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HX711 Datasheet(PDF) 5 Page - Avia Semiconductor Co., Ltd. |
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HX711 Datasheet(HTML) 5 Page - Avia Semiconductor Co., Ltd. |
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5 / 9 page  HX711 AVIA SEMICONDUCTOR V2.0 5 DOUT PD_SCK 1 2 MSB LSB 24 25 Next Conversion：CH.A, Gain:128 Current Output Data Next Output Data 3 4 PD_SCK 1 2 24 25 Next Conversion：CH.B, Gain:32 3 4 26 PD_SCK 1 2 24 25 Next Conversion：CH.A, Gain:64 3 4 26 27 Fig.2 Data output, input and gain selection timing and control T1 T2 T3 T4 One conversion period Symbol Note MIN TYP MAX Unit T1 DOUT falling edge to PD_SCK rising edge 0.1 s T2 PD_SCK rising edge to DOUT data ready 0.1 s T3 PD_SCK high time 0.2 1 50 s T4 PD_SCK low time 0.2 1 s Reset and Power-Down When chip is powered up, on-chip power on rest circuitry will reset the chip. Pin PD_SCK input is used to power down the HX711. When PD_SCK Input is low, chip is in normal working mode. 60 s Power down: PD_SCK Power down Normal Fig.3 Power down control When PD_SCK pin changes from low to high and stays at high for longer than 60s, HX711 enters power down mode (Fig.3). When internal regulator is used for HX711 and the external transducer, both HX711 and the transducer will be powered down. When PD_SCK returns to low, chip will return back to the setup conditions before power down and enter normal operation mode. If PD_SCK pulse number is changed during the current conversion period, power down should be executed after current conversion period is completed. This is to ensure that the change is saved. When chip returns back to normal operation from power down, it will return to the set up conditions of the last change. Application Example Fig.1 is a typical weigh scale application using HX711. It uses on-chip oscillator (XI=0), 10Hz output data rate (RATE=0). A Single power supply （2.7～5.5V） comes directly from MCU power supply. Channel B can be used for battery level detection. The related circuitry is not shown on Fig. 1. |
Número de pieza similar - HX711 |
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Descripción similar - HX711 |
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