Texas Instruments OPA454AIDDAG4

Overview

OPA454AIDDAG4 from Texas Instruments is a high-voltage (±50 V), high-current (±50 mA) unity-gain-stable operational amplifier in an 8-pin SO PowerPAD™ package. It delivers rail-to-rail output swing within 1 V, features independent output disable via open-drain status flag and dedicated enable/disable pins, and operates across –40°C to +85°C for avalanche photodiode current sensing and piezoelectric transducer driving.

For engineers reviewing the OPA454AIDDAG4 datasheet, OPA454AIDDAG4 pinout, OPA454AIDDAG4 application, or OPA454AIDDAG4 equivalent, key selection criteria include its 2.5-MHz gain-bandwidth product, ±120/–150-mA peak current limit, 13-V/µs slew rate, thermal shutdown protection at 150°C junction temperature, and compatibility with single-supply (10–100 V) or dual-supply (±5–±50 V) configurations.

Technical Context

The OPA454AIDDAG4 integrates internal overtemperature and overcurrent protection with a status flag that asserts low on either fault condition. Its enable/disable architecture uses separate E/D and E/D Com pins referenced to V–, allowing clean output shutdown without disturbing input bias paths or requiring external level-shifting circuitry.

This op amp employs a robust output stage capable of sourcing/sinking ≥±50 mA continuously while maintaining >100-dB open-loop gain at 10-mA load and >80-dB gain at 26-mA load. Its input stage features ultra-low input bias current (±1.4 pA typical) and high common-mode rejection (100–147 dB), enabling precision high-voltage signal conditioning in noisy industrial environments.

Key Specifications

Pinout & Package

OPA454AIDDAG4 is housed in an 8-pin SO PowerPAD™ (DDA) package measuring 4.89 mm × 3.90 mm with an exposed metal thermal pad on the bottom side, internally connected to V– and requiring soldering to PCB for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA454AIDDAG4, the OPA445 offers lower voltage/current capability but identical pinout for legacy upgrades, while the OPA452 omits critical system-monitoring features-making OPA454AIDDAG4 the only choice for thermally protected, remotely controllable high-voltage amplification.

Availability

OPA454AIDDAG4 is available at Aetrix Electronics and suitable for test equipment, avalanche photodiode current sensing, piezoelectric transducer driving, servo motor control, and high-voltage compliance current sources requiring stable component supply across extended temperature and voltage ranges.

Supply support for OPA454AIDDAG4 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 high-reliability, high-performance analog ICs for industrial, automotive, and test & measurement markets.

The OPA454AIDDAG4 belongs to TI's high-voltage operational amplifier product line, designed specifically for precision, high-power analog signal conditioning in demanding industrial and scientific instrumentation where rail-swing, thermal safety, and fault visibility are critical.

FAQ

What is the maximum continuous output current specification for the OPA454AIDDAG4?

The OPA454AIDDAG4 supports ≥±50 mA continuous output current under recommended operating conditions. Its current-limit threshold is +120/–150 mA peak (typical) at 25°C, rising to +140/–170 mA over –40°C to +85°C. Continuous drive capability depends on thermal management-junction temperature must remain below 150°C, enforced by internal thermal shutdown. The SO PowerPAD™ package requires proper PCB copper area for heatsinking to sustain rated current.

Does the OPA454AIDDAG4 require external components to implement output disable functionality?

No, the OPA454AIDDAG4 implements independent output disable natively using its dedicated E/D and E/D Com pins. Applying a logic-low voltage (≤E/D Com + 0.65 V) to Pin 8 disables the output in ≤4 µs without affecting input bias or requiring external FETs or switches. The E/D Com pin (Pin 1) serves as the reference, and both pins are compatible with standard 3.3-V or 5-V logic levels when referenced to V–, eliminating need for level shifters or passive components.

How does the Status Flag pin on the OPA454AIDDAG4 behave during overtemperature events?

The Status Flag pin (Pin 5) on the OPA454AIDDAG4 is an open-drain, active-low output referenced to E/D Com. During overtemperature events, it asserts low when junction temperature reaches 150°C and returns high after cooling to 130°C. The delay from overtemperature onset to flag assertion is ≤15 µs. This pin can directly interface to microcontroller GPIOs or logic supervisors without pull-up resistors beyond those needed for the target logic family, enabling real-time fault monitoring in safety-critical systems.

Can the OPA454AIDDAG4 operate from a single 100-V supply, and what are the input voltage limitations?

Yes, the OPA454AIDDAG4 supports single-supply operation from 10 V to 100 V (V+ = 100 V, V– = GND). Its common-mode input voltage range is specified from (V–) + 2.5 V to (V+) – 2.5 V, meaning at 100-V supply it accepts inputs from +2.5 V to +97.5 V. Input terminals are diode-clamped to rails; signals exceeding (V–) – 0.3 V or (V+) + 0.3 V must be current-limited to ≤10 mA. For rail-referenced inputs, external clamping or attenuation is required.

What thermal resistance values apply to the OPA454AIDDAG4 in its SO PowerPAD™ package?

The OPA454AIDDAG4 in the SO PowerPAD™ (DDA) package has RθJA = 40.6°C/W (junction-to-ambient), RθJC(bot) = 2.5°C/W (junction-to-case bottom), and RθJB = 20.7°C/W (junction-to-board). These values assume proper soldering of the exposed thermal pad to a minimum 1-in² copper area on the PCB. With adequate heatsinking, the device sustains full ±50-mA output at ambient temperatures up to +85°C. Derating curves in the datasheet show maximum power dissipation versus ambient temperature for various PCB copper areas.