OPA2188

The OPA2188 is a precision dual operational amplifier manufactured by Texas Instruments, designed for high-performance analog signal conditioning applications. It features a low noise density of 1.1 nV/√Hz at 1 kHz, making it ideal for sensitive measurement and low-level signal amplification tasks. The device offers a wide gain bandwidth product of 30 MHz, enabling accurate amplification across a broad frequency range while maintaining stability in both inverting and non-inverting configurations. This op amp provides exceptional DC accuracy with a maximum input offset voltage of 50 µV and a drift as low as 0.4 µV/°C, ensuring reliable performance over temperature variations. Its low input bias current—just 1 pA—minimizes loading effects on high-impedance sources, which is particularly beneficial in sensor interface circuits such as those used in medical devices or industrial instrumentation. The OPA2188 operates from a single supply voltage ranging from ±2.25 V to ±18 V (or 4.5 V to 36 V in single-supply mode), offering flexibility in power domain design. It includes built-in protection features such as ESD immunity up to ±2 kV and short-circuit protection, enhancing system robustness in harsh environments. The device also supports rail-to-rail output swing, maximizing dynamic range without sacrificing linearity near the supply rails. Designed for high reliability and long-term stability, the OPA2188 exhibits excellent thermal performance with a typical quiescent current of 1.7 mA per amplifier, making it suitable for battery-powered systems where power efficiency is critical. It is available in multiple packages including SOIC and TSSOP, supporting compact PCB designs for space-constrained applications. Common applications include precision data acquisition systems, active filter designs, transducer signal conditioning, and industrial process control loops. Its versatility makes it well-suited for use in medical equipment like ECG and EEG amplifiers, as well as in test and measurement instruments requiring high resolution and minimal distortion. The OPA2188’s combination of low noise, high precision, and wide supply compatibility positions it as a preferred choice for engineers seeking dependable analog performance in demanding environments.