Datasheet

INA3221

SBOS576A –MAY 2012–REVISED JUNE 2013

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Power Valid Upper Limit Register (Address = 10h, Read/Write)

(1)

BIT D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

NAME SIGN PVU11 PVU10 PVU9 PVU8 PVU7 PVU6 PVU5 PVU4 PVU3 PVU2 PVU1 PVU0 — — —

POR

0 0 1 0 0 1 1 1 0 0 0 1 0 0 0 0

VALUE

(1) Power-on reset value is 2710h (10.000 V)

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 SIGN 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 I

C 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

C bus. The Die ID for the INA3221 is

3220h.

Product Folder Links: INA3221