LF412
January 28, 2010
Low Offset, Low Drift Dual JFET Input Operational
Amplifier
General Description
These devices are low cost, high speed, JFET input opera-
tional amplifiers with very low input offset voltage and guar-
anteed input offset voltage drift. They require low supply
current yet maintain a large gain bandwidth product and fast
slew rate. In addition, well matched high voltage JFET input
devices provide very low input bias and offset currents. The
LF412 dual is pin compatible with the LM1558, allowing de-
signers to immediately upgrade the overall performance of
existing designs.
These amplifiers may be used in applications such as high
speed integrators, fast D/A converters, sample and hold cir-
cuits and many other circuits requiring low input offset voltage
and drift, low input bias current, high input impedance, high
slew rate and wide bandwidth.
Features
■
Internally trimmed offset voltage: 1 mV (max)
■
Input offset voltage drift: 10 μV/°C (max)
■
Low input bias current: 50 pA
■
Low input noise current:
■
Wide gain bandwidth: 3 MHz (min)
■
High slew rate: 10V/μs (min)
■
Low supply current: 1.8 mA/Amplifier
■
High input impedance: 10
12
Ω
■
Low total harmonic distortion ≤0.02%
■
Low 1/f noise corner: 50 Hz
■
Fast settling time to 0.01%: 2 μs
Typical Connection
565641
Ordering Information
LF412XYZ
X
indicates electrical grade
Y
indicates temperature range
“M” for military
“C” for commercial
Z
indicates package type
“H” or “N”
Connection Diagrams
Metal Can Package
565642
Order Number LF412MH, LF412CH
See NS Package Number H08A
or LF412MH/883 (Note 1)
See NS Package Number H08C
Dual-In-Line Package
565644
Order Number LF412ACN, LF412CN
or LF412MJ/883 (Note 1)
See NS Package Number J08A or N08E
BI-FET II™ is a trademark of National Semiconductor Corporation.
© 2010 National Semiconductor Corporation 5656 www.national.com
LF412 Low Offset, Low Drift Dual JFET Input Operational Amplifier
