Texas Instruments ADS7865 Handleiding
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S/H
Comparator
CDAC
Input
MUX
AV
DD
REF
IN
SAR
S/H
Comparator
CDAC
REF
OUT
AGND
SAR
10-BitDAC
2.5VReference
ParallelInterface
CHA0+
CHA0-
CHA1+
CHA1-
BV
DD
DB[11:0]
CS
CLOCK
WR
RD
BUSY
CONVST
BGND
CHB0+
CHB0-
CHB1+
CHB1-
Input
MUX
ADS7865
www.ti.com
SBAS441C–OCTOBER2008–REVISEDAPRIL2012
Dual,12-Bit,3+3or2+2Channel,SimultaneousSampling
Analog-to-DigitalConverter
CheckforSamples:ADS7865
1
FEATURES
DESCRIPTION
TheADS7865isadual,12-bit,2MSPSanalog-to-
2
•SixPseudo-orFourFullyDifferentialInputs
digitalconverter(ADC)withfourfullydifferentialorsix
•SNR:71.7dB,THD:–87dB
pseudo-differentialinputchannelsgroupedintotwo
•ProgrammableChannelSequencer
pairsforhigh-speed,simultaneoussignalacquisition.
Inputstothesample-and-hold(S/H)amplifiersare
•ProgrammableandBufferedInternal2.5V
fullydifferentialandaremaintaineddifferentiallyto
Reference
theinputoftheADC.Thisarchitectureprovides
•FlexiblePower-DownFeatures
excellentcommon-moderejectionof72dBat100kHz,
•VariablePower-SupplyRanges:2.7Vto5.5V
whichisacriticalperformancecharacteristicinnoisy
environments.
•Low-PowerOperation:44mWMaximumat5V
•OperatingTemperatureRange:
TheADS7865ispin-compatiblewiththeADS7862,
butoffersadditionalfeaturessuchasa
–40°Cto+125°C
programmablechannelsequencerandreference
•Pin-CompatibleUpgradefortheADS7862
output,flexiblesupplyvoltage(2.7Vto5.5VforAV
DD
andBV
DD
),apseudo-differentialinputmultiplexerwith
APPLICATIONS
threechannelsperADC,andseveralpower-down
features.
•MotorControl
•Multi-AxisPositioningSystems
TheADS7865isofferedinaTQFP-32package.Itis
specifiedovertheextendedoperatingtemperature
•Three-PhasePowerControl
rangeof–40°Cto+125°C.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2008–2012,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS7865 |
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