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High speed integrated current sensor ic Allegro ACS70331EOLCTR-2P5U3 with low noise analog output and gmr technology

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High speed integrated current sensor ic Allegro ACS70331EOLCTR-2P5U3 with low noise analog output and gmr technology

working temperature : -40℃~+85℃

Current Range : 0A~2.5A

Voltage - Supply : 3.3V

Current Terminal Resistance : 1.7mΩ

Band Width : 1MHz

Response Time (tr) : 460ns

Sensitivity : 800mV/A

Bidirectional Current Detection : Not supported

Description : 0A~2.5A 800mV/A SOIC-8 Current Sensors RoHS

Mfr. Part # : ACS70331EOLCTR-2P5U3

Model Number : ACS70331EOLCTR-2P5U3

Package : SOIC-8

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Product Overview

The Allegro ACS70331 is a high-sensitivity, integrated current sensor IC utilizing Giant Magneto-Resistive (GMR) technology for current sensing applications up to 5 A. It offers a 25x improvement in sensitivity over traditional Hall-effect sensors, providing a low-noise, high-speed analog output proportional to AC and DC current. With a 1 MHz bandwidth and a response time of 535 ns, it is suitable for magnetically noisy environments due to its differential GMR element configuration and significant rejection of stray magnetic fields. The device operates from a single 3.3 V supply and is available in space-saving QFN-12 and SOIC-8 surface-mount packages. It is factory-programmed with four sensitivity and offset levels to optimize performance across various current measurement ranges.

Product Attributes

Brand: Allegro
Technology: Giant Magneto-Resistive (GMR)

Technical Specifications

Feature	Specification	Details
Current Sensing Capability	Up to 5 A (DC or AC)
Bandwidth	1 MHz
Response Time	< 550 ns (typically 535 ns)
Noise	8 mA(rms) at 1 MHz
Output Type	Non-ratiometric, Analog	Proportional to AC and DC current
Supply Voltage	Single 3.3 V	Also supports 3 V to 4.5 V operation (high DC PSRR)
Primary Conductor Resistance	1.1 m (QFN-12)	1.7 m (SOIC-8)
Packages	12-contact QFN (3 mm 3 mm 0.75 mm)	8-lead SOIC
Operating Temperature Range	-40C to 85C	Commercial temperature range
Stray Field Rejection	High	Differential GMR configuration
Absolute Maximum Supply Voltage	7 V
Maximum Continuous Current	10 A
Maximum Junction Temperature	100C
Selection Guide (Examples)
Part Number	ACS70331EESATR-2P5U3	Current Sensing Range: 0 to 2.5 A, Sensitivity: 800 mV/A, Package: 12-contact QFN
Part Number	ACS70331EOLCTR-005B3	Current Sensing Range: 5 A, Sensitivity: 200 mV/A, Package: 8-lead SOIC
Electrical Characteristics
Supply Current (ICC)	4.5 mA (typ)
Power-On Time (tPO)	5 s (typ)
Fuse Power Down Time (tFPD)	80-120 s (typ)
Output Resistive Load (RL)	22 k
Output Capacitive Load (CL)	100 pF (stable) / 50 pF (maintains BW)
Source Current (ISource)	0.4 mA (typ)
Sink Current (ISINK)	0.5 mA (typ)
Bandwidth (BW)	1 MHz (-3 dB)
Noise Density (IND)	8 ARMS/Hz (input referred)
Power Supply Rejection Ratio (PSRR)	-40 dB (DC to 100 Hz)	-30 dB (100 Hz to 100 kHz)
Power Supply Offset Error (VOE(PS))	10 mV (typ)
Power Supply Sensitivity Error (ESENS(PS))	0.5 % (typ)
Nonlinearity (ELIN)	0.2 % (typ)

2306061118_ALLEGRO-ACS70331EOLCTR-2P5U3_C459301.pdf

High speed integrated current sensor ic Allegro ACS70331EOLCTR-2P5U3 with low noise analog output and gmr technology Images

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