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參數資料
| 型號： | LMF40 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 321K |
| 代理商： | LMF40 |
TL/H/10557
L
B
December 1994
LMF40 High Performance 4th-Order
Switched-Capacitor Butterworth Low-Pass Filter
General Description
The LMF40 is a versatile, easy to use, precision 4th-order
Butterworth low-pass filter fabricated using National’s high
performance LMCMOS process. Switched-capacitor tech-
niques eliminate external component requirements and al-
low a clock-tunable cutoff frequency. The ratio of the clock
frequency to the low-pass cutoff frequency is internally set
to 50-to-1 (LMF40-50) or 100-to-1 (LMF40-100). A Schmitt
trigger clock input stage allows two clocking options, either
self-clocking (via an external resistor and capacitor) for
stand-alone applications, or for tighter cutoff frequency con-
trol, an external TTL or CMOS logic compatible clock can
be applied. The maximally flat passband frequency re-
sponse together with a DC gain of 1 V/V allows cascading
LMF40 sections together for higher-order filtering.
Features
Y
Cutoff frequency range of 0.1 Hz to 40 kHz
Y
Cutoff frequency accuracy of
g
1.0%, maximum
Y
Low offset voltage,
g
100 mV, maximum,
g
5V supply
Y
Low clock feedthrough of 5 mV
P-P
, typical
Y
Dynamic range of 88 dB, typical
Y
No external components required
Y
8-pin mini-DIP or 14-pin wide-body small-outline pack-
ages
Y
4V to 14V single/dual supply operation
Y
Cutoff frequency set by external or internal clock
Y
Pin-compatible with MF4
Applications
Y
Communication systems
Y
Instrumentation
Y
Automated control systems
Block and Connection Diagrams
TL/H/10557–1
*
Pin numbers in parentheses are for the 14-pin package
Ordering Information
Industrial (
b
40
§
C
s
T
A
s
a
85
§
C)
Package
LMF40CIN-50, LMF40CIN-100
N08E
LMF40CIWM-50
M14B
LMF40CIWM-100
M14B
Military (
b
55
§
C
s
T
A
s
a
125
§
C)
LMF40CMJ-50, LMF40CMJ-100
J08A
Dual-In-Line Package
TL/H/10557–2
Top View
Small-Outline-Wide-Body Package
TL/H/10557–3
Top View
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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相關代理商/技術參數 |
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| LMF40CIWM-100 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LMF4A102W2851 | 制造商:Vishay Dale 功能描述:KIT LM F 4 A 102 W02851 E3 - Rail/Tube |
| LMF4A103W2851 | 制造商:Vishay Dale 功能描述:KIT LM F 4 A 103 W02851 E3 - Rail/Tube |
| LMF4A104W2851 | 制造商:Vishay Dale 功能描述:KIT LM F 4 A 104 W02851 E3 - Rail/Tube |
| LMF4A502W2851 | 制造商:Vishay Dale 功能描述:KIT LM F 4 A 502 W02851 E3 - Rail/Tube |
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