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LTC1594L

更新时间： 2024-11-26 22:57:35
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
24页 281K
描述
4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters

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中文翻译

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LTC1594L 数据手册

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LTC1594L/LTC1598L  
4- and 8-Channel,  
3V Micropower Sampling  
12-Bit Serial I/O A/D Converters  
U
FEATURES  
DESCRIPTIO  
The LTC®1594L/LTC1598L are 3V micropower, 12-bit  
sampling A/D converters that feature 4- and 8-channel  
multiplexers,respectively.Theytypicallydrawonly160µA  
of supply current when converting and automatically  
power down to a typical supply current of 1nA between  
conversions. The LTC1594L is available in a 16-pin SO  
package and the LTC1598L is packaged in a 24-pin  
SSOP.Bothoperateona3Vsupply.The12-bit,switched-  
capacitor, successive approximation ADCs include a  
sample-and-hold.  
■
12-Bit Resolution on 3V Supply  
■
Low Supply Current: 160µA Typ  
■
Auto Shutdown to 1nA  
■
Guaranteed ±3/4LSB Max DNL  
■
Guaranteed 2.7V Operation  
(5V Versions Available: LTC1594/LTC1598)  
■
Multiplexer: 4-Channel MUX (LTC1594L)  
8-Channel MUX (LTC1598L)  
■
Separate MUX Output and ADC Input Pins  
■
MUX and ADC May Be Controlled Separately  
■
Sampling Rate: 10.5ksps  
On-chip serial ports allow efficient data transfer to a wide  
I/O Compatible with QSPI, SPI and MICROWIRETM, etc.  
Small Package: 16-Pin Narrow SO (LTC1594L)  
■
rangeofmicroprocessorsandmicrocontrollersoverthree  
or four wires. This, coupled with micropower consump-  
tion, makes remote location possible and facilitates trans-  
mitting data through isolation barriers.  
■
24-Pin SSOP (LTC1598L)  
U
APPLICATIO S  
The circuit can be used in ratiometric applications or with  
an external reference. The high impedance analog inputs  
and the ability to operate with reduced spans (to 1.5V full  
scale) allow direct connection to sensors and transducers  
in many applications, eliminating the need for gain stages.  
■
Pen Screen Digitizing  
■
Battery-Operated Systems  
■
Remote Data Acquisition  
■
Isolated Data Acquisition  
■
Battery Monitoring  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
MICROWIRE is a trademark of National Semiconductor Corporation.  
■
Temperature Measurement  
U
TYPICAL APPLICATION  
12µW, 8-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 3V Supply  
OPTIONAL  
ADC FILTER  
Supply Current vs Sample Rate  
3V  
1k  
1µF  
1000  
100  
10  
T
= 25°C  
A
V
V
= 2.7V  
CC  
REF  
CLK  
18  
MUXOUT  
17  
ADCIN  
16  
V
15, 19  
1µF  
= 2.5V  
= 200kHz  
V
REF  
CC  
f
20 CH0  
21 CH1  
22 CH2  
23 CH3  
24 CH4  
SERIAL DATA LINK  
MICROWIRE AND  
SPI COMPATABLE  
10  
6
CSADC  
CSMUX  
CLK  
ANALOG  
INPUTS  
0V TO 3V  
RANGE  
5, 14  
7
12-BIT  
SAMPLING  
ADC  
8-CHANNEL  
MUX  
+
MPU  
D
IN  
1
2
3
CH5  
CH6  
CH7  
11  
D
OUT  
–
12  
13  
NC  
NC  
LTC1598L  
8
COM  
1
GND  
4, 9  
0.1  
1
10  
100  
1594L/98L TA01  
SAMPLE FREQUENCY (kHz)  
1594L/98L TA02  
1
1234567...24

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