Dual, 32V, 24MHz RRIO high-output-current (125mA) op amp with unlimited capacitance load drive

The OPAx994 family (OPA994 and

OPA2994) is a family of high voltage (32V) rail-to-rail input and output (RRIO)

operational amplifiers. These devices 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 a wide range of capacitive loads. For example, OPAx994 is

able to 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

allows for reliable performance and ease of design for systems that have 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. This makes the

OPAx994 a flexible, robust, and high-performance op amp for high-voltage industrial

applications.