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ACS756
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
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
Power On Time
Rise Time
I CC
t PO
t r
V CC = 5.0 V, output open
T A = 25°C
I P = three-quarter scale of I P +, T A = 25°C, C OUT = 0.47 nF
–
–
–
10
35
3
14
–
–
mA
μ s
μ 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
Output Load Capacitance
Primary Conductor Resistance
Symmetry
Bidirectional 0 A Output
Magnetic Offset Error
Ratiometry
Propagation Time
R LOAD(MIN)
C LOAD(MAX)
R PRIMARY
E SYM
V OUT(QBI)
I ERROM
V RAT
t PROP
VIOUT to GND
VIOUT to GND
T A = 25°C
Over half-scale of Ip
I P = 0 A, T A = 25°C
I P = 0 A, after excursion of 100 A
V CC = 4.5 to 5.5 V
T A = 25°C, C OUT = 100 pF,
4.7
–
–
98.5
–
–
–
–
–
–
130
100
V CC /2
±0.23
100
1
–
10
–
101.5
–
–
–
–
k Ω
nF
μΩ
%
V
A
%
μ 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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
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