High Accuracy, Hall-Effect-Based, 200 kHz Bandwidth,
Galvanically Isolated Current Sensor IC with 100 µΩ Current Conductor
ACS772
8
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
X050B PERFORMANCE CHARACTERISTICS: T
A
= –40°C to 150°C
[1]
, V
CC
= 5 V, unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ.
[2]
Max. Unit
NOMINAL PERFORMANCE
Current Sensing Range I
PR
–50 – 50 A
Sensitivity Sens I
PR(min)
< I
P
< I
PR(max)
–
40 ×
V
CC
/ 5
– mV/A
Zero Current Output Voltage V
IOUT(Q)
Bidirectional; I
P
= 0 A – V
CC
/ 2 – V
ACCURACY PERFORMANCE
Noise V
N
T
A
= 25°C, C
L
= 1 nF – 20.4 – mV
p-p
T
A
= 25°C, C
L
= 1 nF – 3.4 – mV
RMS
Sensitivity Error E
Sens
Full scale of I
P
, T
A
= 25°C –1 ±0.7 1 %
Full scale of I
P
, T
A
= 25°C to 150°C –1.25 ±0.8 1.25 %
Full scale of I
P
, T
A
= –40°C to 25°C –3.5 ±1.7 3.5 %
Electrical Offset Error
V
OE(TA)
I
P
= 0 A, T
A
= 25°C –8 ±4 8 mV
V
OE(TA)HT
I
P
= 0 A, T
A
= 25°C to 150°C –8 ±4 8 mV
V
OE(TA)LT
I
P
= 0 A, T
A
= –40°C to 25°C –20 ±6 20 mV
Magnetic Offset Error I
ERROM
I
P
= 0 A, T
A
= 25°C, after excursion of I
PR(max)
– 210 250 mA
Total Output Error
E
TOT(HT)
Full scale of I
P
, T
A
= 25°C to 150°C –1.5 ±0.9 1.5 %
E
TOT(LT)
Full scale of I
P
, T
A
= –40°C to 25°C –3.5 ±1.7 3.5 %
LIFETIME ACCURACY CHARACTERISTICS
[3]
Sensitivity Error Including Lifetime
E
Sens(LIFE)(HT)
T
A
= 25°C to 150°C –2.1 ±1.6 2.1 %
E
Sens(LIFE)(LT)
T
A
= –40°C to 25°C –3.5 ±2.5 3.5 %
Total Output Error Including Lifetime
E
TOT(LIFE)(HT)
T
A
= 25°C to 150°C –2.1 ±1.7 2.1 %
E
TOT(LIFE)(LT)
T
A
= –40°C to 25°C –3.5 ±2.6 3.5 %
Electric Offset Error Including Lifetime
E
OFF(LIFE)(HT)
T
A
= 25°C to 150°C –10 ±7 10 mV
E
OFF(LIFE)(LT)
T
A
= –40°C to 25°C –20 ±8.9 20 mV
[1]
All ACS772 devices are production tested and guaranteed to T
A
= 150°C, provided the Maximum Junction Temperature, T
J(MAX)
, is not exceeded. See Absolute Maximum
Ratings and Thermal Application section of this datasheet for more information.
[2]
Typical values are ±3 sigma values.
[3]
Min/max limits are derived from AEC-Q100 Grade 1 testing.