Fast response current sensor Allegro ACS70310LKTATN-2P5B5-C featuring wide operating bandwidth from DC to 240 kilohertz
Product Overview
The Allegro ACS70310/1 is a highly precise, programmable linear Hall-effect current sensor IC designed for core-based current sensing applications. It integrates a Hall element with BiCMOS circuitry, offering an analog voltage output proportional to the applied magnetic flux density. The ACS70311 variant includes undervoltage detection (UVD) and low-voltage programming capabilities. These sensors are engineered for high-frequency automotive applications such as inverters and DC/DC converters, providing fast response times (2 s) and a wide operating bandwidth (DC to 240 kHz). Key features include factory-programmed temperature compensation for 1% sensitivity error and 5 mV offset error, on-board supply regulation with reverse-battery protection for enhanced Electrical Overstress (EOS) immunity, and customer-programmable offset and sensitivity for superior accuracy. The devices are AEC-Q100 Grade 0 automotive qualified and available in thin, lead-free SIP packages.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: AEC-Q100 Grade 0, automotive qualified
- Material: Lead-free, 100% matte tin leadframe plating
- Origin: U.S.A.
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Product Family | Linear Hall-Effect Current Sensor IC | ACS70310 / ACS70311 |
| Core Functionality | Analog voltage output proportional to magnetic flux density | For core-based current sensing |
| Sensitivity Error (Factory Programmed) | 1% | From 25C to 150C |
| Offset Error (Factory Programmed) | 5 mV | From 25C to 150C |
| Response Time | 2 s | Typical |
| Operating Bandwidth | DC to 240 kHz | Small signal -3 dB |
| Supply Voltage | 4.5 V to 5.5 V | Typical operating range |
| Reverse Battery Protection | VCC pin survives 18 V | |
| Output Voltage Survival | VOUT pin survives +16 V to 6 V | |
| Temperature Range | 40C to 150C | Ambient automotive temperature range |
| Package Type | 4-pin SIP | Suffixes: KT, OK |
| Package Thickness | 1 mm | Case thickness |
| Leadform Options | TN, TH (KT only), TX (OK only) | |
| ACS70311 Specific Features | Undervoltage Detection (UVD), Low-voltage programming | |
| Diagnostics | Broken ground detection, clamps, power-on reset, under/overvoltage detection | |
| Programmability | Customer-programmable offset and sensitivity | |
| Noise | 1.4 mG/(Hz) | Typical (VIN) |
| Programming Interface | Serial, bidirectional on VOUT | Manchester encoding |
| Power-On Reset Voltage (POR) | VPOR_H: 3.7-4.3 V (rising), VPOR_L: 3.0-3.75 V (falling) | ACS70310 only |
| Overvoltage Detection (OVD) | VOVD_H: 6.5 V, VOVD_L: 6 V | |
| Undervoltage Detection (UVD) | VUVD_H: 4.0-4.4 V, VUVD_L: 3.6-4.0 V | ACS70311 only |
| Quiescent Output Voltage (VOUT(Q)) | 0.5 V (Unidirectional), 2.5 V (Bidirectional) | Nominal at 5V VCC, 25C |
| Sensitivity Programming Range | 0.5 mV/G to 11.5 mV/G | Depending on part number |
| Sensitivity Linearity Error | 0.5% to 1.1% | Depending on field range |
| Quiescent Voltage Output Error | 5 mV | Typical |
| Package KT Thermal Resistance (RJA) | 174 C/W | On 1-layer PCB |
| Package OK Thermal Resistance (RJA) | 177 C/W | On 1-layer PCB |
| ESD Rating (HBM) | 12 kV (ACS70310), 8 kV (ACS70311) | Per JEDEC JS-001 |
| ESD Rating (CDM) | 1 kV | Per JEDEC JS-002 |
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