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LTC1391C

更新时间： 2024-11-24 22:55:51
品牌 Logo 应用领域
凌特 - Linear 复用器
页数 文件大小 规格书
9页 163K
描述
8-Channel Analog Multiplexer with Cascadable Serial Interface

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中文翻译

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LTC1391C 数据手册

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LTC1391  
8-Channel  
Analog Multiplexer with  
Cascadable Serial Interface  
U
FEATURES  
DESCRIPTION  
TheLTC ®1391isahighperformanceCMOS8-to-1analog  
multiplexer. It features a serial digital interface that allows  
several LTC1391s to be daisy-chained together, increas-  
ing the number of MUX channels available using a single  
digital port.  
■
Low RON: 45Ω  
■
Single 2.7V to ±5V Supply Operation  
■
Analog Inputs May Extend to Supply Rails  
Low Charge Injection  
Serial Digital Interface  
Low Leakage: ±5nA Max  
Guaranteed Break-Before-Make  
TTL/CMOS Compatible for All Digital Inputs  
■
■
■
The LTC1391 features a typical RON of 45Ω, a typical  
switch leakage of 50pA and guaranteed break-before-  
make operation. Charge injection is ±10pC maximum. All  
digital inputs are TTL and CMOS compatible when oper-  
ated from single or dual supplies. The inputs can with-  
stand 100mA fault current.  
■
■
■
Cascadable to Allow Additional Channels  
Can Be Used as a Demultiplexer  
■
U
APPLICATIONS  
The LTC1391 is available in 16-pin PDIP, SSOP and  
narrow SO packages. For applications requiring 2-way  
serial data transmission, see the LTC1390 data sheet.  
■
Data Acquisition Systems  
Communication Systems  
Signal Multiplexing/Demultiplexing  
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
On-Resistance vs  
Analog Input Voltage  
3V, 8-Channel 12-Bit ADC  
3V  
300  
OPTIONAL A/D  
INPUT FILTER  
1µF  
0.1µF  
1
2
3
4
8
7
6
5
T
= 25°C  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
A
+
V
V
S0  
S1  
S2  
S3  
S4  
S5  
S6  
S7  
V
REF  
CC  
250  
200  
150  
100  
50  
+
–
+IN  
–IN  
GND  
CLK  
V
V
= 2.7V  
= 0V  
D
–
LTC1285  
V
D
OUT  
D
ANALOG  
INPUTS  
CS/SHDN  
OUT  
LTC1391  
D
IN  
CS  
CLK  
+
–
V
= 5V  
= –5V  
GND  
V
0
DATA IN  
CLK  
–5 –4 –3 –2 –1  
0
1
2
3
4
5
SERIAL INTERFACE  
TO MUX AND ADC  
ANALOG INPUT VOLTAGE (V)  
CS  
1391 TA02  
DATA OUT  
1391 TA01  
1
1234567...9

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