OPA857

The OPA857 is a high-speed, low-noise operational amplifier manufactured by Texas Instruments, designed for precision signal conditioning in demanding applications. It features a gain-bandwidth product of 2.3 GHz, enabling it to handle fast transient signals with exceptional fidelity. The device operates from a single 5 V supply and draws only 14 mA of quiescent current, making it ideal for power-sensitive systems requiring high performance. Key characteristics include a wide input common-mode range that extends to the negative supply rail, allowing compatibility with both single-supply and split-supply configurations. Its low noise density of 1.9 nV/√Hz at 10 kHz ensures clean signal amplification even in sensitive analog circuits. Additionally, the OPA857 offers a high slew rate of 2500 V/μs, which supports rapid response times essential for high-frequency signal processing tasks such as video amplification and optical communication systems. This amplifier is optimized for use in applications involving photodiode transimpedance amplifiers, where its low input bias current (1 pA typical) minimizes errors in high-impedance sensor interfaces. It also excels in RF and microwave front-end stages due to its excellent stability over temperature and wide bandwidth, maintaining consistent performance across industrial and automotive operating conditions. The OPA857 is available in a compact SOIC package, facilitating integration into space-constrained designs. Its robust design includes internal ESD protection and thermal shutdown features, enhancing reliability in harsh environments. The device is suitable for use in test and measurement equipment, medical imaging systems, and high-speed data acquisition systems where signal integrity and speed are critical. Engineered for ease of use, the OPA857 requires minimal external components for stable operation, reducing design complexity and board area. It supports both inverting and non-inverting configurations, offering flexibility in circuit topology selection. With its combination of speed, low noise, and high precision, the OPA857 serves as a reliable building block for modern analog signal chains requiring superior performance in compact form factors.