Datasheet ACS37612 (Allegro) - 14

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Coreless, High Precision, Hall-Effect Current Sensor IC ACS37612 with Common-Mode Field Rejection and High Bandwidth (240 kHz) Power-On Reset (POR); Undervoltage Lockout (UVLO) Disabled – Nominal Supply Voltage = 3.3 V Power-Up VCC drops below VCC(min) = 3 V
At power-up, as V If V CC ramps up, the output is in a high-impedance CC drops below VPORH [5’] but remains higher than VPORL state. When V [6’], the output will continue to be V CC crosses VPORH (location [1] in Figure 12 and CC /2. [1’] in Figure 13), the POR Release counter starts counting for t
Power-Down
PORR [2], [2’] and the output will go to VCC / 2 after tPORD [3], [3’]. The temperature compensation engine will then adjust the As VCC ramps down below VPORL [5],[7’], the output will enter a device Sensitivity and QVO after time tTC [4], [4’]. high-impedance state. V 3 CC 1 2 4 5 3.3 VPORH VPORL GND Time VOUT tTC tPORD 1.65 tPORR Slope = VCC / 2 GND High Impedance High Impedance Time
Figure 12: POR and UVLO Operation – Slow Rise Time Case – 3.3 V Mode
1’ V 3’ CC 2’ 4’ 5’ 6’ 7’ 3.3 VPORH VPORL GND Time tTC VOUT tPORD Slope = Slope = VCC / 2 VCC / 2 1.65 High Impedance GND tPORR High Impedance Time
Figure 13: POR and UVLO Operation – Fast Rise Time Case – 3.3 V Mode
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