Texas Instruments TL081ACP

Overview

TL081ACP 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, ±1 mV typical input offset voltage, 5.25 MHz gain-bandwidth product, and operates from ±2.25 V to ±20 V supplies. Its rail-to-rail common-mode input range (including V_CC+) supports high-side sensing in solar inverter front-ends.

For engineers reviewing the TL081ACP datasheet, TL081ACP pinout, TL081ACP application, or TL081ACP equivalent, key selection criteria include its FET-input low bias current (±1 pA typ), 37 nV/√Hz input voltage noise at 1 kHz, output short-circuit protection, and compatibility with ±15 V legacy designs while supporting modern wide-supply operation up to ±20 V.

Technical Context

The TL081ACP uses a dual-JFET input stage enabling ultra-low input bias current and high input impedance (>1 TΩ), critical for high-impedance sensor interfaces and integrator circuits. Its internal compensation ensures stable unity-gain operation without external components across capacitive loads up to 300 pF.

It features integrated EMI/RF filters and 1.5 kV HBM ESD rating, allowing direct use in noisy motor drive feedback paths and battery test equipment where transient immunity is essential. The device maintains 118 dB open-loop gain and 100 dB CMRR over –40°C to +125°C, supporting robust performance in unregulated environments.

Key Specifications

Pinout & Package

TL081ACP is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width and standard through-hole mounting. This package provides mechanical robustness and thermal stability for industrial PCBs subject to thermal cycling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL081CDR and OPA2134PA, the TL081ACP uniquely combines through-hole manufacturability, V_CC+-inclusive input range, and 20 V/μs slew rate - making it optimal for industrial test equipment and solar inverter service boards where field-replaceability and high-side sensing coexist.

Availability

TL081ACP is available at Aetrix Electronics and suitable for solar energy string inverters, pro audio mixer designs, and battery test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL081ACP 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 heritage in precision op-amp innovation.

The TL08x family was engineered for cost-sensitive industrial and audio applications demanding JFET-input performance, wide supply tolerance, and ruggedized operation - directly addressing needs in power conversion, test instrumentation, and professional audio infrastructure.

FAQ

What is the maximum operating temperature range for the TL081ACP?

The TL081ACP is rated for operation from –40°C to +85°C ambient temperature, matching the TL081C grade specification. This range supports deployment in commercial and industrial environments such as UPS systems and audio equipment enclosures without forced cooling. The device maintains specified offset voltage drift (±2 µV/°C) and CMRR (≥90 dB) across this full interval, ensuring consistent performance in thermally varying conditions. Always verify thermal derating using the 85°C/W R_θJA value for PDIP packaging.

Does the TL081ACP support single-supply operation?

Yes, the TL081ACP supports single-supply operation from 4.5 V to 40 V total supply voltage (e.g., 0 V and +12 V). Its common-mode input range extends to V_CC+, allowing input signals near the positive rail - critical for high-side sensing. However, output swing is limited to within ~210 mV of each rail under 10 kΩ load, so proper input biasing (e.g., mid-rail reference) is required for rail-to-rail signal handling. The device does not feature rail-to-rail output capability.

How does the TL081ACP differ from the TL081H variant?

The TL081ACP belongs to the TL081C grade (commercial temperature range: 0°C to 70°C), whereas TL081H is the enhanced version rated for –40°C to +125°C with tighter offset voltage (±1 mV typ vs ±3 mV typ for C-grade) and improved noise (37 nV/√Hz vs 18 nV/√Hz for PS/NS packages). Both share identical pinout and SOIC/PDIP package options, but TL081H adds integrated EMI filters and 1.5 kV HBM ESD protection - features absent in the legacy TL081ACP. For new designs requiring extended temperature or EMC robustness, TL081H is preferred.

Can the TL081ACP drive capacitive loads without oscillation?

Yes, the TL081ACP is internally compensated for unity-gain stability and can safely drive capacitive loads up to 300 pF without external isolation resistors. This capability is validated in the datasheet's "Small-Signal Overshoot vs Capacitive Load" curves (Figures 5-23/5-24), which show <5% overshoot at 300 pF with 10 mV steps. For loads exceeding 300 pF, a series resistor (typically 10–50 Ω) between the TL081ACP output and the capacitance restores phase margin and prevents peaking - a standard practice in ADC driver and cable-driving applications.

Is the TL081ACP pin-compatible with other TL081 variants like TL081CP or TL081IP?

Yes, all TL081x variants in PDIP-8 packaging - including TL081CP (plastic DIP, commercial temp), TL081IP (plastic DIP, industrial temp), and TL081ACP - share identical pinout, terminal functions, and mechanical footprint. The suffix denotes temperature grade and process revision, not pin configuration. TL081ACP and TL081CP are functionally interchangeable in commercial-temp applications; TL081IP extends operation to –40°C to +85°C with tighter initial offset (±3 mV max vs ±6 mV for ACP), but all three use the same 8-pin PDIP layout with NC pins at positions 1, 5, and 8.