Information
High Accuracy, Galvanically Isolated Current Sensor IC
With Small Footprint SOIC8 Package
ACS722
10
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
xLLCTR-40AU PERFORMANCE CHARACTERISTICS: T
A
Range L, valid at T
A
= – 40°C to 150°C, V
CC
= 3.3 V, unless
otherwise specif ied
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Nominal Performance
Current Sensing Range I
PR
0 – 40 A
Sensitivity Sens I
PR
(min) < I
P
< I
PR
(max) – 66 – mV/A
Zero Current Output Voltage V
IOUT(Q)
Unidirectional; I
P
= 0 A –
V
CC
x
0.1
– V
Accuracy Performance
Sensitivity Error E
sens
T
A
= 25°C to 150°C; measured at I
P
= I
PR
(max) –1.5 – 1.5 %
T
A
= –40°C to 25°C; ; measured at I
P
= I
PR
(max) – ±2 – %
Offset Voltage
1
V
OE
I
P
= 0 A; T
A
= 25°C to 150°C –10 – 10 mV
I
P
= 0 A; T
A
= -40°C to 25°C – ±15 – mV
Total Output Error
2
E
TOT
I
P
= I
PR
(max), T
A
= 25°C to 150°C –2 – 2 %
I
P
= I
PR
(max), T
A
= –40°C to 25°C – ±3 – %
Lifetime Drift Characteristics
Sensitivity Error Lifetime Drift E
sens_drift
– ±2 – %
Total Output Error Lifetime
Drift
E
tot_drift
– ±2 – %
1
Offset Voltage does not incorporate any error due to external magnetic fields. See section: Impact of External Magnetic Fields.
2
Percentage of I
P
, with I
P
= I
PR
(max)
xLLCTR-40AB PERFORMANCE CHARACTERISTICS: T
A
Range L, valid at T
A
= – 40°C to 150°C, V
CC
= 3.3 V, unless
otherwise specif ied
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Nominal Performance
Current Sensing Range I
PR
–40 – 40 A
Sensitivity Sens I
PR
(min) < I
P
< I
PR
(max) – 33 – mV/A
Zero Current Output Voltage V
IOUT(Q)
Bidirectional; I
P
= 0 A –
V
CC
x
0.5
– V
Accuracy Performance
Sensitivity Error E
sens
T
A
= 25°C to 150°C; measured at I
P
= I
PR
(max) –1.5 – 1.5 %
T
A
= –40°C to 25°C; ; measured at I
P
= I
PR
(max) – ±2 – %
Offset Voltage
1
V
OE
I
P
= 0 A; T
A
= 25°C to 150°C –10 – 10 mV
I
P
= 0 A; T
A
= -40°C to 25°C – ±15 – mV
Total Output Error
2
E
TOT
I
P
= I
PR
(max), T
A
= 25°C to 150°C –2 – 2 %
I
P
= I
PR
(max), T
A
= –40°C to 25°C – ±3 – %
Lifetime Drift Characteristics
Sensitivity Error Lifetime Drift E
sens_drift
– ±2 – %
Total Output Error Lifetime
Drift
E
tot_drift
– ±2 – %
1
Offset Voltage does not incorporate any error due to external magnetic fields. See section: Impact of External Magnetic Fields.
2
Percentage of I
P
, with I
P
= I
PR
(max)