The latch and transparent modes are represented in Figure 7-8. In Figure 7-8 when VIN drops back below the

VLIMIT threshold for the first time, the LATCH terminal is pulled high. With the LATCH terminal pulled high, the

device is set to latch mode so that the alert output state does not return high when the input signal drops below

the VLIMIT threshold. Only when the LATCH terminal is pulled low does the ALERT terminal return to the default

high level, indicating that the input signal is below the limit threshold. When the input signal drops below the limit

threshold for the second time, the LATCH terminal is already pulled low. The device is set to transparent mode at

this point and the ALERT terminal is pulled back high when the input signal drops below the alert threshold.

LATCH

ALERT

VIN

(VIN+ - VIN-)

VLIMIT

0 V

Figure 7-8. Transparent vs Latch Mode

7.4.2 Disable Mode

The INA300 INA300 device has an ENABLE terminal that allows the device to be placed into an active enabled

state or a low-power disabled state where less than 10 µA is consumed from all terminals. This disable state

allows the device to be used in applications where low current consumption is required to extend battery

life where constant monitoring is not required. The INA300 device requires approximately 20 µs to enter the

low-power state when the ENABLE terminal transitions from high to low, as shown in Table 7-7. To return to the

enabled active state, the INA300 device requires approximately 300 µs to return to normal operation when the

ENABLE terminal transitions from low to high, taking the device out of the low-power state.

Table 7-7. Enable and Disable Mode Settings

ENABLE MODE

ENABLE TERMINAL SETTING

Disable mode

ENABLE = low

Enable mode

ENABLE = high

The internal counter that determines if the necessary consecutive 10-µs window comparison alert conditions are

reached for the 50-µs and 100-µs delay setting is reset when the device is put into a disabled state. When the

device is re-enabled, the counter restarts.

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INA300

SBOS613C – FEBRUARY 2014 – REVISED JUNE 2021

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