LF355 Datasheet PDF - National Semiconductor
| Part Number | LF355 | |
| Description | JFET Input Operational Amplifiers | |
| Manufacturers | National Semiconductor | |
| Logo |  |
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December 2001
LF155/LF156/LF256/LF257/LF355/LF356/LF357
JFET Input Operational Amplifiers
General Description
These are the first monolithic JFET input operational ampli-
fiers to incorporate well matched, high voltage JFETs on the
same chip with standard bipolar transistors (BI-FET™ Tech-
nology). These amplifiers feature low input bias and offset
currents/low offset voltage and offset voltage drift, coupled
with offset adjust which does not degrade drift or
common-mode rejection. The devices are also designed for
high slew rate, wide bandwidth, extremely fast settling time,
low voltage and current noise and a low 1/f noise corner.
Features
Advantages
n Replace expensive hybrid and module FET op amps
n Rugged JFETs allow blow-out free handling compared
with MOSFET input devices
n Excellent for low noise applications using either high or
low source impedance — very low 1/f corner
n Offset adjust does not degrade drift or common-mode
rejection as in most monolithic amplifiers
n New output stage allows use of large capacitive loads
(5,000 pF) without stability problems
n Internal compensation and large differential input voltage
capability
Applications
n Precision high speed integrators
n Fast D/A and A/D converters
n High impedance buffers
n Wideband, low noise, low drift amplifiers
n Logarithmic amplifiers
n Photocell amplifiers
n Sample and Hold circuits
Common Features
n Low input bias current: 30pA
n Low Input Offset Current: 3pA
n High input impedance: 1012Ω
n Low input noise current:
n High common-mode rejection ratio:
n Large dc voltage gain: 106 dB
100 dB
Uncommon Features
j Extremely
fast settling
time to
0.01%
j Fast slew
rate
j Wide gain
bandwidth
j Low input
noise
voltage
LF155/
LF355
4
5
2.5
20
LF156/
LF256/
LF356
1.5
12
5
12
LF257/
LF357
(AV=5)
1.5
50
20
12
Units
µs
V/µs
MHz
Simplified Schematic
ww*3wpF.iDn LaF3t5a7 Sserhiese. et4U.com
BI-FET™, BI-FET II™ are trademarks of National Semiconductor Corporation.
© 2001 National Semiconductor Corporation DS005646
00564601
www.national.com
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Typical DC Performance Characteristics Curves are for LF155 and LF156 unless otherwise
specified. (Continued)
Supply Current
Supply Current
00564641
Negative Current Limit
00564642
Positive Current Limit
00564643
Positive Common-Mode
Input Voltage Limit
00564644
Negative Common-Mode
Input Voltage Limit
00564645
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5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LF355 electronic component. |
| Information | Total 23 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LF355.PDF Datasheet ] | |
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