INA700 datasheet(14/50 Pages) TI

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Figure 7-3. Maximum Shunt Current vs Temperature

CAUTION

The INA700 has a maximum junction of 125°C which must not be exceeded. Operation above 125°C

can result in permanent damage to the device.

The current measurement capability is limited by ADC full scale range of 15.728 A, even though the shunt can

withstand pulse currents greater than 15 A.

In applications with overcurrent transients, the peak amplitude and duration of the overcurrent event is important

to determine the device heating. Figure 7-4 shows the peak pulse current versus pulse duration that the device

can withstand before the maximum junction temperature of 125°C is exceeded. The data shown in this curve

was collected at TA = 25°C, using the INA700 evaluation module.

Figure 7-4. Maximum Pulse Current vs Pulse Duration (Single Event)

7.3.3 Versatile Measurement Capability

While the INA700 operates from a 2.7-V to 5.5-V supply, the device can measure voltage and current on rails as

high as 40 V. The current is measured by sensing the voltage drop across an internal shunt resistor positioned

between the IN+ and IN– pins. The input stage of the INA700 is designed such that the input common-mode

voltage can be higher than the device supply voltage, VS. The supported common-mode voltage range of –0.3

V to +40 V at the input pins is designed for both high-side and low-side current measurements. There are no

special considerations for power-supply sequencing because the common-mode input range and device supply

voltage are independent of each other; therefore, the bus voltage can be present with the supply voltage off, and

vice-versa without damaging the device.

The device also measures the bus supply voltage through the IN– pin and temperature through the integrated

temperature sensor. The differential shunt voltage is measured between the IN+ and IN– pins, while the bus

INA700

SBOSAB4A – MAY 2023 – REVISED SEPTEMBER 2023

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INA700 датащи(PDF) 14 Page - Texas Instruments