saadc increases consumption permanent

Question

Hello I have a question. After when I have used saadc, the consumption increases by 0.9mA. And stays it so. Do you have any idea, how to find out what it does? 
 saadc init: ret_code_t err_code;
	
	// init saadc
	nrf_drv_saadc_config_t saadc_conf;
	
	saadc_conf.resolution = NRF_SAADC_RESOLUTION_10BIT;
	saadc_conf.interrupt_priority = APP_IRQ_PRIORITY_LOWEST;
	saadc_conf.low_power_mode = false;
	saadc_conf.oversample = NRF_SAADC_OVERSAMPLE_32X;
	//saadc_conf.oversample = NRF_SAADC_OVERSAMPLE_DISABLED;
	
	err_code = nrf_drv_saadc_init(&saadc_conf, saadc_event_handler);
	//err_code = nrf_drv_saadc_init(&saadc_conf, NULL);
	APP_ERROR_CHECK(err_code);
	
	// battery voltage channel
	nrf_saadc_channel_config_t batt_channel_conf;
	
	batt_channel_conf.resistor_p = NRF_SAADC_RESISTOR_DISABLED;
	batt_channel_conf.resistor_n = NRF_SAADC_RESISTOR_DISABLED;
	batt_channel_conf.gain = NRF_SAADC_GAIN1_6;
	batt_channel_conf.reference = NRF_SAADC_REFERENCE_INTERNAL;
	batt_channel_conf.acq_time = NRF_SAADC_ACQTIME_3US;
	batt_channel_conf.mode = NRF_SAADC_MODE_SINGLE_ENDED;
	batt_channel_conf.burst = NRF_SAADC_BURST_ENABLED;
	batt_channel_conf.pin_p = NRF_SAADC_INPUT_VDD;
	batt_channel_conf.pin_n = NRF_SAADC_INPUT_DISABLED;
	
	err_code = nrf_drv_saadc_channel_init(0, &batt_channel_conf);
	APP_ERROR_CHECK(err_code);
	
	// motor voltage channel
	nrf_saadc_channel_config_t motor_channel_conf;
	
	motor_channel_conf.resistor_p = NRF_SAADC_RESISTOR_DISABLED;
	motor_channel_conf.resistor_n = NRF_SAADC_RESISTOR_DISABLED;
	motor_channel_conf.gain = NRF_SAADC_GAIN1_2;
	motor_channel_conf.reference = NRF_SAADC_REFERENCE_INTERNAL;
	motor_channel_conf.acq_time = NRF_SAADC_ACQTIME_3US;
	motor_channel_conf.mode = NRF_SAADC_MODE_SINGLE_ENDED;
	motor_channel_conf.burst = NRF_SAADC_BURST_ENABLED;
	motor_channel_conf.pin_p = NRF_SAADC_INPUT_AIN1;
	motor_channel_conf.pin_n = NRF_SAADC_INPUT_DISABLED;
	
	err_code = nrf_drv_saadc_channel_init(1, &motor_channel_conf);
	APP_ERROR_CHECK(err_code);
	
//	err_code = nrf_drv_saadc_buffer_convert(g_saadc_buffer, SAADC_SAMPLES_IN_BUFFER);
//	APP_ERROR_CHECK(err_code);
	
	nrf_saadc_disable(); 
 
 battery voltage measurement: 
 uint16_t GetBatteryVoltageAsInteger(void)
{
	uint32_t result, TempVal;
	//nrf_saadc_value_t temp_adc_val;
	int16_t temp_adc_val;
	
	nrf_saadc_enable();
	g_Flag_saadc_new_value = false;
	
	ret_code_t err_code = nrf_drv_saadc_buffer_convert(g_saadc_buffer, SAADC_SAMPLES_IN_BUFFER);
	APP_ERROR_CHECK(err_code);
	
	nrf_drv_saadc_sample();
	while(!g_Flag_saadc_new_value){};
	//nrf_drv_saadc_sample_convert(0, &temp_adc_val);
	temp_adc_val = g_saadc_buffer[0];
	nrf_saadc_disable();
	
//	temp_adc_val = MeasureBatteryVoltage10bits_buffer();
	
	if(temp_adc_val < 0)
 TempVal = 0;
	else
 TempVal = (uint32_t)temp_adc_val;
	
	result = (uint32_t)(TempVal * 3516) / 1000;
	return (uint16_t)result;
} 
 
 saadc interrupt: 
 void saadc_event_handler(nrf_drv_saadc_evt_t const *p_event)
{
	if(p_event->type == NRF_DRV_SAADC_EVT_DONE)
	{
// ret_code_t err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAADC_SAMPLES_IN_BUFFER);
// APP_ERROR_CHECK(err_code);
 g_Flag_saadc_new_value = true;
	}
}