INA745AIRELR datasheet(32/50 Pages) TI2

32 / 50 page

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 INA745x has a full scale ADC range for current measurements of ±39.32A. However, the maximum value

that can be measured is limited by the operating junction temperature (see Figure 8-1).

Junction Temperature ( C)

-50

-25

100

125

150

175

Figure 8-1. Maximum ADC Current Reading vs Junction Temperature (Typical Characteristic)

Table 8-1 shows the full scale value for shunt, bus, and temperature measurements, along with the associated

step size.

Table 8-1. Register Full Scale Values and Resolution

PARAMETER

ADDRESS

SIZE

FULL SCALE VALUE

RESOLUTION

Current

16 bit, signed

±39.32A

1.2mA/LSB

Bus voltage

16 bit, signed, always positive

0V to 40V

3.125mV/LSB

Die Temperature

12 bit, signed

–40°C to 150°C

125m°C/LSB

Power

24 bit, unsigned

4026.53W

240µW/LSB

Energy

40 bit, unsigned

4222.125MJ

3.840mJ/LSB

Charge

40 bit, unsigned

82.463MC

75µC/LSB

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

temperature range of –40°C to 150°C. Likewise, the bus voltage measurement range extends up to 102.4V but

is limited by silicon to 40V.

Current, bus voltage, temperature, power, energy and charge measurements can be read through the

corresponding address registers. Values are calculated by multiplying the returned value by the corresponding

LSB size.

Signed values are represented in 2's complement format.

INA745A, INA745B

SBOSAC3B – JULY 2023 – REVISED AUGUST 2025

www.ti.com

Submit Document Feedback

Product Folder Links: INA745A INA745B

INA745AIRELR датащи(PDF) 32 Page - Texas Instruments

INA745AIRELR датащи(HTML) 32 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

датащи скачать

ссылки URL