ACS709 Allegro MicroSystems, Inc., ACS709 Datasheet - Page 15

• Manufacturer Part Number: ACS709
• Description: High Bandwidth, Fast Fault Response Current Sensor Ic In Thermally Enhanced Package
• Manufacturer: Allegro MicroSystems, Inc.

ACS709
Definitions of Dynamic Response Characteristics
Propagation delay (t
output to reflect a change in the primary current signal. Propaga-
tion delay is attributed to inductive loading within the linear IC
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.
Response time (t
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.
Rise time (t
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 IC, in which ƒ(–3 dB)
= 0.35 / t
eddy current losses observed in the conductive IC ground plane.
r
. Both t
r
). The time interval between a) when the device
r
and t
RESPONSE
PROP
RESPONSE
). The time required for the device
). The time interval between a) when
are detrimentally affected by
High Bandwidth, Fast Fault Response Current Sensor IC
I (%)
I (%)
I (%)
90
90
90
10
0
0
0
In Thermally Enhanced Package
Propagation Time, t
Primary Current
Primary Current
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Primary Current
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Response Time, t
Rise Time, t
Transducer Output
Transducer Output
Transducer Output
PROP
r
RESPONSE
t
t
t
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