Texas Instruments TL081CP

Overview

TL081CP from Texas Instruments is a single-channel JFET-input operational amplifier designed for precision analog signal conditioning in industrial and audio systems. It delivers 20 V/μs slew rate, ±15 V supply operation, 105 dB CMRR, 5.25 MHz gain-bandwidth product, and 37 nV/√Hz input voltage noise density at 1 kHz - enabling high-fidelity amplification in pro audio mixers and battery test equipment.

For engineers reviewing the TL081CP datasheet, TL081CP pinout, TL081CP application, or TL081CP equivalent, key selection considerations include its FET-input architecture for ultra-low bias current (≤200 pA), rail-to-rail common-mode input range extending to VCC+, and SOIC-8 package compatibility with legacy PCB layouts requiring stable, low-noise op-amps in ±15 V systems.

Technical Context

The TL081CP uses a dual-JFET input stage followed by a high-gain bipolar output stage, supporting wide supply ranges (±2.25 V to ±20 V) and delivering fast transient response without phase reversal under overload. Its input stage enables common-mode voltage operation up to VCC+ while maintaining low offset drift (±2 µV/°C) and high PSRR (≥100 dB).

Internally compensated for unity-gain stability, it achieves 56° phase margin with 20 pF capacitive load and supports 0.1% settling in 0.56 μs for 2 V step inputs - making it suitable for precision DC-coupled instrumentation and AC-coupled audio paths where distortion must remain below 0.003%.

Key Specifications

Pinout & Package

TL081CP is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard pinout compatible with industry-wide op-amp footprints. The device features no internal offset null pins in this variant (unlike TL081C PS package), simplifying layout for general-purpose use.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with TL081IP and OPA2134PA, the TL081CP offers optimal balance of SOIC-8 manufacturability, proven reliability in industrial environments, and sufficient precision for cost-sensitive audio and power electronics - without requiring layout changes or supply redesign.

Availability

TL081CP is available at Aetrix Electronics and suitable for pro audio mixer channel design, battery test equipment signal conditioning, solar inverter string monitoring, and AC motor drive feedback loops requiring stable component supply and long-term industrial availability.

Supply support for TL081CP 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 experience in high-reliability op-amp design and manufacturing.

The TL081CP belongs to TI's legacy TL08x family - engineered for robust performance in industrial, audio, and power-conversion applications where JFET input, wide supply range, and proven longevity are critical.

FAQ

What is the maximum supply voltage for TL081CP?

The TL081CP supports a total supply voltage (VCC+ to VCC−) of up to ±20 V (40 V differential), with recommended operation between ±2.25 V and ±20 V. Absolute maximum ratings allow 42 V differential for non-continuous stress conditions, but sustained operation above ±20 V risks parametric shift and reduced reliability. Always observe derating guidelines in TI's SLOS081O datasheet for TL081CP.

Does TL081CP have internal offset null capability?

No, the TL081CP in SOIC-8 package does not include offset null pins. Unlike the TL081C variant in PS (SO-8) package which provides OFFSET N1 and OFFSET N2 terminals, the TL081CP uses fixed internal trimming and relies on its 3 mV max input offset voltage specification. For applications requiring sub-millivolt offset, external calibration or a precision op-amp like OPA277 is recommended instead of TL081CP.

Can TL081CP drive capacitive loads reliably?

Yes, TL081CP is characterized to drive up to 300 pF capacitive load while maintaining stability, with 56° phase margin measured at 20 pF. For loads >100 pF, TI recommends adding a small series resistor (10–50 Ω) between the output and capacitor to isolate reactive feedback. This behavior is confirmed in Figure 5-25 (Phase Margin vs Capacitive Load) of the TL081CP datasheet.

What is the input bias current of TL081CP at 25°C?

The TL081CP exhibits input bias current of 65–200 pA at TA = 25°C, with typical value near 100 pA. This ultra-low bias current stems from its JFET differential pair input stage and remains stable across temperature - critical for integrating amplifiers, photodiode transimpedance stages, and high-impedance sensor buffers where leakage would otherwise dominate error.

Is TL081CP RoHS compliant and lead-free?

Yes, TL081CP is manufactured in RoHS-compliant, lead-free packaging per TI's current product definitions. The SOIC-8 package uses matte tin lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) requirements. Full compliance documentation, including material declarations and test reports, is accessible via TI's product folder for TL081CP on ti.com.