TL/H/9297
L
February 1995
LF441 Low Power JFET
Input Operational Amplifier
General Description
The LF441 low power operational amplifier provides many
of the same AC characteristics as the industry standard
LM741 while greatly improving the DC characteristics of the
LM741. The amplifier has the same bandwidth, slew rate,
and gain (10 k
X
load) as the LM741 and only draws one
tenth the supply current of the LM741. In addition, the well
matched high voltage JFET input devices of the LF441 re-
duce the input bias and offset currents by a factor of 10,000
over the LM741. A combination of careful layout design and
internal trimming guarantees very low input offset voltage
and voltage drift. The LF441 also has a very low equivalent
input noise voltage for a low power amplifier.
The LF441 is pin compatible with the LM741, allowing an
immediate 10 times reduction in power drain in many appli-
cations. The LF441 should be used where low power
dissipation and good electrical characteristics are the major
considerations.
Features
Y
1/10 supply current of a LM741
200
m
A (max)
50 pA (max)
0.5 mV (max)
10
m
V/
§
C (max)
Y
Low input bias current
Y
Low input offset voltage
Y
Low input offset voltage drift
Y
High gain bandwidth
1 MHz
1 V/
m
s
Y
High slew rate
Y
Low noise voltage for low power
35 nV/
S
Hz
0.01 pA/
S
Hz
Y
Low input noise current
Y
High input impedance
Y
High gain V
O
e
g
10V, R
L
e
10k
10
12
X
50k (min)
Typical Connection
TL/H/9297–1
Ordering Information
LF441XYZ
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
TL/H/9297–2
Top View
Note:
Pin 4 connected to case.
Order Number LF441MH/883
See NS Package Number H08A
Dual-In-Line Package
TL/H/9297–4
Top View
Order Number LF441ACN,
LF441CM or LF441CN
See NS Package Number M08A or N08E
BI-FET
TM
is a trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.