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INA3221AIRGVT Datasheet(PDF) 28 Page - Texas Instruments

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Part # INA3221AIRGVT
Description  Triple-Channel, High-Side Measurement, Shunt and Bus Voltage Monitor
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

INA3221AIRGVT Datasheet(HTML) 28 Page - Texas Instruments

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INA3221
SBOS576 – MAY 2012
www.ti.com
BIT
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
POR
0
0
1
0
0
1
1
1
0
0
0
1
0
0
0
0
VALUE
This register contains the value used to determine if the Power Valid conditions are met. The Power Valid
condition is reached when all bus voltage channels exceed the value set in this limit register. When the Power
Valid condition is met, the Power Valid Alert pin asserts high to indicate that the INA3221 has confirmed all bus
voltage channels are above the Power Valid Upper Limit value. In order for the Power Valid conditions to be
monitored, the bus measurements must be enabled through one of the corresponding MODE settings set in the
Configuration Register. The Power Valid Upper Limit LSB value is 8 mV.
Power Valid Lower Limit Register (Address = 11h, Read/Write)(1)
BIT
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
NAME
PVL12
PVL11
PVL10
PVL9
PVL8
PVL7
PVL6
PVL5
PVL4
PVL3
PVL2
PVL1
PVL0
POR
0
0
1
0
0
0
1
1
0
0
1
0
1
0
0
0
VALUE
(1)
Power-on reset value is 2328h (9.000 V)
This register contains the value used to determine if any of the bus voltage channels drops below the Power
Valid Lower Limit when the Power Valid conditions are met. This limit contains the value used to compare all bus
channel readings to ensure that all channels remain above the Power Valid Lower Limit, thus ensuring the Power
Valid condition is maintained. If any bus voltage channel drops below the Power Valid Lower Limit, the Power
Valid Alert pin is pulled low to indicate that the INA3221 detects a bus voltage reading below the Power Valid
Lower Limit. In order for the Power Valid condition to be monitored, the bus measurements must be enabled
through one of the corresponding MODE settings set in the Configuration Register. The Power Valid Lower Limit
LSB value is 8 mV.
Manufacturer ID Register (Address = FEh, Read)
BIT
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
NAME
0
1
0
1
0
1
0
0
0
1
0
0
1
0
0
1
This register contains a factory-programmable identification value that identifies this device as being
manufactured by Texas Instruments. This register distinguishes this device from other devices that are on the
same I2C bus. The contents of this register are 5449h, or TI in Ascii.
Die ID Register (Address = FFh, Read)
BIT
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
NAME
0
0
1
1
0
0
1
0
0
0
1
0
0
0
0
0
This register contains a factory-programmable identification value that identifies this device as an INA3221. This
register distinguishes this device from other devices that are on the same I2C bus. The Die ID for the INA3221 is
3220h.
28
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Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): INA3221


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