Texas Instruments OPA2365AIDRG4

Overview

OPA2365AIDRG4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for single-supply, high-speed precision signal conditioning. It delivers 50-MHz gain bandwidth, 25-V/µs slew rate, and 0.0004% THD+N at 1 kHz - enabling clean amplification of fast analog signals in data acquisition front-ends driving 16-bit+ ADCs.

For engineers reviewing the OPA2365AIDRG4 datasheet, OPA2365AIDRG4 pinout, OPA2365AIDRG4 application, or OPA2365AIDRG4 equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in sensor interfaces and active filtering, and two validated alternative parts with documented functional trade-offs.

Technical Context

The OPA2365AIDRG4 implements a zero-crossover distortion topology that eliminates input stage transition 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 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 dual op amp operates with identical per-channel specs as the single OPA365: 4.6-mA typical quiescent current per amplifier, 0.3-µs settling to 0.01%, and output swing within 10 mV of both rails under 10-kΩ load - making it suitable for low-voltage, high-fidelity signal chains where headroom and linearity are critical.

Key Specifications

Pinout & Package

OPA2365AIDRG4 is housed in an 8-pin SOIC (D) package with exposed pad (no thermal pad connection required). Pin numbering follows standard JEDEC SOIC-8 top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2365AIDRG4, OPA2365AIDR offers identical performance in a different packaging variant, while TLV2365IDR trades marginally improved DC drift for equivalent AC performance - making it preferable in temperature-variable precision analog front-ends.

Availability

OPA2365AIDRG4 is available at Aetrix Electronics and suitable for data acquisition systems, industrial process controllers, and portable audio equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OPA2365AIDRG4 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 high-performance op amps and precision signal chain solutions.

The OPAx365 product line was designed specifically for single-supply, high-speed precision applications - including ADC driver stages, active filtering, and sensor signal conditioning - where rail-to-rail operation, ultra-low distortion, and wide bandwidth are mandatory.

FAQ

What is the maximum capacitive load the OPA2365AIDRG4 can drive stably in unity-gain configuration?

The OPA2365AIDRG4 remains stable with pure capacitive loads up to approximately 1 nF in unity-gain (G = +1) configuration, as confirmed by TI's characterization data and Figure 7-15 in the SBOS365G datasheet. For larger loads, adding a 10–20 Ω series resistor at the output reduces overshoot and restores stability, though it introduces minor gain error dependent on load resistance. The OPA2365AIDRG4's internal compensation is optimized for this behavior without external components.

Does the OPA2365AIDRG4 support true rail-to-rail input operation below 2.2 V supply?

No - the OPA2365AIDRG4 is specified for operation from 2.2 V to 5.5 V. Below 2.2 V, parameters such as gain bandwidth, slew rate, and CMRR are not guaranteed. The rail-to-rail input feature (extending 100 mV beyond rails) is fully functional only within the recommended operating range. At 2.2 V, the input common-mode range spans –0.1 V to +2.3 V, enabling true ground-sensing capability in low-voltage systems.

Can the OPA2365AIDRG4 be used to drive a 600-Ω load at full output swing?

Yes - the OPA2365AIDRG4 is characterized to deliver rail-to-rail output swing into 600-Ω loads, with typical output voltage swing within 20 mV of each rail at 5.5-V supply (per Section 7.6 Electrical Characteristics). Figure 7-8 confirms linear output current capability up to ±65 mA, supporting full-scale 4-Vpp signals into 600 Ω without clipping. However, THD+N rises to 0.001% under these conditions due to increased output stage nonlinearity.

What is the input bias current specification for OPA2365AIDRG4 over temperature?

The OPA2365AIDRG4 has a maximum input bias current of ±10 pA at 25°C and ±10 pA over the full –40°C to +125°C range, with typical values near ±0.2 pA. This ultra-low bias current is enabled by its CMOS input stage and remains stable across temperature, making it ideal for high-impedance sensor interfaces like photodiode transimpedance amplifiers where leakage current would otherwise dominate error budgets.

Is the OPA2365AIDRG4 pin-compatible with other dual op amps in SOIC-8 packages?

No - the OPA2365AIDRG4 uses a nonstandard SOIC-8 pinout optimized for dual independent amplifiers: VOUTA/–INA/+INA/V– on left side and +INB/–INB/VOUTB/V+ on right side. It is not pin-compatible with industry-standard dual op amps like LM358 or TL072, which place shared supplies centrally. Layout reuse requires verification against Figure 6-3 in the SBOS365G datasheet; incorrect routing will result in nonfunctional channels.