Texas Instruments OPA2310IDGKR

Overview

OPA2310IDGKR from Texas Instruments is a dual-channel, rail-to-rail input/output operational amplifier optimized for low-voltage (1.5V–5.5V), high-output-current (±150mA typical at 5.5V), fast-shutdown (0.9µs enable time) applications such as LED drivers, 4–20mA loop transmitters, and low-side current sensing circuits.

For engineers reviewing the OPA2310IDGKR datasheet, OPA2310IDGKR pinout, OPA2310IDGKR application, or OPA2310IDGKR equivalent, key selection criteria include its 3MHz gain-bandwidth product, ±250µV typical input offset voltage, 165µA/ch quiescent current, –40°C to 125°C operating range, and robust ESD protection (±4kV HBM).

Technical Context

The OPA2310IDGKR implements a unity-gain-stable, internally compensated voltage-feedback architecture with integrated RFI/EMI filtering on input pins and fail-safe inputs (no diode to V+). Its output stage delivers ±150mA short-circuit current at 5.5V while maintaining rail-to-rail swing-within 10mV of rails at 10kΩ load-and drives up to 250pF capacitive loads without sustained oscillation.

It operates across 1.5V–5.5V single-supply or split-supply configurations, supports full common-mode input range (including beyond rails), and features thermal shutdown and internal current limiting. The device exhibits 16nV/√Hz input voltage noise density at 1kHz and 75dB EMIRR at 1.8GHz.

Key Specifications

Pinout & Package

OPA2310IDGKR is packaged in an 8-pin SOIC (D) package (4.9mm × 6mm) with exposed thermal pad connected to V– for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2322IDR and TLV9062IDR, the OPA2310IDGKR uniquely combines ±150mA output, fail-safe inputs, and sub-1µs shutdown enable-making it the only choice for robust, high-current, low-voltage optical and industrial current-loop designs requiring field resilience.

Availability

OPA2310IDGKR is available at Aetrix Electronics and suitable for optical transceiver modules, 4–20mA industrial transmitters, and LED driver circuits requiring stable component supply, extended temperature operation, and high-output-current capability.

Supply support for OPA2310IDGKR 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 company delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The OPAx310 family was designed specifically for low-voltage, high-output-current applications including optical biasing, programmable current sources, and precision current sensing-emphasizing robustness, rail-to-rail operation, and fast power-state transitions.

FAQ

What is the maximum capacitive load the OPA2310IDGKR can drive without oscillation?

The OPA2310IDGKR can drive up to 250pF of capacitive load without sustained oscillations under unity-gain conditions with RL = 10kΩ to VS/2. This eliminates the need for external isolation resistors in applications like LCD segment driving or DAC output buffering, provided layout follows recommended grounding and decoupling practices.

Does the OPA2310IDGKR support true rail-to-rail input when powered from 1.5V?

Yes, the OPA2310IDGKR supports rail-to-rail input operation down to 1.5V supply. Its common-mode input range extends from (V–) – 0.1V to (V+) + 0.1V at 5.5V, and from (V–) to (V+) at 1.8V - fully covering the supply rails at minimum 1.5V operation, enabling direct interface with low-voltage sensors and references.

What is the thermal resistance (RθJA) of the OPA2310IDGKR in its SOIC-8 package?

The OPA2310IDGKR in the SOIC-8 (D) package has a junction-to-ambient thermal resistance (RθJA) of 139.0°C/W, as specified in the official datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves significantly with proper PCB copper pour and thermal pad connection to V–.

Can both amplifiers in the OPA2310IDGKR be used independently with different supply voltages?

No, both amplifiers in the OPA2310IDGKR share a single V+ and V– supply pair. They cannot operate from independent supplies. However, each channel has fully isolated input and output paths, allowing independent signal routing, gain configurations, and load connections while sharing the same power domain.

Is the OPA2310IDGKR pin-compatible with any other Texas Instruments op-amps?

No, the OPA2310IDGKR is not pin-compatible with other TI op-amps in SOIC-8. Its pinout (OUT1, IN1–, IN1+, V–, IN2+, IN2–, OUT2, V+) is unique to the OPAx310 dual family. Substitution requires schematic and layout revision - unlike generic SOIC-8 op-amps, this part's channel ordering and thermal pad integration are specific to its high-current architecture.