SHA1144 Datasheet | Analog

ANALOG DEVICES Features t10V min lnput/Output Range 50ns Aperture Delay 0.5ns Aperture Jitter 6ps Settling Time t0.001% Max Gain Linearity Error with Input Buffer plete APPLICATIONS Trackand Hold Peak Measurement Systems Data Acquisition Systems Simultaneous Sample-and-Hold High Resolution l+Bit and Sample Hold Amplifier GENERAL DESCRIPTION The SHA1144 is a fast sample-holdamplifier module with ac curacy and dynamic performance appropriatefor applications "sample" with fast 14-bit A/D converters.In the mode, it acrs as a fast amplifier, tracking the input signal. When switched to "hold" mode, the output is held at a level corresponding the to the input signal voltage at t}le instant of switching. The "hold" droop rate in is appropriate to allow accurate conversion by 14-bit A/D converters having conversion times of up to 150trrs. DYNAMIC PERFORMANCE to be patible The SHA1144wasdesigned with fast 14-bit A/D converters suchasthe Analog Devices'ADC1130 and which convert14 bits in 25gsand 129s,re ADC1131series, Maximum acquisitiontime of 8trrs for the SHA1144 spectively. permits high samplingrates for 14-bit conversions. The SHA1144is guaranteed to havea maximumgainnonlinearity of 10.0017o of full scale to insure1/2LSBaccuracy in 14-bit systems. Whenin the "hold" mode,the droop rate is Lp Vltrrs, so the SHA1144will hold an input signal to 10.003%of full (20V p-p) for over60oprs. scale PRINCIPLE OF OPERATION basically of two high speed operational The SHA1144consists amplifiers,a storagecapacitor,and a digitally controlled modulesin one switch. It differs from typical sample-and-hold important respectiapplicationversatility.The user pletes circuit externalto the module.Therethe SHA1144feedback fore, the module may be usedin invertingor noninvertingconfigurationsand can easilybe arranged to providecircuit gain of more than uniry to simplifysignal conditioning in a subsystem. FEEDBACK CONNECTIONS A block diagramof the SHA1144 is shownin Figure 1. The input...