MF10CN ,Kual Universal Switched Capacitor FilterGeneral Description
The MF10 is a dual 2nd order, switched capacitor, state
variable filter, Ea ..
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MF10BN-MF10BWP-MF10CJ-MF10CN-MF10CWP
Kual Universal Switched Capacitor Filter
f9-ICW7, Rev l. 7/96
__General Desertption
The MF10 is a dual 2nd order, switched capacitor, state
variable filter. Each of the two filter sections uses two
switched capacitor integrators and an op amp to _
generate a second order function. The location of the
poles (and thus the center frequency and Q) is deter-
mined by the frequency of an external clock and 2 to 4
external resistors. No external capacitors are used.
Each of the two filter sections ofthe MF10 can generate
all standard 2nd order tunqtittntc.taipipaialgtwpass, . T
highpass, notch (band-reject), complex zeroes and
allpass functions. Three of these functions are simul-
taneously available. The frequency of the 2nd order
poles is accurate to t0.2% and the Q is accurate to
within 2%.
Fourth order filters can be made by cascading the two
2nd order filter sections of the MF10, and higher order
filters can easily be made by cascading more MF10s.
The excellent accuracy and stability of MF10 based
filters eliminates the complex, costly tuning normally
required in the production of high order (multipoie)
filters. Design equations for Butterworth, Bessel,
Chebyshev, and Cauer (Elliptic) filters are provided.
Applications
This versatile device is used for a wide range of filtering
applications such as:
Tu nabie active filters
Multi-pole filters
Anti-aliasing filters
Adaptive Filtering
Phase locked loops
Signal Processing/
Conditioning
Typical Operatlng Circuit
2filALiih2'ahMM]
Dual Universal
Switched Capacitor Filter
Fee tures
No External Capacitors Required
Low Sensltlvlty to External Component Variation
Excellent Frequency and tt Stablllty
Easily Cascaded for Muitlpole Filters
Filter Frequency Set brfittemal Clqck frequency
0.2% Clock to Center Frequency Ratio Accuracy -
Hlghpass, Lowpass, Bandpass, Notch, and Allpass
Filter Functlons.
Up to 3 Simultaneous Filler Function Outputs
Up to 30kHz Operation
Easy to use-Design Directly from the Data Sheet
Monolithic, Low Power CMOS Design
Ordering Information
PART TEMP. RANGE PlN-PACKAGE I
MF1OBN 0''C to +70°C 20 Lead Plastc DIP l
MF1OCN (Y'C to +70°C 20 Lead Plastic DIP
MF1OBWP 0°C to +70°C 20 Lead Wide so
MHOCWP 0''C to +70°C 20 Lead Wide so
MF1OBJ 0°C to +70’C 20 Lead CERDIP'
MF1OCJ 0°C to +70°C 20 Lead CERDIP'
MF1OCCID 0°C to +70°C Dice'
. Contact Factory
Pin Configuration
TOP VIEW .
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SPA E E ips
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MASUM su E MF10 E 51;
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o T 0.54 l o - " . V
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l War E 13 7y
GTH ORDER. Zle LOWPASS LS" E 12 SGIIDOICL
HUWERWORTN FILTER
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DIP/SO
MAXIM Maxim Integrated Products 1
a the latest literature: http://www.maxim-lc.com,
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Dual Universal
Switched Capacitor Filter
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V' to V-) ........
Power Dissipation ..............
Operating Temperature .........
.................. 14V
.............. 500mW
......... ty't3 to +70°C
Storage Temperature ................. -65° C to +160° C
Lead Temperature (Soldering, 10 seconds) ...... +300°C
Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to tho gevice. Theseare stress Igtings only and
functional operation of the device at theseor any other conditions above those indicated in the operauqnat sections of the specifications is not
implied, Exposure to absolute maximum rating conditions tor extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS (Complete Filter)
(Vs = tw, T. = +25'' C)
e.a-" _
PARAMEERA CdNDITIONS MIN TYP MAX UNITS
Frequency Range , fo X to c, 200 kHz 20 30 kHz
Clock to Center Frequency
Ratio. 'CLK/fg
MFIOB, Pin 12 High, Q - 10 49.94 t 0.2% 20.6%
MF1OC_ fo X a S 50kHz. Mode 1' 49.94 t 0.2% :1.5%
MFIOB, Pin Q at Mid Supplies 99.35 t 0.2% :0.6%
MF1OC_ O T IO, fo X Q <, SOkHz. Mode 1 99.35 t 0.2% t1.5%
Q Accuracy (Q Deviation
fr'om an Ideal Continuous :2; fii.iz,502dze 1 "c2% t6%
Filter)
Pin 12 High (-50:1) t10 ppm/“C
Pin 12 Mid Supplies (400:1) $100 ppm/''C
to Temperature Coefficient fo x a S 100kHz. Mode 1
External Clock Temperature l
_ Independent A
to X 0 S 100kHz, Q Setting t500 ppm/°C
0 Temperature Coefficient Resistors Temperature
Independent
DC Low Pass Gain Accuracy Mode 1, R1 = R21: 10m tl t2 'h
Crosstalk 50 dB
Clock Feedthrough 10 mV
Maximum Clock Frequency 1 1.5 MHz
Power Supply Current 7 10 L mA
ELECTRICAL CHARACTERISTICS (Internal Op Amps)
(Vs = tw, TA = '25''C)
PARAMETER CONDITIONS MIN WP MAX UNITS -]
iupgyyoitage - t4 t5 v_ _
Voltage Swing (Pins 1. 2, 19, 20) RL = SH)
1 MF1OB_ t40 :4.1 v
MF1OC_ _l, t3.8 t3.9 V
' Voltage Swwg (Pins 3 and 18) Ru = 3.5m
MF1CB_ t4.0 t4,1 V
MF‘DC_ t38 :39 V
Output snort Circuit Current
Source 3 I mA l
Sink 1.5 mA
l Gain Bandwidth Product 2.5 - MI”
Slew Rate 7 L V “S
- . - l __J 7
._._/VI/JXl/VI
