pic24hj12gp202 Microchip Technology Inc., pic24hj12gp202 Datasheet - Page 155

• Manufacturer Part Number: pic24hj12gp202
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

EQUATION 17-1:
FIGURE 17-2:
FIGURE 17-3:
© 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 (1)
Output Code
ADC Internal
RC Clock
Refer to Figure 7-2 for the derivation of Fosc when the PLL is enabled. If the PLL is not used, F
the clock source 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
REFH
1024
= 1/F
– V
T
ADCS =
AD
REFL
AD1CON3<5:0>
ADC Conversion
Clock Multiplier
1, 2, 3, 4, 5,..., 64
OSC
Preliminary
= T
.
6
CY
V
T
T
REFL
(ADCS + 1)
CY
AD
PIC24HJ12GP201/202
+
– 1
512 * (V
REFH
1024
– V
REFL
)
V
REFL
AD1CON3<15>
+
0
1
1023 * (V
REFH
1024
DS70282B-page 153
T
AD
OSC
– V
(V
INH
is equal to
REFL
– V
)
V
INL
REFH
)