Texas Instruments ADS7887 Handleiding
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SCLK
+IN
VDD
CDAC
SAR
COMPARATOR
OUTPUT
LATCHES
AND
3−STATE
DRIVERS
CONVERSION
AND
CONTROL
LOGIC
SDO
ADS7887/ADS7888
CS
Copyright © 2016,Texas Instruments Incorporated
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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
ADS7887
,
ADS7888
SLAS468A–JUNE2005–REVISEDAUGUST2016
ADS788x10-Bit,8-Bit,1.25-MSPS,Micro-Power,
MiniatureSARAnalog-to-DigitalConverters
1
1Features
1
•1.25-MHzSampleRateSerialDevice
•10-BitResolution(ADS7887)
•8-BitResolution(ADS7888)
•ZeroLatency
•25-MHzSerialInterface
•SupplyRange:2.35Vto5.25V
•TypicalPowerDissipationat1.25MSPS:
–3.8mWat3-VV
DD
–8mwat5-VV
DD
•±0.35LSBINL,DNL(ADS7887)
•±0.15LSBINL,±0.1LSBDNL(ADS7888)
•61dBSINAD,–84dBTHD(ADS7887)
•49.5dBSINAD,–67.5dBTHD(ADS7888)
•UnipolarInputRange:0VtoV
DD
•Power-DownCurrent:1µA
•WideInputBandwidth:15MHzat3dB
•6-PinSOT23andSC70Packages
2Applications
•BaseBandConvertersinRadioCommunication
•MotorCurrentandBusVoltageSensorsinDigital
Drives
•OpticalNetworking(DWDM,MEMS-Based
Switching)
•OpticalSensors
•Battery-PoweredSystems
•MedicalInstrumentations
•High-SpeedDataAcquisitionSystems
•High-SpeedClosed-LoopSystems
3Description
TheADS7887deviceisa10-bit,1.25-MSPS,analog-
to-digitalconverter(ADC),andtheADS7888device
isa8-bit,1.25-MSPSADC.Thesedevicesincludea
capacitor-basedSARA/Dconverterwithinherent
sampleandhold.Theserialinterfaceineachdevice
iscontrolledbytheCSandSCLKsignalsforglueless
connectionswithmicroprocessorsandDSPs.The
inputsignalissampledwiththefallingedgeofCS,
andSCLKisusedforconversionandserialdata
output.
Thedevicesoperatefromawidesupplyrangefrom
2.35Vto5.25V.Thelowpowerconsumptionofthe
devicesmakethemsuitableforbattery-powered
applications.Thedevicesalsoincludeapower-
saving,power-downfeatureforwhenthedevicesare
operatedatlowerconversionspeeds.
Thehighlevelofthedigitalinputtothedeviceisnot
limitedtodeviceV
DD
.Thismeansthedigitalinputcan
goashighas5.25Vwhendevicesupplyis2.35V.
Thisfeatureisusefulwhendigitalsignalsarecoming
fromothercircuitwithdifferentsupplylevels.Alsothis
relaxesrestrictiononpower-upsequencing.
TheADS7887andADS7888areavailablein6-pin
SOT-23andSC70packagesandarespecifiedfor
operationfrom–40°Cto125°C.
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(NOM)
ADS7887
ADS7888
SOT-23(6)2.90mm×1.60mm
SC70(6)2.00mm×1.25mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
FunctionalBlockDiagram
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS7887 |
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