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430 CG01-I

PIEZO FILTERS

INTRODUCTION

For more than two decades, ceramic

filter technology has been instrumental

in the proliferation of solid state

electronics. A view of the future reveals

that even greater expectations will be

placed on piezoelectric material in the

area of new applications and for more

stringent performance criteria in current

products. Traditionally, nearly all low

and high-end AM and FM commercial

radios use ceramic

band-pass filters.

However, applications

are also found in

cordless telephones,

cellular systems,

2-way communications,

and the

television industry.

As a world leader in the development

of piezo ceramic filter technology,

Murata Electronics had been able to

develop specialized ceramic materials

which when combined with an advance

filter design have resulted in a complete

line of practical, inexpensive ceramic

filters for entertainment and communi-

cations applications. In this catalog,

the principle of ceramic filters, the

design of representative test circuits

and specifications concerning various

models are described.

PIEZOELECTRIC THEORY AS

APPLIED TO CERAMIC FILTERS

All ceramic filters derive their basic

frequency selectivity from a mechanical

vibration resulting from a piezoelectric

effect. While a total theoretical analysis

of piezoelectric technology as applied

to ceramic filters is very complex, it can

be shown as the equivalent circuit

illustrated in Fig. 430-1. This equivalent

circuit represents a typical two-terminal

filter, a device which forms the basic

building block for more complex filters.

The resonant frequency of this device

is calculated by the equation:

The anti-resonant frequency is

expressed as:

This filter exhibits the impedance

shown in Fig. 430-2.

Two-terminal filters are typically used

as emitter bypasses and they exhibit

the frequency characteristics shown

in Fig. 430-3.

Three-terminal ceramic filters can be

used as inter-stage coupling devices as

shown in Fig. 430-4. By using our filters

in this manner, increased selectivity,

improved band pass characteristics,

reliability and stability can be obtained

without increasing circuit complexity

or parts count.

By cascading two or more filters as

shown in Figs. 431-5 and 6, Murata

can greatly enhance selectivity.

By controlling the coefficient of

electromechanical coupling between

the filter elements, bandwidth can

“peaked”

or “flattened.” Typical

455kHz response curves are shown

in Figs. 431-7 and 8.

2π

: Parallel Capacitance

: Series Resistance

: Series Inductance

: Series Capacitance

Fig. 430-1

Two-Terminal Type

Equivalent Circuit

Attenuation (dB)

430 440 450 460 470 480

Frequency (kHz)

Fig. 430-3

Typical Attenuation Characteristics

For A 455kHz (Two-Terminal)

Ceramic Filter

Fig. 430-4

Three-Terminal

Filter Used As Inter-Stage

Coupling Device

From

Preceding

Stage

SFU455

To Next

Stage

BFU

455

BFU

455

Impedance (k)

100

0.1

0.01

440 460 480 500 520

Frequency (kHz)

Fig. 430-2

Typical Impedance vs

Frequency Response Curve For

A Two-Terminal Device

455

1 2 3 4 5 6 ... 41 42

Sommario

Pagina 1 - INTRODUCTION

430 CG01-IPIEZO FILTERSINTRODUCTIONFor more than two decades, ceramicfilter technology has been instrumentalin the proliferation of solid stateelectro

Pagina 2

CG01-I 439PIEZO FILTERSMULTI-ELEMENT, RESIN MOLDED,G.D.T. FLAT TYPECFWSY 455kHz6dB Bandwidth 50dB Bandwidth Insertion LossAttenuation atGroup Delay T

Pagina 3

6dB Bandwidth40dB Attenuation atInsertion Loss Group Delay Time Input/OutputPart Number(kHz) min.Bandwidth 455 ± 100kHz(dB) max. sec. max. (kHz) Imped

Pagina 4

Nominal3dB 6dB 50dBSpuriousInsertion G.D.T. Input/OutputPart NumberCenterBandwidth Bandwidth BandwidthResponseLossRippleDeviation ImpedanceFrequency(k

Pagina 5

Center Frequency Bandwidth (Total) Ripple (max.)*Insertion Stop BandGroup Delay (max.)Source__________________________________________________________

Pagina 6 - CFWS 455kHz

PIEZO FILTERSSURFACE MOUNTED CHIP PIEZOELECTRIC CERAMIC FILTERSFOR AM APPLICATIONS SFGCG, SFPC, CFUCG, CFWC 455kHzCG01-I 443CHARACTERISTICS (TYP.)PAD

Pagina 7 - CFUM/CFWM 455kHz

Recovered Audio DistortionPart Number/3dB Bandwidth Output (at 455kHz) withinIC ApplicationCharacteristics(from 544kHz) min. (at 455kHz) max. 455 ± 8k

Pagina 8

Recovered Audio DistortionPart Number/3dB Bandwidth Output (at 455kHz) withinIC ApplicationCharacteristics(from 455kHz) min. (at 455kHz) max. 455 ± 8k

Pagina 9 - MULTI-ELEMENT

PIEZO FILTERSHIGH PERFORMANCE CERAMIC DISCRIMINATORSFOR MOBILE COMMUNICATION EQUIPMENT CDB/CDBC/CDBM 455kHz446 CG01-IDIMENSIONS: mmPLASTIC TAPE DIMENS

Pagina 10 - Y 455kHz

Part Number Center Freq. (MHz) 3dB Bandwidth (kHz) Insertion Loss (dB max.) Terminal Impedance (Ohms)SFE10.7MFP1 10.7 (Nominal) Fn ±5 min. Fn ±35 m

Pagina 11 - Y/CFWMY 455kHz

448 CG01-IPIEZO FILTERSCERAMIC FILTERS FOR AM APPLICATIONSSFU/SFZ/450/455kHzThe following filters were designed to address the needs of standard AM fi

Pagina 12 - SPECIFICATIONS CFUXC 450kHz

Fig. 431-6 Fig. 431-7 Fig. 431-8Cascade Connection Typical Response Curves For Typical Response Curves ForCFR455 A-E Series Ceramic Filters CFR455 F-I

Pagina 13 - SPECIFICATIONS

PIEZO FILTERSCERAMIC FILTERSMHz SERIESCG01-I 449Murata Electronics’ MHz series of ceramic filters are monolithic devices which utilize the energy-trap

Pagina 14 - PLASTIC TAPE DIMENSIONS: mm

Part Number3dB Bandwidth 20dB Bandwidth Ripple Insertion Loss Spurious (9 ~ 12MHz)(kHz) (kHz) max. (dB) max. (dB) max. (dB) min.SFE10.7MA5-A 280 ± 50

Pagina 15 - FEATURES

Part Number3dB Bandwidth 20dB Bandwidth Insertion Loss Spurious (9~12MHz) Ripple w/n 3dB G.D.T. Bandwidth(kHz) (kHz) max. (dB) max. (dB) min. Bandwid

Pagina 16

3dB Bandwidth 20dB BandwidthRipple Insertion Loss Spurious (9 ~ 12MHz)Part Number(kHz) (kHz) max.Within 3dB(dB) max. (dB) min.Bandwidth (dB)WideSFE10.

Pagina 17 - DIMENSIONS: mm

3dB Bandwidth 40dB BandwidthRipple Insertion Loss Spurious AttenuationPart Number(kHz) (kHz) max.within 3dB(dB) max. (9 to 12MHz) (dB) min.Bandwidth

Pagina 18 - SPECIFICATIONS BFU 450/455

Nominal Center 3dB Bandwidth 20dB Bandwidth Insertion LossRipple Spurious Response Withstanding InsulationFrequency (fn) (kHz) min. (kHz) max. (dB) ma

Pagina 19 - SFU/SFZ/450/455kHz

CG01-I 455Item Code Dimensions (mm) NoteAdhered Terminal LengthL13 min.L22.0 max. Pay attention to directivityPitch of Component P 12.7 ± 0.5Pitch of

Pagina 20 - MHz SERIES

Part Nominal Center 3dB Bandwidth Spurious Insertion Loss at Input/OutputNumber Frequency (fn) (MHz)* from fn (kHz) Attenuation min. fn (dB) max. Impe

Pagina 21 - FREQUENCY CHARACTERISTICS

Part Number IC Mfg. IC NumberCDA10.7MG1-A Sony CX-20029/CX-20111CDA10.7MG2-A Sony CX-831CDA10.7MG4-A Rohm BA4234LCDA10.7MG6-A Toshiba TA7640APCDA10.7M

Pagina 22

458 CG01-IPIEZO FILTERSCERAMIC DISCRIMINATORSFOR FM DEMODULATION RECEIVERSCDACV 10.7MHzLEADED DIMENSIONS: mm TYPICAL CIRCUITCDA TYPESURFACE MOUNT DIME

Pagina 23

432 CG01-IPIEZO FILTERSINTRODUCTIONCERAMIC FILTERTERMINOLOGYAlthough the previous section haspresented a concise discussion ofpiezoelectric theory as

Pagina 24

CG01-I 459PIEZO FILTERSCERAMIC FILTERSHIGHLY ACCURATE TV/VCR TYPE SFSH 4.5 – 6.5MHzThe SFSH lines of ceramic filters are high quality devicesdesigned

Pagina 25

Part NumberNominal Center Attenuation 20dB Attenuation Spurious ResponseFrequency (fn) at fn (dB) min. Bandwidth (kHz) min. (0 to fn) (dB) max.TPS3.

Pagina 26

CG01-I 461PIEZO FILTERSCERAMIC DISCRIMINATORSFOR QUADRATURE DETECTION CDA MC/ME 4.5 – 6.5MHzThe CDA MC/ME lines of ceramic discriminators are ICdepend

Pagina 27

462 CG01-IPIEZO FILTERSSAW FILTERS FOR AUDIO VISUAL EQUIPMENTCOLOR TV/VCR SIFSAF SeriesThis series of saw filters is designed for TV/VCR applications.

Pagina 28 - CDA 10.7MHz

CG01-I 463PIEZO FILTERSSAW FILTERS FOR AUDIO VISUAL EQUIPMENTMULTI TV/VCR SIF SAF SeriesThis series of saw filters is designed for TV/VCR applications

Pagina 29 -  

464 CG01-IPIEZO FILTERSSAW FILTERS FOR AUDIO VISUAL EQUIPMENTMULTI TV/VCR/VIF SAF SeriesThis series of saw filters is designed for TV/VCR applications

Pagina 30

CG01-I 465PIEZO FILTERSSAW FILTERSFOR AUDIO VISUAL EQUIPMENTSAF SeriesThis series of saw filters is designed for TV/VCR applications. These filters ar

Pagina 31 - CERAMIC TRAPS

466 CG01-IPIEZO FILTERSSAW FILTERS FOR AUDIO VISUAL EQUIPMENTCOLOR TV VIF/VCR SAF SeriesThis series of saw filters are designed for TV/VCR application

Pagina 32 - CG01-I 461

PIEZO FILTERSSAW FILTERSFOR SET TOP BOX (CATV)SAF SeriesThis series of saw filters is designed for TV/VCR applications. These filters are capable of p

Pagina 33

468 CG01-IPIEZO FILTERSSAW FILTERSFOR SET TOP BOX (CATV)SAF SeriesThis series of saw filters is designed for TV/VCR applications. These filters are ca

Pagina 34 - (fs2) Carrier

CG01-I 433PIEZO FILTERSINTRODUCTIONOn the other hand, if R1and R2areconnected to higher values other than those specified, the insertion loss will inc

Pagina 35 - 2.5 2.5 2.5

Part Number SAF44MTC80ZL SAF44.00MTD220ZL SAF44.00MTE220ZLInsertion Loss(at 44.00 MHz)22.0dB 20.5dB 21.0dB39.75MHZ 35.0 min. — —40.00MHZ — 32.0 min. 3

Pagina 36

470 CG01-IPIEZO FILTERSSAW FILTERS FOR AUDIO VISUAL EQUIPMENTTAPING DIMENSIONS SAF SeriesSPECIFICATIONSPart NumberSAF M80Z-TF/SAF M200Z-TF SAF M80Z

Pagina 37 - COLOR TV VIF/VCR SAF Series

CG01-I 471PIEZO FILTERSHIGH FREQUENCY TRAP FOR TV/VCR APPLICATIONS MKT SeriesMKT is a high frequency trap for television or other similar systems.SPEC

Pagina 38 - 2.52.52.52.5

434 CG01-ICERAMIC FILTERS DO NOT PASS DCIt is important to note in designingcircuits that ceramic filters areincapable of passing DC. As isillustrated

Pagina 39

Attenuation Input/OutputPart NumberNominal Center 6dB Bandwidth 40dB Bandwidth455±100kHzRipple Insertion LossImpedanceFrequency (kHz) (kHz) min. (kHz)

Pagina 40

AttenuationPart NumberNominal Center 6dB Bandwidth 40dB Bandwidth455±100kHzInsertion Loss Input/OutputFrequency (kHz) (kHz) min. (kHz) max.(dB) min.(d

Pagina 41 - TAPING DIMENSIONS SAF Series

Nominal Center 3dB 6dB Ripple 60dBAttenuationSpuriousInsertion Loss Input/OutputPart Number Frequency Bandwidth Bandwidth (dB) Bandwidth(dB) min.Respo

Pagina 42 - PART NUMBER LIST

SPECIFICATIONS CFM/CFJ/CFR/CFS/CFL 455kHz438 CG01-IPIEZO FILTERSMULTI-ELEMENTHIGH PERFORMANCE CFM/CFJ/CFR/CFS/CFL 455kHzThe following lines of filters

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