ACS715LLCTR-20A-T Allegro Microsystems Inc, ACS715LLCTR-20A-T Datasheet - Page 9

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ACS715LLCTR-20A-T

Manufacturer Part Number
ACS715LLCTR-20A-T
Description
IC, LINEAR CURRENT SENSOR, 10mA, 8-SOIC
Manufacturer
Allegro Microsystems Inc
Series
-r
Datasheet

Specifications of ACS715LLCTR-20A-T

Quiescent Current
10mA
Bandwidth
80kHz
Sensor Case Style
SOIC
No. Of Pins
8
Supply Voltage Range
4.5V To 5.5V
Operating Temperature Range
-40°C To +150°C
Polarization
Unipolar
Current - Sensing
20A
Accuracy
±1.5%
Sensitivity
185mV/A
Current - Supply
10mA
Sensor Type
Hall Effect
Voltage - Supply
4.5 V ~ 5.5 V
Output
500mV
Frequency
80kHz
Response Time
5µs
Operating Temperature
-40°C ~ 150°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ACS715LLCTR-20A-T
Manufacturer:
ALLEGRO
Quantity:
1 546
Part Number:
ACS715LLCTR-20A-T
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
ACS715
Definitions of Accuracy Characteristics
Sensitivity (Sens). The change in device output in response to a
1 A change through the primary conductor. The sensitivity is the
product of the magnetic circuit sensitivity (G / A) and the linear
IC amplifier gain (mV/G). The linear IC amplifier gain is pro-
grammed at the factory to optimize the sensitivity (mV/A) for the
full-scale current of the device.
Noise (V
(mV/G) and the noise floor for the Allegro Hall effect linear IC
(≈1 G). The noise floor is derived from the thermal and shot
noise observed in Hall elements. Dividing the noise (mV) by the
sensitivity (mV/A) provides the smallest current that the device is
able to resolve.
Linearity (E
the IC varies in direct proportion to the primary current through
its full-scale amplitude. Nonlinearity in the output can be attrib-
uted to the saturation of the flux concentrator approaching the
full-scale current. The following equation is used to derive the
linearity:
where V
sampled current approximates full-scale ±I
Quiescent output voltage (V
when the primary current is zero. For a unipolar supply voltage,
it nominally remains at V
into V
the resolution of the Allegro linear IC quiescent voltage trim and
thermal drift.
Electrical offset voltage (V
output from its ideal quiescent value of V
magnetic causes. To convert this voltage to amperes, divide by the
device sensitivity, Sens.
Accuracy (E
tion of the actual output from its ideal value. This is also known
as the total output error. The accuracy is illustrated graphically in
the output voltage versus current chart at right.
IOUT(Q)
IOUT_full-scale amperes
100 1–
NOISE
[ {
LIN
TOT
= 0.5 V. Variation in V
). The product of the linear IC amplifier gain
). The degree to which the voltage output from
). The accuracy represents the maximum devia-
2 (V
(
V
IOUT
IOUT
_full-scale amperes –V
CC
_half-scale amperes – V
= the output voltage (V) when the
OE
× 0.1 . Thus, V
IOUT(Q)
). The deviation of the device
IOUT(Q)
). The output of the device
CC
P
CC
can be attributed to
.
Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC
× 0.1 due to non-
IOUT(Q)
= 5 V translates
IOUT(Q)
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
)
)
[ {
Accuracy is divided into four areas:
 0 A at 25°C. Accuracy at the zero current flow at 25°C, with-
 0 A over Δ temperature. Accuracy at the zero current flow
 Full-scale current at 25°C. Accuracy at the the full-scale current
 Full-scale current over Δ temperature. Accuracy at the full-
Ratiometry. The ratiometric feature means that its 0 A output,
V
proportional to its supply voltage, V
used to derive the ratiometric change in 0 A output voltage,
V
The ratiometric change in sensitivity, Sens
Output Voltage versus Sampled Current
Accuracy at 0 A and at Full-Scale Current
IOUT(Q)
–I
out the effects of temperature.
including temperature effects.
at 25°C, without the effects of temperature.
scale current flow including temperature effects.
IOUT(Q)RAT
P
(A)
, (nominally equal to V
(%).
O e
v r
100
Temp erature
25°C Only
Accuracy
Accuracy
100
V
IOUT(Q)VCC
Sens
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
V
VCC
V
0 A
Increasing V
CC
Decreasing V
CC
CC
Average
/ 5 V
V
× 0.1) and sensitivity, Sens, are
/ Sens
/ 5 V
/ V
IOUT
CC
IOUT
Accuracy
25°C Only
IOUT(Q)5V
Full Scale
IOUT
. The following formula is
(V)
(V)
5V
RAT
30 A
(%), is defined as:
O e
Accuracy
v r
+I
Temp erature
P
(A)
9

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