Texas Instruments OPA365AID

Overview

OPA365AID from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for high-speed, low-distortion signal conditioning in single-supply systems. It delivers 50 MHz gain bandwidth, 25 V/µs slew rate, and 0.0004% THD+N at 1 kHz - enabling precision driving of sampling ADCs in data acquisition and audio front-ends.

For engineers reviewing the OPA365AID datasheet, OPA365AID pinout, OPA365AID application, or OPA365AID equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in sensor amplification and active filtering, and two validated alternative op-amps with documented functional trade-offs.

Technical Context

The OPA365AID employs a proprietary zerø-crossover distortion topology that eliminates input stage crossover nonlinearity across the full rail-to-rail common-mode range (V− − 0.1 V to V+ + 0.1 V), ensuring consistent 100 dB minimum CMRR and <100 µV offset voltage over temperature. Its regulated charge-pump internal biasing enables stable operation down to 2.2 V supply while maintaining 4.5 nV/√Hz noise density at 100 kHz.

This architecture supports fast settling (300 ns to 0.01%) and robust capacitive load drive up to 1 nF in unity-gain configuration - critical for anti-aliasing filter stages and ADC driver interfaces where phase margin and transient fidelity are design-critical.

Key Specifications

Pinout & Package

OPA365AID is packaged in an 8-pin SOIC (D package), with pins 1, 5, and 8 designated as no-connect (NC) terminals. The device uses standard SOIC-8 footprint (5.3 mm × 6.2 mm, 1.27 mm pitch) and supports reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-distortion op-amp applications.

Compared with TLV365IDR and OPA365AIDBVR, the OPA365AID offers the optimal balance of SOIC-8 manufacturability, proven thermal performance (140.1°C/W), and guaranteed 100 dB CMRR - making it the preferred choice for production-grade data acquisition modules requiring long-term stability and assembly compatibility.

Availability

OPA365AID is available at Aetrix Electronics and suitable for data acquisition, industrial process control, and audio signal conditioning requiring stable component supply across extended temperature ranges (−40°C to +125°C) and multi-year production cycles.

Supply support for OPA365AID 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 expertise in precision op-amps and signal-chain solutions.

The OPA365AID belongs to TI's zerø-crossover op-amp product line, engineered specifically for high-fidelity, single-supply applications demanding ultra-low distortion, rail-to-rail operation, and fast settling - such as ADC drivers and audio preamplifiers.

FAQ

What is the maximum capacitive load the OPA365AID can drive stably in unity-gain configuration?

The OPA365AID remains stable with pure capacitive loads up to 1 nF in unity-gain (G = +1) configuration, as confirmed by TI's Figure 7-15 and Section 8.3.3. For loads exceeding 1 nF, stability can be restored using a 10–20 Ω series resistor at the output or by increasing closed-loop gain. This capability makes the OPA365AID suitable for driving ADC input capacitors and anti-aliasing filter stages without oscillation risk.

Does the OPA365AID support true rail-to-rail input voltage range including beyond the supply rails?

Yes, the OPA365AID supports a common-mode input voltage range from V− − 0.1 V to V+ + 0.1 V - explicitly extending 100 mV beyond both supply rails. This is enabled by its zerø-crossover topology and is verified in Section 8.3.1 and Figure 8-1. In a 3.3 V system, this allows inputs from −0.1 V to +3.4 V, critical for interfacing with sensors whose output may slightly exceed the supply.

What is the quiescent current of the OPA365AID and how does it vary with supply voltage?

The OPA365AID draws 4.6 mA typical quiescent current per amplifier, with a maximum of 5 mA over temperature (−40°C to +125°C). As shown in Figure 7-10, I_Q increases slightly from ~4.5 mA at 2.2 V to ~4.75 mA at 5.5 V, remaining highly stable across its 2.2–5.5 V operating range - enabling predictable power budgeting in battery-powered instrumentation.

Can the OPA365AID achieve true 0 V output in single-supply operation?

Yes - the OPA365AID can reach 0 V output (and slightly below) in single-supply mode using an external pulldown resistor (e.g., 10 kΩ) to a negative voltage (e.g., −5 V), as detailed in Section 8.3.4 and Figure 8-4. This technique leverages its specially designed CMOS output stage and requires ~500 µA pulldown current. Note that open-loop gain and bandwidth decrease slightly under this condition.

Is the OPA365AID specified for operation over the full automotive temperature range?

Yes, the OPA365AID is fully specified from −40°C to +125°C ambient temperature, meeting AEC-Q100 stress test requirements for Grade 1 automotive applications. Key parameters including offset voltage (100 µV max), CMRR (100 dB min), and gain bandwidth (50 MHz) are guaranteed across this range, making it suitable for engine control, cabin sensor, and ADAS subsystems.