Texas Instruments OPA552FA/500

Overview

OPA552FA/500 from Texas Instruments is a high-voltage, high-current operational amplifier optimized for noninverting or inverting configurations with gain ≥5, delivering 200 mA continuous output current, 24 V/µs slew rate, and 12 MHz bandwidth at ±30 V supply - used in precision servo drivers, high-fidelity audio output stages, and transducer excitation circuits requiring rail-to-rail swing capability.

For engineers reviewing the OPA552FA/500 datasheet, OPA552FA/500 pinout, OPA552FA/500 application, or OPA552FA/500 equivalent, key selection criteria include thermal shutdown flag functionality, ±4 V to ±30 V supply flexibility, output current limiting (±380 mA short-circuit), wide common-mode range (V– +2.5 V to V+ –2.5 V), and SOIC-8 package compatibility with industrial temperature operation (–40°C to +125°C).

Technical Context

The OPA552FA/500 implements a laser-trimmed monolithic architecture with fully differential input stage, high-slew-rate voltage amplifier core, and robust high-current output stage capable of sourcing/sinking 200 mA continuously. Its internal thermal shutdown circuit activates at ~160°C junction temperature and resets at ~140°C, signaled via dedicated Flag pin sourcing 120 µA typical during fault.

Unlike the unity-gain-stable OPA551, the OPA552FA/500 is internally compensated for minimum stable gain of 5, enabling higher bandwidth (12 MHz) and faster settling (2.2 µs at 0.1% for G = 5). It features integrated input clamp diodes, output current limiting (~380 mA), and rail-swing capability within 3 V of either supply at full load.

Key Specifications

Pinout & Package

OPA552FA/500 is packaged in an 8-pin SOIC (SOIC-8) with body size 4.9 mm × 3.91 mm. The exposed pad is not present; thermal dissipation relies on PCB copper area under the package per R_θJB = 38.2°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA551FA/500 and OPA547T, the OPA552FA/500 uniquely balances high-speed performance (12 MHz, 24 V/µs), integrated thermal flag monitoring, and SOIC-8 manufacturability - making it optimal for space-constrained servo and audio designs needing deterministic fault reporting and minimal external components.

Availability

OPA552FA/500 is available at Aetrix Electronics and suitable for servo drivers, audio amplifiers, transducer excitation, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA552FA/500 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and communications product portfolios.

The OPA552FA/500 belongs to TI's OPA55x high-voltage, high-current op-amp family, designed specifically for applications demanding robust output drive, thermal intelligence, and precision DC performance in harsh environments.

FAQ

What is the minimum recommended gain for stable operation of the OPA552FA/500?

The OPA552FA/500 is internally compensated for minimum stable gain of 5. Operation below G = 5 requires external compensation (e.g., capacitor network in Figure 31) to maintain phase margin. At G = 1, uncompensated use results in oscillation; the datasheet confirms instability in small-signal step response without CS/CF network. Always verify stability with actual load and layout.

Does the OPA552FA/500 support single-supply operation?

Yes - the OPA552FA/500 supports single-supply operation when the input common-mode range (V– +2.5 V to V+ –2.5 V) and output swing (within 3 V of rails) are respected. For example, with V+ = +30 V and V– = 0 V, valid input range is +2.5 V to +27.5 V and output swings from +3 V to +27 V. Input bias current remains low (±20 pA typ), preserving accuracy.

How does the Flag pin on the OPA552FA/500 function during thermal shutdown?

During normal operation, the Flag pin sources <50 nA. When junction temperature reaches ~160°C, the internal thermal shutdown circuit activates and the Flag pin sources 80–160 µA (typical 120 µA) into an external pull-down resistor. This current creates a logic-high voltage at a microcontroller GPIO, enabling immediate system-level fault response without software polling.

Can the OPA552FA/500 drive capacitive loads without oscillation?

Yes - the OPA552FA/500 can drive capacitive loads up to 10 nF stably when configured with external compensation (e.g., CS = 1.8 nF, CF = 208 pF as shown in Figure 31). Without compensation, instability occurs at G < 5 or with >100 pF loads. Figure 19 confirms <5% overshoot with 10 nF at G = –8, validating design margin for reactive transducer interfaces.

What is the maximum continuous output current specification for the OPA552FA/500?

The OPA552FA/500 delivers ±200 mA continuous output current into resistive loads at TJ ≤ 125°C with ±30 V supply. Short-circuit current is ±380 mA (typical), but continuous operation above ±200 mA requires forced-air cooling or heatsinking due to power dissipation limits. Derating curves in Figure 11 show current reduction above 85°C ambient.