PIC24FV16KM204 FAMILY
DS33030A-page 224
Advance Information
2013 Microchip Technology Inc.
19.3
Transfer Function
The transfer functions of the A/D Converter in 12-bit
resolution are shown in
. The difference of
the input voltages (V
INH
– V
INL
) is compared to the
reference ((V
R
+) – (V
R
-)).
• The first code transition occurs when the input
voltage is ((V
R
+) – (V
R
-))/4096 or 1.0 LSb.
• The ‘
0000 0000 0001
’ code is centered at
V
R
- + (1.5 * ((V
R
+) – (V
R
-))/4096).
• The ‘
0010 0000 0000
’ code is centered at
V
REFL
+ (2048.5 * ((V
R
+) – (V
R
-))/4096).
• An input voltage less than
V
R
- + (((V
R
-) – (V
R
-))/4096) converts as
‘
0000 0000 0000
’.
• An input voltage greater than
(V
R
-) + (4095 ((V
R
+) – (V
R
-))/4096) converts as
‘
1111 1111 1111
’.
FIGURE 19-3:
12-BIT A/D TRANSFER FUNCTION
0010 0000 0001
(2049)
0010 0000 0010
(2050)
0010 0000 0011
(2051)
0001 1111 1101
(2045)
0001 1111 1110
(2046)
0001 1111 1111
(2047)
1111 1111 1110
(4094)
1111 1111 1111
(4095)
0000 0000 0000
(0)
0000 0000 0001
(1)
Output Code
0010 0000 0000
(2048)
(V
IN
H
– V
IN
L
)
V
R-
V
R+
– V
R-
4
096
20
48 *
(
V
R+
– V
R-
)
4
096
V
R+
V
R-
+
V
R-
+
4
095
*
(V
R+
– V
R-
)
4
096
V
R-
+
0
(Binary (Decimal))
Voltage Level
Summary of Contents for PIC24FV16KM204 FAMILY
Page 312: ...PIC24FV16KM204 FAMILY DS33030A page 312 Advance Information 2013 Microchip Technology Inc ...
Page 313: ... 2013 Microchip Technology Inc Advance Information DS33030A page 313 PIC24FV16KM204 FAMILY ...
Page 315: ... 2013 Microchip Technology Inc Advance Information DS33030A page 315 PIC24FV16KM204 FAMILY ...
Page 316: ...PIC24FV16KM204 FAMILY DS33030A page 316 Advance Information 2013 Microchip Technology Inc ...
Page 317: ... 2013 Microchip Technology Inc Advance Information DS33030A page 317 PIC24FV16KM204 FAMILY ...
Page 322: ...PIC24FV16KM204 FAMILY DS33030A page 322 Advance Information 2013 Microchip Technology Inc ...