lf147j-883 National Semiconductor Corporation, lf147j-883 Datasheet - Page 8

• Manufacturer Part Number: lf147j-883
• Description: Wide Bandwidth Quad Jfet Input Operational Amplifiers
• Manufacturer: National Semiconductor Corporation

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Pulse Response
Application Hints
The LF147 is an op amp with an internally trimmed input
offset voltage and JFET input devices (BI-FET II). These
JFETs have large reverse breakdown voltages from gate to
source and drain eliminating the need for clamps across the
inputs. Therefore, large differential input voltages can easily
be accommodated without a large increase in input current.
The maximum differential input voltage is independent of the
supply voltages. However, neither of the input voltages
Small Signal Non-Inverting
Small Signal Inverting
R
L
=2 kΩ, C
L
=10 pF
00564705
00564704
Current Limit (R
8
should be allowed to exceed the negative supply as this will
cause large currents to flow which can result in a destroyed
unit.
Exceeding the negative common-mode limit on either input
will force the output to a high state, potentially causing a
reversal of phase to the output. Exceeding the negative
common-mode limit on both inputs will force the amplifier
output to a high state. In neither case does a latch occur
since raising the input back within the common-mode range
again puts the input stage and thus the amplifier in a normal
operating mode.
L
=100Ω)
00564708
Large Signal Non-Inverting
Large Signal Inverting
00564706
00564707