ALLEGRO ACS70311LKTATN-2P5B5-C

The Allegro ACS70310/1 IC incorporates a Hall element with BiCMOS integrated circuitry to provide a fully monolithic linear current sensor IC. The IC is sensitive to magnetic flux density orthogonal to the IC package surface and the output is an analog voltage proportional to the applied flux density. The ACS70310/1 is designed to be used in conjunction with a ferromagnetic core to provide highly accurate current sensing. The gain and offset drift over temperature is factory-programmed at Allegro and delivers a solution with ±1% sensitivity error and ±5 mV offset error from 25℃ to 150℃. The ACS70310/1 is customer programmable. The absolute value of gain and offset can be programmed after manufacturing to provide customers with industry-leading current sensing accuracy. The sensor has a high operating bandwidth from DC to 240 kHz and a fast 2 μs response time. The ACS70310/1 is ideal for use in high-frequency automotive inverters and DC/DC converters where fast switching is required. The ACS70311 offers all the features of the ACS70310 with the addition of undervoltage detection (UVD) as well as low-voltage programming that eliminates the need for voltages greater than VCC during user programming. The ACS70311 is backward-compatible to the ACS70310, making it a drop-in replacement. Broken ground wire detection, clamps, power-on reset, and under/ overvoltage detection provide the required diagnostics for automotive applications. The on-board supply regulator enables the VCC pin to survive voltages of ±18 V and the VOUT pin to survive voltages of +16 to -6 V for added robustness in the harsh automotive environment. Device parameters are specified across an extended ambient automotive temperature range: -40℃ to 150℃. The ACS70310/1 sensor IC is provided in an extremely thin case (1 mm thick), 4-pin SIP (single in-line package, suffix KT). The KT package is available in straight leads (suffix TN) as well as lead-formed option (suffix TH), enabling surface mount assembly and a high tolerance to mechanical vibrations. The ACS70311 is also available in a 4-pin SIP (suffix OK) package offering longer and thicker leads compared to the KT package, making it an ideal choice for current sensing modules. The OK package is available in straight leads (suffix TN) as well as lead-formed option (suffix TX). Both packages are lead (Pb) free, with 100% matte tin leadframe plating.

• Factory-programmed segmented linear temperature compensation (TC) provides ultralow thermal drift
• Sensitivity Error ±1%
• Offset Error ±5 mV
• On-board supply regulator with reverse-battery protection provides high immunity to Electrical Overstress (EOS)
• Very fast response time (2 μs)
• High operating bandwidth: DC to 240 kHz
• AEC-Q100 Grade 0, automotive qualified
• Customer-programmable, high-resolution offset, and sensitivity trim
• Extremely low noise and high resolution achieved via proprietary Hall element and low-noise amplifier circuits
• Patented circuits suppress IC output spiking during fast current step inputs
• Wide selectable sensitivity range between 0.5 and 11.5 mV/G
• User-selectable ratiometric behavior of sensitivity, quiescent voltage, and clamps (ratiometry can be disabled), for simple interface with application A-to-D converter (ADC)
• Open circuit detection on the GND pin (broken wire)
• Customer-programmable Output Voltage Clamps provide short-circuit diagnostic capabilities
• Undervoltage detection (UVD), ACS70311 only
• Low-voltage programming, ACS70311 only
• Wide ambient temperature range: -40℃ to 150℃
• Immune to mechanical stress
• Extremely thin package: 1 mm case thickness

• High-frequency automotive inverters
• DC/DC converters