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ACS750xCA-50
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with High Voltage Isolation and a Low-Resistance Current Conductor
Output Voltage versus Sampled Current
Accuracy at 0 A and at Full-Scale Current
Increasing V IOUT (V)
Accuracy
O v e r Temp erature
Accuracy
25°C Only
Average
V IOUT
Accuracy
O v e r Temp erature
Accuracy
25°C Only
I P (min)
–I P (A)
Full Scale
0A
Accuracy
25°C Only
Accuracy
O v e r Temp erature
Decreasing V IOUT (V)
Definitions of Dynamic Response Characteristics
I P (max)
+I P (A)
Propagation delay (t PROP ). The time required for the device
output to reflect a change in the primary current signal. Propaga-
tion delay is attributed to inductive loading within the linear IC
I (%)
90
Primary Current
package, as well as in the inductive loop formed by the primary
conductor geometry. Propagation delay can be considered as a
fixed time offset and may be compensated.
0
I (%)
Transducer Output
Propagation Time, t PROP
Primary Current
t
Response time (t RESPONSE ). The time interval between a) when
the primary current signal reaches 90% of its final value, and b)
when the device reaches 90% of its output corresponding to the
applied current.
90
0
Transducer Output
Response Time, t RESPONSE
t
Rise time (t r ). The time interval between a) when the device
reaches 10% of its full scale value, and b) when it reaches 90%
of its full scale value. The rise time to a step response is used to
I (%)
90
Primary Current
derive the bandwidth of the device, in which ?(–3 dB) = 0.35 / t r .
Both t r and t RESPONSE are detrimentally affected by eddy current
losses observed in the conductive IC ground plane.
10
0
Transducer Output
Rise Time, t r
Allegro MicroSystems, Inc.
115 Northeast Cutoff
t
6
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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