Low

TEXAS INSTRUMENTS  LF398N/NOPB  Sample and Hold Amplifier, 1 Amplifier, 1 MHz, 20 µs, 2 mV, DIP, 8 Pins

TEXAS INSTRUMENTS LF398N/NOPB
Technical Data Sheet (10.09KB) EN See all Technical Docs

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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
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

No. of Amplifiers:
1 Amplifier
Bandwidth:
1MHz
Acquisition Time:
20µs
Input Offset Voltage:
2mV
Amplifier Case Style:
DIP
No. of Pins:
8Pins
Supply Voltage Range:
± 5V to ± 18V
Settling Time:
-
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Product Range:
-
Packaging:
Each
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (15-Jun-2015)

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Applications

  • Industrial

Legislation and Environmental

Moisture Sensitivity Level:
MSL 1 - Unlimited
Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423300
Weight (kg):
.000454

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