Current Sensor ICs

Low-Resistance Current Sensor IC with Overcurrent Fault Protection

ACS37220

Markets Served

The ACS37220 simplifies high-current sensing in automotive applications, offering ultra-low resistance (<100µΩ) for improved efficiency and an integrated overcurrent fault output for enhanced system protection. Available in QFN and SOICW-6 packages for design flexibility.

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Product Details

Top Features

  • AEC-Q100 Grade 0 qualified
  • Small footprint, 4 mm × 4 mm QFN “EZ” package with wettable flank, features overcurrent fault output with user-configurable threshold to provide fast short-circuit detection for enhanced system protection
  • Widebody fused-lead SOIC-6 “MZ” package supports a similar Reinforced Isolation rating to comparable SOICW-16 packages in just half the size
Target Application

Part Number Specifications and Availability

View Full Specification Details

ACS37220LEZATR-050B5

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±50
bandwidth_khz
150
supply_voltage_v
5
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
2.5
features
Adjustable Overcurrent Fault

ACS37220LEZATR-100B3

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±100
bandwidth_khz
150
supply_voltage_v
3.3
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
1.65
features
Adjustable Overcurrent Fault

ACS37220LEZATR-100B5

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±100
bandwidth_khz
150
supply_voltage_v
5
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
2.5
features
Adjustable Overcurrent Fault

ACS37220LEZATR-150B3

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±150
bandwidth_khz
150
supply_voltage_v
3.3
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
1.65
features
Adjustable Overcurrent Fault

ACS37220LEZATR-150B5

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±150
bandwidth_khz
150
supply_voltage_v
5
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
2.5
features
Adjustable Overcurrent Fault

ACS37220LEZATR-200B3

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±200
bandwidth_khz
150
supply_voltage_v
3.3
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
1.65
features
Adjustable Overcurrent Fault

ACS37220LEZATR-200B5

basic_isolation_working_voltage_vrms
-
reinforced_isolation_working_voltage_vrms
-
isolation_voltage_vrms
100
creepage_mm
1
clearance_mm
-
primary_conductor_resistance_mohm
0.1
architecture
Bidirectional
current_measurement_range_a
±200
bandwidth_khz
150
supply_voltage_v
5
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
Yes
package
7-Pin QFN
market
Automotive, Industrial
quiescent_output_v
2.5
features
Adjustable Overcurrent Fault

ACS37220LMZTR-060B3

basic_isolation_working_voltage_vrms
1097
reinforced_isolation_working_voltage_vrms
565
isolation_voltage_vrms
5656
creepage_mm
8.5
clearance_mm
8.5
primary_conductor_resistance_mohm
0.8
architecture
Bidirectional
current_measurement_range_a
±60
bandwidth_khz
150
supply_voltage_v
3.3
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
-
package
6-Pin SOIC
market
Automotive, Industrial
quiescent_output_v
1.65
features
-

ACS37220LMZTR-060B5

basic_isolation_working_voltage_vrms
1097
reinforced_isolation_working_voltage_vrms
565
isolation_voltage_vrms
5656
creepage_mm
8.5
clearance_mm
8.5
primary_conductor_resistance_mohm
0.8
architecture
Bidirectional
current_measurement_range_a
±60
bandwidth_khz
150
supply_voltage_v
5
temp_ranges
-40°C to 150°C
aec_q100
Yes
over_current_fault
-
package
6-Pin SOIC
market
Automotive, Industrial
quiescent_output_v
2.5
features
-

ACS37220 Product Overview

The ACS37220 is a magnetic current sensor offered in a 4x4mm QFN package designed to replace high-power sense resistors in high-current monitoring applications requiring an isolation voltage below 100V. Compared to shunts, this device provides a smaller footprint, higher efficiency and simpler integration.

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Design Tools

ECAD FILE

ACS37220

ACS37220 ECAD Model Type Image
ECAD FILE

ACSEVB-MZ6-MY6 Schematic
Gerber File

ACSEVB-MZ6-MY6 PCB Information
Gerber File

MY-6 Package Files
Gerber File

MZ-6 Package Files
Software

Software Portal
Third Party Tool

Mikroe Hall Current 20 Click Add-on Board
Third Party Tool

Pololu ACS37220 Current Sensor Carrier
Third Party Tool

Pololu G2 High-Power Motor Driver

Technical Documentation

Understanding and Minimizing Sensitivity Shifts Due to PCB Layout and Solder Variability for the ACS37220 in EZ Package
Application Note

Understanding and Minimizing Sensitivity Shifts Due to PCB Layout and Solder Variability for the ACS37220 in EZ Package

High-Efficiency EZ Package with Ultralow Power Dissipation in a Compact 16 MM2 Footprint
Application Note

High-Efficiency EZ Package with Ultralow Power Dissipation in a Compact 16 MM2 Footprint

Vias-in-Pad Improves Thermal Performance for Allegro Current Sensors
Application Note

Vias-in-Pad Improves Thermal Performance for Allegro Current Sensors

How to Analyze and Compare Allegro Current Sensor and ADC Error Components
Application Note

How to Analyze and Compare Allegro Current Sensor and ADC Error Components

Current Sensing Beyond Shunt Resistors for Modern Electronics
Blog

Current Sensing Beyond Shunt Resistors for Modern Electronics

Magnetic Sensors are a Great Alternative to Traditional Shunt Resistors for Industrial Current Sensing
Blog

Magnetic Sensors are a Great Alternative to Traditional Shunt Resistors for Industrial Current Sensing

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ACS37220 EZ Generic Eval Board User Guide
Guide

ACS37220 EZ Generic Eval Board User Guide

Is Your Current Sensing Architecture the Weak Link in Your Steering System
Technical Article

Is Your Current Sensing Architecture the Weak Link in Your Steering System

Overcoming Complexity Challenges in PCB Design with Magnetic Current Sensors
Technical Article

Overcoming Complexity Challenges in PCB Design with Magnetic Current Sensors

Overcoming Heating Challenges in PCB Design with Magnetic Current Sensors
Technical Article

Overcoming Heating Challenges in PCB Design with Magnetic Current Sensors

Overcoming Size Challenges in PCB Design with Magnetic Current Sensors
Technical Article

Overcoming Size Challenges in PCB Design with Magnetic Current Sensors

Next-Generation Current Measurement: Addressing PCB Design Challenges with Magnetic Current Sensors
Technical Article

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