Data

Clock

CurrentRegister

Two-Wire

Interface

VoltageRegister

V

IN+

ADC

INA220

GND

A0

A1

V

(

V

V

I

Shunt

(40mVmax

for12-bit)

4.3k

1W

W

+3.3Vto+5V

1/4WZener

orshuntreg

HCPL2300

HCPL2300

HCPL2300

4.3kW

4.3kW

4.3kW

4.3kW

SDA

SCL

+5V

1

2

3

4

8

7

6

5

1

2

3

4

8

7

6

5

1

2

3

4

8

7

6

5

35.7kW

13.7kW

24V

Tranzorb

PowerRegister

-

48V

Supply

-

48V

toLoad

V

IN-

0.1 F

m

10 F

m

0.1 F

m

0.1 F

m

0.1 F

m

-

48V

Supply

0.1 F

m

From

Supply

Load

10kW

Data

(SDA)

Clock

(SCL)

´

PowerRegister

CurrentRegister

Two-Wire

Interface

VoltageRegister

V

IN+

ADC

INA220

GND

A0

A1

V

IN-

V

S

SupplyVoltage)

(

V

BUS

(BusVoltageInput)

R

G

10 F

m

0.1 F

m

+3.3Vto

+5V

V

I

OPA333

100W

35.7kW

13.7kW

Shunt

R

SHUNT

5.1V

Zener

24V

Tranzorb

R

L

100W

MOSFETratedto

standoffsupplyvoltage

suchasBSS84for

upto50V

INA220

www.ti.com

SBOS459D – JUNE 2009 – REVISED SEPTEMBER 2010

ADDITIONAL APPLICATION IDEAS

Figure 23, Figure 24, and Figure 25 show the INA220 in additional circuit configurations for current, voltage, and

power monitoring applications.

Figure 23. –48V Telecom Current/Voltage/Power Sense with Isolation

Figure 24. 48V Telecom Current/Voltage/Power Sense

Copyright © 2009–2010, Texas Instruments Incorporated

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Product Folder Link(s): INA220