PIC24FV16KM204 Datasheet, PDF (224/336 Pages) Microchip Technology – General Purpose, 16-Bit Flash Microcontroller with XLP Technology Data Sheet

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19.3 Transfer Function
The transfer functions of the A/D Converter in 12-bit
resolution are shown in Figure 19-3. The difference of
the input voltages (VINH – VINL) is compared to the
reference ((VR+) – (VR-)).
• The first code transition occurs when the input
voltage is ((VR+) – (VR-))/4096 or 1.0 LSb.
• The ‘0000 0000 0001’ code is centered at
VR- + (1.5 * ((VR+) – (VR-))/4096).
• The ‘0010 0000 0000’ code is centered at
VREFL + (2048.5 * ((VR+) – (VR-))/4096).
• An input voltage less than
VR- + (((VR-) – (VR-))/4096) converts as
‘0000 0000 0000’.
• An input voltage greater than
(VR-) + (4095 ((VR+) – (VR-))/4096) converts as
‘1111 1111 1111’.
FIGURE 19-3:
12-BIT A/D TRANSFER FUNCTION
Output Code
(Binary (Decimal))
1111 1111 1111 (4095)
1111 1111 1110 (4094)
0010 0000 0011 (2051)
0010 0000 0010 (2050)
0010 0000 0001 (2049)
0010 0000 0000 (2048)
0001 1111 1111 (2047)
0001 1111 1110 (2046)
0001 1111 1101 (2045)
0000 0000 0001 (1)
0000 0000 0000 (0)
Voltage Level
DS33030A-page 224
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