DSPIC33FJ12MC202 Microchip Technology Inc., DSPIC33FJ12MC202 Datasheet - Page 203

• Manufacturer Part Number: DSPIC33FJ12MC202
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

EQUATION 19-1:
FIGURE 19-2:
FIGURE 19-3:
© 2007 Microchip Technology Inc.
11 1111 1111 (= 1023)
11 1111 1110 (= 1022)
10 0000 0011 (= 515)
10 0000 0010 (= 514)
10 0000 0001 (= 513)
10 0000 0000 (= 512)
01 1111 1111 (= 511)
01 1111 1110 (= 510)
01 1111 1101 (= 509)
00 0000 0001 (= 1)
00 0000 0000 (= 0)
Note:
T
OSC
Output Code
(1)
ADC Internal
RC Clock
Refer to Figure 7-2 for the derivation of F
to the clock frequency. T
ADC CONVERSION CLOCK PERIOD
ADC TRANSFER FUNCTION (10-BIT EXAMPLE)
ADC CONVERSION CLOCK PERIOD BLOCK DIAGRAM
X
2
V
REFL
T
V
CY
REFL
OSC
+
V
= 1/F
REFH
1024
OSC
– V
T
ADCS =
AD
REFL
ADxCON3<5:0>
ADC Conversion
Clock Multiplier
1, 2, 3, 4, 5,..., 64
.
Preliminary
= T
OSC
6
dsPIC33FJ12MC201/202
CY
when the PLL is enabled. If the PLL is not used, F
V
T
T
REFL
(ADCS + 1)
CY
AD
+
– 1
512 * (V
REFH
1024
– V
REFL
)
V
REFL
ADxCON3<15>
+
0
1
1023 * (V
REFH
1024
DS70265B-page 201
T
OSC
AD
– V
(V
is equal
INH
REFL
– V
)
V
INL
REFH
)