Texas Instruments OPA452TA

Overview

OPA452TA from Texas Instruments is a high-voltage, high-current operational amplifier in a 7-lead TO-220 (TA) package, delivering ±50mA continuous output current with ±10V to ±40V supply range and 1.8MHz gain-bandwidth product. It features thermal shutdown, output current limiting, rail-to-rail output swing within 4V of rails at full load, and operates from –40°C to +125°C junction temperature - used in piezoelectric drivers, servo amplifiers, and high-voltage test equipment.

For engineers reviewing the OPA452TA datasheet, OPA452TA pinout, OPA452TA application, or OPA452TA equivalent, this page delivers verified electrical specs, validated TO-220-7 pin mapping, real-world use cases in transducer and audio power stages, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The OPA452TA implements unity-gain-stable architecture with internal protection circuitry including thermal shutdown (triggering at +160°C, reset at +145°C) and output current limiting (~±125mA short-circuit). Its input stage uses JFET-based topology enabling ultra-low input bias current (±7pA typ), while the output stage supports wide voltage swing (V– +4V to V+ –4V at ±50mA) and capacitive load drive up to 10nF with external compensation.

Unlike standard op amps, the OPA452TA maintains specified performance across its full ±10V to ±40V supply range - including offset voltage (±3mV max), CMRR (86dB min), and PSRR (30µV/V typ) - with laser-trimmed precision and no phase inversion under common-mode overdrive.

Key Specifications

Pinout & Package

OPA452TA uses a 7-lead TO-220 (TA) package with electrically connected tab tied to V–. The tab must be soldered to PCB copper for thermal management but not used as current path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA452TA, OPA453TA trades unity-gain stability for higher speed and slew rate, while OPA452FA retains identical performance in a surface-mount form factor - both require redesign of thermal management or gain configuration, making them alternatives rather than drop-in replacements.

Availability

OPA452TA is available at Aetrix Electronics and suitable for piezoelectric actuation, industrial servo control, and high-voltage test instrumentation requiring stable component supply across extended temperature and voltage ranges.

Supply support for OPA452TA 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 heritage in precision op amp design and high-reliability manufacturing.

The OPA452TA belongs to TI's high-voltage power op amp family, engineered specifically for demanding applications requiring robust output drive, wide supply tolerance, and integrated protection - targeting industrial automation, test & measurement, and precision motion control.

FAQ

What is the maximum continuous output current of the OPA452TA?

The OPA452TA delivers ±50mA continuous output current into resistive loads, with short-circuit current limited to ±125mA. This rating holds across the full ±10V to ±40V supply range and –40°C to +125°C junction temperature. Derating is required above +125°C ambient due to thermal limits - always verify junction temperature using θJC = 3°C/W and actual power dissipation in your layout. The OPA452TA sustains this current without external boost circuitry in applications like transducer drivers and servo amplifiers.

Does the OPA452TA require external compensation for unity-gain stability?

No - the OPA452TA is explicitly unity-gain stable per TI's SBOS127C datasheet, with guaranteed phase margin in G = 1 configurations. Unlike the OPA453TA, it does not require external compensation networks for stability at minimum gain. However, driving capacitive loads >100pF may still require series isolation resistor or RC snubber per Figure 5 in the Applications Information section. The OPA452TA's internal compensation ensures predictable behavior in buffer, follower, and gain-of-one instrumentation circuits without added components.

How is the Flag pin on the OPA452TA used for thermal monitoring?

Pin 7 (Flag) on the OPA452TA is an open-drain current source that outputs ~50nA during normal operation and increases to 100–165µA (typ 140µA) when thermal shutdown activates at +160°C junction temperature. It interfaces directly with CMOS or HCT logic using a pull-up resistor - e.g., 19.1kΩ to +5V yields >4.0V logic-high during shutdown. This enables real-time fault detection in systems like automated test equipment or motor drives without adding discrete sensors. The OPA452TA's Flag pin provides deterministic, repeatable thermal status independent of external circuitry.

Can the OPA452TA operate from an asymmetric power supply?

Yes - the OPA452TA supports fully asymmetric supplies, such as +70V / –10V (80V total), with no degradation in key specs like offset voltage, CMRR, or output swing. Its input common-mode range extends to (V–)+5V and (V+)–0.5V, and output swing remains (V–)+4V to (V+)–4V at full load. This flexibility allows optimized rail selection in applications like audio line drivers or piezo biasing where negative swing is minimal. The OPA452TA maintains full specification compliance across all combinations within the ±10V to ±40V per-rail absolute maximum ratings.

What is the thermal resistance (θJC) of the OPA452TA package?

The OPA452TA in its TO-220 (TA) package has a junction-to-case thermal resistance (θJC) of 3°C/W, measured from die to the metal tab. This value is identical to the DDPAK variant (OPA452FA), confirming consistent thermal path design across packages. To maintain junction temperature ≤+125°C, total power dissipation must be limited based on ambient temperature and heatsink efficiency - e.g., at +40°C ambient and θJA = 30°C/W, max PD = (125–40)/30 ≈ 2.83W. The OPA452TA's low θJC enables effective heat transfer when the tab is soldered to ≥1in² of 1oz copper, as validated in TI's Figure 4 thermal data.