AD585S: Aerospace High Speed, Precision Sample-and-Hold Amplifier

The AD585 is a complete monolithic sample-and-hold circuit consisting of a high performance operational amplifier in series with an ultralow leakage analog switch and a FET input integrating amplifier. An internal holding capacitor and matched applications resistors have been provided for high precision and applications flexibility.

The performance of the AD585 makes it ideal for high speed 10- and 12-bit data acquisition systems, where fast acquisition time, low sample-to-hold offset, and low droop are critical. The AD585 can acquire a signal to ±0.01% in 3 us maximum, and then hold that signal with a maximum sample-to-hold offset of 3 mV and less than 1 mV/ms droop, using the on-chip hold capacitor. If lower droop is required, it is possible to add a larger external hold capacitor.

The high speed analog switch used in the AD585 exhibits aperture jitter of 0.5 ns, enabling the device to sample full scale (20 V peak-to-peak) signals at frequencies up to 78 kHz with 12-bit precision.

The AD585 can be used with any user-defined feedback network to provide any desired gain in the sample mode. On-chip precision thin-film resistors can be used to provide gains of +1, -1, or +2. Output impedance in the hold mode is sufficiently low to maintain an accurate output signal even when driving the dynamic load presented by a successive-approximation A/D converter. However, the output is protected against damage from accidental short circuits.

The control signal for the HOLD command can be either active high or active low. The differential HOLD signal is compatible with all logic families, if a suitable reference level is provided. An on-chip TTL reference level is provided for TTL compatibility.

AD585S 特点

3.0us Acquistion Time to ±0.01% Max
Low Droop Rate : 1.0mV/ms Max
Sample/Hold Offset Step: 3mV Max
Aperture Jitter: 0.5ns typical
Internal Hold Capacitor
Internal Application Resistors
±12V or ±15 Operation

AD585S 功能框图

AD585S 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD585-703M	量产	14 ld Flat Pack	14	军用
AD585-713M	量产	14 ld Flat Pack	14	军用
AD585-713Q	量产	CERDIP GLASS SEAL	14	军用
AD5850703Q	量产	14 ld Bottom-Brazed CerDIP	14	军用