Si4355
Figure 3. Capacitor Bank Frequency Offset Characteristics
3.6. Battery Voltage and Auxiliary ADC
The Si4355 contains an integrated auxiliary 11-bit ADC used for the internal battery voltage detector or an external
component via GPIO. The Effective Number of Bits (ENOB) is 9 bits. When measuring external components, the
input voltage range is 1 V, and the conversion rate is between 300 Hz to 2.44 kHz. The ADC value is read by first
sending the GET_ADC_READING command and enabling the desired inputs. When the conversion is finished and
all the data is ready, CTS will go high, and the data can be read out. Refer to application note, “AN691: EZRadio
API Guide”, for details on this command and the formulas needed to interpret the results.
14
Rev 1.0
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相关代理商/技术参数
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