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PDF LF442 Data sheet ( Hoja de datos )
| Número de pieza | LF442 | |
| Descripción | Dual Low Power JFET Input Operational Amplifier | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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April 1999
LF442
Dual Low Power JFET Input Operational Amplifier
General Description
The LF442 dual low power operational amplifiers provide
many of the same AC characteristics as the industry stan-
dard LM1458 while greatly improving the DC characteristics
of the LM1458. The amplifiers have the same bandwidth,
slew rate, and gain (10 kΩ load) as the LM1458 and only
draw one tenth the supply current of the LM1458. In addition
the well matched high voltage JFET input devices of the
LF442 reduce the input bias and offset currents by a factor of
10,000 over the LM1458. A combination of careful layout de-
sign and internal trimming guarantees very low input offset
voltage and voltage drift. The LF442 also has a very low
equivalent input noise voltage for a low power amplifier.
The LF442 is pin compatible with the LM1458 allowing an
immediate 10 times reduction in power drain in many appli-
cations. The LF442 should be used where low power dissi-
pation and good electrical characteristics are the major con-
siderations.
Features
n 1/10 supply current of a LM1458: 400 µA (max)
n Low input bias current: 50 pA (max)
n Low input offset voltage: 1 mV (max)
n Low input offset voltage drift: 10 µV/˚C (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: 1012Ω
n High gain VO = ±10V, RL = 10k: 50k (min)
Typical Connection
Connection Diagrams
Metal Can Package
DS009155-1
Ordering Information
LF442XYZ
X indicates electrical grade
Y indicates temperature range
“M” for military
“C” for commercial
Z indicates package type
“H” or “N”
BI-FET II™ is a trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS009155
DS009155-2
Pin 4 connected to case
Top View
Order Number LF442AMH or LF442MH
or LF442MH/883
See NS Package Number H08A
Dual-In-Line Package
DS009155-4
Top View
Order Number LF442ACN or LF442CN
See NS Package Number N08E
www.national.com
1 page  
Typical Performance Characteristics (Continued)
Common-Mode Rejection
Ratio
Power Supply Rejection
Ratio
Equivalent Input Noise
Voltage
DS009155-32
Open Loop Voltage Gain
Output Impedance
DS009155-33
Inverter Settling Time
DS009155-34
DS009155-35
Pulse Response RL = 10 kΩ, CL = 10 pF
Small Signal Inverting
DS009155-36
DS009155-37
Small Signal Non-Inverting
DS009155-7
5
DS009155-8
www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
TO-5 Metal Can Package (H)
Order Number LF442AMH or LF442MH/883
NS Package Number H08A
11 www.national.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LF442.PDF ] | |
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