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LTC1598

更新时间： 2024-01-13 11:40:05
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
12页 138K
描述
8-Channel, Micropower Sampling 12-Bit Serial I/O A/D Converter

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LTC1598 数据手册

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Fina l Ele c tric a l Sp e c ific a tio ns  
LTC1598  
8-Cha nne l, Mic ro p o we r  
Sa m p ling 12-Bit Se ria l  
I/ O A/ D Co nve rte r  
Aug ust 1996  
U
FEATURES  
DESCRIPTION  
12-Bit Resolution  
Auto Shutdown to 1nA  
Low Supply Current: 320µA Typ  
Guaranteed ±3/4LSB Max DNL  
Single Supply 5V Operation  
8-Channel Multiplexer  
Separate MUX Output and ADC Input Pins  
MUX and ADC May Be Controlled Separately  
The LTC®1598 is an 8-channel, 5V micropower, 12-bit  
sampling A/D converter. It typically draws only 320µA  
of supply current when converting and automatically  
powers down to typically 1nA between conversions. The  
LTC1598 is available in a 24-pin SSOP package and  
operates on a 5V supply. The 12-bit, switched-capacitor,  
successive approximation ADC includes an 8-channel  
MUX and a sample-and-hold.  
■
■
■
■
■
■
■
■
■
Sampling Rate: 16.8ksps  
I/O Compatible with SPI, MICROWIRE , etc.  
24-Pin SSOP Package  
On-chip serial ports allow efficient data transfer to a wide  
rangeofmicroprocessors andmicrocontrollers overthree  
or four wires. This, coupled with micropower consump-  
tion, makes remote location possible and facilitates trans-  
mitting data through isolation barriers.  
TM  
■
■
U
APPLICATIONS  
■
Pen Screen Digitizing  
Battery-Operated Systems  
Remote Data Acquisition  
Isolated Data Acquisition  
Battery Monitoring  
Temperature Measurement  
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.  
■
■
■
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
MICROWIRE is a trademark of National Semiconductor Corporation.  
U
TYPICAL APPLICATION  
Supply Current vs Sample Rate  
24µW, 8-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 5V Supply  
1000  
100  
10  
OPTIONAL  
ADC FILTER  
T
= 25°C  
= 5V  
= 5V  
A
V
CC  
5V  
V
1k  
REF  
CLK  
1µF  
f
= 320kHz  
18  
17  
16  
V
15, 19  
1µF  
V
MUXOUT  
ADCIN  
REF  
CC  
20 CH0  
21 CH1  
22 CH2  
23 CH3  
24 CH4  
SERIAL DATA LINK  
MICROWIRE AND  
SPI COMPATABLE  
10  
6
CS ADC  
CS MUX  
CLK  
ANALOG  
INPUTS  
0V TO 5V  
RANGE  
5, 14  
7
12-BIT  
SAMPLING  
ADC  
8-CHANNEL  
MUX  
+
MPU  
D
IN  
1
2
3
CH5  
CH6  
CH7  
11  
D
OUT  
–
1
0.1  
1
10  
100  
12  
13  
SAMPLE FREQUENCY (kHz)  
NC  
NC  
1598 TA02  
8
COM  
GND  
4, 9  
LTC1598 • TA01  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofits circuits as describedhereinwillnotinfringeonexistingpatentrights.  
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