MF6CN-100 National Semiconductor, MF6CN-100 Datasheet

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MF6CN-100

Manufacturer Part Number
MF6CN-100
Description
FILTER ORDER SW CAP LOWPASS
Manufacturer
National Semiconductor
Datasheet

Specifications of MF6CN-100

Filter Type
Butterworth, Lowpass Switched Capacitor
Frequency - Cutoff Or Center
20kHz
Number Of Filters
1
Max-order
6th
Voltage - Supply
5 V ~ 14 V
Mounting Type
*
Package / Case
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*MF6CN-100

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MF6CN-100
Manufacturer:
NSC
Quantity:
5 510
C 1995 National Semiconductor Corporation
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 tech-
niques eliminate external component requirements and al-
low a clock tunable cutoff frequency The ratio of the clock
frequency 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 applications or an external TTL or CMOS logic com-
patible clock can be used for tighter cutoff frequency con-
trol The maximally flat passband frequency response to-
gether with a DC gain of 1 V V allows cascading MF6 sec-
tions 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
Block and Connection Diagrams
TRI-STATE is a registered trademark of National Semiconductor Corporation
TL H 5065
Features
Y
Y
Y
Y
Y
Y
Y
No external components
14-pin DIP or 14-pin wide-body S O package
Cutoff frequency accuracy of
Cutoff frequency range of 0 1 Hz to 20 kHz
Two uncommitted op amps available
5V to 14V total supply voltage
Cutoff frequency set by external or internal clock
TL H 5065 – 1
See NS Package Number M14B
See NS Package Number N14A
See NS Package Number J14A
Order Number MF6CWM-50
Order Number MF6CN-50
Order Number MF6CJ-50
or MF6CWM-100
g
or MF6CN-100
or MF6CJ-100
All Packages
0 3% typical
Top View
RRD-B30M75 Printed in U S A
December 1994
TL H 5065 – 2

Related parts for MF6CN-100

MF6CN-100 Summary of contents

Page 1

... Cutoff frequency set by external or internal clock Y All Packages Top View Order Number MF6CWM-50 or MF6CWM-100 See NS Package Number M14B Order Number MF6CN-50 or MF6CN-100 TL H 5065 – 1 See NS Package Number N14A Order Number MF6CJ-50 or MF6CJ-100 See NS Package Number J14A RRD-B30M75 Printed December 1994 ...

Page 2

... MF6CN-50 MF6CN-100 20 mA MF6CWM-50 MF6CWM-100 500 mW MF6CJ-50 MF6CJ-100 150 Supply Voltage (V 800V 260 C 300 C 215 C 220 C The following specifications apply for f all other limits MIN MAX MF6CWM-50 MF6CWM-100 MF6CN-50 MF6CN-100 Tested Design Typical Limit Limit (Note 8) (Note 9) (Note 10 20k 0 1 10k ...

Page 3

... Hz e Attenuation MF6-50 f 250 kHz e CLK Rate f 6000 8000 MF6-100 f 250 kHz e CLK f 3000 4000 (Continued) The following specifications apply for all other limits T MIN MAX MF6CWM-50 MF6CWM-100 MF6CN-50 MF6CN-100 Tested Design Typical Typical Limit Limit (Note 8) (Note 8) (Note 9) (Note 10 10k ...

Page 4

... Input Offset Voltage Input Bias Current CMRR (Op-Amp 2 Only CM1 CM2 Output Voltage Swing Maximum Output Short Source Circuit Current (Note 6) Sink Slew Rate DC Open Loop Gain Gain Bandwidth Product MF6CN-50 MF6CN-100 MF6CWM-50 MF6CWM-100 Tested Design Typical Limit Limit (Note 8) (Note 9) (Note 10 ...

Page 5

... C and the typical junction-to-ambient thermal resistance of the MF6CN when board mounted For the MF6CJ this number e JMAX decreases For MF6CWM The following specifications apply for all other limits T MIN MAX MF6CN-50 MF6CN-100 MF6CWM-50 MF6CWM-100 Tested Design Typical Limit Limit (Note 8) (Note 9) (Note 10 ...

Page 6

Typical Performance Characteristics Schmitt Trigger Threshold Voltage vs Power Supply Voltage Crosstalk from Filter to Op-Amps (MF6-50) Crosstalk from Filter Crosstalk from Either Op-Amp to Op-Amps (MF6-100) to Filter Output (MF6-50) Crosstalk from Either Op-Amp Equivalent Input Noise to Filter ...

Page 7

Typical Performance Characteristics Positive Voltage Swing vs Power Supply Voltage (Op Amp Output) Negative Voltage Swing vs Power Supply Voltage (Filter and Op Amp Outputs) Power Supply Current vs Temperature (Continued) Positive Voltage Swing vs Positive Voltage Swing vs Power ...

Page 8

Typical Performance Characteristics f f Deviation CLK c vs Clock Frequency f f Deviation CLK c vs Clock Frequency DC Gain Deviation vs Temperature DC Gain Deviation vs Temperature (Continued Deviation f CLK c CLK vs Temperature vs ...

Page 9

Crosstalk Test Circuits Pin Descriptions (Pin Numbers) Pin Description FILTER OUT (3) The output of the lowpass filter It will typically sink and source 3 mA and swing to within 1V of each supply rail FILTER IN ...

Page 10

Pin Descriptions (Pin Numbers) (Continued) Pin Description L Sh (12) When the voltage level at this input exceeds 25%( the internal tri-state a buffer is disabled allowing the CLK R pin to become the clock input for the ...

Page 11

Application Hints (Continued) a) Resistor Biasing of AGND b) Using Op-Amp 2 to Buffer AGND FIGURE 4 Single Supply Operation 5065 – 5065 – 15 ...

Page 12

Application Hints (Continued) Schmitt-trigger threshold voltage levels can change signifi- cantly causing the R C oscillator’s frequency to vary greatly from part to part Where accuracy required an external clock can be c used to drive the ...

Page 13

Application Hints (Continued) MF6-100 so for the MF6-100 100 c c CLK and ...

Page 14

Designing with the MF6 (Continued) where n is the order of the filter A is the minimum stop- min band attenuation (in dB) desired at frequency f the passband ripple or attenuation (in dB) at frequency f the result of ...

Page 15

Designing with the MF6 (Continued) FIGURE 10a One MF6-50 vs Two MF6-50s Cascaded FIGURE 9 Cascading Two MF6s TL H 5065– 26 FIGURE 10b Phase Response of Two Cascaded MF6-50s 5065 – 5065 – ...

Page 16

Designing with the MF6 (Continued) FIGURE 11b MF6-50 ‘‘Notch’’ Filter Amplitude Response FIGURE 11a ‘‘Notch’’ Filter TL H 5065– 5065 – 28 ...

Page 17

Designing with the MF6 (Continued CHANGING CLOCK FREQUENCY INSTANTANEOUSLY The MF6 will respond favorably to a sudden change in clock frequency Distortion in the output signal occurs at the tran- sition of the clock frequency and lasts approximately ...

Page 18

Designing with the MF6 (Continued when Design Procedure pick ...

Page 19

Physical Dimensions inches (millimeters) Order Number MF6CJ-50 or MF6CJ-100 Order Number MF6CWM-50 or MF6CWM-100 Cavity Dual-In-Line Package (J) NS Package Number J14A Small Outline Wide Body (M) NS Package Number M14B 19 ...

Page 20

... Physical Dimensions inches (millimeters) (Continued) Order Number MF6CN-50 or MF6CN-100 LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or ...

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