参数资料
型号: 5962-8760801VZA
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 取样保持放大器
英文描述: SAMPLE AND HOLD AMPLIFIER, CDSO14
封装: CERAMIC, SOIC-14
文件页数: 1/18页
文件大小: 961K
代理商: 5962-8760801VZA
LF198QML
Monolithic Sample-and-Hold Circuits
General Description
The LF198 is a monolithic sample-and-hold circuit which
utilizes BI-FET technology to obtain ultra-high dc accuracy
with fast acquisition of signal and low droop rate. Operating
as a unity gain follower, dc gain accuracy is 0.002% typical
and acquisition time is as low as 6 s to 0.01%. A bipolar
input stage is used to achieve low offset voltage and wide
bandwidth. Input offset adjust is accomplished with a single
pin, and does not degrade input offset drift. The wide band-
width allows the LF198 to be included inside the feedback
loop of 1 MHz op amps without having stability problems.
Input impedance of 10
10
allows high source impedances to
be used without degrading accuracy.
P-channel junction FET’s are combined with bipolar devices
in the output amplifier to give droop rates as low as 5 mV/min
witha1F hold capacitor. The JFET’s have much lower
noise than MOS devices used in previous designs and do
not exhibit high temperature instabilities. The overall design
guarantees no feed-through from input to output in the hold
mode, even for input signals equal to the supply voltages.
Features
n
Operates from ±5V to ±18V supplies
n
Less than 10 s acquisition time
n
TTL, PMOS, CMOS compatible logic input
n
0.5 mV typical hold step at C
h = 0.01 F
n
Low input offset
n
0.002% gain accuracy
n
Low output noise in hold mode
n
Input characteristics do not change during hold mode
n
High supply rejection ratio in sample or hold
n
Wide bandwidth
Logic inputs on the LF198 are fully differential with low input
current, allowing direct connection to TTL, PMOS, and
CMOS. Differential threshold is 1.4V. The LF198 will operate
from ±5V to ±18V supplies.
Ordering Information
NSC Part Number
JAN Part Number
NSC Package Number
Package Description
LF198H/883
5962–8760801GA
H08C
8LD Metal Can
LF198WG-QMLV
5962–8760801VZA
WG14A
14LD Ceramic SOIC
LF198WG/883
5962–8760801QZA
WG14A
14LD Ceramic SOIC
Connection Diagrams
Small-Outline Package
Metal Can Package
20122215
See NS Package Number WG14A
20122214
See NS Package Number H08C
February 2005
LF198QMLMonolithic
Sample-and-Hold
Circuits
2005 National Semiconductor Corporation
DS201222
www.national.com
相关PDF资料
PDF描述
5962-8760801GX SAMPLE AND HOLD AMPLIFIER, 25 us ACQUISITION TIME, MBCY8
5962-8771001GA DUAL OP-AMP, 500 uV OFFSET-MAX, 1 MHz BAND WIDTH, MBCY8
5962-8771002GA DUAL OP-AMP, 500 uV OFFSET-MAX, 1 MHz BAND WIDTH, MBCY8
5962-8771001PA DUAL OP-AMP, 500 uV OFFSET-MAX, 1 MHz BAND WIDTH, CDIP8
5962-8771002PA DUAL OP-AMP, 500 uV OFFSET-MAX, 1 MHz BAND WIDTH, CDIP8
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