TL/H/5648
L
December 1995
LF351 Wide Bandwidth JFET Input Operational Amplifier
General Description
The LF351 is a low cost high speed JFET input operational
amplifier with an internally trimmed input offset voltage
(BI-FET II
TM
technology). The device requires a low supply
current and yet maintains a large gain bandwidth product
and a fast slew rate. In addition, well matched high voltage
JFET input devices provide very low input bias and offset
currents. The LF351 is pin compatible with the standard
LM741 and uses the same offset voltage adjustment circuit-
ry. This feature allows designers to immediately upgrade the
overall performance of existing LM741 designs.
The LF351 may be used in applications such as high speed
integrators, fast D/A converters, sample-and-hold circuits
and many other circuits requiring low input offset voltage,
low input bias current, high input impedance, high slew rate
and wide bandwidth. The device has low noise and offset
voltage drift, but for applications where these requirements
are critical, the LF356 is recommended. If maximum supply
current is important, however, the LF351 is the better
choice.
Features
Y
Internally trimmed offset voltage
10 mV
50 pA
Y
Low input bias current
Y
Low input noise voltage
25 nV/
Hz
Y
Low input noise current
0.01 pA/
Hz
4 MHz
13 V/
m
s
1.8 mA
10
12
X
k
0.02%
Y
Wide gain bandwidth
Y
High slew rate
Y
Low supply current
Y
High input impedance
Y
Low total harmonic distortion A
V
e
10,
R
L
e
10k, V
O
e
20 Vp-p, BW
e
20 Hz–20 kHz
Y
Low 1/f noise corner
50 Hz
2
m
s
Y
Fast settling time to 0.01%
Typical Connection
TL/H/5648–11
Simplified Schematic
TL/H/5648–12
Connection Diagrams
Dual-In-Line Package
TL/H/5648–13
Order Number LF351M or LF351N
See NS Package Number M08A or N08E
C
1995 National Semiconductor Corporation
RRD-B30M125/Printed in U. S. A.