A low drift sample and hold is used to accurately measure and hold a voltage signal for a certain period of time. It is often used in electronic circuits and data acquisition systems to maintain the stability of the measured signal.
A low drift sample and hold uses a capacitor to store and hold the input voltage signal. When a control signal is received, the capacitor is disconnected from the input and connected to the output, holding the voltage at a constant level until the next control signal is received.
The main difference between a low drift sample and hold and a regular one is the level of accuracy and stability. A low drift sample and hold has a lower drift rate, meaning it can maintain the held voltage more accurately over time compared to a regular sample and hold.
There are several factors that can cause drift in a sample and hold circuit, such as changes in temperature, power supply variations, and component aging. These can affect the accuracy and stability of the held voltage signal over time.
When selecting a low drift sample and hold, it is important to consider the required accuracy and stability of the held voltage, as well as the operating conditions and specifications of the circuit. It is also important to choose a reputable manufacturer and carefully read the datasheet for the chosen sample and hold device.