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LTC1408IUH PDF预览

LTC1408IUH

更新时间： 2024-11-26 03:11:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 493K
描述
Channel, 14-Bit, 600ksps Simultaneous Sampling ADC with Shutdown

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LTC1408IUH 数据手册

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LTC1408  
6 Channel, 14-Bit, 600ksps  
Simultaneous Sampling ADC  
U
with Shutdown  
FEATURES  
DESCRIPTIO  
The LTC®1408 is a 14-bit, 600ksps ADC with six simulta-  
neously sampled differential inputs. The device draws  
only 5mA from a single 3V supply, and comes in a tiny 32  
pin (5mm × 5mm) QFN package. A SLEEP shutdown  
feature lowers power consumption to 6µW. The combina-  
tion of low power and tiny package makes the LTC1408  
suitable for portable applications.  
■
600ksps ADC with 6 Simultaneously Sampled  
Differential Inputs  
■
100ksps Throughput per Channel  
■
76dB SINAD  
■
Low Power Dissipation: 15mW  
■
3V Single Supply Operation  
■
2.5V Internal Bandgap Reference, Can be Overdriven  
with External Reference  
3-Wire Serial Interface  
The LTC1408 contains six separate differential inputs that  
are sampled simultaneously on the rising edge of the  
CONV signal. These six sampled inputs are then  
converted at a rate of 100ksps per channel.  
■
■
Internal Conversion Triggered by CONV  
■
SLEEP (6µW) Shutdown Mode  
■
NAP (3.3mW) Shutdown Mode  
The 90dB common mode rejection allows users to  
eliminate ground loops and common mode noise by  
measuring signals differentially from the source.  
■
0V to 2.5V Unipolar, or ±1.25V Bipolar Differential  
Input Range  
■
90dB Common Mode Rejection  
■
Tiny 32-Pin (5mm × 5mm) QFN Package  
The device converts 0V to 2.5V unipolar inputs differen-  
tially, or ±1.25V bipolar inputs also differentially,  
depending on the state of the BIP pin. Any analog input  
may swing rail-to-rail as long as the differential input  
range is maintained.  
U
APPLICATIO S  
■
Multiphase Power Measurement  
■
■
■
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.  
Data Acquisition Systems  
Uninterruptable Power Supplies  
, 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.  
The serial interface sends out the six conversion results in  
96 clocks for compatibility with standard serial interfaces.  
W
BLOCK DIAGRA  
–
+
–
+
–
+
–
+
–
+
–
+
10µF  
3V  
25  
CH5  
CH5  
CH4  
CH4  
CH3  
CH3  
CH2  
CH2  
CH1  
CH1  
CH0  
CH0  
V
CC  
V
DD  
21  
20 19 18  
17 16 15  
14 12 11  
13  
10  
9
8
7
6
5
4
24  
14-BIT LATCH 0  
14-BIT LATCH 1  
14-BIT LATCH 2  
14-BIT LATCH 3  
14-BIT LATCH 4  
14-BIT LATCH 5  
OV  
3V  
DD  
–
–
–
–
–
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  
600ksps  
14-BIT ADC  
0.1µF  
OGND  
MUX  
TIMING  
LOGIC  
CONV  
SCK  
30  
32  
31  
2.5V  
REFERENCE  
DGND  
V
GND  
22  
REF  
23  
33  
29  
26  
27  
28  
10µF  
1408 TA01  
BIP  
SEL2 SEL1 SEL0  
1408fa  
1
1234567...20

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