LF444AMD National Semiconductor, LF444AMD Datasheet
LF444AMD
Manufacturer Part Number
LF444AMD
Description
Quad Low Power JFET Input Operational Amplifier
Manufacturer
National Semiconductor
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© 1999 National Semiconductor Corporation
LF444
Quad Low Power JFET Input Operational Amplifier
General Description
The LF444 quad low power operational amplifier provides
many of the same AC characteristics as the industry stan-
dard LM148 while greatly improving the DC characteristics
of the LM148. The amplifier has the same bandwidth, slew
rate, and gain (10 k
one fourth the supply current of the LM148. In addition the
well matched high voltage JFET input devices of the LF444
reduce the input bias and offset currents by a factor of
10,000 over the LM148. The LF444 also has a very low
equivalent input noise voltage for a low power amplifier.
The LF444 is pin compatible with the LM148 allowing an im-
mediate 4 times reduction in power drain in many applica-
tions. The LF444 should be used wherever low power dissi-
pation and good electrical characteristics are the major
considerations.
Simplified Schematic
Ordering Information
LF444XYZ
X indicates electrical grade
Y indicates temperature range
Z indicates package type “D”, “M” or “N”
BI-FET
“M” for military, “C” for commercial
™
and BI-FET II
™
are trademarks of National Semiconductor Corporation.
load) as the LM148 and only draws
1/4 Quad
DS009156
DS009156-1
Features
n
n Low input bias current: 50 pA (max)
n High gain bandwidth: 1 MHz
n High slew rate: 1 V/µs
n Low noise voltage for low power
n Low input noise current
n High input impedance: 10
n High gain V
Connection Diagram
1
⁄
4
See NS Package Number D14E, M14A or N14A
supply current of a LM148:
LF444ACN, LF444CN or LF444MD/883
Order Number LF444AMD, LF444CM,
O
=
Dual-In-Line Package
±
10V, R
Top View
L
= 10k: 50k (min)
12
200 µA/Amplifier (max)
www.national.com
May 1998
DS009156-2
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