INA700 datasheet(19/50 Pages) TI

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A read of the ALERT_DIAG register is used to determine which diagnostic triggered the ALERT pin. This

ALERT pin functions.

• Alert latch enable — In case the ALERT pin is triggered, this function will hold the value of the pin even after

all diagnostic conditions have cleared. A read of the ALERT_DIAG register will reset the status of the ALERT

pin. This function is enabled by setting the ALATCH bit.

• Conversion ready enable — Enables the ALERT pin to assert when an ADC conversion is complete and

output values are ready to be read through the digital interface. This function is enabled by setting the CNVR

bit. The conversion completed events can also be read through the CNVRF bit regardless of the CNVR bit

setting.

• Alert comparison on averaged output — Allows the out-of-range threshold value to be compared to the

averaged data values produced by the ADC. This helps remove noise from the output data when compared

to the out-of-range threshold to avoid false alerts due to noise. However, the diagnostic will be delayed due to

the time needed for averaging. This function is enabled by setting the SLOWALERT bit.

• Alert polarity — Allows the device to invert the active state of the ALERT pin. Note that the ALERT pin is an

open-drain output that must be pulled up by a resistor. The ALERT pin is active-low by default and can be

configured for active high function using the APOL control bit.

Other diagnostic functions that are not reported by the ALERT pin but are available by reading the ALERT_DIAG

• Math overflow — Indicated by the MATHOF bit, reports when an arithmetic operation has caused an internal

• Memory status — Indicated by the MEMSTAT bit, monitors the health of the device non-volatile trim memory.

This bit should always read '1' when the device is operating properly.

• Energy overflow — Indicated by the ENERGYOF bit, reports when the ENERGY register has reached an

overflow state due to data accumulation.

• Charge overflow — Indicated by the CHARGEOF bit, reports when the CHARGE register has reached an

overflow state due to data accumulation.

When the ALERT pin is configured to report the ADC conversion complete event, the ALERT pin becomes

a multipurpose reporting output. Figure 7-10 shows an example where the device reports ADC conversion

complete events while the INA700 device is subject to overcurrent, bus undervoltage, overtemperature and over

power events.

Current

Temperature

Bus Voltage

ALERT

(ALATCH = 0)

(APOL = 0)

(CNVR = 1)

Power

Current Over Limit Threshold

Bus Under Voltage Threshold

Over Temp Threshold

Power Over Limit Threshold

BUV

SET

COL

SET

BUV

CLEAR

COL

BUV

SET

COL

CLEAR

BUV

SET

BUV

SET

- No diag. error -

Conversion Complete

Reported

Figure 7-10. Multi-Alert Configuration

www.ti.com

INA700

SBOSAB4A – MAY 2023 – REVISED SEPTEMBER 2023

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