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| 型号： | MF6 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | 6th Order Switched Capacitor Butterworth Lowpass |
| 中文描述： | 6阶巴特沃斯低通开关电容 |
| 文件页数： | 1/20页 |
| 文件大小： | 878K |
| 代理商： | MF6 |
MF6
6th Order Switched Capacitor Butterworth Lowpass
Filter
General Description
The MF6 is a versatile easy to use, precision 6th order But-
terworth lowpass active filter. Switched capacitor techniques
eliminate external component requirements and allow a
clock tunable cutoff frequency. The ratio of the clock fre-
quency to the lowpass cutoff frequency is internally set to 50
to 1 (MF6-50) or 100 to 1 (MF6-100). A Schmitt trigger clock
input stage allows two clocking options, either self-clocking
(via an external resistor and capacitor) for stand-alone appli-
cations, or an external TTL or CMOS logic compatible clock
can be used for tighter cutoff frequency control. The maxi-
mally flat passband frequency response together with a DC
gain of 1 V/V allows cascading MF6 sections for higher order
filtering. In addition to the filter, two independent CMOS op
amps are included on the die and are useful for any general
signal conditioning applications.
Features
n
No external components
n
Cutoff frequency accuracy of
±
0.3% typical
n
Cutoff frequency range of 0.1 Hz to 20 kHz
n
Two uncommitted op amps available
n
5V to 14V total supply voltage
n
Cutoff frequency set by external or internal clock
Block and Connection Diagrams
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
All Packages
DS005065-2
Top View
Order Number MF6CWM-50
or MF6CWM-100
See NS Package Number M14B
DS005065-1
June 1999
M
1999 National Semiconductor Corporation
DS005065
www.national.com
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