±0.2 V to +26 V

Load

IN+

IN±

2.7 V to 5.5 V

IN+

IN±

2.7 V to 5.5 V

10 k:

VOUT

ALERT

ALERT

10 k:

CMPIN

CMPIN

VOUT

G = 20, 50,

100, 200

G = 20, 50,

100, 200

INA381-Q1

INA381-Q1

5 V

5 V

R1

R2

R3

R4

CMPREF

CMPREF

VS+

VS+

+

±

+

±

+

±

+

±

RESET

RESET

25

INA381-Q1

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SLYS041 – MARCH 2020

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8.2 Typical Applications

8.2.1 Bidirectional Window Comparator

Figure 50. Bidirectional Window Comparator

8.2.1.1 Design Requirements

Table 6 lists the parameters for a design example of a high-side INA381-Q1 measuring in the forward direction,

and one low-side INA381-Q1 measuring in the reverse direction. This example designs for maximum accuracy

and also uses the alert function of both devices.

Table 6. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

12 mΩ

Power-supply voltage

5 V

Common-mode voltage

20 V

Maximum sense current

20 A

Small-signal bandwidth

> 120 kHz

Alert current threshold

19 A