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LTC1392

更新时间： 2024-02-09 10:12:10
品牌 Logo 应用领域
凌特 - Linear 监控
页数 文件大小 规格书
12页 287K
描述
Micropower Temperature, Power Supply and Differential Voltage Monitor

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中文翻译

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LTC1392 数据手册

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LTC1392  
MicropowerTemperature,  
Power Supply and  
DifferentialVoltageMonitor  
U
DESCRIPTIO  
EATURE  
S
F
The LTC®1392 is a micropower data acquisition system  
designed to measure temperature, on-chip supply voltage  
and a differential voltage. The differential inputs feature  
rail-to-railcommonmodeinputvoltagerange.TheLTC1392  
containsatemperaturesensor,a10-bitA/Dconverterwith  
sample-and-hold, a high accuracy bandgap reference and  
a 3-wire half-duplex serial interface.  
■
■
■
Complete Ambient Temperature Sensor Onboard  
System Power Supply Monitor  
10-Bit Resolution Rail-to-Rail Common-Mode  
Differential Voltage Input  
Available in 8-Pin SO and PDIP  
0.2µA Supply Current When Idle  
700µA Supply Current When Sampling at  
Maximum Rate  
Single Supply Voltage: 4.5V to 6V  
3-Wire Half-Duplex Serial I/O  
Communicates with Most MPU Serial Ports and All  
■
■
■
The LTC1392 can be programmed to measure ambient  
temperature, power supply voltage and an external volt-  
age at the differential input pins, that can also be used for  
current measurement using an external sense resistor.  
When measuring temperature, the output code of the A/D  
converter is linearly proportional to the temperature in °C.  
Production trimming achieves ±2°C initial accuracy at  
room temperature and ±4°C over the full –40°C to 85°C  
temperature range.  
■
■
■
MPU Parallel I/O O PoU rts  
PPLICATI  
S
A
■
■
■
■
■
Temperature Measurement  
Power Supply Measurement  
Current Measurement  
Remote Data Acquisition  
Environment Monitoring  
The on-chip serial port allows efficient data transfer to a  
wide range of MPUs over three or four wires. This,  
coupled with low power consumption, makes remote  
location sensing possible and facilitates transmitting  
data through isolation barriers.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
O
TYPICAL APPLICATI  
Output Temperature Error  
Complete Temperature, Supply Voltage and  
Supply Current Monitor  
5
LTC1392C  
GUARANTEED  
4
LIMIT  
1µF  
5V  
3
+
LTC1392I  
GUARANTEED  
LIMIT  
2
1
LTC1392  
TYPICAL  
1
2
3
4
8
7
6
5
0
P1.4  
D
D
V
CC  
IN  
R
SENSE  
MPU  
–1  
–2  
–3  
–4  
–5  
–V  
+V  
OUT  
IN  
IN  
(e.g., 68HC11)  
P1.3  
I
CLK  
CS  
LOAD  
P1.2  
GND  
LTC1392 • TA01  
–40  
0
20  
40  
60  
80 100  
–20  
TEMPERATURE (°C)  
LTC1392 • TA02  
1
1234567...12

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