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High-Performance Power ICs and Hall-Effect Sensors
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Datasheets:
ACS706ELC-05C: Bidirectional 1.5 milli-ohms Hall Effect Based Linear Current Sensor with Voltage Isolation and 15 A Dynamic Range (PDF),
ACS706ELC-20A: Bidirectional 1.5 milli-ohms Hall Effect Based Linear Current Sensor with Voltage Isolation and 20 A Dynamic Range (PDF)
Selection Guides:
Hall-Effect Sensors,
Current Sensor Modules
FAQs:
ACS706 Current Sensor Frequently Asked Questions
Press Releases:
ACS706 Family: Allegro Introduces New Bidirectional 1.5 milli-ohms Hall-Effect-Based Linear Current Sensor Family
Product Evaluation Kits:
ASEK706ELC-05C Current Sensor Evaluation Kit,
ASEK706ELC-20A Current Sensor Evaluation Kit
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ACS706
Bidirectional 1.5 mΩ Hall Effect Based Linear Current Sensor
with Voltage Isolation and 5/20A Optimized Measurement Range
These parts have been discontinued. Samples are no longer available. For new customers or new applications, please refer to ACS712.
Features and Benefits
- Small footprint, low-profile SOIC8 package
- 1.5 mΩ internal conductor resistance
- 1600 VRMS minimum isolation voltage between pins 1-4 and 5-8
- 5 V, single supply operation
- 50 kHz bandwidth
- Output voltage proportional to ac and dc currents
- Factory-trimmed for accuracy
- Extremely stable output offset voltage
- Near-zero magnetic hysteresis
- Ratiometric output from supply voltage
- Functional equivalent to ACS704 with double the isolation voltage.
Description
The Allegro ACS706 family of current sensors provides small form factor and accurate solutions for current sensing in industrial, automotive, commercial, and communications systems. Typical applications include motor control, load detection and management, switched-mode 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 surface of 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 pins 1 and 2, to pins 3 and 4), which is the path used for current sensing. The internal resistance of this conductive path is typically 1.5 mΩ, 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 5 through 8). This allows the ACS706 family of sensors to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.
The ACS706 is provided in a small, surface mount SOIC8 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the flip-chip uses high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| ACS706ELC-05C | 8-lead SOIC | Yes | view data | -40 °C to 85 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. | |
| ACS706ELC-20A | 8-lead SOIC | Yes | view data | -40 °C to 85 °C | discontinued | Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor. |
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.