Product Overview
The Allegro ACS70310/1 is a fully monolithic linear current sensor IC incorporating a Hall element and BiCMOS integrated circuitry. It is designed for highly accurate current sensing when used with a ferromagnetic core. The IC is sensitive to magnetic flux density orthogonal to its package surface, providing an analog voltage output proportional to the applied flux density. Factory-programmed segmented linear temperature compensation ensures ultralow thermal drift with 1% sensitivity error and 5 mV offset error from 25C to 150C. Key features include on-board supply regulation with reverse-battery protection, very fast response time (2 s), and a high operating bandwidth (DC to 240 kHz). The ACS70311 variant adds undervoltage detection (UVD) and low-voltage programming capabilities. These sensors are AEC-Q100 Grade 0 automotive qualified and offer customer-programmable offset and sensitivity for enhanced accuracy. They are ideal for high-frequency automotive inverters and DC/DC converters.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: AEC-Q100 Grade 0, automotive qualified
- Package Type: 4-pin SIP (Suffixes: KT, OK)
- Leadform Options: TN, TH (KT only), TX (OK only)
- Lead Material: Lead (Pb) free, 100% matte tin leadframe plating
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Product Family | ACS70310 / ACS70311 | Linear Hall-Effect Current Sensor IC |
| Sensitivity Error (Factory Programmed) | 1% | From 25C to 150C |
| Offset Error (Factory Programmed) | 5 mV | From 25C to 150C |
| Operating Bandwidth | DC to 240 kHz | |
| Response Time | 2 s | |
| Supply Voltage (VCC) | 4.5 V to 5.5 V | |
| Reverse Supply Voltage Survivability | 18 V | |
| Output Voltage Survivability | +16 V to 6 V | |
| Operating Ambient Temperature | 40C to 150C | |
| Package Thickness | 1 mm | Case thickness |
| Undervoltage Detection (UVD) | Yes | ACS70311 only |
| Low-Voltage Programming | Yes | ACS70311 only |
| Broken Ground Detection | Yes | |
| Output Voltage Clamps | Yes | Customer-programmable |
| Noise (VIN) | 1.2 mG/(Hz) (Typ) | TA = 25C, CL = 1 nF, Sens = 5 mV/G |
| Package KT Thermal Resistance (RJA) | 174 C/W | On 1-layer PCB with exposed copper limited to solder pads |
| Package OK Thermal Resistance (RJA) | 177 C/W | On 1-layer PCB with exposed copper limited to solder pads |
| ESD Rating (HBM - ACS70310) | 12 kV | Per JEDEC JS-001 |
| ESD Rating (HBM - ACS70311) | 8 kV | Per JEDEC JS-001 |
| ESD Rating (CDM) | 1 kV | Per JEDEC JS-002 |
| Factory-Programmed Sensitivity Options | 1, 2.5, 5, 10 mV/G | See Selection Guide for specific part numbers |
| Programmable Sensitivity Range | 0.5 to 11.5 mV/G | Depends on factory-programmed sensitivity |
| Quiescent Output Voltage (Bidirectional) | 2.5 V (Typ) | At VCC = 5 V |
| Quiescent Output Voltage (Unidirectional) | 0.5 V (Typ) | At VCC = 5 V |
2401241352_ALLEGRO-ACS70311LKTATN-2P5B5-C_C3715879.pdf
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