IQXF-45M30AU - C-MAC MicroTechnology

CRYSTAL FILTERS - Section Contents

Specifying Crystal Filters.......................................................................128

Standard Crystal Filters .......................................................................131

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CRYSTAL

FILTERS

SPECIFYING CRYSTAL FILTERS

A typical Crystal Filter specification reads like this:

45.0MHz ±7.5kHz ±15kHz 3 2 90 3k 20 UM1

Centre

Frequency, f0

Passband

Stopband (dB)

Insertion Loss (dB)

Ripple

Guaranteed Attenuation

Terminating Impedances

Operating Temperature Range

Holder

Definitions

The following terms and definitions will aid you in

specifying a filter for your application. Please refer to

p134 for a guide to ordering your filter.

Centre Frequency (f0)

nThe arithmetic mean of the passband limits or the

defined nominal frequency

Passband (BW1)

nThe range of frequencies attenuated less than a

specified value, typically 3dB or 6dB.

Stopband (BW2)

nThe range of frequencies attenuated greater than a

specified minimum level of attenuation, typically

40dB or 60dB.

Insertion Loss

nThe loss at centre frequency or at the maximum

transmission level normally expressed in dB as a re-

sult of inserting the filter into the circuit

Ripple

nThe amplitude difference in dB between the maxi-

mum passband peak and the minimum passband

valley. Both peak and valley are defined by a sur-

rounding change in slope, i.e. The sign of the am-

plitude response.

Guaranteed Attenuation

nA minimum attenuation in dB by which a specified

frequency band either side of F0must be guaran-

teed.

Source & Load Impedance

nSource Impedance: The impedance driving the filter.

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A M P L IT U D E & G R O U P D E L A Y

CHEBYSHEV BESSEL BU TTERW O RTH

DELAY

ATTENUATION IN dB

GROUP DELAY t

Attenuation and Group Delay Graph

CRYSTAL

FILTERS

nLoad Impedance: The impedance of the circuit ter-

minating the filter.

Shape Factor

nRatio of bandwidths, normally stopband and pass-

band of filter.

Spurious Attenuation

nThe specified minimum level of attenuation re-

ceived by all non-harmonic related resonances of

each crystal resonator within the filter network.

Maximum Drive Level

nFor continuous operation normally specified in

dBm.

Linear Phase Characteristics

nThe term phase shift is defined as ‘phase shift of

output voltage with respect to input voltage as a

function of frequency’. There are two ways to spec-

ify this:-

By directly defining the slope per segment of band-

width

N2£Ndegrees/kHz £N1

or by the phase shift derivative with respect to

frequency, i.e. Group Delay

()

Tg ff

=´

360

–

where Tg = Group delay in seconds

and j1&j2are phase shift at frequency f1&f2

(measured in degrees and Hertz)

nThe phase slope is proportional to the number of

poles and inversly proportional to bandwidth. The

2nd order characteristic is dependant upon filter

design i.e. Butterworth, Chebychev, Bessel, how-

ever for a given number of poles phase distortion

will increase with selectivity.

nPhase linearity is a different parameter and is sensi-

tive to ambiant conditions such as temperature, vi-

bration & termination impedances.

Inband Intermodulation Distortion

nThe attenuation, in dB, of 3rd and higher order sig-

nal products, inband, relative to the power level of

two signals placed within the passband.

Out of Band Intermodulation Distortion

nThe attenuation, in dB, of 3rd and higher order sig-

nal products, inband, relative to the power level of

two signals placed in the stopband, or one tone in

the transition region and the other in the stopband.

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BW T TRANSITION BAND

SPURIOUS ATTEN.

STOPBAND ATTEN.

0dB

=BW 2

BW 1

IN S E R T IO N

LOSS

RIPPLE

BANDW IDTH

B W 1

SHAPE

FACTOR

BANDW IDTH BW 2

Filter Characteristics

CRYSTAL

FILTERS

Theoretical Characteristics

No. of poles Type of filter Magnitude shape factors for 10% phase linearity (theoretical values)

BA/BP BU/BP ONDUL. BU dB BA/BU* Notes

4 CHEB. 5

CHEB. 1

S.L.P.

BUTTER

GAUSS6

BESSEL

4.5

4.15

5.6

7.1

8.5

0.20

0.40

0.68

0.45

1.75

1.18

0.5

0.1

1.5

11.2

6.1

12.5

7.1

8.5

BP: pass band 3 dB

BU: 10% phase

linearity band

BA: stop band 60 dB

6 CHEB. 5

CHEB. 1

S.L.P.

BUTTER

GAUSS6

BESSEL

2.1

2.3

2.75

3.15

3.4

5.45

0.15

0.50

0.70

0.50

0.90

1.70

0.5

0.1

1.5

2.5

9.5

13.8

4.6

3.9

6.3

3.7

5.4

*BA/BU (if BU <BP)

BA/BP (if BU >BP)

No. of poles Type of filter Bandwidth relative group delay variation (%) (theoretical values)

0.3 × BP 0.6 × BP 0.9 × BP 1 × BP Value of T at Fo

T in seconds/BP in Hz

4 CHEB. 5

CHEB. 1

S.L.P.

BUTTER

GAUSS6

BESSEL

19.4

6.5

5.3

4.7

22.6

6.4

23.2

142

112

4.5

150

125

4.5

0.95/BP

1.03/BP

0.83/BP

0.71/BP

0.66/BP

6 CHEB. 5

CHEB. 1

S.L.P.

BUTTER

GAUSS6

BESSEL

2.2

3.1

2.2

18.8

120

116

9.5

232

160

210

1.53/BP

1.54BP

1.44/BP

1.24/BP

4.14/BP

0.85/BP

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B P 3 d B - 6 P o le s

SLP

BES

BUT

Attenuation - 6 Poles

Group delay

Frequency Frequency

1234567

3

2

1

Am plitude M agnitude

Tim e

CRYSTAL

FILTERS

STANDARD CRYSTAL FILTERS

MONOLITHIC CRYSTAL FILTERS

Model Centre

Frequency

Passband

Width

@ –3dB

Vibration

Mode

Attenuation Bandwidth Poles Ripple

(max.)

Ins. Loss

(ax)

Terminating

Impedance

(W//pF)

Holder

IQXF-10M08A 10.7MHz ±3.75kHz Fundamental ±12.5kHz –18dB 2 1.0dB 2.0dB 1.5k//5 HC49/T

IQXF-10M15A 10.7MHz ±7.5kHz Fundamental ±25.0kHz –18dB 2 1.0dB 2.0dB 3k//2 HC49/T

IQXF-10M30A 10.7MHz ±15.0kHz Fundamental ±50.0kHz –18dB 2 0.5dB 2.0dB 5k//0 HC49/T

IQXF-21M07AU 21.4MHz ±3.75kHz Fundamental ±18.0kHz –20dB 2 0.5dB 1.5dB 850//6 UM1

IQXF-21M07BU 21.4MHz ±3.75kHz Fundamental ±14.0kHz –40dB 4 1.0dB 2.5dB 850//5 UM1 x 2

IQXF-21M15AU 21.4MHz ±7.5kHz Fundamental ±25.0kHz –18dB 2 0.5dB 1.5dB 1.5k//2 UM1

IQXF-21M15BU 21.4MHz ±7.5kHz Fundamental ±25.0kHz –40dB 4 1.0dB 2.5dB 1.5k//2 UM1 x 2

IQXF-21M30AU 21.4MHz ±15.0kHz Fundamental ±45.0kHz –15dB 2 0.5dB 1.5dB 3.0k/0.5 UM1

IQXF-21M30BU 21.4MHz ±15.0kHz Fundamental ±50.0kHz –40dB 4 1.0dB 2.5dB 3.0k//–0.5 UM1 x 2

IQXF-21M30C 21.4MHz ±15.0kHz Fundamental ±50.0kHz –65dB 6 2.0dB 2.5dB 2.2k//0.5 MF-61

IQXF-21M30D 21.4MHz ±15.0kHz Fundamental ±50.0kHz –80dB 8 2.0dB 2.0dB 2.2k//0.5 MF-61

IQXF-45K07AU 45.0MHz ±3.75kHz Fundamental ±12.5kHz –10dB 2 1.0dB 2.5dB 300//10 UM1

IQXF-45K07BU 45.0MHz ±3.75kHz Fundamental ±12.5kHz –30dB 4 1.0dB 4.0dB 300//8 UM1 x 2

IQXF-45K15AU 45.0MHz ±7.5kHz Fundamental ±25.0kHz –15dB 2 1.0dB 2.0dB 650//4.5 UM1

IQXF-45K15BU 45.0MHz ±7.5kHz Fundamental ±25.0kHz –30dB 4 1.0dB 3.0dB 600//1.5 UM1 x 2

IQXF-45K30AU 45.0MHz ±15.0kHz Fundamental ±50.0kHz –15dB 2 1.0dB 2.0dB 800//1.5 UM1

IQXF-45K30BU 45.0MHz ±15.0kHz Fundamental ±60.0kHz –40dB 4 1.0dB 3.0dB 800//1.0 UM1 x 2

IQXF-45M07AU 45.0MHz ±3.75kHz 3rd Overtone ±12.5kHz –10dB 2 1.0dB 2.5dB 2.5k//–0.5 UM1

IQXF-45M07BU 45.0MHz ±3.75kHz 3rd Overtone ±12.5kHz –30dB 4 1.0dB 4.0dB 2.5k//–0.5 UM1 x 2

IQXF-45M15AU 45.0MHz ±7.5kHz 3rd Overtone ±25.0kHz –18dB 2 1.0dB 3.0dB 3k//0 UM1

IQXF-45M15BU 45.0MHz ±7.5kHz 3rd Overtone ±30.0kHz –40dB 4 1.0dB 3.0dB 4k//–1.0 UM1 x 2

IQXF-45M20AU 45.0MHz ±10.0kHz 3rd Overtone ±30.0kHz –15dB 2 1.0dB 2.0dB 5k//–1.0 UM1

IQXF-45M20BU 45.0MHz ±10.0kHz 3rd Overtone ±40.0kHz –35dB 4 1.0dB 3.0dB 5k//–1.0 UM1 x 2

IQXF-45M30AU 45.0MHz ±15.0kHz 3rd Overtone ±50.0kHz –15dB 2 1.0dB 2.0dB 8k//–1.0 UM1

IQXF-45M30BU 45.0MHz ±15.0kHz 3rd Overtone ±50.0kHz –30dB 4 1.0dB 3.0dB 8k//–1.0 UM1 x 2

IQXF-91M15AU 90.0MHz ±7.5kHz 3rd Overtone ±30.0kHz –15dB 2 1.0dB 2.0dB 1.4k//0 UM1

IQXF-91M15BU 90.0MHz ±7.5kHz 3rd Overtone ±25.0kHz –25dB 4 1.0dB 3.5dB 1.4k//0 UM1 x 2

IQXF-91M20AU 90.0MHz ±10.0kHz 3rd Overtone ±40.0kHz –15dB 2 1.0dB 2.0dB 1.5k//–1.0 UM1

IQXF-91M20BU 90.0MHz ±10.0kHz 3rd Overtone ±40.0kHz –35dB 4 1.0dB 3.0dB 1.5k//–1.0 UM1 x 2

IQXF-91M30AU 90.0MHz ±15.0kHz 3rd Overtone ±50.0kHz –15dB 2 1.0dB 2.0dB 4k//–1.0 UM1

IQXF-91M30BU 90.0MHz ±15.0kHz 3rd Overtone ±50.0kHz –25dB 4 1.0dB 3.0dB 4k//–1.0 UM1 x 2

Please Note: Operating Temperature Range (for all filters shown above) is –20 to 70ºC

Please contact the Application Support Department for the value of the coupling capacitor

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CRYSTAL

FILTERS

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FilterFilter

Ct Rt

Dot M ark

Coupling Capacitance

Filter

CtCt

R t - R o

RoRo

R t - R o

S.G L.M

Ro: 50W o r 7 5 W

Attenuation M easurem ent

Filter

CtCt

R t - R o

RoRo

R t - R o

S.G L.M

Ro: 50W o r 7 5 W

Filter

Group Delay M easuring

Equipm ent

Group Delay M easurem ent

Test Circuits

Pin connections

1. Crystal

2. Case & Ground

3. Crystal

123

3 .7 5 (0 .1 4 8 )

7 .3

(0 .2 8 7 )

8.0

(0 .3 1 5 )

12.7 m in

(0 .5 m in )

8 .0

(0 .3 1 5 )

3 .2 (0 .1 2 6 )

0.35

(

0.014)

Outline in mm (inches) - UM1

Pin connections

1. Crystal

2. Case & ground

3. Crystal

123

12.7 m in

(0 .5 m in )

4.88 (0.192)

4.65 (0.183)

11.05

(0 .4 3 5 )

0.45

(

0.012)

11.1 m ax

(0.437 m ax)

10.2 (0.402)

Outline in mm (inches) - HC49/T

11.5 (0.453)

7.0 (0.276)

11.0

(0.433)

4 .0

(0.157)

0.35

(

0.014) 1 .5 (0 .0 6 )

2 .0

(0.079)

7 .4

(0.291)

8 .5

(0.335)

Pin Connections

1 . G ro u n d

2. Input

3 . G ro u n d

4 . O u tp u t

2 .0

(0.079)

Outline in mm (inches) - MF61

CRYSTAL

FILTERS

Surface Mount Monolithic Crystal Filters in a Ceramic Package

Model Nominal

Frequency

Passband

Width

@ –3dB

Attenuation

Bandwidth

Ripple Loss Spurious Guaranteed

Attenuation

Terminating

Impedance

Pole

RC1C2

CFPF-12 21.400MHz ±7.5kHz 18dB ±25.0kHz 1.0dB 2.0dB 10.0dB 70.0dB 1.5kW2.5pF — 2

CFPF-12 21.700MHz ±3.75kHz 18dB ±12.5kHz 1.0dB 2.0dB 18.0dB 70.0dB 850W8.0pF — 2

CFPF-12 21.700MHz ±7.5kHz 18 ±25.0kHz 1.0dB 2.0dB 10.0dB 70.0dB 1.5kW2.5pF — 2

CFPF-13 45.000MHz ±7.5kHz 13 ±25.0kHz 1.0dB 2.0dB 10.0dB 70.0dB 560W6.0pF — 2

CFPF-13 45.000MHz ±15.0kHz 15 ±60.0kHz 1.0dB 3.0dB 3.0dB 70.0dB 1.2kW0.0pF — 2

CFPF-14 45.000MHz ±7.5kHz 25 ±22.0kHz 1.0dB 3.0dB 40.0dB 80.0dB 800W1.7pF 8.0pF 4

CFPF-14 45.000MHz ±10.0kHz 25 ±25.0kHz 1.0dB 3.0dB 40.0dB 80.0dB 800W1.7pF 7.0pF 4

CFPF-14 45.000MHz ±15.0kHz 35 ±50.0kHz 1.0dB 3.0dB 40.0dB 80.0dB 800W1.7pF 6.0pF 4

CFPF-13 73.350MHz ±10.0kHz* 15 ±50.0kHz 1.5dB 5.0dB 15.0dB 70.0dB 600W2.5pF — 2

CFPF-13 90.000MHz ±4.0kHz 8 ±12.5kHz 0.5dB 5.0dB 20.0dB 70.0dB 200W8.0pF — 2

*Please note: Passband Width is @ –1dB

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CRYSTAL

FILTERS

Pad connections

1. GND

2. Input

3. GND

4. GND

5. Output

6 . G N D

Actual Size

7 .0 ± 0 .2

(0.276±0.008)

1.0± 0.15

(0.039±0.006)

1 .0

(0.004)

1 .2

(0.047)

2.54

(0 .1 )

5.0± 0.2

(0.197±0.008)

1 .6

(0.063)

1 .4

(0.055)

5.08

(0 .2 )

2.54

(0 .1 )

Outline in mm (inches) - CFPF-12 (scale 2:1)

Pad connections

1. GND

2. Input

3. GND

4. GND

5. Output

6 . G N D

Actual Size

7 .0 ± 0 .2

(0.276±0.008)

1.4± 0.2

(0.055±0.008)

1 .0

(0.039)

1 .2

(0.047)

2.54

(0 .1 )

1 .6

(0.063)

1 .4

(0.055)

5.08

(0 .2 )

2.54

(0 .1 )

5 .0 ± 0 .2

(0.197±0.008)

Outline in mm (inches) - CFPF-13 (scale 2:1)

Pad connections

1. GND

2. Input

3. Coupling Cap.

4. GND

5. Output

6. Coupling Cap.

Actual Size

7 .0 ± 0 .2

(0.276±0.008)

1.35±0.15

(0.053±0.006)

1.0

(0.039)

1 .2

(0.047)

2.54

(0 .1 )

5.0± 0.2

(0.197±0.008)

1 .6

(0.063)

1 .4

(0.055)

5.08

(0 .2 )

2.54

(0 .1 )

Outline in mm (inches) - CFPF-14 (scale 2:1)

C1 C2* C3

*C 2 is in c irc u it fo r C F P F -1 4 o n ly

Filter

Test Circuit

Custom filter order form

Customer Filter Requirements Fax Form - Please copy form, fill out using BLOCK CAPITALS and fax to C-MAC on +44 (0)1460 72578

x = Minimum Specification Information Required for Filter pricing

Nominal Frequency (FO)x MHz

Passband (Min) x dB Fo±kHz

Stopband (Max) x dB Fo±kHz

Insertion Loss x dB

Ripple (Peak to valley) x dB Fo±kHz

Guaranteed

attenuation

dB From Fo-to Fo-kHz

dB From Fo+toF

o+kHz

Terminating

impedances

Source x WpF ±pF

Load x WpF ±pF

Operating Temperature Range x °C

Holder style x

Spurious

attenuation

dB From Fo-to Fo-kHz

dB From Fo+toF

o+kHz

Input

levels

Test level dBm

Max continous level dBm

Max level before damage dBm

Group delay requirements Fo±(kHz) mSmax

Intermodulation

requirements

Test tone frequencies f1f2MHz

Test tone power level dBm

Third order IM product dBm min

V.S.W.R. requirements Fo±(kHz) dBm min

Environmental

Specification

specification

Vibration (operational)

Vibration (non-operational)

Shock (non-operational)

Additional Notes

Name

Job Title

Company Name

Address

Postcode

Telephone E-mail

Fax http://

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CRYSTAL

FILTERS