Allegro ACS714 current sensor datasheet

Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS714
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
COMMON THERMAL CHARACTERISTICS
1
Min. Typ. Max. Units
Operating Internal Leadframe Temperature T
A
E range –40 – 85 °C
L range –40 – 150 °C
Value Units
Junction-to-Lead Thermal Resistance
2
R
JL
Mounted on the Allegro ASEK 714 evaluation board 5 °C/W
Junction-to-Ambient Thermal Resistance R
JA
Mounted on the Allegro 85-0322 evaluation board, includes the power con-
sumed by the board
23 °C/W
1
Additional thermal information is available on the Allegro website.
2
The Allegro evaluation board has 1500 mm
2
of 2 oz. copper on each side, connected to pins 1 and 2, and to pins 3 and 4, with thermal vias connect-
ing the layers. Performance values include the power consumed by the PCB. Further details on the board are available from the Frequently Asked
Questions document on our website. Further information about board design and thermal performance also can be found in the Applications Informa-
tion section of this datasheet.
COMMON OPERATING CHARACTERISTICS
1
over full range of T
A
, C
F
= 1 nF, and V
CC
= 5 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. Max. Units
ELECTRICAL CHARACTERISTICS
Supply Voltage V
CC
4.5 5.0 5.5 V
Supply Current I
CC
V
CC
= 5.0 V, output open – 10 13 mA
Output Capacitance Load C
LOAD
VIOUT to GND – – 10 nF
Output Resistive Load R
LOAD
VIOUT to GND 4.7 – – k
Primary Conductor Resistance R
PRIMARY
T
A
= 25°C – 1.2 – m
Rise Time t
r
I
P
= I
P
(max), T
A
= 25°C, C
OUT
= open – 5 – s
Frequency Bandwidth f –3 dB, T
A
= 25°C; I
P
is 10 A peak-to-peak – 80 – kHz
Nonlinearity E
LIN
Over full range of I
P
– 1.5 – %
Symmetry E
SYM
Over full range of I
P
98 100 102 %
Zero Current Output Voltage V
IOUT(Q)
Bidirectional; I
P
= 0 A, T
A
= 25°C –
V
CC
×
0.5
–V
Power-On Time t
PO
Output reaches 90% of steady-state level, T
J
= 25°C, 20 A present
on leadframe
–35–s
Magnetic Coupling
2
– 12 – G/A
Internal Filter Resistance
3
R
F(INT)
1.7 k
1
Device may be operated at higher primary current levels, I
P
, and ambient, T
A
, and internal leadframe temperatures, T
A
, provided that the Maximum
Junction Temperature, T
J
(max), is not exceeded.
2
1G = 0.1 mT.
3
R
F(INT)
forms an RC circuit via the FILTER pin.