MF5CWM National Semiconductor, MF5CWM Datasheet

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MF5CWM

Manufacturer Part Number
MF5CWM
Description
IC FILTER MONO SW CAP SO14
Manufacturer
National Semiconductor
Datasheet

Specifications of MF5CWM

Filter Type
Universal Switched Capacitor
Frequency - Cutoff Or Center
30kHz
Number Of Filters
1
Max-order
2nd
Voltage - Supply
8 V ~ 14 V
Mounting Type
*
Package / Case
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*MF5CWM

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MF5CWM
Manufacturer:
NS/国半
Quantity:
20 000
C 1995 National Semiconductor Corporation
MF5 Universal Monolithic Switched Capacitor Filter
General Description
The MF5 consists of an extremely easy to use general pur-
pose CMOS active filter building block and an uncommitted
op amp The filter building block together with an external
clock and a few resistors can produce various second order
functions The filter building block has 3 output pins One of
the output pins can be configured to perform highpass all-
pass or notch functions and the remaining 2 output pins
perform bandpass and lowpass functions The center fre-
quency of the filter can be directly dependent on the clock
frequency or it can depend on both clock frequency and
external resistor ratios The uncommitted op amp can be
used for cascading purposes for obtaining additional all-
pass and notch functions or for various other applications
Higher order filter functions can be obtained by cascading
several MF5s or by using the MF5 in conjuction with the
MF10 (dual switched capacitor filter building block) The
MF5 is functionally compatible with the MF10 Any of the
classical filter configurations (such as Butterworth Bessel
Cauer and Chebyshev) can be formed
Block and Connection Diagrams
TL H 5066
All Packages
Top View
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Low cost
14-pin DIP or 14-pin Surface Mount (SO) wide-body
package
Easy to use
Clock to center frequency ratio accuracy
Filter cutoff frequency stability directly dependent on
external clock quality
Low sensitivity to external component variations
Separate highpass (or notch or allpass) bandpass low-
pass outputs
f
Operation up to 30 kHz (typical)
Additional uncommitted op-amp
o c
Q range up to 200 kHz
See NS Package Number N14A
See NS Package Number M14B
TL H 5066 – 2
Order Number MF5CWM
Order Number MF5CN
RRD-B30M115 Printed in U S A
TL H 5066 – 1
g
February 1995
0 6%

Related parts for MF5CWM

MF5CWM Summary of contents

Page 1

... Separate highpass (or notch or allpass) bandpass low- Y pass outputs f Q range up to 200 kHz Operation kHz (typical) Y Additional uncommitted op-amp Y All Packages Order Number MF5CN See NS Package Number N14A Order Number MF5CWM See NS Package Number M14B TL H 5066 – 2 Top View February 1995 5066 – 1 RRD-B30M115 Printed ...

Page 2

... CLK ratio) os3 See AN-450 ‘‘Surface Mounting Methods and Their Effect on Product Reliability’’ for other methods of soldering sur- face mount devices 14V Input Voltage (any pin) 500 mW Operating Temp Range 150 C MF5CN MF5CWM 260 C 215 C 220 unless otherwise noted Boldface limits ...

Page 3

Filter Electrical Characteristics limits apply over temperature T T MIN Parameter Output BP LP pins Swing (Min pin Dynamic Range (Note 4) Maximum Output Short Circuit Source Current (Note 5) Sink OP-AMP Electrical Characteristics ...

Page 4

Pin Description LP(14) BP(1) The second order lowpass bandpass N AP HP(2) and notch allpass highpass outputs The LP and BP outputs can typically sink 1 mA and source 3 mA The output can typically sink 1 ...

Page 5

Typical Performance Characteristics (Continued) Supply Current vs Temperature 1 0 Definitions of Terms f the frequency of the external clock signal applied to CLK pin 8 f center frequency of the second order function complex o pole pair f is ...

Page 6

Definition of Terms (Continued 5066– 11 (a) FIGURE 4 2nd-Order Notch Response TL H 5066– 13 (a) FIGURE 5 2nd-Order All-Pass Response (a) Bandpass (d) Notch FIGURE 6 Responses of various 2nd-order filters as a function ...

Page 7

Modes of Operation The MF5 is a switched capacitor (sampled data) filter To fully describe its transfer functions a time domain approach is appropriate Since this is cumbersome and since the MF5 closely approximates continuous filters the following ...

Page 8

Modes of Operation (Continued) MODE 2 Notch 2 Bandpass Lowpass f (See Figure center frequency CLK CLK 100 ...

Page 9

Modes of Operation (Continued) MODE and Notch with External Op amp (See Figure CLK CLK 100 ...

Page 10

Modes of Operation (Continued) MODE 5 Numerator Complex Zeros BP LP (See Figure CLK 100 CLK f 1 ...

Page 11

Modes of Operation (Continued) TABLE I Summary of Modes Realizable filter types (e g low-pass) denoted by asterisks Unless otherwise noted gains of various filter outputs are inverting and adjustable by resistor ratios Mode (2) ...

Page 12

Applications Information FIGURE 16 2nd-Order Butterworth Low-Pass Filter of Design Example For FIGURE 17 Butterworth Low-Pass Circuit of Example but Designed for Single-Supply Operation (Continued) f CLK 50 Connect Pin and ...

Page 13

Applications Information TL H 5066– 27 (a) Resistive Divider with Decoupling Capaciter FIGURE 18 Three Ways of Generating For a cutoff frequency of 200 Hz the external clock can be either 10 kHz with pin 9 connected to ...

Page 14

Applications Information Mode 1 and Mode OS(N) OS1 OLP OS(BP) OS3 OS(LP) OS(N) OS2 Mode OS3 V ...

Page 15

Applications Information For most applications the outputs are AC coupled and DC offsets are not bothersome unless large signals are applied to the filter input However larger offset voltages will cause clipping to occur at lower ac signal ...

Page 16

... Italiano National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications SO Package Order Number MF5CWM NS Package Number M14B Molded Dual-In-Line Package (N) ...

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