Datasheet LF398N/NOPB - National Semiconductor IC, SAMPLE & HOLD AMP, 1 MHz, 20 uS, DIP-8 — Datenblatt

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Manufacturer: National Semiconductor

Description: IC, SAMPLE & HOLD AMP, 1 MHz, 20 uS, DIP-8

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Docket:
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

Specifications:

• Acquisition Time: 20 µs
• Bandwidth: 1 MHz
• Input Offset Voltage: 2 mV
• Number of Amplifiers: 1
• Number of Pins: 8
• Package / Case: DIP
• Supply Voltage Range: ± 5 V to ± 18 V
• RoHS: Yes