PIC24FJ16GA MICROCHIP [Microchip Technology], PIC24FJ16GA Datasheet - Page 185

• Manufacturer Part Number: PIC24FJ16GA
• Description: 28/44-Pin General Purpose, 16-Bit Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

20.0
The 10-bit A/D Converter has the following key
features:
• Successive Approximation (SAR) conversion
• Conversion speeds of up to 500 ksps
• Up to 13 analog input pins
• External voltage reference input pins
• Automatic Channel Scan mode
• Selectable conversion trigger source
• 16-word conversion result buffer
• Selectable Buffer Fill modes
• Four result alignment options
• Operation during CPU Sleep and Idle modes
Depending on the particular device pinout, the 10-bit
A/D Converter can have up to three analog input pins,
designated AN0 through AN12. In addition, there are
two analog input pins for external voltage reference
connections. These voltage reference inputs may be
shared with other analog input pins. The actual number
of analog input pins and external voltage reference
input configuration will depend on the specific device.
© 2008 Microchip Technology Inc.
Note:
10-BIT HIGH-SPEED A/D
CONVERTER
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F
”Section 17. 10-Bit A/D Converter”
(DS39705).
Family
Reference
Manual”,
PIC24FJ64GA004 FAMILY
Preliminary
A block diagram of the A/D Converter is shown in
Figure 20-1.
To perform an A/D conversion:
1.
2.
Configure the A/D module:
a)
b)
c)
d)
e)
f)
g)
Configure A/D interrupt (if required):
a)
b)
Select
(AD1PCFG<15:0>).
Select voltage reference source to match
expected
(AD1CON2<15:13>).
Select the analog conversion clock to
match desired data rate with processor
clock (AD1CON3<7:0>).
Select the appropriate sample/conversion
sequence
AD1CON3<12:8>).
Select
presented in the buffer (AD1CON1<9:8>).
Select interrupt rate (AD1CON2<5:2>).
Turn on A/D module (AD1CON1<15>).
Clear the AD1IF bit.
Select A/D interrupt priority.
port
how
range
pins
(AD1CON1<7:5>
conversion
on
as
DS39881C-page 183
analog
analog
results
inputs
inputs
and
are