DSPIC33FJ32MC202 Datasheet, PDF (208/292 Pages) Microchip Technology – High-Performance, 16-bit Microcontrollers

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304
EQUATION 19-1: ADC CONVERSION CLOCK PERIOD
TAD = TCY(ADCS + 1)
ADCS =
TAD
TCY
–1
FIGURE 19-3:
ADC TRANSFER FUNCTION (10-BIT EXAMPLE)
Output Code
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)
VREFL _{VREFL + VREFH – VREFL}
1024
512 * (VREFH – VREFL)
VREFL +
1024
VREFL + ^{1023 * (VREFH – VREFL) VREFH}
1024
(VINH – VINL)
FIGURE 19-4:
ADC CONVERSION CLOCK PERIOD BLOCK DIAGRAM
AD1CON3<15>
ADC Internal
RC Clock
TOSC⁽¹⁾
X2
TCY
AD1CON3<5:0>
6
ADC Conversion
Clock Multiplier
1, 2, 3, 4, 5,..., 64
0
TAD
1
Note:
Refer to Figure 7-2 for the derivation of FOSC when the PLL is enabled. If the PLL is not used, FOSC is equal
to the clock frequency. TOSC = 1/FOSC.
DS70283B-page 206
Preliminary
© 2007 Microchip Technology Inc.