Data Sheet

High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
ACS709
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 at T
A
= –40°C to 150°C, V
CC
= 5 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. Max. Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
1
V
CC
3 – 5.5 V
Nominal Supply Voltage V
CCN
– 5 – V
Supply Current I
CC
VIOUT open,
¯
F
¯ ¯
A
¯
U
¯¯
L
¯ ¯
T
¯
pin high – 11 14.5 mA
Output Capacitance Load C
LOAD
VIOUT pin to GND – – 10 nF
Output Resistive Load R
LOAD
VIOUT pin to GND 10 – – kΩ
Magnetic Coupling from Device Conductor
to Hall Element
MC
HALL
Current flowing from IP+ to IP– pins – 9.5 – G/A
Internal Filter Resistance
2
R
F(INT)
– 1.7 – kΩ
Primary Conductor Resistance R
PRIMARY
T
A
= 25°C – 1.1 – mΩ
ANALOG OUTPUT SIGNAL CHARACTERISTICS
Full Range Linearity
3
E
LIN
I
P
= ±I
P0A
–0.75 ±0.25 0.75 %
Symmetry
4
E
SYM
I
P
= ±I
P0A
99.1 100 100.9 %
Bidirectional Quiescent Output V
OUT(QBI)
I
P
= 0 A, T
A
= 25°C – V
CC
×0.5 – V
TIMING PERFORMANCE CHARACTERISTICS
VIOUT Signal Rise Time t
r
T
A
= 25°C, Swing I
P
from 0 A to I
P0A
,
no capacitor on FILTER pin, 100 pF from
VIOUT to GND
– 3 – μs
VIOUT Signal Propagation Time t
PROP
T
A
= 25°C, no capacitor on FILTER pin,
100 pF from VIOUT to GND
– 1 – μs
VIOUT Signal Response Time t
RESPONSE
T
A
= 25°C, Swing I
P
from 0 A to I
P0A
,
no capacitor on FILTER pin, 100 pF from
VIOUT to GND
– 4 – μs
VIOUT Large Signal Bandwidth
5
f
3dB
–3 dB, T
A
= 25°C, no capacitor on FILTER
pin, 100 pF from VIOUT to GND
– 120 – kHz
Power-On Time t
PO
Output reaches 90% of steady-state level,
no capacitor on FILTER pin, T
A
= 25°C
– 35 – μs
OVERCURRENT CHARACTERISTICS
Setting Voltage for Overcurrent Switchpoint
6
V
OC
V
CC
×0.25 – V
CC
×0.4 V
Signal Noise at Overcurrent
Comparator Input
I
NCOMP
– ±1 – A
Overcurrent Fault Switchpoint Error
7,8
E
OC
Switchpoint in V
OC
safe operating area;
assumes I
NCOMP
= 0 A
– ±5 – %
Overcurrent
¯
F
¯ ¯
A
¯
U
¯¯
L
¯ ¯
T
¯
Pin Output Voltage V
¯
F
¯ ¯
A
¯
U
¯¯
L
¯ ¯
T
¯
1 mA sink current at
¯
F
¯ ¯
A
¯
U
¯¯
L
¯ ¯
T
¯
pin
– – 0.4 V
Fault Enable (FAULT_EN Pin) Input Low
Voltage Threshold
V
IL
– – 0.1 × V
CC
V
Fault Enable (FAULT_EN Pin) Input High
Voltage Threshold
V
IH
0.8 × V
CC
– – V
Fault Enable (FAULT_EN Pin) Input
Resistance
R
FEI
– 1 – MΩ
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