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LF398N/NOPB .

Sample and Hold Amplifier, 1 Amplifier, 1 MHz, 20 µs, 2 mV, DIP, 8 Pins

TEXAS INSTRUMENTS LF398N/NOPB .

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Manufacturer Part No:
LF398N/NOPB .
Order Code:
2496205

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TEXAS INSTRUMENTS

Sample and Hold Amplifier, 1 Amplifier, 1 MHz, 20 µs, 2 mV, DIP, 8 Pins

     
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Product Overview

The LF398N/NOPB is a monolithic Sample-and-Hold Circuit uses BI-FET technology to obtain ultrahigh DC accuracy with fast acquisition of signal and low droop rate. Operating as 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-N to be included inside the feedback loop of 1MHz operational amplifiers without having stability problems. Input impedance of 10¹⁰R allows high-source impedances to be used without degrading accuracy. P-channel junction FETs are combined with bipolar devices in the output amplifier to give droop rates as low as 5mV/minute with a 1µF hold capacitor. The JFETs have much lower noise than MOS devices used in previous designs and do not exhibit high temperature instabilities.
  • Low input offset
  • Low output noise in hold mode
  • Input characteristics do not change during hold mode
  • High supply rejection ratio in sample or hold
  • Wide bandwidth
  • Logic input compatible with TTL, PMOS and CMOS
  • 0.5mV Typical hold step at 0.01µF
  • 0.002% Gain accuracy
  • 500mW Power dissipation
  • ±15V Supply voltage

Applications

Industrial

Warnings

Device has limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

Product Information

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:
1 Amplifier

:
1MHz

:
20µs

:
2mV

:
DIP

:
8Pins

:
± 5V to ± 18V

:
-

:
0°C

:
70°C

:
-

:
MSL 1 - Unlimited
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CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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