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High-Performance Power ICs and Hall-Effect Sensors
Related Links:
Datasheets:
ACS755xCB-050: Current Sensor (PDF),
ACS755xCB-100: Current Sensor (PDF),
ACS755xCB-130: Current Sensor (PDF),
ACS755xCB-150: Current Sensor (PDF),
ACS755xCB-200: Current Sensor (PDF)
Selection Guides:
Hall-Effect Sensors,
Current Sensor Modules
Technical Publications:
Managing Noise Levels in the ACS75x Current Sensors (PDF),
Using Allegro Current Sensors in Current Divider Configurations for Extended Measurement Range (PDF),
Isolated Open Loop Current Sensing Using Hall Effect Technology in an Optimized Magnetic Circuit (PDF)
FAQs:
ACS755 Current Sensor Frequently Asked Questions
Press Releases:
ACS754: Allegro MicroSystems, Inc. Launches Improved Accuracy Addition to Current Sensor Family
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ACS755
Current Sensors
Features and Benefits
- Monolithic Hall IC for high reliability
- Single +5 V supply
- 3 kVRMS isolation voltage between terminals 4/5 and pins 1/2/3 for up to 1 minute
- 18 kHz bandwidth
- Automotive temperature range
- End-of-line factory-trimmed for gain and offset
- Ultra-low power loss: 100 µΩ internal conductor resistance
- Ratiometric output from supply voltage
- Extremely stable output offset voltage
- Small package size, with easy mounting capability
- Output proportional to DC currents
Description
The Allegro ACS755 family of current sensors provides economical and precise solutions for 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 sensor circuit with a copper conduction path located near the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted 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 will be valid when a current flows through the primary copper conduction path from terminal 4 to terminal 5, which is the path used for current sensing. 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 sensor leads (pins 1 through 3). This allows the ACS755 family of sensors 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 ACS75x 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.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| ACS755SCB-050-PFF | 5-lead CB | -- | -- | -20 °C to 85 °C | |||
| ACS755SCB-100-PFF | 5-lead CB | -- | -- | -20 °C to 85 °C | new | ||
| ACS755SCB-150-PFF | 5-lead CB | -- | -- | -20 °C to 85 °C | |||
| ACS755SCB-200-PFF | 5-lead CB | -- | -- | -20 °C to 85 °C | Contact Marketing Representative | ||
| ACS755SCB-200-PSF | 5-lead CB | -- | -- | -20 °C to 85 °C | last-time buy | samples not available | |
| ACS755KCB-150-PFF | 5-lead CB | -- | -- | -40 °C to 125 °C | |||
| ACS755LCB-050-PFF | 5-lead CB | -- | -- | -40 °C to 150 °C | |||
| ACS755LCB-100-PFF | 5-lead CB | -- | -- | -40 °C to 150 °C | |||
| ACS755LCB-130-PFF | 5-lead CB | -- | -- | -40 °C to 150 °C |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.