Fully Integrated, Hall Effect-Based Linear Current Sensor IC

with

ACS712

7

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

–40

25

85

150

–40

25

–20

85

125

After excursion to 20 A

Mean Supply Current versus Ambient Temperature

Sensitivity versus Sensed Current

110.00

108.00

106.00

104.00

102.00

100.00

98.00

96.00

94.00

92.00

90.00

Ip (A)

9.7

9.6

9.5

9.4

9.3

9.2

9.1

-50

-25

0

25

50

75

125

100

150

Supply Current versus Supply Voltage

10.4

10.2

10.0

9.8

9.6

9.4

9.2

9.0

Nonlinearity versus Ambient Temperature

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

–50

0

–25

25

50

125

75

100

150

Mean Total Output Error versus Ambient Temperature

8

6

4

2

0

–2

–4

–6

–8

–50

0

–25

25

50

125

75

100

150

Output Voltage versus Sensed Current

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

–25 –20 –15 –10

–5

0

5

10152025

4.5

4.6

4.8

4.7

4.9

5.0

5.3

5.15.2

5.45.5

–25 –20 –15 –10

–5

0

510

15

20

25

100.8

100.6

100.4

100.2

100.0

99.8

99.6

99.4

99.2

99.0

Sensitivity versus Ambient Temperature

–50

0

–25

25

50

125

75

100

150

0

–0.5

–1.0

–1.5

–2.0

–2.5

–3.0

–3.5

–4.0

–4.5

–5.0

-50

-25

0

25

50

75

125

100

150

Magnetic Offset versus Ambient Temperature

0 A Output Voltage versus Ambient Temperature

2525

2520

2515

2510

2505

2500

2495

2490

2485

-50

-25

0

25

50

75

125

100

150

0 A Output Voltage Current versus Ambient Temperature

0.25

0.20

0.15

0.10

0.05

0

–0.05

–0.10

–0.15

-50

-25

0

25

50

75

125

100

150

Characteristic Performance