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INA3221 Datasheet(PDF) 10 Page - Texas Instruments

Part # INA3221
Description  Triple-Channel, High-Side Measurement, Shunt and Bus Voltage Monitor with I2C??Interface
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

INA3221 Datasheet(HTML) 10 Page - Texas Instruments

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Power
Supply
(0V to 26V)
Load 1
Load 2
Power
Supply
(0V to 26V)
Load 3
Power
Supply
(0V to 26V)
CBYPASS
0.1µF
VS (Supply
Voltage)
CH 1
CH 2
VIN-1
VIN+1
VIN-2
VIN+2
CH 3
VIN-3
VIN+3
I
2C
Interface
SDA
SCL
A0
Critical
Warning
GND
ADC
Shunt
Voltages 1-3
Critical Limit
Alerts 1-3
Bus
Voltages 1-3
Power Valid
Timing Control
Shunt Voltage
Sum Alerts
VS
VPU
10kΩ
VPU
10kΩ
INA3221
SBOS576A – MAY 2012 – REVISED JUNE 2013
www.ti.com
APPLICATION INFORMATION
The INA3221 is a current-shunt and bus voltage monitor that communicates over an I2C- and SMBus-compatible
interface. The device provides digital shunt and bus voltage readings necessary for accurate decision making in
precisely-controlled systems and also monitors multiple rails to ensure compliance voltages are maintained.
Programmable registers offer flexible configuration for measurement precision and continuous versus single-shot
operation. The Register Information section provides details of the INA3221 registers, beginning with Table 1.
See Figure 1 for a register block diagram of the INA3221.
INA3221 TYPICAL APPLICATION
Figure 20 illustrates a typical INA3221 application circuit. Use a 0.1-
μF ceramic capacitor for power-supply
bypassing, placed as close as possible to the supply and ground pins.
Figure 20. Typical Application Diagram
10
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Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: INA3221


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