ACS37610: Low Noise, Standalone, Coreless Differential Current Sensor IC with Overcurrent and Overtemperature Detection

The ACS37610 provides a highly accurate method of measuring 100 A to >4000 A flowing through a busbar or a PCB without needing a concentrator core or a U-Shaped Magnetic Shield reducing system complexity, bill of material (BOM), cost, footprint, and weight. The differential measurement provides excellent immunity to stray magnetic fields without the need for a magnetic shield that often slows down the response time and adds non-linearity error. 

The ACS37610 features advanced Hall elements, resulting in a 2.5× improvement in signal-to-noise ratio (SNR) and a 2× lower noise relative to the ACS37612 while achieving a typical accuracy of 1% across an extended ambient temperature range: –40°C to 150°C. The lower noise provides superior resolution required for accurate torque control, while the sensor’s 4× higher sensitivity range enables flexible busbar and PCB designs 

A dedicated overcurrent and overtemperature fault pin, a 250kHz bandwidth and a slew of built-in diagnostics make it ideal for safety-critical applications. Accuracy is enhanced by user programmability, which allows the device to be optimized in the application and cancels errors due to mechanical assembly tolerances.  

The ACS37610 is offered in a low-profile 8-pin surface mount TSSOP package (thin-shrink small outline package, suffix LU) that is ideal for space-constrained applications, while allowing simple surface mount assembly. 

• Differential Hall-based sensing provides immunity to stray magnetic fields while eliminating large and expensive concentrating cores and shields.
• Quick overcurrent and overtemperature fault output ideal for safety critical applications
• Wide current sensing range (100 A to >4000 A) with single busbar or PCB design
• High customer programmability and lower noise provide high accuracy (<1% typ)
• High isolation and reliability is achieved with up to 250 kHz sensor bandwidth 

Typical Applications: 

Automotive 

• High Voltage Traction Motor Inverter 
• 48 V / 12 V Auxiliary Inverter (Starter Generator) 
• Heterogeneous Redundant Battery Monitoring 
• Overcurrent Detection 
• DC/DC Converter 
• Smart Fuse 
• Power Distribution Unit (PDU) 

Industrial 

• Switching Power Supplies 
• DC/DC converters 
• DC/AC inverters 
• Grid Infrastructure and Power Distribution