Data Sheet

Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with
2.1 kVRMS Isolation and a Low-Resistance Current Conductor
ACS712
7
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
–40
25
85
150
T
A
(°C)
–40
25
–20
85
125
T
A
(°C)
I
P
= 0 A
I
P
= 0 A
V
CC
= 5 V
V
CC
= 5 V
V
CC
= 5 V; I
P
= 0 A,
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
Sens (mV/A)
Ip (A)
T
A
(°C)
T
A
(°C)
Mean I
CC
(mA)
9.7
9.6
9.5
9.4
9.3
9.2
9.1
-50 -25 0 25 50 75 125100 150
Supply Current versus Supply Voltage
10.4
10.2
10.0
9.8
9.6
9.4
9.2
9.0
V
CC
(V)
I
CC
(mA)
Nonlinearity versus Ambient Temperature
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
–50 0–25 25 50
12575 100 150
E
LIN
(%)
T
A
(°C)
Mean Total Output Error versus Ambient Temperature
8
6
4
2
0
–2
–4
–6
–8
–50 0–25 25 50
12575 100 150
E
TOT
(%)
I
P
(A)
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 10 15 20 25
V
IOUT
(V)
4.5 4.6 4.84.7 4.9
5.0 5.35.1 5.2 5.4 5.5
–25 –20 –15 –10 –5 0
5 10 15 20 25
100.8
100.6
100.4
100.2
100.0
99.8
99.6
99.4
99.2
99.0
Sens (mV/A)
T
A
(°C)
Sensitivity versus Ambient Temperature
–50 0–25 25 50
12575 100 150
T
A
(°C)
I
OM
(mA)
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 125100 150
Magnetic Offset versus Ambient Temperature
0 A Output Voltage versus Ambient Temperature
T
A
(°C)
V
IOUT(Q)
(mV)
2525
2520
2515
2510
2505
2500
2495
2490
2485
-50 -25 0 25 50 75 125100 150
0 A Output Voltage Current versus Ambient Temperature
T
A
(°C)
I
OUT(Q)
(A)
0.25
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
-50 -25 0 25 50 75 125100 150
Characteristic Performance
I
P
= 20 A, unless otherwise specified