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ACS37612 Datasheet Preview

ACS37612 Datasheet

Hall-Effect Current Sensor

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ACS37612
Coreless, High Precision, Hall-Effect Current Sensor IC
with Common-Mode Field Rejection and High Bandwidth (240 kHz)
FEATURES AND BENEFITS
• Eliminates need for concentrator core or shield
• Suited for applications where current flows through
busbar or PCB
• Very wide sensing range (2.5 to 20 mV/G)
□Ideal for sensing currents from <200 A to >1000 A
• Factory-programmed segmented linear temperature
compensation (TC) provides low thermal drift
□Sensitivity ±1% (typ)
□Offset ±3 mV (typ)
• Differential Hall sensing rejects common-mode
magnetic fields
• High operating bandwidth: DC to 240 kHz
• AEC-Q100 Grade 0, automotive qualified
• Contactless, lossless, non-invasive current sensing
Very fast response time (<2 μs typ)
• 3.3 or 5.0 V single supply operation
• Ratiometric output with unidirectional and
bidirectional modes
• Immune to mechanical stress
• Monolithic Hall IC for high reliability
• Wide ambient temperature range: –40°C to 150°C
• Surface mount, small footprint, low-profile
TSSOP8 package
PACKAGE:
8-pin TSSOP package (suffix LU)
Not to scale
DESCRIPTION
The Allegro ACS37612 current sensor IC enables low-cost
solutions for AC and DC current sensing without the need for
an external field concentrator core or shield. It is designed for
applications where hundreds of amps flow through a busbar
or PCB.
Applied current through a busbar or PCB traces generates a
magnetic field that is sensed by the monolithic, low-offset,
linear Hall IC. The differential sensing topology virtually
eliminates all types of errors due to common-mode stray
magnetic fields. High isolation is achieved via the no-contact
nature of this simple assembly.
The ACS37612 is offered in 140 kHz and 240 kHz bandwidth
options, making it ideal for inverter phase current sensing,
load detection and management, power supplies, and DC/
DC converters where fast switching is required. The high
response time enables overcurrent fault detection in safety-
critical applications. A –40°C to 150°C ambient operating
temperature range and a stellar ESD rating make it ready for
harsh automotive environments.
TheACS37612 is suitable for space-constrained applications
because of its low-profile 8-pin surface mount TSSOPpackage
(thin-shrink small outline package, suffix LU) that is lead
(Pb) free, with 100% matte tin leadframe plating.
TYPICAL APPLICATIONS
• High voltage traction motor inverter
• 48 V / 12 V auxiliary inverter
• Battery monitoring
• Overcurrent detection
• DC/DC converter
• Smart fuse
• Power distribution unit (PDU)
• Power supply
Figure 1: Current Through PCB
ACS37612-DS
MCO-0000792
Figure 2: Current Through Busbar
March 9, 2020




Allegro

ACS37612 Datasheet Preview

ACS37612 Datasheet

Hall-Effect Current Sensor

No Preview Available !

ACS37612
Coreless, High Precision, Hall-Effect Current Sensor IC
with Common-Mode Field Rejection and High Bandwidth (240 kHz)
SELECTION GUIDE
Part Number
ACS37612LLUATR-005B5
ACS37612LLUATR-010B3
ACS37612LLUATR-010B5
ACS37612LLUATR-015B5
ACS37612LLUATR-015U5
Differential
Magnetic
Input Range, (G)
±400
±135
±200
±130
0 to 265
Sensitivity
Sens (Typ.)
(mV/G) [1]
5
10
10
15
15
Nominal Supply
Voltage (V)
5
3.3
5
5
5
Bandwidth
(kHz)
140
[1] Measured at nominal supply voltage. Contact Allegro for other sensitivity options.
[2] Contact Allegro for additional packing options.
TA
(°C)
–40 to 150
ACS 37612 L LUA TR - 010 B 3
Clamps:
[blank] – Default, Clamps disabled
C – Clamps enabled
Bandwidth:
[blank] – Default, BW = 140 kHz
H – High, BW = 240 kHz
Supply Voltage:
5 – VCC = 5 V
3 – VCC = 3.3 V
Output Directionality:
B – Bidirectional (positive and negative current)
U – Unidirectional (only positive current)
Typical Sensitivity (mV/G)
Packing Designator
Package Designator
Operating Temperature Range
5-Digit Part Number
Allegro Current Sensor
Packing [2]
4000 pieces per 13-inch reel
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2


Part Number ACS37612
Description Hall-Effect Current Sensor
Maker Allegro
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