Data Sheet
Hall Effect Linear Current Sensor with Overcurrent
Fault Output for < 100 V Isolation Applications
ACS711
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
COMMON OPERATING CHARACTERISTICS Valid across the full range of T
A
for the LC package and at T
A
= 25°C for the EX package,
V
CC
= 3.3 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. Max. Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
1
V
CC
3 3.3 5.5 V
Supply Current I
CC
V
CC
= 3.3 V, output open – 4 5.5 mA
Output Capacitance Load C
LOAD
VIOUT to GND – – 1 nF
Output Resistive Load R
LOAD
VIOUT to GND 15 – – kΩ
Primary Conductor
Resistance
R
IP
EX package – 0.6 – mΩ
LC package, T
A
= 25°C – 1.2 – mΩ
VIOUT Rise Time t
r
I
P
= I
PMAX
, T
A
= 25°C, COUT = open – 3.5 – μs
Propagation Delay Time t
PROP
I
P
= I
P
(max), T
A
= 25°C, COUT = open – 1.2 – µs
Response Time t
RESPONSE
I
P
= I
P
(max), T
A
= 25°C, COUT = open – 4.6 – µs
Internal Bandwidth
2
BW
I
–3 dB, T
A
= 25°C – 100 – kHz
Nonlinearity E
LIN
Over full range of I
P
– ±1 – %
Symmetry E
SYM
Apply full scale I
P
– 100 – %
VIOUT Saturation Voltages
V
IOH
V
CC
–
0.3
– – V
V
IOL
– – 0.3 V
Quiescent Output Voltage V
IOUT(Q)
I
P
= 0 A, T
A
= 25°C – V
CC
/ 2 – V
Power-On Time t
PO
Output reaches 90% of steady-state level, T
A
= 25°C,
20 A present on primary conductor
– 35 – μs
¯
F
¯
¯
A
¯
U
¯¯
L
¯
¯
T
¯
Pin Characteristics
¯
F
¯
¯
A
¯
U
¯¯
L
¯
¯
T
¯
Operating Point I
FAULT
– ± 1 x I
P
– A
¯
F
¯
¯
A
¯
U
¯¯
L
¯
¯
T
¯
Output Pullup
Resistor
R
PU
1 – – kΩ
¯
F
¯
¯
A
¯
U
¯¯
L
¯
¯
T
¯
Output Voltage
V
OH
–
V
CC
–
0.3
– V
V
OL
R
PU
= 1 kΩ – 0.3 – V
¯
F
¯
¯
A
¯
U
¯¯
L
¯
¯
T
¯
Response Time t
FAULT
Measured from | I
P
| > | I
FAULT
| to V
FAULT
≤ V
OL
– 1.3 – µs
V
CC
Off Voltage Level for
Fault Reset
3
V
CCFR
– – 200 mV
V
CC
Off Duration for
Fault Reset
3
t
CCFR
100 – – µs
1
Devices are programmed for maximum accuracy at 3.3 V V
CC
levels. The device contains ratiometry circuits that accurately alter the 0 A Output
Voltage and Sensitivity level of the device in proportion to the applied V
CC
level. However, as a result of minor nonlinearities in the ratiometry circuit
additional output error will result when V
CC
varies from the 3.3 V V
CC
level. Customers that plan to operate the device from a 5 V regulated supply
should contact their local Allegro sales representative regarding expected device accuracy levels under these bias conditions.
2
Calculated using the formula BW
I
= 0.35 / t
r
.
3
After the
¯
F
¯
¯
A
¯
U
¯¯
L
¯
¯
T
¯
pin is latched low, the only way to reset it is through a power-off and power-on cycle on the VCC pin. For fault reset, V
CC
must stay
below V
CCFR
for a period greater than t
CCFR
before settling to the normal operation voltage (3 to 5.5 V).