MIKROE-419 mikroElektronika, MIKROE-419 Datasheet - Page 15

• Manufacturer Part Number: MIKROE-419
• Description: Development Boards & Kits - PIC / DSPIC BIGPIC6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-419

• Rohs: yes
• Product: Development Kits
• Core: PIC
• Interface Type: ICD, IDC10, JTAG, RS-232, USB
• Operating Supply Voltage: 9 V to 32 V
• Data Bus Width: 8 bit
• Description/function: Development Board Only, Touch Screen, Pencil, DS1820, LCD, Serial Cable, GLCD not included
• Dimensions: 265 mm x 220 mm
• For Use With: PIC

BigPIC6 Development System
BigPIC6 Development System
10.0.
10.0. A/D Converter Test Inputs
An A/D converter is used for converting an analog signal into the appropriate digital value. A/D converter is linear, which means that the
converted number is linearly dependent on the input voltage value. The A/D converter within the microcontroller converts an analog
voltage value into a 10-bit number. Voltages varying from 0V to 5V DC may be supplied through the A/D test inputs. Jumper J11 is
used for selecting some of the following pins RA0, RA1, RA2 or RA3 for A/D conversion. The R16 resistor has a protective function
as it is used for limiting current fl ow through the potentiometer or the microcontroller pin. The value of the input analog voltage can be
changed linearly using potentiometer P3.
Figure 10-3: Microcontroller and A/D converter test inputs connection
NOTE:
A/D conversion is performed via
the RA0 microcontroller pin
A/D Converter Test Inputs
In order to enable the microcontroller to accurately perform A/D conversion, it is necessary to turn off LED diodes and
pull-up/pull-down resistors on port pins used by the A/D converter. For higher A/D conversion accuracy use the voltage reference.
Figure 10-1: ADC (jumper in default position)
10K
P3
Top view
VCC
220R
R16
P3
10K
J11
RA0
RA1
RA2
RA3
VCC
RH2
RH3
RE1
RE0
RG0
RG1
RG2
RG3
MCLR
RG4
GND
VCC
RF7
RF6
RF5
RF4
RF3
RF2
RH7
RH6
PIC18Fxx
VCC
Figure 10-2: Pin RA0 used as input pin for
A/D conversion
VCC
OSC2
OSC1
GND
VCC
RC5
RC4
RC3
RC2
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RJ2
RJ3
RJ7
RJ6
VCC
MikroElektronika
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