Texas Instruments OPA552PA

Overview

OPA552PA from Texas Instruments is a high-voltage, high-current operational amplifier optimized for noninverting or inverting configurations with gain ≥5. It delivers 200 mA continuous output current, 24 V/µs slew rate, 12 MHz gain-bandwidth product, and operates from ±4 V to ±30 V supplies. It is used in precision servo drivers requiring rail-to-rail-capable output swing and thermal fault monitoring.

For engineers reviewing the OPA552PA datasheet, OPA552PA pinout, OPA552PA application, or OPA552PA equivalent, key selection criteria include minimum stable gain (≥5), thermal shutdown flag behavior (120 µA sourcing during shutdown), output voltage swing (±27 V at ±30 V supply), and SOIC-8 package thermal resistance (96.7°C/W).

Technical Context

The OPA552PA implements a laser-trimmed monolithic architecture with a high-current output stage capable of sourcing/sinking 200 mA continuously and 380 mA short-circuit current. Its internal compensation targets stability only at gains ≥5, enabling higher bandwidth (12 MHz) and faster slew rate (24 V/µs) than the unity-gain-stable OPA551.

Thermal protection is implemented via junction-sensing circuitry that disables the output at ~160°C and re-enables it at ~140°C, while driving a dedicated flag pin with 120 µA (typical) during shutdown. Input protection includes internal clamp diodes with 5 mA absolute maximum input current rating.

Key Specifications

Pinout & Package

OPA552PA is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with body size 4.9 mm × 3.91 mm. The exposed pad is not present; thermal dissipation relies on PCB copper area connected to V− via pin 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA552PA, OPA551PA trades bandwidth and slew rate for unconditional stability at unity gain, while OPA547TP adds programmability and higher voltage tolerance at the cost of larger footprint and higher quiescent current (12 mA vs 8.5 mA).

Availability

OPA552PA is available at Aetrix Electronics and suitable for telephony line drivers, high-voltage servo amplifiers, capacitive load test fixtures, and audio power booster stages requiring stable component supply across extended temperature ranges.

Supply support for OPA552PA 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 specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.

The OPA55x family was designed for industrial and test equipment applications demanding high output current, wide supply range, and integrated thermal protection - targeting servo control, transducer excitation, and high-fidelity audio.

FAQ

What is the minimum recommended closed-loop gain for stable operation of the OPA552PA?

The OPA552PA is internally compensated for stable operation only at closed-loop gains of 5 or greater. Using it at gains below 5 - such as unity gain or G = 2 - risks oscillation unless external compensation (e.g., capacitor network per Figure 31 in SBOS100B) is applied. This differs from the OPA551PA, which is unity-gain stable. Always verify stability with actual load conditions and layout parasitics when operating near the minimum gain threshold.

How does the thermal shutdown flag (pin 8) behave on the OPA552PA?

The OPA552PA flag pin sources 120 µA (typical) when junction temperature reaches ~160°C, dropping to <50 nA during normal operation. It is an open-collector output requiring an external pull-up resistor (e.g., 10 kΩ to V+) to generate a logic-high signal for microcontroller interrupt or status LED. The flag remains active until junction cools to ~140°C, providing unambiguous thermal fault detection without external sensing components.

Can the OPA552PA drive a 10-nF capacitive load stably at G = 5?

Yes - the OPA552PA can drive a 10-nF load stably at G = 5 when using the compensation network shown in Figure 28 of SBOS100B: a 1.8 nF capacitor from output to inverting input and a 10 nF capacitor from inverting input to ground. Without this network, phase margin degrades significantly due to pole splitting, leading to overshoot (>20%) or ringing. Verified step response shows <5% overshoot and monotonic settling under these conditions.

What is the maximum continuous output current specification for the OPA552PA in SOIC-8 package?

The OPA552PA delivers ±200 mA continuous output current when mounted on a standard FR-4 PCB with ≥2 in² of 2-oz copper connected to pins 4 (V−) and 7 (V+). This rating assumes ambient temperature ≤+70°C and proper thermal vias. At +125°C ambient, derating applies: maximum continuous current drops to ±130 mA due to junction temperature limits and RθJA = 96.7°C/W. Short-circuit current is ±380 mA but is time-limited by thermal shutdown.

Does the OPA552PA support single-supply operation?

The OPA552PA supports single-supply operation only if the input common-mode range and output swing requirements are met. With V+ = +30 V and V− = 0 V, its input common-mode range is +2.5 V to +27.5 V and output swing is +3.5 V to +26.5 V at 200 mA. It cannot swing near ground or rail - so true rail-to-rail or ground-referenced inputs/outputs require level-shifting circuitry or a negative supply. For true single-supply designs, consider the OPA541 or OPA547 families instead.