參數(shù)資料
型號(hào)： LTC2309IUF#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 25/26頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT SAR 24-QFN
標(biāo)準(zhǔn)包裝： 91
位數(shù)： 12
采樣率（每秒）： 14k
數(shù)據(jù)接口： I²C，串行
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 15mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-QFN 裸露焊盤(pán)（4x4）
包裝： 管件
輸入數(shù)目和類(lèi)型： 8 個(gè)單端，單極；8 個(gè)單端，雙極；4 個(gè)差分，單極；4 個(gè)差分，雙極
產(chǎn)品目錄頁(yè)面： 1349 (CN2011-ZH PDF)
配用： DC1337A-ND - BOARD SAR ADC LTC2309
LTC2309
2309fd
pIn FunCtIOns
REFCOMP (Pin 1):ReferenceBufferOutput.Bypass
to GND with 10F and 0.1F ceramic capacitors in
parallel.Nominaloutputvoltageis4.096V.Theinternal
referencebufferdrivingthispinisdisabledbyground-
ingVREF,allowingREFCOMPtobeoverdrivenbyan
externalsource.
GND (Pins 2, 8 , 9):Ground.AllGNDpinsmustbe
connectedtoasolidgroundplane.
VDD (Pins 3, 10):5VSupply.TherangeofVDDis4.75V
to5.25V.BypassVDDtoGNDwitha10Fceramicca-
pacitorinparallelwithtwo0.1Fceramiccapacitors,
onelocatedascloseaspossibletoeachpin.
AD0 (Pin 4):ChipAddressControlPin.Thispiniscon-
figuredasathree-state(LOW,HIGH,floating)address
controlbitforthedeviceI2Caddress.SeeTable2for
addressselection.
AD1 (Pin 5): Chip Address Control Pin. This pin is
configured as a three-state (LOW, HIGH, floating)
address control bit for the device I2C address. See
Table2foraddressselection.
SCL (Pin 6):SerialClockPinoftheI2CInterface.The
LTC2309canonlyactasaslaveandtheSCLpinonly
acceptsanexternalserialclock.Dataisshiftedinto
theSDApinontherisingedgesoftheSCLclockand
outputthroughtheSDApinonthefallingedgesofthe
SCLclock.
SDA (Pin 7):BidirectionalSerialDataLineoftheI2C
Interface.Intransmittermode(read),theconversion
resultisoutputattheSDApin,whileinreceivermode
(write),theDINwordisinputattheSDApintocon-
figuretheADC.Thepinishighimpedanceduringthe
datainputmodeandisanopen-drainoutput(requires
anappropriatepull-updevicetoVDD)duringthedata
outputmode.
CH0-CH7 (Pins 11-18):Channel0toChannel7Analog
Inputs.CH0-CH7canbeconfiguredassingle-ended
or differential input channels. See the Analog Input
Multiplexersection.
COM (Pin 19):CommonInput.Thisisthereference
point for all single-ended inputs. It must be free of
noiseandshouldbeconnectedtogroundforunipolar
conversionsandmidwaybetweenGNDandREFCOMP
forbipolarconversions.
VREF (Pin 20):2.5VReferenceOutput.BypasstoGND
withaminimum2.2Fceramiccapacitor.Theinternal
referencemaybeoverdrivenbyanexternal2.5Vrefer-
enceatthispin.
(TSSOP)
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