CRYSTAL FILTERS - Section Contents Specifying Crystal Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 CRYSTAL FILTERS Standard Crystal Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 127 Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530 SPECIFYING CRYSTAL FILTERS Passband (BW1) A typical Crystal Filter specification reads like this: n 45.0MHz 7.5kHz 15kHz 3 2 90 3k 20 UM1 Centre Frequency, f0 Stopband (BW2) n Passband Stopband (dB) The range of frequencies attenuated greater than a specified minimum level of attenuation, typically 40dB or 60dB. Insertion Loss Insertion Loss (dB) n Ripple Guaranteed Attenuation Terminating Impedances The loss at centre frequency or at the maximum transmission level normally expressed in dB as a result of inserting the filter into the circuit Ripple n 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. The amplitude difference in dB between the maximum passband peak and the minimum passband valley. Both peak and valley are defined by a surrounding change in slope, i.e. The sign of the amplitude response. Guaranteed Attenuation n Centre Frequency (f0) n The range of frequencies attenuated less than a specified value, typically 3dB or 6dB. The arithmetic mean of the passband limits or the defined nominal frequency A minimum attenuation in dB by which a specified frequency band either side of F0 must be guaranteed. Source & Load Impedance n Source Impedance: The impedance driving the filter. G R O U P D E L A Y tg m s A T T E N U A T IO N IN d B Attenuation and Group Delay Graph D E L A Y CRYSTAL FILTERS A M P L IT U D E & G R O U P D E L A Y C H E B Y S H E V Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 B E S S E L 128 B U T T E R W O R T H Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530 n Load Impedance: The impedance of the circuit terminating the filter. n The 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, however for a given number of poles phase distortion will increase with selectivity. n Phase linearity is a different parameter and is sensitive to ambiant conditions such as temperature, vibration & termination impedances. Shape Factor n Ratio of bandwidths, normally stopband and passband of filter. Spurious Attenuation n The specified minimum level of attenuation received by all non-harmonic related resonances of each crystal resonator within the filter network. Inband Intermodulation Distortion n Maximum Drive Level n For continuous operation normally specified in dBm. Out of Band Intermodulation Distortion Linear Phase Characteristics n The attenuation, in dB, of 3rd and higher order signal products, inband, relative to the power level of two signals placed within the passband. n The 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 specify this:By directly defining the slope per segment of bandwidth N2 Ndegrees/kHz N1 or by the phase shift derivative with respect to frequency, i.e. Group Delay j 2 - j1 Tg = 360 ( f 2 - f1) The attenuation, in dB, of 3rd and higher order signal 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. where Tg = Group delay in seconds and j1 & j2 are phase shift at frequency f1 & f2 (measured in degrees and Hertz) Filter Characteristics F 0 0 d B B W 2 B W 1 CRYSTAL FILTERS B A N D W ID T H B W 2 S P U R IO U S A T T E N . S H A P E = F A C T O R B A N D W ID T H B W 1 S T O P B A N D A T T E N . R IP P L E B W T T R A N S IT IO N B A N D IN S E R T IO N L O S S Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 129 Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530 Theoretical Characteristics No. of poles Type of filter 4 CHEB. 5 CHEB. 1 S.L.P. BUTTER GAUSS6 BESSEL BA/BP 4 4.5 4.15 5.6 7.1 8.5 6 CHEB. 5 CHEB. 1 S.L.P. BUTTER GAUSS6 BESSEL 2.1 2.3 2.75 3.15 3.4 5.45 No. of poles Type of filter 0.3 x BP 4 CHEB. 5 CHEB. 1 S.L.P. BUTTER GAUSS6 BESSEL CHEB. 5 CHEB. 1 S.L.P. BUTTER GAUSS6 BESSEL 6 0.15 0.50 0.70 0.50 0.90 1.70 0.5 0.1 1.5 0 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) Bandwidth relative group delay variation (%) (theoretical values) 0.6 x BP 0.9 x BP 1 x BP 22.6 22.6 6.4 23.2 3 0 30 24 2.2 18.8 4 0 142 97 112 51 4.5 0 120 116 116 66 9.5 0 150 97 125 51 4.5 0 232 160 210 67 12 0 Value of T at Fo T in seconds/BP in Hz 0.95/BP 0.95/BP 1.03/BP 0.83/BP 0.71/BP 0.66/BP 1.53/BP 1.54BP 1.44/BP 1.24/BP 4.14/BP 0.85/BP B P 3 d B - 6 P o le s 0 A m p litu d e M a g n itu d e 19.4 6.5 5.3 4.7 3 0 18 6 2.2 3.1 4 0 Magnitude shape factors for 10% phase linearity (theoretical values) BU/BP ONDUL. BU dB BA/BU* Notes 0.20 0.5 20 BP: pass band 3 dB 0.40 0.1 11.2 0.68 1.5 6.1 BU: 10% phase 0.45 0 12.5 linearity band 14 7.1 1.75 BA: stop band 60 dB 5 8.5 1.18 1 S L P B E S 2 3 B U T G r o u p d e la y A tte n u a tio n - 6 P o le s A m p litu d e M a g n itu d e 8 6 CRYSTAL FILTERS T im e 4 2 0 1 F re q u e n c y Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 130 2 3 4 F re q u e n c y 5 Americas Tel: +1 919 941 0430 6 7 Fax: +1 919 941 0530 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 IQXF-10M15A 10.7MHz 7.5kHz Fundamental 25.0kHz -18dB 2 1.0dB 2.0dB 1.5k//5 HC49/T -18dB 2 1.0dB 2.0dB 3k//2 IQXF-10M30A 10.7MHz 15.0kHz Fundamental HC49/T 50.0kHz -18dB 2 0.5dB 2.0dB 5k//0 HC49/T IQXF-21M07AU 21.4MHz 3.75kHz IQXF-21M07BU 21.4MHz 3.75kHz Fundamental 18.0kHz -20dB 2 0.5dB 1.5dB 850//6 UM1 Fundamental 14.0kHz -40dB 4 1.0dB 2.5dB 850//5 UM1 x 2 IQXF-21M15AU 21.4MHz IQXF-21M15BU 21.4MHz 7.5kHz Fundamental 25.0kHz -18dB 2 0.5dB 1.5dB 1.5k//2 UM1 7.5kHz Fundamental 25.0kHz -40dB 4 1.0dB 2.5dB 1.5k//2 UM1 x 2 IQXF-21M30AU IQXF-21M30BU 21.4MHz 15.0kHz Fundamental 45.0kHz -15dB 2 0.5dB 1.5dB 3.0k/0.5 UM1 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 CRYSTAL FILTERS Please Note: Operating Temperature Range (for all filters shown above) is -20 to 70C Please contact the Application Support Department for the value of the coupling capacitor Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 131 Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530 Outline in mm (inches) - UM1 Test Circuits 7 .3 (0 .2 8 7 ) 8 .0 (0 .3 1 5 ) D o t M a rk F ilte r 1 2 .7 m in (0 .5 m in ) AE 0 .3 5 (AE 0 .0 1 4 ) R t 3 .7 5 (0 .1 4 8 ) 1 2 3 F ilte r R t C c C t C t 3 .2 (0 .1 2 6 ) 8 .0 (0 .3 1 5 ) P in 1 . C 2 . C 3 . C c o n n e c tio n s ry s ta l a s e & G ro u n d ry s ta l C o u p lin g C a p a c ita n c e Outline in mm (inches) - HC49/T 1 0 .2 (0 .4 0 2 ) R t - R o S .G 1 1 .1 m a x (0 .4 3 7 m a x ) AE 0 .4 5 (AE 0 .0 1 2 ) R o R t - R o L .M C t R o F ilte r C t 1 2 .7 m in (0 .5 m in ) = = 4 .8 8 (0 .1 9 2 ) R o : 5 0 W o r 7 5 W R t - R o L .M C t R o A tte n u a tio n M e a s u r e m e n t 1 2 3 4 .6 5 (0 .1 8 3 ) P in 1 . C 2 . C 3 . C 1 1 .0 5 (0 .4 3 5 ) c o n n e c tio n s ry s ta l a s e & g ro u n d ry s ta l G r o u p D e la y M e a s u r in g E q u ip m e n t Outline in mm (inches) - MF61 1 1 .0 (0 .4 3 3 ) S .G R o 1 1 .5 (0 .4 5 3 ) 4 .0 (0 .1 5 7 ) CRYSTAL FILTERS 2 .0 (0 .0 7 9 ) 1 .5 (0 .0 6 ) 1 4 2 3 2 .0 8 .5 (0 .0 7 9 ) (0 .3 3 5 ) F ilte r C t R o : 5 0 W 7 .0 (0 .2 7 6 ) AE 0 .3 5 (AE 0 .0 1 4 ) R t - R o P in C o n n 1 . G ro u n 2 . In p u t 3 . G ro u n 4 . O u tp u e c tio n s t d o r 7 5 W G r o u p D e la y M e a s u r e m e n t d 7 .4 (0 .2 9 1 ) Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 132 Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530 Surface Mount Monolithic Crystal Filters in a Ceramic Package Model Nominal Frequency Passband Width @ -3dB Attenuation Bandwidth Ripple Loss CFPF-12 21.400MHz 7.5kHz 18dB CFPF-12 21.700MHz 3.75kHz CFPF-12 21.700MHz CFPF-13 45.000MHz CFPF-13 45.000MHz CFPF-14 45.000MHz 7.5kHz 25 22.0kHz 1.0dB 3.0dB CFPF-14 45.000MHz 10.0kHz 25 25.0kHz 1.0dB 3.0dB CFPF-14 45.000MHz 15.0kHz 35 50.0kHz 1.0dB 3.0dB CFPF-13 73.350MHz 10.0kHz* 15 50.0kHz 1.5dB 5.0dB CFPF-13 90.000MHz 4.0kHz 8 12.5kHz 0.5dB 5.0dB Spurious Guaranteed Attenuation 25.0kHz 1.0dB 2.0dB 10.0dB 70.0dB 18dB 12.5kHz 1.0dB 2.0dB 18.0dB 7.5kHz 18 25.0kHz 1.0dB 2.0dB 7.5kHz 13 25.0kHz 1.0dB 2.0dB 15.0kHz 15 60.0kHz 1.0dB 3.0dB Terminating Impedance Pole R C1 C2 1.5kW 2.5pF -- 2 70.0dB 850W 8.0pF -- 2 10.0dB 70.0dB 1.5kW 2.5pF -- 2 10.0dB 70.0dB 560W 6.0pF -- 2 3.0dB 70.0dB 1.2kW 0.0pF -- 2 40.0dB 80.0dB 800W 1.7pF 8.0pF 4 40.0dB 80.0dB 800W 1.7pF 7.0pF 4 40.0dB 80.0dB 800W 1.7pF 6.0pF 4 15.0dB 70.0dB 600W 2.5pF -- 2 20.0dB 70.0dB 200W 8.0pF -- 2 *Please note: Passband Width is @ -1dB Outline in mm (inches) - CFPF-12 (scale 2:1) 5 .0 0 .2 (0 .1 9 7 0 .0 0 8 ) 1 .0 0 .1 5 (0 .0 3 9 0 .0 0 6 ) P a d 1 . G 2 . In 3 . G 4 . G 5 . O 6 . G 1 .0 (0 .0 0 4 ) c o n n e c tio n s N D p u t N D N D u tp u t N D P a d 1 . G 2 . In 3 . G 4 . G 5 . O 6 . G 5 .0 0 .2 (0 .1 9 7 0 .0 0 8 ) 1 .2 (0 .0 4 7 ) 1 .4 (0 .0 5 5 ) 2 .5 4 (0 .1 ) A c tu a l S iz e 7 .0 0 .2 (0 .2 7 6 0 .0 0 8 ) 1 .6 (0 .0 6 3 ) 1 .2 (0 .0 4 7 ) 1 .4 0 .2 (0 .0 5 5 0 .0 0 8 ) 1 .0 (0 .0 3 9 ) 2 .5 4 (0 .1 ) 1 .6 (0 .0 6 3 ) 1 .4 (0 .0 5 5 ) 2 .5 4 (0 .1 ) 5 .0 8 (0 .2 ) 5 .0 8 (0 .2 ) Outline in mm (inches) - CFPF-14 (scale 2:1) Test Circuit A c tu a l S iz e 7 .0 0 .2 (0 .2 7 6 0 .0 0 8 ) P a d c o n n e c tio n s 1 . G N D 2 . In p u t 3 . C o u p lin g C a p . 4 . G N D 1 .3 5 0 .1 5 5 . O u tp u t (0 .0 5 3 0 .0 0 6 ) 6 . C o u p lin g C a p . 1 .6 (0 .0 6 3 ) 5 .0 0 .2 (0 .1 9 7 0 .0 0 8 ) 1 .2 (0 .0 4 7 ) 2 .5 4 (0 .1 ) c o n n e c tio n s N D p u t N D N D u tp u t N D 1 .0 (0 .0 3 9 ) R R F ilte r C 1 C 2 * C 3 1 .4 (0 .0 5 5 ) 2 .5 4 (0 .1 ) * C 2 is in c ir c u it fo r C F P F - 1 4 o n ly 5 .0 8 (0 .2 ) Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 133 Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530 CRYSTAL FILTERS 2 .5 4 (0 .1 ) Outline in mm (inches) - CFPF-13 (scale 2:1) A c tu a l S iz e 7 .0 0 .2 (0 .2 7 6 0 .0 0 8 ) 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 Passband (Min) x dB Fo kHz Stopband (Max) x dB Fo kHz Insertion Loss x Ripple (Peak to valley) MHz dB x Guaranteed attenuation dB dB dB Terminating impedances Source Load Operating Temperature Range Fo From Fo- to Fo - From Fo+ to Fo + kHz kHz x W pF pF x W pF pF x Holder style C x Spurious attenuation Input levels dB From Fo- to Fo - dB From Fo+ to Fo + kHz kHz Test level dBm Max continous level dBm Max level before damage dBm Group delay requirements Intermodulation requirements Test tone frequencies Fo (kHz) mS max f1 f2 MHz Test tone power level dBm Third order IM product dBm min V.S.W.R. requirements Environmental Specification specification kHz Fo (kHz) dBm min Vibration (operational) Vibration (non-operational) Shock (non-operational) Additional Notes Name Job Title Company Name Address CRYSTAL FILTERS Postcode Telephone E-mail Fax http:// Europe Tel: +44 (0)1460 74433 Fax: +44 (0)1460 72578 134 Americas Tel: +1 919 941 0430 Fax: +1 919 941 0530