Instrumentation amplifiers, Operational amplifiers (OP Amps), and Buffer amplifiers are used in electronic circuits for signal processing and conditioning. Instrumentation amplifiers are specialized for precise measurement of small signals, commonly used in sensor interfaces and instrumentation systems. OP Amps are versatile ICs used in a wide range of applications such as active filters, amplification, and feedback control circuits. Buffer amplifiers, also known as unity gain amplifiers, are used to isolate and strengthen signals without altering their characteristics, improving signal integrity and driving capabilities in complex electronic circuits. Basic ICs with standard performance characteristics are generally more affordable. High-performance amplifiers with advanced features like low noise, high bandwidth, precision accuracy, and wide supply voltage range may command higher prices. When purchasing these ICs, define the required specifications such as gain, bandwidth, input/output impedance, and power supply requirements based on your application's signal processing and conditioning needs. Select amplifiers with suitable characteristics for signal accuracy, noise performance, and dynamic range to ensure reliable and precise signal processing.