7Semi ACS772 50A 200KHz Current Sensor, Automotive Grade
Overview
The 7Semi ACS772 Current Sensor is a high-precision Hall-effect based linear current sensor designed for high-current measurement up to 50A.
Based on Allegro MicroSystems ACS772 IC
Provides analog voltage output proportional to current
Designed for automotive and industrial applications
Suitable for high-power systems requiring fast and accurate current sensing
Working Principle
Current flows through an integrated low-resistance conductor
Generates a magnetic field
Internal Hall-effect sensor detects magnetic field
Signal conditioning circuit outputs linear analog voltage
Output voltage input current (AC or DC)
Measurement Chstrong> 50A (bidirectional)
Peak Current Capability: up to ~400A (short duration) Sensitivity: ~40 mV/A Linearity: ~0.9% Total Accuracy: ~2.1% over lifetime
Electrical Characteristics
Supply Voltage: 5V
Supply Current: up to ~15 mA
Internal Conductor Resistance: ~100
Very low resistance minimal power loss
Output Characteristics
Type: Analog (ratiometric voltage output)
Zero Current Output: ~Vcc/2 (~2.5V at 5V supply)
Bandwidth: 200 kHz
Response Time: ~2.5 s
Suitable for high-speed current monitoring and PWM signals
Isolation &Dielectric Strength: up to ~4800 Vrms
Enables safe high-side current sensing
Performance Characteristics
High bandwidth (200 kHz) fast-changing signals
Low noise design with integrated shielding
Digitally compensated gain & offset
Wide temperature operation: 40C to +150C
Automotive Grade Features
AEC-Q100 Grade 1 qualified
Designed for:
High reliability
Harsh environments
Automotive electronics
Internal Architecture
Hall-effect sensing element
Precision amplifier
Temperature compensation circuit
Integrated current conductor
Digital calibration system
Functional Behavior
Measures:
Outputs:
Linear analog voltage centered at mid-supply
Key Technical Features
50A bidirectional current sensing
200 kHz bandwidth
Fast 2.5 s response
5V operation
Low conductor resistance (100 )
High isolation capability
Automotive-grade reliability
Analog linear output
Advantages
High accuracy for high-current measurement
Electrically isolated sensing
Suitable for high-speed signals
Low power loss
Robust industrial/automotive performance
Limitations
Analog output requires ADC
Fixed sensitivity (less flexible than digital sensors)
Slight offset drift possible with temperature
Larger size compared to low-current ICs
Applications
Electric vehicles (EV systems)
Motonverters
Power supplies
Battery management systems (BMS)
Overcurrent protection systems
Technical Summary
The ACS772 50A sensor is a high-performance Hall-effect current sensor that:
Provides fast, isolated, and accurate current measurement
Handles high current (50A) with minimal loss
Is optimized for automotive, industrial, and power electronics systems
Best suited for:
High-current + high-speed applications
Systems requiring isolation and reliabilit