GHz), and SOIC-8 package compatibility with legacy TL071/TL081 footprints.

Technical Context

The TL081ACD uses a high-impedance JFET differential input stage enabling ultra-low input bias current (65–200 pA) and high common-mode rejection (75–100 dB). Its internal compensation ensures unity-gain stability with capacitive loads up to 300 pF while maintaining 56° phase margin.

It supports rail-to-rail common-mode input (VCM = –12 V to +15 V at ±15 V supply) but not rail-to-rail output - positive/negative headroom is 115–215 mV at RL = 10 kΩ. The device features short-circuit protection and operates across 0°C to 70°C ambient temperature.

Key Specifications

Pinout & Package

TL081ACD is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, surface-mount compatible with standard 1.27 mm pitch PCB footprints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL071CD and OPA2134PA, TL081ACD offers superior common-mode input range (to VCC+) and robustness in industrial environments, at lower cost - making it optimal for general-purpose precision amplification where moderate noise and offset are acceptable.

Availability

TL081ACD is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio preamplifiers, and battery test equipment requiring stable component supply and long-term manufacturing continuity.

Supply support for TL081ACD 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TL081ACD belongs to TI's legacy JFET-input op-amp family, designed for cost-sensitive, medium-performance applications demanding high input impedance, wide supply range, and proven reliability in instrumentation and audio systems.

FAQ

What is the maximum operating temperature range for TL081ACD?

The TL081ACD is rated for operation from 0°C to +70°C ambient temperature, as defined in its "C-grade" specification. This commercial temperature range makes it suitable for indoor industrial controls, test equipment, and consumer audio products where environmental extremes are not expected. The device's electrical characteristics - including input offset voltage, CMRR, and gain-bandwidth - are guaranteed across this full range.

Does TL081ACD support single-supply operation?

Yes, TL081ACD supports single-supply operation with appropriate biasing. Its common-mode input range extends to VCC+, allowing the non-inverting input to be biased at mid-supply (e.g., 2.5 V on a 5-V rail) while accepting signals referenced to ground. However, output swing does not reach the rails - expect ~115 mV headroom from each supply. For true single-supply applications, external level-shifting or rail-to-rail output op-amps may be required.

What is the input offset voltage specification for TL081ACD?

The TL081ACD has a maximum input offset voltage of 10 mV at 25°C, with a worst-case value of 13 mV across its full 0°C to +70°C operating range. This parameter directly impacts DC accuracy in precision amplification circuits - for example, in a gain-of-100 configuration, a 10-mV offset produces a 1-V output error. Applications requiring tighter DC performance should consider trimming or selecting higher-grade variants like TL081BCD (6 mV max).

Can TL081ACD drive capacitive loads?

Yes, TL081ACD is specified to drive up to 300 pF capacitive load while maintaining stability and 56° phase margin. This capability supports direct connection to ADC input capacitors, long PCB traces, or coaxial cables without external isolation resistors. For loads exceeding 300 pF, a series resistor (e.g., 22 Ω–100 Ω) between the output and capacitance is recommended to prevent peaking or oscillation.

Is TL081ACD pin-compatible with other TL081 variants?

Yes, TL081ACD is fully pin-compatible with all TL081x variants in the SOIC-8 (D) package, including TL081CD, TL081BCD, and TL081HCD. All share identical pinout (IN–, IN+, OUT, VCC–, VCC+), footprint, and mounting dimensions. Performance differences - such as offset voltage, noise, or temperature grade - do not affect mechanical or electrical interconnectability, enabling drop-in replacement in existing designs.