Products Overview
ACS71240 Automotive Current Sensor ICs
Allegro MicroSystems
Allegro ACS71240 Automotive Galvanically Isolated Current Sensor ICs offer next-generation improvements over the ACS711 Current Sensor ICs.
The ACS71240 features output signal immunity to stray magnetic fields (created by adjacent motors or current-carrying wires), improved output signal accuracy (±1.5% typical), and output signal immunity to noisy supply voltage rails. In addition, the device has a dedicated fast overcurrent fault output that has a typical response time of 1.5us. The fast fault output employs a simple means of detecting short circuit events to prevent MOSFET or IGBT damage in an inverter, motor, or other switching power electronics applications.
The ACS71240 Automotive Galvanically Isolated Current Sensor ICs are designed to replace shunt resistors, operational amplifiers, current transformers, and voltage isolators in applications that require a small form factor.
The ACS71240 is available in two minimal form factor package options, each providing different levels of galvanic isolation. The tiny 3mm x 3mm, wettable flank QFN package can be used on voltage rails up to 120VDC and enables solder joint inspection required in zero PPM automotive applications. The standard footprint SOIC8 package is UL certified to 2400VRMS of isolation and delivers a working voltage of 420VDC or 297VRMS.
The sensors support use on 5V or 3.3V power supplies.
| Part Number | Number of Channels | Frequency | Linearity | Accuracy | Response Time | Sensitivity | Current - Sensing | Operating Temperature | Current - Supply | Package Type |
|---|---|---|---|---|---|---|---|---|---|---|
| ACS71240KEXBLT-010B3 | Analog | 120 kHz | ±1% | ±6% | 4µs | 132mV/A | 10A | -40 °C ~ 125 °C(TA) | 3.3 V | 12-lead QFN (3x3) |
| ACS71240KEXBLT-010B3-115 | Analog | 120 kHz | ±1% | ±6% | 4µs | 132mV/A | 10A | -40 °C ~ 125 °C(TA) | 3.3 V | 12-lead QFN (3x3) |
| ACS71240KEXBLT-030B3 | Analog | 120 kHz | ±1% | ±6% | 4µs | 44mV/A | 30A | -40 °C ~ 125 °C(TA) | 3.3 V | 12-lead QFN (3x3) |
| ACS71240KEXBLT-050U5 | Analog | 120 kHz | ±1% | ±6% | 4µs | 80mV/A | 50A | -40 °C ~ 125 °C(TA) | 5V | 12-lead QFN (3x3) |
| ACS71240LLCBTR-010B3 | Analog | 120 kHz | ±1% | ±6% | 4µs | 132mV/A | 10A | -40 °C ~ 150 °C(TA) | 3.3V | 8-lead SOIC |
| ACS71240LLCBTR-030B3 | Analog | 120 kHz | ±1% | ±6% | 4µs | 44mV/A | 30A | -40 °C ~ 150 °C(TA) | 3.3V | 8-lead SOIC |
| ACS71240LLCBTR-045B53 | Analog | 120 kHz | ±1% | ±6% | 4µs | 44.4mV/A | 45A | -40 °C ~ 150 °C(TA) | 5V | 8-lead SOIC |
| ACS71240LLCBTR-050U5 | Analog | 120 kHz | ±1% | ±6% | 4µs | 80mV/A | 50A | -40 °C ~ 150 °C(TA) | 5V | 8-lead SOIC |
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Datasheet Download on Sep, 2022
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