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LTC2470_15 PDF预览

LTC2470_15

更新时间: 2024-11-13 01:20:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
22页 383K
描述
Selectable 208sps/833sps, 16-Bit ADCs with 10ppm/C Max Precision Reference

LTC2470_15 数据手册

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LTC2470/LTC2472  
Selectable 208sps/833sps,  
16-Bit ΔΣ ADCs with 10ppm/°C  
Max Precision Reference  
DescripTion  
FeaTures  
TheLTC®2470/LTC2472aresmall,16-bitanalog-to-digital  
n
16-Bit Resolution  
n
Internal, High Accuracy Reference—10ppm/°C (Max)  
Single-Ended (LTC2470) or Differential (LTC2472)  
Selectable 208sps/833sps Output Rate  
1mV Offset Error  
converters with an integrated precision reference and  
a selectable 208sps or 833sps 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 conversions  
withnolatencyformultiplexedapplications.TheLTC2470/  
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  
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n
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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  
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System Monitoring  
n
Environmental Monitoring  
n
Direct Temperature Measurements  
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Instrumentation  
The LTC2470/LTC2472 include a user selectable 208sps  
or 833sps output rate and due to a large oversampling  
ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed  
anti-aliasing requirements.  
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Industrial Process Control  
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Data Acquisition  
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Embedded ADC Upgrades  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
No Latency ∆∑ is a trademark 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  
SCK  
+
IN  
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  
24702fb  
For more information www.linear.com/LTC2470  
1

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具10ppm/oC 最大值精准基准的可选 208sps / 833sps、16 位、I2C