Datasheet LF298M - National Semiconductor AMP SAMPLE AND HOLD, SOIC14, 298

National Semiconductor LF298M

Part Number: LF298M

Detailed Description

Manufacturer: National Semiconductor

Description: AMP SAMPLE AND HOLD, SOIC14, 298

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LF198/LF298/LF398, LF198A/LF398A Monolithic Sample-and-Hold Circuits
July 2000
LF198/LF298/LF398, LF198A/LF398A Monolithic Sample-and-Hold Circuits
General Description
The LF198/LF298/LF398 are monolithic sample-and-hold circuits which utilize BI-FET 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 6 µs 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 1 MHz op amps without having stability problems. Input impedance of 1010 allows high source impedances to be used without degrading accuracy. P-channel junction FET's are combined with bipolar devices in the output amplifier to give droop rates as low as 5 mV/min with a 1 µF


  • Acquisition Time: 4 µs
  • Amplifier Type: Sample and Hold
  • Base Number: 298
  • IC Generic Number: 298
  • Input Offset Voltage Max: 5 mV
  • Input Offset Voltage: 3 mV
  • Mounting Type: SMD
  • Number of Amplifiers: 1
  • Number of Pins: 14
  • Operating Temperature Range: -25°C to +85°C
  • Package / Case: SOIC
  • SVHC: No SVHC (15-Dec-2010)
  • Supply Voltage + Nom: 18 V
  • Supply Voltage - Nom: -18 V
  • Supply Voltage Range: ± 5 V to ± 18 V

RoHS: Yes


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