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LTC2472IMSTRPBF

更新时间： 2024-09-24 05:43:47
品牌 Logo 应用领域
凌特 - Linear 监控
页数 文件大小 规格书
20页 307K
描述
System Monitoring

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中文翻译

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LTC2472IMSTRPBF 数据手册

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LTC2470/LTC2472  
Selectable 250sps/1ksps,  
16-Bit ΔΣ ADCs with 10ppm/°C  
Max Precision Reference  
DESCRIPTION  
FEATURES  
TheLTC®2470/LTC2472aresmall,16-bitanalog-to-digital  
n
16-Bit Resolution, No Missing Codes  
n
Internal, High Accuracy Reference—10ppm/°C (Max)  
Single-Ended (LTC2470) or Differential (LTC2472)  
Selectable 250sps/1ksps Output Rate  
1mV Offset Error  
converters with an integrated precision reference and  
a selectable 250sps or 1ksps output rate. They use a  
single 2.7V to 5.5V supply and communicate through a  
SPI Interface. The LTC2470 is single-ended with a 0V to  
VREF input range and the LTC2472 is differential with a  
VREF input range. Both ADC’s include a 1.25V integrated  
referencewith2ppm/°Cdriftperformanceand0.1%initial  
accuracy. The converters are available in a 12-pin DFN  
3mm × 3mm package or an MSOP-12 package. They  
include an integrated oscillator and perform conver-  
sions with no latency for multiplexed applications. The  
LTC2470/LTC2472 include a proprietary input sampling  
scheme that reduces the average input current several  
orders of magnitude when compared to conventional  
delta sigma converters.  
n
n
n
n
n
0.01% Gain Error  
Single Conversion Settling Time for Multiplexed  
Applications  
Single-Cycle Operation with Auto Shutdown  
3.5mA (Typ) Supply Current  
2μA (Max) Sleep Current  
Internal Oscillator—No External Components  
Required  
SPI Interface  
Small 12-Lead, 3mm × 3mm DFN and MSOP  
Packages  
n
n
n
n
n
n
Following a single conversion, the LTC2470/LTC2472  
automatically power down the converter and can also be  
configured to power down the reference. When both the  
ADC and reference are powered down, the supply current  
is reduced to 200nA.  
APPLICATIONS  
n
System Monitoring  
n
Environmental Monitoring  
n
Direct Temperature Measurements  
n
Instrumentation  
The LTC2470/LTC2472 include a user selectable 250sps  
or 1ksps output rate and due to a large oversampling  
ratio (8,192 at 250sps and 2,048 at 1ksps) have relaxed  
anti-aliasing requirements.  
n
Industrial Process Control  
n
Data Acquisition  
n
Embedded ADC Upgrades  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 6208279, 6411242, 7088280, 7164378.  
TYPICAL APPLICATION  
VREF vs Temperature  
1.2520  
2.7V TO 5.5V  
1.2515  
1.2510  
1.2505  
1.2500  
1.2495  
1.2490  
1.2485  
1.2480  
0.1μF  
0.1μF  
COMP  
0.1μF  
10μF  
0.1μF  
10k  
REFOUT  
V
CC  
+
–
IN  
SCK  
10k  
10k  
SPI  
INTERFACE  
LTC2472  
SDO  
IN  
CS  
0.1μF  
–
REF  
GND  
R
24702 TA01a  
–50 –30 –10 10  
30  
50  
70  
90  
TEMPERATURE (°C)  
24702 TA01b  
24702f  
1
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