Document
ACS756xCB
Fully Integrated, Hall-Effect-Based Linear Current Sensor IC with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
FEATURES AND BENEFITS
• Industry-leading noise performance through proprietary amplifier and filter design techniques
• Total output error 0.8% at TA = 25°C • Small package size, with easy mounting capability • Monolithic Hall IC for high reliability • Ultra-low power loss: 100 µΩ internal conductor resistance • 3 kVRMS minimum isolation voltage from
pins 1-3 to pins 4-5 • 3.0 to 5.0 V, single supply operation • 3 µs output rise time in response to step input current • 20 or 40 mV/A output sensitivity • Output voltage proportional to AC or DC currents • Factory-trimmed for accuracy • Extremely stable output offset voltage • Nearly zero magnetic hysteresis
TÜV America Certificate Number: U8V 15 05 54214 037
UL Certified File No.: US-29755-UL
PACKAGE: 5-pin package (suffix CB)
DESCRIPTION
The Allegro ACS756 family of current sensor ICs provides economical and precise solutions for AC or DC current sensing in industrial, automotive, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, power supplies, and overcurrent fault protection.
The device consists of a precision, low-offset linear Hall circuit with a copper conduction path located near the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory.
The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sampling. The internal resistance of this conductive path is 100 µΩ typical, providing low power loss.
The thickness of the copper conductor allows survival of the device at up to 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads
PFF Leadform
PSF Leadform
Not to scale
Continued on the next page…
4 IP+
1 VCC
ACS756
IP
GND 2
5 IP– VIOUT 3
+5 V
CBYP 0.1 µF
CF RF
VOUT
Typical Application
The ACS756 outputs an analog signal (VOUT ) that varies linearly with the uni- or bi-directional AC or DC primary sampled current, IP , within the range specified. CF is for optimal noise management, with values that depend on the application.
ACS756xCB-DS, Rev. 9 MCO-0000202
February 8, 2023
ACS756xCB Fully Integrated, Hall-Effect-Based Linear Current Sensor IC with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
DESCRIPTION (continued)
(pins 1 through 3). This allows the A.