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ACS710
120 kHz Bandwidth, High Voltage Isolation
Current Sensor with Integrated Overcurrent Detection
PERFORMANCE CHARACTERISTICS (continued) , T A Range K, valid at T A = – 40°C to 125°C, V CC = 5 V, unless otherwise specified
X 25CB CHARACTERISTICS
Optimized Accuracy Range 1
Linear Sensing Range
Noise 2
I POA
I R
V NOISE(rms) T A = 25°C, Sens = 28 mV/A, C f = 0, C LOAD = 4.7 nF, R LOAD open
I P = 25 A, T A = 25°C
–25
–75
–
–
–
–
1
28
25
75
–
–
A
A
mV
mV/A
Sensitivity 3
Electrical Offset Voltage
Variation Relative to
V OUT(QBI)4
Total Output Error 5
Sens
V OE
E TOT
I P = 25 A, T A = 25°C to 125°C
I P = 25 A, T A = – 40°C to 25°C
I P = 0 A, T A = 25°C
I P = 0 A, T A = 25°C to 125°C
I P = 0 A, T A = – 40°C to 25°C
Over full scale of I POA , I P applied for 5 ms, T A = 25°C to 125°C
Over full scale of I POA , I P applied for 5 ms, T A = – 40°C to 25°C
–
–
–
–
–
–
–
27.9
28.5
±3
±12
±18
±2.9
±5.2
–
–
–
–
–
–
–
mV/A
mV/A
mV
mV
mV
%
%
1 Although the device is accurate over the entire linear range, the device is programmed for maximum accuracy over the range defined by I POA .
The reason for this is that in many applications, such as motor control, the start-up current of the motor is approximately three times higher than the
running current.
2 V pk-pk noise (6 sigma noise) is equal to 6 × V NOISE(rms) . Lower noise levels than this can be achieved by using C f for applications requiring narrower
bandwidth. See Characteristic Performance page for graphs of noise versus C f and bandwidth versus C f .
3 This parameter can drift by as much as 2.4% over the lifetime of this product.
4 This parameter can drift by as much as 13 mV over the lifetime of this product.
5 This parameter can drift by as much as 2.5% over the lifetime of this product.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
9
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