5 Device Comparison

Table 5-1. Device Comparison

PRODUCT

GAIN (mV/A)

INA253A1

20

INA253A2

40

INA253A3

75

6 Pin Configuration and Functions

9

10

11

12

16

15

14

13

19

18

17

22

21

20

24

23

DNC

RES

OUT

REF1

IS-

SH+

IN+

IS+

DNC

IS-

NC

IS+

DNC

GND

VS

REF2

IS-

SH-

IN-

IS+

DNC

IS-

NC

IS+

25

26

8

7

6

6

5

4

3

2

1

Figure 6-1. PWA Package 24-Pin TSSOP Top View

Table 6-1. Pin Functions

PIN

I/O

DESCRIPTION

NAME

NO.

DNC

4, 9, 16, 21

—

Do not connect this pin to any potential; leave this pin floating

GND

10

Ground

Device ground connection

IN+

17

Analog input

Positive input to internal amplifier. Connect to SH+ or external filter network.

IN–

8

Analog input

Negative input to internal amplifier. Connect to SH– or external filter network.

IS+

2, 3, 22, 23, 25

Analog input

Positive connection to internal shunt resistor. Connect to supply for high-side sensing or load ground for

low-side sensing.

IS–

5, 6, 19, 20, 26

Analog input

Negative connection to internal shunt resistor. Connect to load for high-side sensing or system ground for

low-side sensing.

NC

1, 24

—

No internal connection. Can be left floating, connected to ground or supply. Connecting to IS+ simplifies

high current connections to the shunt.

OUT

14

Analog output

Current sense amplifier output.

REF1

13

Analog input

Reference voltage 1. Connect to any voltage between 0 V and VS to support bidirectional or

unidirectional operation.

REF2

12

Analog input

Reference voltage 2. Connect to any voltage between 0 V and VS to support bidirectional or

unidirectional operation.

RES

15

—

Reserved pin. Connect to GND.

SH+

18

Analog output

Internal shunt positive sense connection. Connect to IN+ or external filter network.

SH–

7

Analog output

Internal shunt negative sense connection. Connect to IN– or external filter network.

VS

11

Power

Device power supply connection, 2.7 V to 5.5 V.

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INA254

SLOS974 – JUNE 2021

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