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LTC2351-14 PDF预览

LTC2351-14

更新时间： 2023-12-20 18:44:22
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 238K
描述
具停机功能的 6 通道、14 位、1.5Msps 同时采样 ADC

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中文翻译

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LTC2351-14 数据手册

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LTC2351-14  
6-Channel, 14-Bit, 1.5Msps  
Simultaneous Sampling ADC  
with Shutdown  
FEATURES  
DESCRIPTION  
TheLTC®2351-14isa14-bit, 1.5MspsADCwithsixsimul-  
taneously sampled differential inputs. The device draws  
only 5.5mA from a single 3V supply, and comes in a tiny  
32-pin (5mm × 5mm) QFN package. A sleep shutdown  
mode further reduces power consumption to 12μW. The  
combination of low power and tiny package makes the  
LTC2351-14 suitable for portable applications.  
n
1.5Msps ADC with Six Simultaneously Sampled  
Differential Inputs  
n
250ksps Throughput per Channel  
n
75dB SINAD  
n
Low Power Dissipation: 16.5mW  
n
3V Single Supply Operation  
n
2.5V Internal Bandgap Reference, Can Be Overdriven  
with External Reference  
The LTC2351-14 contains six separate differential inputs  
that are sampled simultaneously on the rising edge of the  
CONVsignal. Thesesixsampledinputsarethenconverted  
at a rate of 250ksps per channel.  
n
3-Wire SPI-Compatible Serial Interface  
n
Internal Conversion Triggered by CONV  
n
Sleep (12μW) Shutdown Mode  
NAP (4.5mW) Shutdown Mode  
n
The83dBcommonmoderejectionallowsuserstoeliminate  
ground loops and common mode noise by measuring  
signals differentially from the source.  
n
0V to 2.5V Unipolar, or 1.25V Bipolar Differential  
Input Range  
83dB Common Mode Rejection  
Tiny 32-Pin (5mm × 5mm) QFN Package  
n
n
Thedeviceconverts0Vto2.5Vunipolarinputsdifferentially,  
or 1.25Vbipolarinputsalsodifferentially,dependingonthe  
stateoftheBIPpin.Anyanaloginputmayswingrail-to-rail  
as long as the differential input range is maintained.  
APPLICATIONS  
n
Multiphase Power Measurement  
n
Multiphase Motor Control  
The conversion sequence can be abbreviated to convert  
fewer than six channels, depending on the logic state of  
the SEL2, SEL1 and SEL0 inputs.  
n
Data Acquisition Systems  
Uninterruptable Power Supplies  
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 6084440, 6522187.  
Theserialinterfacesendsoutthesixconversionresultsin96  
clocks for compatibility with standard serial interfaces.  
BLOCK DIAGRAM  
10μF  
3V  
25  
–
+
–
+
–
+
–
+
–
+
–
+
CH5  
CH5  
CH4  
CH4  
CH3  
CH3  
CH2  
CH2  
10  
CH1  
CH1  
CH0  
CH0  
V
CC  
V
DD  
21  
20 19  
18  
17 16 15  
14 12 11  
13  
9
8
7
6
5
4
24  
OV  
3V  
DD  
14-BIT LATCH 0  
14-BIT LATCH 1  
14-BIT LATCH 2  
14-BIT LATCH 3  
14-BIT LATCH 4  
14-BIT LATCH 5  
–
–
–
–
–
3
1
2
–
THREE-  
STATE  
SERIAL  
OUTPUT  
PORT  
S AND H  
S AND H  
S AND H  
S AND H  
S AND H  
S AND H  
SD0  
1.5Msps  
14-BIT ADC  
0.1μF  
OGND  
MUX  
CONV  
SCK  
TIMING  
LOGIC  
30  
32  
31  
2.5V  
REFERENCE  
DGND  
33  
22  
23  
29  
BIP  
26  
27  
28  
235114 TA01  
10μF  
GND  
V
REF  
SEL2 SEL1 SEL0  
235114fb  
1
1234567...20

中文翻译

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