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C8051F040-GQR Datasheet(PDF) 61 Page - Silicon Laboratories |
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C8051F040-GQR Datasheet(HTML) 61 Page - Silicon Laboratories |
61 / 328 page ![]() C8051F040/1/2/3/4/5/6/7 Rev. 1.5 61 Figure 5.7. ADC0 Data Word Example 12-bit ADC0 Data Word appears in the ADC0 Data Word Registers as follows: ADC0H[3:0]:ADC0L[7:0], if AD0LJST = 0 (ADC0H[7:4] will be sign-extension of ADC0H.3 for a differential reading, otherwise = 0000b). ADC0H[7:0]:ADC0L[7:4], if AD0LJST = 1 (ADC0L[3:0] = 0000b). Example: ADC0 Data Word Conversion Map, AIN0 Input in Single-Ended Mode (AMX0CF = 0x00, AMX0SL = 0x00) Example: ADC0 Data Word Conversion Map, AIN0-AIN1 Differential Input Pair (AMX0CF = 0x01, AMX0SL = 0x00) For AD0LJST = 0: ; ‘n’ = 12 for Single-Ended; ‘n’=11 for Differential. AIN0-AGND (Volts) ADC0H:ADC0L (AD0LJST = 0) ADC0H:ADC0L (AD0LJST = 1) VREF * (4095/4096) 0x0FFF 0xFFF0 VREF / 2 0x0800 0x8000 VREF * (2047/4096) 0x07FF 0x7FF0 0 0x0000 0x0000 AIN0-AGND (Volts) ADC0H:ADC0L (AD0LJST = 0) ADC0H:ADC0L (AD0LJST = 1) VREF * (2047/2048) 0x07FF 0x7FF0 VREF / 2 0x0400 0x4000 VREF * (1/2048) 0x0001 0x0010 0 0x0000 0x0000 -VREF * (1/2048) 0xFFFF (-1d) 0xFFF0 -VREF / 2 0xFC00 (-1024d) 0xC000 -VREF 0xF800 (-2048d) 0x8000 Code Vin Gain VREF --------------- 2n = |
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