Texas Instruments OPA552FAKTWTG3

Overview

OPA552FAKTWTG3 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, and 12 MHz gain-bandwidth product across ±4 V to ±30 V supplies, enabling precision servo drive and audio power stages.

For engineers reviewing the OPA552FAKTWTG3 datasheet, OPA552FAKTWTG3 pinout, OPA552FAKTWTG3 application, or OPA552FAKTWTG3 equivalent, key selection criteria include thermal shutdown flag signaling, rail-to-rail output swing (±3 V), SOA-limited capacitive load drive, and DDPAK-7 package thermal performance (R_θJA = 22.7°C/W).

Technical Context

The OPA552FAKTWTG3 implements a laser-trimmed monolithic architecture with fully differential input stage, high-current complementary bipolar output stage, and integrated thermal shutdown circuitry that disables output at ~160°C junction temperature and resets at ~140°C. Its internal current limit caps output at ±380 mA under short-circuit conditions.

Unlike the unity-gain-stable OPA551, the OPA552FAKTWTG3 uses frequency compensation tailored for minimum stable gain of 5 - achieving 12 MHz bandwidth and 24 V/µs slew rate only when configured accordingly. Input protection includes clamp diodes with 5 mA absolute max input current rating.

Key Specifications

Pinout & Package

OPA552FAKTWTG3 is housed in a 7-pin DDPAK/TO-263 surface-mount package with exposed thermal pad connected internally to V−. The package measures 10.1 mm × 8.99 mm and features 22.7°C/W junction-to-ambient thermal resistance, enabling >3 W dissipation with moderate PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA552FAKTWTG3, the OPA551FAKTWTG3 offers broader gain flexibility at lower speed, while the OPA547T adds programmability and higher voltage at the cost of larger footprint and no thermal flag - making OPA552FAKTWTG3 optimal for fixed-gain, thermally monitored, high-speed industrial drivers.

Availability

OPA552FAKTWTG3 is available at Aetrix Electronics and suitable for audio test equipment, servo motion controllers, high-voltage sensor excitation, and telecom line interface circuits requiring stable component supply across extended temperature ranges (−40°C to +125°C).

Supply support for OPA552FAKTWTG3 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, power management, and signal chain solutions.

The OPA55x family was designed specifically for industrial and test equipment applications demanding high-voltage swing, high output current, and integrated protection - targeting systems where reliability under overload and thermal stress is mission-critical.

FAQ

What is the minimum stable gain for OPA552FAKTWTG3?

The OPA552FAKTWTG3 is internally compensated for minimum stable closed-loop gain of 5. Operation below this gain - such as unity-gain follower or G = 2 - risks instability unless external compensation (e.g., noise-gain shaping with CS/CF network) is applied per Figure 31 in the datasheet. This design choice enables its 12 MHz bandwidth and 24 V/µs slew rate.

How does the FLAG pin function on OPA552FAKTWTG3?

The FLAG pin on OPA552FAKTWTG3 is an open-collector current source that outputs <50 nA during normal operation and sources 120 µA (typical) when thermal shutdown activates at ~160°C junction temperature. It requires an external pull-up resistor to logic supply (e.g., 10 kΩ to +5 V) to generate a clean logic-high alert signal compatible with CMOS or HCT inputs.

Can OPA552FAKTWTG3 drive capacitive loads?

Yes, but with strict limits: OPA552FAKTWTG3 remains stable driving ≤10 nF capacitive loads when configured at G ≥ 5. Larger capacitances require external isolation resistors or noise-gain compensation networks (e.g., CS/CF in Figure 28). Uncompensated loads >10 nF cause peaking or oscillation due to reduced phase margin - verified in Figure 19 small-signal overshoot data.

What thermal performance can be expected from the DDPAK-7 package of OPA552FAKTWTG3?

The OPA552FAKTWTG3 in DDPAK-7 (KTW) package has R_θJA = 22.7°C/W, R_θJC(bot) = 0.6°C/W, and R_θJB = 7.7°C/W. With a 4-layer PCB featuring ≥4 cm² copper pour under the tab, it sustains >3 W continuous power dissipation at +125°C ambient. Thermal shutdown triggers at ~160°C junction temperature, providing robust overload protection.

Is OPA552FAKTWTG3 pin-compatible with OPA551FAKTWTG3?

Yes - OPA552FAKTWTG3 and OPA551FAKTWTG3 share identical DDPAK-7 (KTW) package dimensions, pin numbering, and pin functions (V+, V−, OUT, +IN, −IN, FLAG, Tab). They are direct physical replacements; however, functional compatibility requires verifying gain configuration: OPA552FAKTWTG3 requires G ≥ 5, while OPA551FAKTWTG3 supports G = 1.