ACS755XCB-050 datasheet(7/10 Pages) ALLEGRO

7 / 10 page

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

ACS755050-DS, Rev. 2

Current Sensor: ACS755xCB-050

Deﬁnitions of Dynamic Response Characteristics

Propagation delay (tPROP): The time required for the sensor output to reﬂect a change in the primary current

signal. Propagation delay is attributed to inductive loading within the linear IC package, as well as in the induc-

tive loop formed by the primary conductor geometry. Propagation delay can be considered as a ﬁxed time offset

and may be compensated.

Response time (tRESPONSE): The time interval between a) when the primary current signal reaches 90% of its

ﬁnal value, and b) when the sensor reaches 90% of its output corresponding to the applied current.

Rise time (tr): The time interval between a) when the sensor 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 derive the bandwidth of the

current sensor, in which ƒ(–3 dB) = 0.35 / tr. Both tr and tRESPONSE are detrimentally affected by eddy current

losses observed in the conductive IC ground plane and, to varying degrees, in the ferrous ﬂux concentrator

within the current sensor package.

Primary Current

Transducer Output

I (%)

Propagation Time, t

PROP

Primary Current

Transducer Output

I (%)

Response Time, tRESPONSE

Primary Current

Transducer Output

I (%)

Rise Time, tr

ACS755XCB-050 データシート(PDF) 7 Page - Allegro MicroSystems