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DEVICECHARACTERISTICS
CDCM7005
SCAS793A–JUNE2005–REVISEDJUNE2005
timingrequirements(持续)
overrecommendedrangesofsupplyvoltage,loadandoperatingfreeairtemperature
PARAMETERMINTYPMAXUNIT
t
r
/t
f
Riseandfalltime20%to80%ofVINPPat80MHzto800MHz
(4)
3ns
dutyVCXODutycycleofVCXOclock40%60%
spi/controlrequirements(看Figure14)
f
ctrl_clk
ctrl_clkfrequency20mhz
t
su1
ctrl_datatoctrl_clksetuptime10ns
t
h2
ctrl_datatoctrl_clkholdtime10ns
t
3
ctrl_clkhighduration25ns
t
4
ctrl_clklowduration25ns
t
su5
ctrl_letoctrl_clksetuptime10ns
t
su6
ctrl_clktoctrl_lesetuptime10ns
t
7
ctrl_lepulsewidth20ns
t
r
/t
f
riseandfalltimeofctrl_datactrl_clk,ctrl_lefrom20%to80%ofv
CC
4ns
pd,重置,支撑,ref_selrequirements
t
r
/t
f
riseandfalltimeofthepd,重置,支撑,ref_selsignalfrom20%to80%ofv
CC
4ns
(4)useasquarewaveforlowerfrequencies(<80mhz).
overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYP
(1)
MAXUNIT
整体的
f
VCXO
=245.76mhz,
f
ref_在
=30.72mhz,
I
cc_lvpecl
pfd=240khz,i
CP
=2ma,alloutputs210260ma
arelvpeclanddiv-用-8(加载,看
supplycurrent(i
CC
overfrequencysee
Figure13)
Figure1通过Figure4)
f
VCXO
=245.76mhz,
f
ref_在
=30.72mhz,
I
cc_lvcmos
120150mA
pfd=240khz,i
CP
=2ma,alloutputs
arelvcmosanddiv-用-8(加载,10pf)
f
在
=0mhz,v
CC
=3.6v,av
CC
=3.6v,
I
CCPD
电源-downcurrentv
cc_cp
=3.6v,100300µa
V
I
=0VorV
CC
V
O
=0VorV
CC
–0.8v
±
40µA
高-impedancestateoutputcurrent
I
OZ
forYxoutputs
V
O
=0VorV
CC
±
100µA
voltageoni_ref_cp(externalcurrent12k
Ω
togndatpind8(bga),pin22
V
i_ref_cp
1.21v
pathforaccuratechargepumpcurrent)(qfn)
V
BB
OutputreferencevoltageV
CC
=3v–3.6v;i
BB
=–0.2mav
CC
–1.3v
C
O
OutputcapacitanceforYxV
CC
=3.3v,v
O
=0VorV
CC
2pF
inputcapacitanceatpri_refand
V
I
=0VorV
CC
,v
I
=0VorV
CC
2.7
秒_ref
C
I
pF
inputcapacitanceatctrl_le,
V
I
=0VorV
CC
2
ctrl_时钟,ctrl_数据
LVCMOS
outputfrequency,看
(2)
,
(3)
,Figure6,加载=5pftognd,1k
Ω
toV
CC
,1k
Ω
f
clk
250MHz
和Figure7toGND
V
IK
LVCMOSinputclampvoltageV
CC
=3v,i
I
=–18ma–1.2v
lvcmosinputcurrentforctrl_le,
I
I
V
I
=0VorV
CC
,v
CC
=3.6v
±
5µA
ctrl_clk,ctrl_数据
(1)alltypicalvaluesareatv
CC
=3.3v,温度=25
°
c.
(2)f
clk
canbeupto400mhzinthetypicaloperatingmode(25
°
c/3.3-vv
CC
).thetotalpowerconsumptionlimitof700mwforthebga
packagecanbeviolatedifseverallvcmosoutputsswitchathighfrequency(看Figure3和Figure4).
(3)operatingthelvcmosorlvpecloutputabovethemaximumfrequencywillnotcauseamalfunctiontothedevice,buttheoutput
signalswingmaynolongermeettheoutputspecification.
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