AirPrime Technical Specification and User-manual-3113303

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Product Technical Specification Detailed Interface Specifications
3.12. Analog to Digital Converter (ADC1)
One Analog to Digital Converter input, ADC1, is provided by the AirPrime HL7688 module. This
converter is a 10-bit resolution ADC ranging from 0 to 1.2V.
The following table describes the pad description of the ADC interface.
Table 20. ADC Interface Pad Description
Pad Number Signal Name I/O Description
24 ADC1 I Analog to digital converter
Typical ADC1 use is for monitoring external voltage; wherein an application is used to safely power
OFF an external supply in case of overvoltage.
Table 21. ADC Electrical Characteristics
Parameter Minimum Typical Maximum Remarks
ADC1 Resolution (bits) - 10 -
Input Voltage Range (V) 0 - 1.2 General purpose input
Update rate per channel (kHz) - - 125
Integral Nonlinearity (bits) - - ±2 LSB
Offset Error (bits) - - ±1 LSB
Gain 849 853 858
Input Resistance (MΩ) 1 - -
Input Capacitance (pF) - 1 -
3.13. Clock Interface
The AirPrime HL7688 module supports two digital clock interfaces.
The following table describes the pad description of the clock out interfaces.
Table 22. Clock Interface Pad Description
Pad Number Signal Name I/O I/O Type Description
22 26M_CLKOUT O 1.8V 26MHz Digital Clock output
23 32K_CLKOUT O 1.8V 32.768kHz Digital Clock output
Enabling or disabling the clock out feature can be done using AT commands. For more information
about AT commands, refer to document [2] AirPrime HL7688 AT Commands Interface Guide.