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Forum Post: ADS1115: Problem when working in single shot mode using 'alert/rdy' pin and input is connected to ground or not connected.

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Part Number: ADS1115 Hi I'm developing my own device which uses ADS1115 . I'm using connection as in the picture below. I configure ADS1115 as follows: adcInitConf.compQue = COMP_QUE_ONE; adcInitConf.compLat = COMP_LAT_ENABLE; adcInitConf.compPol = COMP_POL_HIGH; adcInitConf.compMode = COMP_MODE_WITH_HYSTERESIS; adcInitConf.dr = DR_128_SPS; adcInitConf.mode = MODE_SINGLE_SHOT; adcInitConf.pga = PGA_6_1; adcInitConf.mux = MUX_0_G; adcInitConf.osWrite = OS_WRITE_BEGIN; I'm waiting for 'alert/rdy' pin is high and read value from ADC. It works is well but if ADS1115 input is not connected or connected to ground ADC don't set 'alert/rdy' pin. In this case, I expect to get a zero value. Any ideas? Is any additional information required? Thanks very much,

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