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ACS780XLR Datasheet(PDF) 16 Page - Allegro MicroSystems

Part No. ACS780XLR
Description  Core-less, micro-sized, 100 A continuous current package
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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ACS780XLR Datasheet(HTML) 16 Page - Allegro MicroSystems

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High-Precision Linear Hall-Effect-Based
Current Sensor IC With 200 µΩ Current Conductor
ACS780xLR
16
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Definitions of Dynamic Response Characteristics
POWER-ON TIME (tPO)
When the supply is ramped to its operating voltage, the device
requires a finite time to power its internal components before
responding to an input magnetic field.
Power-OnTime,tPO, is defined as the time it takes for the output
voltage to settle within ±10% of its steady state value under an
applied magnetic field, after the power supply has reached its
minimum specified operating voltage, VCC(min), as shown in the
chart at right.
RISE TIME (tr)
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.
Bothtr and tRESPONSE are detrimentally affected by eddy current
losses observed in the conductive IC ground plane.
RESPONSE TIME (tRESPONSE)
The time interval between a) when the applied current reaches
80% of its final value, and b) when the sensor reaches 80% of its
output corresponding to the applied current.
PROPAGATION DELAY (tPD)
The time interval between a) when the input current reaches 20%
of its final value, and b) when the output reaches 20% of its final
value.
POWER-ON RESET VOLTAGE (VPOR )
At power-up, to initialize to a known state and avoid current
spikes, the sensor is held in Reset state. The Reset signal is
disabled when VCC reaches VUVLOH and time tPORR has elapsed,
allowing output voltage to go from a high-impedance state
into normal operation. During power-down, the Reset signal is
enabled when VCC reaches VPORL, causing output voltage to go
into a high-impedance state. (Note that a detailed description
ofPORandUVLOoperationcanbefoundintheFunctional
Description section.)
Power-On Time (tPO)
Propagation Delay (tPD) and Rise Time (tr)
Response Time (tRESPONSE)
Primary Current
VOUT
90
10
20
0
(%)
Propagation Delay, tPROP
Rise Time, tr
t
Primary Current
VOUT
80
0
(%)
Response Time, tRESPONSE
t


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