- 您现在的位置：买卖IC网 > PDF目录10311 > LTC2309IF#PBF (Linear Technology)IC ADC 12BIT SAR 20-TSSOP PDF资料下载
参数资料
| 型号： | LTC2309IF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/26页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SAR 20-TSSOP |
| 标准包装： | 74 |
| 位数： | 12 |
| 采样率（每秒）： | 14k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 15mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 8 个单端，单极；8 个单端，双极；4 个差分，单极；4 个差分，双极 |
| 配用： | DC1337A-ND - BOARD SAR ADC LTC2309 |
LTC2309
0
2309fd
AppLICAtIOns InFORMAtIOn
Overview
TheLTC2309isalownoise,8-channel,12-bitsucces-
siveapproximationregister(SAR)A/Dconverterwithan
I2Ccompatibleserialinterface.TheLTC2309includesa
precisioninternalreferenceandaconfigurable8-chan-
nelanaloginputmultiplexer(MUX).TheADCmaybe
configuredtoacceptsingle-endedordifferentialsignals
andcanoperateineitherunipolarorbipolarmode.A
sleepmodeoptionisalsoprovidedtofurtherreduce
powerduringinactiveperiods.
The LTC2309 communicates through a 2-wire I2C
compatibleserialinterface.Conversionsareinitiated
bysignalingaSTOPconditionaftertheparthasbeen
successfullyaddressedforaread/writeoperation.The
devicewillnotacknowledge(NACK)anexternalrequest
untiltheconversionisfinished.Afteraconversionis
finished, the device is ready to accept a read/write
request. Once the LTC2309 is addressed for a read
operation, the device begins outputting the conver-
sionresultunderthecontroloftheserialclock(SCL).
Thereisnolatencyintheconversionresult.Thereare
12bitsofoutputdatafollowedby4trailingzeros.Data
isupdatedonthefallingedgesofSCL,allowingthe
usertoreliablylatchdataontherisingedgeofSCL.A
writeoperationmayfollowthereadoperationbyusing
arepeatSTARToraSTOPconditionmaybegivento
startanewconversion.Byselectingawriteoperation,
theADCcanbeprogrammedwitha6-bitDINword.The
DINwordconfigurestheMUXandprogramsvarious
modesofoperationoftheADC.
During a conversion, the internal 12-bit capacitive
chargeredistributionDACoutputissequencedthrough
asuccessiveapproximationalgorithmbytheSARstart-
ingfromthemostsignificantbit(MSB)totheleast
significantbit(LSB).Thesampledinputissuccessively
comparedwithbinaryweightedchargessuppliedby
thecapacitiveDACusingadifferentialcomparator.At
theendofaconversion,theDACoutputbalancesthe
analoginput.TheSARcontents(a12-bitdataword)
thatrepresentthesampledanaloginputareloadedinto
12outputlatchesthatallowthedatatobeshiftedout
viatheI2Cinterface.
Programming the LTC2309
ThevariousmodesofoperationoftheLTC2309are
programmedbya6-bitDINword.TheSDIinputdata
bitsareloadedontherisingedgeofSCLduringawrite
operation,withtheS/Dbitloadedonthefirstrisingedge
andtheSLPbitonthesixthrisingedge(seeFigure8b
intheI2CInterfacesection).Theinputdatawordis
definedasfollows:
S/D O/S S1 S0 UNI SLP
S/D=SINGLE-ENDED/DIFFERENTIALBIT
O/S=ODD/SIGNBIT
S1=CHANNELSELECTBIT1
S0=CHANNELSELECTBIT0
UNI=UNIPOLAR/BIPOLARBIT
SLP=SLEEPMODEBIT
Analog Input Multiplexer
The analog input MUX is programmed by the S/D,
O/S,S1andS0bitsoftheDINword.Table1liststhe
MUXconfigurationsforallcombinationsofthecon-
figurationbits.Figure1ashowsseveralpossibleMUX
configurationsandFigure1bshowshowtheMUXcan
bereconfiguredfromoneconversiontothenext.
Driving the Analog Inputs
TheanaloginputsoftheLTC2309areeasytodrive.
Eachoftheanaloginputscanbeusedasasingle-ended
inputrelativetotheCOMpin(CH0-COM,CH1-COM,
etc.)orindifferentialinputpairs(CH0andCH1,CH2
andCH3,CH4andCH5,CH6andCH7).Figure2shows
howtodriveCOMforsingle-endedinputsinunipolar
andbipolarmodes.RegardlessoftheMUXconfigura-
tion,the“+”and“–”inputsaresampledatthesame
instant.Anyunwantedsignalthatiscommontoboth
inputswillbereducedbythecommonmoderejection
ofthesample-and-holdcircuit.Theinputsdrawonly
onesmallcurrentspikewhilechargingthesample-and-
holdcapacitorsduringtheacquiremode.Inconversion
相关PDF资料 |
PDF描述 |
|---|---|
| VE-BNJ-IW-B1 | CONVERTER MOD DC/DC 36V 100W |
| VE-BNH-IX-B1 | CONVERTER MOD DC/DC 52V 75W |
| LTC1198-1ACS8#PBF | IC ADC 8BIT 750KHZ SAMPL 8-SOIC |
| VE-BN4-IW-B1 | CONVERTER MOD DC/DC 48V 100W |
| LTC1198-1ACS8 | IC ADC 8BIT 750KHZ SAMPL 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2309IUF#PBF | 功能描述:IC ADC 12BIT SAR 24-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| LTC2309IUF#TRPBF | 功能描述:IC ADC 12BIT SAR 24-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC2312CTS8-12#TRMPBF | 制造商:Linear Technology 功能描述:IC ADC 12BIT 1MSPS TSOT23-8 制造商:Linear Technology 功能描述:ADC, 12BIT, 500KSPS, SPI, TSOT-23-8, Resolution (Bits):12bit, Sampling Rate:500k |
| LTC2312CTS8-12#TRPBF | 制造商:Linear Technology 功能描述:IC ADC 12BIT 1MSPS TSOT23-8 制造商:Linear Technology 功能描述:ADC, 12BIT, 500KSPS, SPI, TSOT-23-8, Resolution (Bits):12bit, Sampling Rate:500k 制造商:Linear Technology 功能描述:ADC, 12BIT, 500KSPS, SPI, TSOT-23-8, Resolution (Bits):12bit, Sampling Rate:500kSPS, Supply Voltage Type:Single, Supply Voltage Min:2.7V, Supply Voltage Max:3.6V, Supply Current:3.4mA, Digital IC Case Style:TSOT-23, No. of Pins:8 , RoHS Compliant: Yes |
| LTC2312CTS8-14#TRMPBF | 制造商:Linear Technology 功能描述:IC ADC 14BIT 1MSPS TSOT23-8 制造商:Linear Technology 功能描述:ADC, 14BIT, 500KSPS, SERIAL, TSOT23-8 制造商:Linear Technology 功能描述:ADC, 14BIT, 500KSPS, SPI, TSOT-23-8, Resolution (Bits):14bit, Sampling Rate:500k 制造商:Linear Technology 功能描述:ADC, 14BIT, 500KSPS, SPI, TSOT-23-8, Resolution (Bits):14bit, Sampling Rate:500kSPS, Supply Voltage Type:Single, Supply Voltage Min:2.7V, Supply Voltage Max:3.6V, Supply Current:3.4mA, Digital IC Case Style:TSOT-23, No. of Pins:8 , RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。