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Texas Instruments OPAx994 High Voltage RRIO Operational Amplifiers offer excellent AC performance, including a wide unity gain bandwidth of 24MHz and a high slew rate of 35V/µs, while only requiring a quiescent current of 1.35mA per channel. The OPAx994 family was designed to maintain stability across various capacitive loads. For example, OPAx994 can achieve a phase margin of 50 degrees when driving large capacitive loads of 10µF with a load resistance of 1MΩ. The OPAx994 is designed with compensation architectures that mitigate sustained ringing for large capacitive loads. This design allows for reliable performance and ease of design for systems with large, varying, or unknown capacitive loads.
These devices also offer excellent DC precision, including a high short-circuit output current of 125mA/channel, low offset voltage (±350µV, typical), low offset drift (±2.5µV/°C, typical), and high CMRR of 125dB for high voltage operation within the main input pair. These features make the Texas Instruments OPAx994 a flexible, robust, high-performance op amp for high-voltage industrial applications.
