參數(shù)資料
型號(hào)： LTC2309IUF#TRPBF
廠商： Linear Technology
文件頁數(shù)： 9/26頁
文件大?。?/td> 0K
描述： IC ADC 12BIT SAR 24-QFN
標(biāo)準(zhǔn)包裝： 2,500
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
安裝類型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 24-QFN 裸露焊盤（4x4）
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 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
配用： DC1337A-ND - BOARD SAR ADC LTC2309
LTC2309
2309fd
AppLICAtIOns InFORMAtIOn
atesaNACKsignalindicatingtheconversioncycleis
inprogress.
Continuous Read/Write
Oncetheconversioncycleiscomplete,theLTC2309
canbewrittentoandthenreadfromusingtherepeated
START(Sr)command.Figure10showsacyclewhich
beginswithadatawrite,arepeatedSTART,followed
byareadandconcludedwithaSTOPcommand.After
all16bitsarereadout,aconversionmaybeinitiated
byissuingaSTOPcommand.Thefollowingconver-
sionwillbeperformedusingthenewlyprogrammed
data.
S
CONVERSION
NAP
DATA OUTPUT CONVERSION
CONVERSION
NAP
DATA
OUTPUT
R ACK READ
7-BIT ADDRESS
P
S
R ACK
2309 F09
READ
7-BIT ADDRESS
P
Figure 9. Consecutive Reading with the Same Configuration
Continuous Read
Inapplicationswherethesameinputchannelissampled
eachcycle,conversionscanbecontinuouslyperformed
andreadwithoutawritecycle(seeFigure9).TheDIN
wordremainsunchangedfromthelastvaluewritten
intothedevice.Ifthedevicehasnotbeenwrittento
sincepower-up,theDINworddefaultstoall0s(S/D=
O/S=S0=S1=UNI=SLP=0).Attheendofaread
operation,aSTOPconditionmaybegiventostartanew
conversion.Attheconclusionoftheconversioncycle,
thenextresultmaybereadusingthemethoddescribed
above.Iftheconversioncycleisnotconcludedanda
validaddressselectsthedevice,theLTC2309gener-
S
CONVERSION
NAP
DATA INPUT
ADDRESS
CONVERSION
DATA
OUTPUT
W ACK WRITE
7-BIT ADDRESS
Sr
R ACK
2309 F10
READ
7-BIT ADDRESS
P
Figure 10. Write, Read, START Conversion
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