The LTC2389IUK-18PBF is an 18-bit successive approximation analog-to-digital converter (ADC) from Analog Devices. It has a selectable input range of 0V to 5V, and a wide programmable data rate of 4.9µs to 2.5ms. The part features high precision, low distortion, low noise, high linearity, and low power consumption, and is suitable for applications such as industrial process control, measurement instrumentation, and programmable gain amplifier. Its Ultra-Low-Noise™ design conserves dynamic range even during sampling, enabling the best performance in extreme low-noise conditions. The part is also optimized for automation test equipment (ATE) applications, and comes in a small space-saving 8-lead MSOP-18 package.