Data Sheet

Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS756
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
COMMON OPERATING CHARACTERISTICS
1
over full range of T
OP
, and V
CC
= 5 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage
2
V
CC
3 5.0 5.5 V
Supply Current I
CC
V
CC
= 5.0 V, output open – 10 14 mA
Power On Time t
PO
T
A
= 25°C – 35 – s
Rise Time t
r
I
P
= three-quarter scale of I
P
+, T
A
= 25°C, C
OUT
= 0.47 nF – 3 – s
Internal Bandwidth
3
BW
i
–3 dB; I
P
is 10 A peak-to-peak; 100 pF from VIOUT to GND – 120 – kHz
Output Load Resistance R
LOAD(MIN)
VIOUT to GND 4.7 – – k
Output Load Capacitance C
LOAD(MAX)
VIOUT to GND – – 10 nF
Primary Conductor Resistance R
PRIMARY
T
A
= 25°C – 130 – 
Symmetry E
SYM
Over half-scale of Ip 98.5 100 101.5 %
Bidirectional 0 A Output V
OUT(QBI)
I
P
= 0 A, T
A
= 25°C – V
CC
/2 – V
Magnetic Offset Error
I
ERROM
I
P
= 0 A, after excursion of 100 A – ±0.23 – A
Ratiometry V
RAT
V
CC
= 4.5 to 5.5 V – 100 – %
Propagation Time t
PROP
T
A
= 25°C, C
OUT
= 100 pF, – 1 – s
1
Device is factory-trimmed at 5 V, for optimal accuracy.
2
Devices are programmed for maximum accuracy at 5.0 V V
CC
levels. The device contains ratiometry circuits that accurately alter the 0 A Output Volt-
age 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 ad-
ditional output error will result when V
CC
varies from the 5 V V
CC
level. Customers that plan to operate the device from a 3.3 V regulated supply should
contact their local Allegro sales representative regarding expected device accuracy levels under these bias conditions.
3
Guaranteed by design.