Document
ACS758xCB
Thermally Enhanced, Fully Integrated, Hall-Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor
FEATURES AND BENEFITS
• Industry-leading noise performance through proprietary amplifier and filter design techniques
• Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high-voltage applications
• Total output error improvement through gain and offset trim over temperature
• Small package size, with easy mounting capability • Monolithic Hall IC for high reliability • Ultralow power loss: 100 µΩ internal conductor
resistance • Galvanic isolation allows use in economical, high-side
current sensing in high-voltage systems • AEC-Q100 qualified
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TÜV America Certificate Number: U8V 15 05 54214 037
UL Certified File No.: US-29755-UL
PACKAGE: 5-Pin CB Package
PFF Leadform
PSF Leadform
PSS Leadform
DESCRIPTION
The Allegro™ ACS758 family of current sensor ICs provides economical and precise solutions forAC or DC current sensing. Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection.
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 output voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory.
High-level immunity to current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology, provides low output voltage ripple and low offset drift in high-side, high-voltage applications.
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 high overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads
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ACS758-DS, Rev. 18 MCO-0000203
+3.3 or 5 V
VOUT
CBYP 0.1 µF
CF RF
1 VCC
5 IP–
ACS758
2 GND
IP
4 3 VIOUT IP+
Application 1: The ACS758 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.
Typical Application
May 16, 2022
ACS758xCB
Thermally Enhanced, Fully Integrated, Hall-Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor
FEATURES AND BENEFITS (CONTINUED)
• 3.0 to 5.5 V, single supply operation • 120 kHz typical bandwidth • 3 µs output rise time in response to step input current • Output voltage proportional to AC or DC currents • Factory-trimmed for accuracy • Extremely stable output offset voltage • Nearly zero magnetic hysteresis
DESCRIPTION (CONTINUED)
(pins 1 through 3). This allows the ACS758 family of sensor ICs to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.
The device is fully calibrated prior to shipment from the factory. The ACS758 family is lead (Pb) free. All leads are plated with 100% matte tin, and there is no Pb inside the package. The heavy gauge leadframe is made of oxygen-free copper.
Selection Guide
Part Number [1]
ACS758LCB-050B-PFF-T ACS758LCB-050U-PFF-T ACS758LCB-100B-PFF-T ACS758LCB-100B-PSF-T ACS758LCB-100U-PFF-T ACS758KCB-150B-PFF-T ACS758KCB-150B-PSF-T ACS758KCB-150B-PSS-T ACS758KCB-150U-PFF-T ACS758KCB-150U-PSF-T ACS758ECB-200B-PFF-T ACS758ECB-200B-PSF-T ACS758ECB-200B-PSS-T ACS758ECB-200U-PFF-T ACS758ECB-200U-PSF-T
Package
Terminals Signal Pins
Formed Formed Formed Straight Formed Formed Straight Straight Formed Straight Formed Straight Straight Formed Straight
Formed Formed Formed Formed Formed Formed Formed Straight Formed Formed Formed Formed Straight Formed Formed
Primary Sampled Current, IP (A) ±50 50 ±100 ±100 100 ±150 ±150 ±150 150 150 ±200 ±200 ±200 200 200
Sensitivity Sens (Typ.)
(mV/A) 40. 60. 20. 20. 40. 13.3 13.3 13.3 26.7 26.7 10. 10. 10. 20. 20
[1] Additional leadform options available for qualified volumes.
Current Directionality
Bidirectional Unidirectional Bidirectional Bidirectional Unidirectional Bidirectional Bidrectional Bidirectional Unidirectional Unidirectional Bidirectional Bidirectional Bidirectional Unid.