Texas Instruments OPA452FA/500

Overview

OPA452FA/500 from Texas Instruments is a unity-gain stable, high-voltage (±10V to ±40V), high-output-current (±50mA) operational amplifier in a 7-lead DDPAK surface-mount package. It delivers 1.8MHz gain-bandwidth, ±7.2/–10V/µs slew rate, and rail-to-rail output swing within 4V of supply rails at full load-enabling precision piezoelectric actuation and transducer driver applications requiring wide dynamic range and thermal robustness.

For engineers reviewing the OPA452FA/500 datasheet, OPA452FA/500 pinout, OPA452FA/500 application, or OPA452FA/500 equivalent, key selection criteria include guaranteed operation across ±10V–±40V supplies, thermal shutdown flag output, 125°C junction-rated performance, and verified SOA compliance for continuous 50mA drive into reactive loads.

Technical Context

The OPA452FA/500 implements a fully protected monolithic bipolar input stage with internal current limiting (±125mA short-circuit), thermal shutdown activation at +160°C, and a dedicated Flag pin that sinks 140µA during overtemperature events. Its unity-gain stability eliminates external compensation for low-gain configurations.

Unlike many power op amps, all electrical specifications-including input offset voltage (±3mV max), CMRR (86dB min), and open-loop gain (105dB min)-are ensured across the full ±10V to ±40V supply range and –40°C to +125°C junction temperature range, enabling reliable deployment in unregulated industrial power systems.

Key Specifications

Pinout & Package

OPA452FA/500 uses a 7-lead DDPAK (TO-263, package drawing KTW) surface-mount package. The metal tab is electrically connected to V– and must be soldered to a large PCB copper area for thermal management; it is not rated for current conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA452FA/500, OPA453FA/500 trades unity-gain stability for higher speed, while OPA547TP sacrifices thermal visibility for tenfold current capacity-making OPA452FA/500 the optimal choice for thermally constrained, unity-gain, high-accuracy transducer interfaces.

Availability

OPA452FA/500 is available at Aetrix Electronics and suitable for piezoelectric actuator drivers, high-voltage test equipment, and servo motor interface circuits requiring stable component supply across extended temperature and voltage ranges.

Supply support for OPA452FA/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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and high-reliability power management ICs.

The OPA452FA/500 belongs to TI's high-voltage power op amp product line, engineered specifically for industrial transducer drivers, test instrumentation, and precision motion control systems demanding wide supply range, thermal resilience, and guaranteed parametric performance.

FAQ

What is the maximum continuous output current specification for the OPA452FA/500?

The OPA452FA/500 is rated for ±50mA continuous output current under specified thermal conditions. This value is guaranteed across the full –40°C to +125°C junction temperature range and ±10V to ±40V supply voltages. Short-circuit current reaches ±125mA, but sustained operation at that level triggers thermal shutdown. For reliable 50mA operation, the DDPAK-7 package must be mounted on ≥2 in² of 1oz copper with θ_JA ≤ 30°C/W.

Does the OPA452FA/500 require external compensation for unity-gain stability?

No, the OPA452FA/500 is internally compensated for unity-gain stability and does not require external components to maintain phase margin in G = +1 configurations. This is confirmed in the datasheet's "DESCRIPTION" section and verified by the open-loop gain/phase plots showing >45° phase margin at unity gain. External compensation is only needed if driving highly capacitive loads (>1nF) without isolation resistors.

How is the Flag pin on the OPA452FA/500 used in thermal monitoring?

The Flag pin on the OPA452FA/500 sinks 140µA (typical) during thermal shutdown-activated when junction temperature exceeds +160°C-and 0.1µA during normal operation. It is designed for direct interfacing with CMOS or HCT logic using a pull-up resistor (e.g., 39kΩ to +5V). This provides a simple, current-mode fault signal without requiring additional sensing circuitry or ADC resources.

Can the OPA452FA/500 operate with asymmetric power supplies?

Yes, the OPA452FA/500 supports asymmetric supplies-for example, +70V and –10V-as long as the total differential voltage remains ≤80V and each supply stays within ±10V to ±40V absolute limits. The device's input common-mode range extends to (V–) + 5V and (V+) – 0.5V, allowing valid operation even with highly unbalanced rails, provided output swing constraints are observed.

What is the safe operating area (SOA) limitation for the OPA452FA/500 at ±40V supplies?

At ±40V supplies, the OPA452FA/500's SOA restricts simultaneous high voltage and high current: for example, 50mA output is only permitted when |V_S – V_O| ≤ 20V. The SOA curve (Figure 3 in SBOS127C) shows that at |V_S – V_O| = 40V (e.g., short-circuit), safe continuous current drops to ~10mA. Exceeding SOA risks thermal runaway-even with heatsinking-so designs must verify worst-case V_O and I_O combinations.