SMP11S

The SMP11 is a precision sample-and-hold amplifier that provides the high accuracy, the low droop rate and the fast acquisition time required in data acquisition and signal processing systems. The devices is essentially a non-inverting unity gain circuit consisting of two very high input impedance buffer amplifiers connected together by a diode bridge switch.

High Accuracy and Low Droop Rate

The high input impedance and the low droop rates of the SMP11 are achieved by using bipolar Darlington circuits and an ion implant process that creates “super beta” transistors

The output buffer's input stage converts to a super beta Darlington configuration during the hold mode, which results in a very low droop rate with no penalty in acquisition time. The use of bipolar transistors achieves a low change in droop rate over the operating temperature range.

Fast Acquistion

A unique super charger provides up to 50mA of charging current to the hold capacitor, which results in smooth, fast charging with minimum noise. As the hold capacitor voltage nears its final value, the low current diode bridge controls the final settling time. This unique combination of linear functions in a monolithic circuit enables the system designer to achieve superior performance.