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LF198FE - Sample-and-hold amplifiers

General Description

The LF198/LF298/LF398 are monolithic sample-and-hold circuits which utilize high-voltage ion-implant JFET technology to obtain ultra-high DC accuracy with fast acquisition of signal and low droop rate.

Key Features

  • Operates from ±5V to ±18V supplies.
  • Less than 10µs acquisition time.
  • TTL, PMOS, CMOS compatible logic input.
  • 0.5mV typical hold step at CH=0.01µF.
  • Low input offset.
  • 0.002% gain accuracy.
  • Low output noise in hold mode.
  • Input characteristics do not change during hold mode.
  • High supply rejection ratio in sample or hold.
  • Wide bandwidth.

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Part Number Description
LF198 Sample-and-hold amplifiers

Full PDF Text Transcription (Reference)

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Philips Semiconductors Linear Products Product specification Sample-and-hold amplifiers LF198/LF298/LF398 DESCRIPTION The LF198/LF298/LF398 are monolithic sample-and-hold circuits which utilize high-voltage ion-implant JFET technology to obtain ultra-high DC accuracy with fast acquisition of signal and low droop rate. Operating as a unity gain follower, DC gain accuracy is 0.002% typical and acquisition time is as low as 6µs to 0.01%. A bipolar input stage is used to achieve low offset voltage and wide bandwidth. Input offset adjust is accomplished with a single pin and does not degrade input offset drift. The wide bandwidth allows the LF198 to be included inside the feedback loop of 1MHz op amps without having stability problems.