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INA209AIPWR

更新时间： 2024-11-19 04:23:07
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High-Side Measurement, Bi-Directional Current/Power Monitor with I2C⑩ Interface

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SBOS403–JUNE 2007  
High-Side Measurement, Bi-Directional Current/Power Monitor  
with I2C™ Interface  
FEATURES  
DESCRIPTION  
•
SENSES BUS VOLTAGES FROM 0V TO +26V  
The INA209 is a high-side current shunt and power  
monitor with an I2C interface. The INA209 monitors  
•
REPORTS CURRENT, VOLTAGE, AND  
POWER; STORES PEAKS  
both shunt drop and shunt bus voltage.  
A
programmable calibration value, combined with an  
internal multiplier, enables direct readouts in  
amperes. An additional multiplying register calculates  
power in watts. The INA209 features two separate,  
•
TRIPLE WATCHDOG LIMITS:  
–
–
–
Lower Warning with Delay  
Upper Over-limit, No Delay  
Fast Analog Critical  
onboard  
watchdog  
capabilities:  
a
warning  
comparator and an over-limit comparator. The  
warning comparator is useful for monitoring lower  
warning limits and incorporates a user-defined delay.  
The over-limit comparator assists with monitoring  
upper limits that could require immediate system  
shutdown.  
•
HIGH ACCURACY: 1% MAX OVER TEMP  
APPLICATIONS  
•
•
•
•
•
•
•
•
SERVERS  
TELECOM EQUIPMENT  
AUTOMOTIVE  
POWER MANAGEMENT  
BATTERY CHARGERS  
WELDING EQUIPMENT  
POWER SUPPLIES  
TEST EQUIPMENT  
VS  
The INA209 also includes an analog-to-digital  
converter (ADC) comparator and a programmable  
digital-to-analog converter (DAC) that combine to  
provide the fastest possible responses to current  
overload conditions.  
The INA209 can be used together with hot swap  
controllers that already use a current sense resistor.  
The INA209 full-scale range can be selected to be  
either within the hot-swap controller sense limits, or  
wide enough to include them.  
VIN+ VIN-  
(Supply Voltage)  
Critical  
DAC +  
The INA209 senses across shunts on buses that can  
vary from 0V to 26V. The device uses a single +3V  
to +5.5V supply, drawing a maximum of 1.5mA of  
supply current. It is specified for operation from  
–25°C to +85°C.  
CMP  
CMP  
Filter  
Critical  
Critical  
DAC -  
Overlimit  
Warning  
Overlimit Register  
Warning Register  
Power Register  
Current Register  
Voltage Register  
´
Alert  
Data  
CLK  
I2  
Interface  
C
ADC  
GND  
Convert  
GPIO  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
I2C is a trademark of NXP Semiconductors.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2007, Texas Instruments Incorporated  
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