INA700 datasheet(27/43 Pages) TI

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8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

8.1.1 Device Measurement Range and Resolution

The INA700 has a full scale ADC range for current measurements of ±15.728 A. However, the maximum value

that can be measured is limited by the operating junction temperature as shown in Figure 8-1.

Junction Temperature ( C)

-50

-25

100

125

150

13.5

14.5

15.5

Figure 8-1. Maximum ADC Current Reading vs Temperature

The internal die temperature sensor range extends from –256°C to +256°C but is limited by the package to

–40°C to 150°C.

Table 8-1 shows the full scale voltage on shunt, bus, and temperature measurements, along with their

associated step size.

Table 8-1. ADC Full Scale Values

PARAMETER

FULL SCALE VALUE

RESOLUTION

Current

±15.728

480 µA/LSB

Bus voltage

0 V to 40 V

3.125 mV/LSB

Temperature

–40°C to +150°C

125 m°C/LSB

Current, bus voltage, and temperature measurements can be read through the CURRENT, VBUS, and

DIETEMP registers, respectively. The CURRENT and VBUS registers return 16-bit values. The current

measurement is signed to support bidirectional currents; therefore the data value in CURRENT can be positive

or negative. The VBUS register has a full scale range up to 85 V but is limited in functionality by the maximum

common-mode voltage of 40 V. The VBUS register is unsigned and always positive. The output data can be

directly converted into voltage by multiplying the digital value by the LSB size. The digital output in the DIETEMP

value can also be positive or negative.

Furthermore, the device shows the flexibility to report calculated current in Amperes, power in Watts, charge in

Coulombs and energy in Joules as described in Current and Power, Energy and Charge Calculations.

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INA700

SBOSAB4 – MAY 2023

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