Texas Instruments OPA567AIRHGTG4

Overview

OPA567AIRHGTG4 from Texas Instruments is a rail-to-rail input/output, 2A high-current operational amplifier designed for precision linear power boosting in low-voltage (2.7V–5.5V) industrial systems. It delivers ±2A continuous output current, achieves 300mV output swing from rails at full load, features user-adjustable current limiting via external resistor, and integrates independent enable control and dual fault flags (IFLAG/TFLAG). It serves as a thermoelectric cooler or laser diode pump driver in closed-loop analog power stages.

For engineers reviewing the OPA567AIRHGTG4 datasheet, OPA567AIRHGTG4 pinout, OPA567AIRHGTG4 application, or OPA567AIRHGTG4 equivalent, key selection criteria include its 2A output capability with rail-to-rail I/O, thermal/current flag signaling, programmable ±0.2A–±2.2A current limit, shutdown-enabled high-impedance output, and QFN-12 package with exposed thermal pad for industrial temperature operation (–40°C to +85°C).

Technical Context

The OPA567AIRHGTG4 employs a complementary rail-to-rail input stage (N- and P-channel differential pairs) enabling common-mode voltage range from (V–) – 0.1V to (V+) + 0.1V, and a class-AB output stage delivering 300mV rail swing at ±2A. Its unity-gain stable architecture maintains >90dB open-loop gain at 4.7V output swing into 1.15Ω, with 1.2MHz GBW and 1.2V/µs slew rate.

Current limiting is implemented via an internal 9800× transconductance circuit referenced to a stable 1.18V VSET at the ISET pin; thermal protection triggers TFLAG low at +147°C junction temperature with +17°C hysteresis. Both IFLAG and TFLAG are active-low CMOS-compatible outputs capable of sourcing/sinking 25µA.

Key Specifications

Pinout & Package

The OPA567AIRHGTG4 is housed in a thermally enhanced 5mm × 5mm QFN-12 package with exposed thermal pad (PowerPAD™), supporting efficient heat transfer to PCB ground plane and enabling compact industrial layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA567AIRHGTG4, OPA569IDWP adds diagnostic and paralleling features at the cost of size and power, while LM675T/NOPB trades modern features for raw high-voltage current drive-neither is pin-compatible, making OPA567AIRHGTG4 optimal for space-constrained, low-voltage industrial power amplification with embedded protection.

Availability

OPA567AIRHGTG4 is available at Aetrix Electronics and suitable for thermoelectric cooler drivers, laser diode pump circuits, and industrial actuator control systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for OPA567AIRHGTG4 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 amplifiers and power management ICs.

The OPA567AIRHGTG4 belongs to TI's high-current operational amplifier product line, engineered specifically for industrial linear power boosting applications demanding rail-to-rail operation, integrated protection, and compact thermal packaging.

FAQ

What is the maximum continuous output current of the OPA567AIRHGTG4?

The OPA567AIRHGTG4 delivers ±2.4A maximum continuous output current under specified thermal conditions (θJA = 38°C/W, ambient ≤+85°C). At ±2A load, output swing remains within 300mV of both supply rails. Derating applies above +85°C case temperature; safe operating area curves in the datasheet must be consulted for pulsed or high-duty-cycle loads.

How is the current limit set on the OPA567AIRHGTG4?

The OPA567AIRHGTG4 current limit is set externally via resistor RSET connected between the ISET pin (6) and V–. The relationship is ILIMIT = 9800 × (1.18V / RSET), supporting ±0.2A to ±2.2A. For example, 11.5kΩ yields ±1.0A. Accuracy is typically ±3%, with worst-case ±15% due to internal matching; calibration is possible using VSET tolerance data.

Does the OPA567AIRHGTG4 support single-supply operation?

Yes, the OPA567AIRHGTG4 operates from a single +2.7V to +5.5V supply, with rail-to-rail input common-mode range extending 100mV beyond both rails and output swing within 300mV of rails at full load. In single-supply mode, V– is tied to ground, and ENABLE logic thresholds align directly with 0V/3.3V or 0V/5V digital signals.

What is the function of the TFLAG and IFLAG pins on the OPA567AIRHGTG4?

TFLAG is an active-low thermal flag asserting at +147°C junction temperature and clearing at +130°C; IFLAG is an active-low current limit flag indicating output clamping. Both sink/source 25µA and interface directly with logic inputs. TFLAG can be wired to ENABLE for autonomous thermal shutdown, while IFLAG enables real-time overcurrent detection in safety-critical systems.

What package type does the OPA567AIRHGTG4 use, and why is it significant?

The OPA567AIRHGTG4 uses a 5mm × 5mm QFN-12 package with exposed thermal pad (PowerPAD™). This package enables low θJC = 6°C/W thermal resistance, facilitating efficient heat transfer to the PCB ground plane. Its compact size supports high-density industrial layouts, while the thermal pad improves reliability under sustained 2A loads-critical for TEC and laser driver applications.