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QN9020 ADC Configuration for Battery Monitor

Question asked by Hanson He Employee on May 18, 2017
Latest reply on Jun 26, 2017 by Gerardo Rodríguez


We want to evaluate the battery monitor function, but we do not see description in detailed.

1. For below description, if battery voltage is 3.6v, whether battery power could connect to ADC input directly, and chip will detect 3.6/4 voltage, no need external divide voltage? We see the battery monitor could detect voltage range from 2.4v to 3.6v.
9.5.6 Battery monitor
A battery monitor is integrated by connecting supply voltage (VDD / 4) to the ADC input. It uses the internal regulated reference for conversion.

2. BLE will work in deep sleep mode, and power consumption is about 2uA, if connnect ADC to Vbat, and do not open the battery monitor function, whether it will add power consumption? What is the power consumption for the ADC module, we do not see the info from datasheet.