Multifunctional high-precision sample and hold circuit diagram

This article introduces a multi-functional and high-precision sample and hold circuit diagram. This circuit uses the OPA615 high-bandwidth, DC recovery circuit, up to 320MHz bandwidth, +/-5V power supply voltage, +/-3.5V comparator output voltage swing, Approximately 14mA maximum Iq. For a 100pF hold capacitor, the step-down rate is as low as 0.17mV/s, with only 40fC charge injection, and 100dB sample-and-hold feedthrough suppression is achieved. This reference design provides high-bandwidth, high-precision sample-and-hold circuitry for a variety of applications. The circuit is supported by a comprehensive set of design guidelines and can be easily adapted for a given application.