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High-Performance Power ICs and Hall-Effect Sensors
Related Links:
Datasheets:
ACS752xCA-050: Current Sensor (PDF),
ACS752xCA-100: 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 Dual Power Supply Applications and Converting Sensed AC Currents into Peak Current Measurements (PDF),
Isolated Open Loop Current Sensing Using Hall Effect Technology in an Optimized Magnetic Circuit (PDF)
FAQs:
ACS752 Current Sensor Frequently Asked Questions
Press Releases:
ACS752: Allegro MicroSystems, Inc. Launches Improved Accuracy and Bandwidth Addition to Current Sensor Family
Design Support Tools:
ASEK752SCA-050 Current Sensor Evaluation Kit,
ASEK752SCA-100 Current Sensor Evaluation Kit
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ACS752
Current Sensors
These parts are in production but have been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Date of status change: November 1, 2006 (ACS752SCA-050); November 1, 2008 (ACS752SCA-100). Deadline for receipt of LAST TIME BUY orders: May 1, 2009. For existing customer transition, and for new customers or new applications, refer to the ACS756.
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
- 50 kHz bandwidth
- Automotive temperature range
- End-of-line factory-trimmed for gain and offset
- Ultra-low power loss: 130 µΩ internal conductor resistance
- Ratiometric output from supply voltage
- Extremely stable output offset voltage
- Small package size, with easy mounting capability
- Output proportional to AC and DC currents
Description
The Allegro ACS75x family of current sensors provides economical and precise solutions for 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 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 sensing. The internal resistance of this conductive path is typically 130 µΩ, 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 ACS75x 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 pins are coated with 100% matte tin, and there is no lead 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 |
|---|---|---|---|---|---|---|---|
| ACS752SCA-050 | 5-lead CA | -- | -- | -20 °C to 85 °C | last-time buy | samples not available | |
| ACS752SCA-100 | 5-lead CA | -- | -- | -20 °C to 85 °C | last-time buy | samples not available |
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.