ACS709LLF View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
ACS709LLF
Allegro MicroSystems
'ACS709LLF' PDF : 17 Pages View PDF
ACS709
High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
Definitions of Dynamic Response Characteristics
I (%)
Primary Current
Propagation delay (tPROP). 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
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.
90
Transducer Output
0
t
Propagation Time, tPROP
I (%)
90
Response time (tRESPONSE). 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.
0
Primary Current
Transducer Output
t
Response Time, tRESPONSE
I (%)
Rise time (tr). The time interval between a) when the device
reaches 10% of its full scale value, and b) when it reaches 90%
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 / tr. Both tr and tRESPONSE are detrimentally affected by
10
eddy current losses observed in the conductive IC ground plane.
0
Primary Current
Transducer Output
t
Rise Time, tr
Allegro MicroSystems, Inc.
15
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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