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INA3221AIRGVT Datasheet(PDF) 19 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) 19 Page - Texas Instruments

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INA3221
www.ti.com
SBOS576 – MAY 2012
REGISTER INFORMATION
The INA3221 uses a bank of registers for holding configuration settings, measurement results, minimum and
maximum limits, and status information. Table 1 summarizes the INA3221 registers; refer to Figure 1 for an
illustration of the registers.
Table 1. Summary of Register Set
POINTER
POWER-ON RESET
ADDRESS
(Hex)
REGISTER NAME
DESCRIPTION
BINARY
HEX
TYPE(1)
All-register reset, shunt and bus voltage ADC conversion times and
0
Configuration Register
01110001 00100111
7127
R/W
averaging, operating mode.
1
Channel 1 Shunt Voltage
Averaged shunt voltage value.
00000000 00000000
0000
R
2
Channel 1 Bus Voltage
Averaged bus voltage value.
00000000 00000000
0000
R
3
Channel 2 Shunt Voltage
Averaged shunt voltage value.
00000000 00000000
0000
R
4
Channel 2 Bus Voltage
Averaged bus voltage value.
00000000 00000000
0000
R
5
Channel 3 Shunt Voltage
Averaged shunt voltage value.
00000000 00000000
0000
R
6
Channel 3 Bus Voltage
Averaged bus voltage value.
00000000 00000000
0000
R
Contains limit value to compare each conversion value to
7
Channel 1 Critical Limit
01111111 11111000
7FF8
R/W
determine if the corresponding limit has been exceeded.
Contains limit value to compare to averaged measurement to
8
Channel 1 Warning Limit
01111111 11111000
7FF8
R/W
determine if the corresponding limit has been exceeded.
Contains limit value to compare each conversion value to
9
Channel 2 Critical Limit
01111111 11111000
7FF8
R/W
determine if the corresponding limit has been exceeded.
Contains limit value to compare to averaged measurement to
A
Channel 2 Warning Limit
01111111 11111000
7FF8
R/W
determine if the corresponding limit has been exceeded.
Contains limit value to compare each conversion value to
B
Channel 3 Critical Limit
01111111 11111000
7FF8
R/W
determine if the corresponding limit has been exceeded.
Contains limit value to compare to averaged measurement to
C
Channel 3 Warning Limit
01111111 11111000
7FF8
R/W
determine if the corresponding limit has been exceeded.
Contains the summed value of the each of the selected shunt
D
Shunt Voltage Sum
00000000 00000000
0000
R
voltage conversions.
Contains limit value to compare to the Shunt Voltage Sum register
E
Shunt Voltage Sum Limit
01111111 11111110
7FFE
R/W
to determine if the corresponding limit has been exceeded.
Alert configuration, alert status indication, summation control and
F
Mask/Enable
00000000 00000010
0002
R/W
status.
Contains limit value to compare all bus voltage conversions to
10
Power Valid Upper Limit
00100111 00010000
2710
R/W
determine if the Power Valid level has been reached.
Contains limit value to compare all bus voltage conversions to
11
Power Valid Lower Limit
determine if the any voltage rail has dropped below the Power
00100011 00101000
2328
R/W
Valid range.
FE
Manufacturer ID
Contains unique manufacturer identification number.
01010100 01001001
5449
R
FF
Die ID
Contains unique die identification number.
00110010 00100000
3220
R
(1)
Type: R = read-only, R/W = read/write.
Copyright © 2012, Texas Instruments Incorporated
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Product Folder Link(s): INA3221


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