PIC16F819-I/SOTSL Microchip Technology, PIC16F819-I/SOTSL Datasheet - Page 453
![IC PIC MCU FLASH 2KX14 18SOIC](/photos/6/76/67656/150-18-soic_sml.jpg)
PIC16F819-I/SOTSL
Manufacturer Part Number
PIC16F819-I/SOTSL
Description
IC PIC MCU FLASH 2KX14 18SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F818-ISO.pdf
(176 pages)
4.PIC16F818-ISO.pdf
(6 pages)
5.PIC16F818-ISO.pdf
(8 pages)
6.PIC16F818-ISO.pdf
(8 pages)
Specifications of PIC16F819-I/SOTSL
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
18-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F818-ISO PDF datasheet #3
- PIC16F818-ISO PDF datasheet #4
- PIC16F818-ISO PDF datasheet #5
- PIC16F818-ISO PDF datasheet #6
- Current page: 453 of 688
- Download datasheet (3Mb)
Resolution
.
Slope A/D
1997 Microchip Technology Inc.
(Bits)
16
14
12
10
Conversion
Time (ms)
16.384
4.096
1.024
0.256
The selection of the external capacitor is determined by the desired characteristics of the appli-
cation. These include
• Input Voltage Range (widest range of all input channels)
• Conversion Time
• Programmable Current Source Output Values
The selection of these values should be done to minimize the time between a comparator trip
(ADCIF bit is set) to the ADTMR overflow (OVFIF is set). This ensures that the entire range of
the ADTMR is used for the A/D conversion process.
The equation for selecting the ramp capacitor value is:
Table 24-2
time, and full scale voltage measurement.
This capacitor on the CDAC pin should have a low voltage-coefficient as found in teflon, polypro-
pylene, or polystyrene capacitors, for optimum results. This external capacitor must be dis-
charged at the beginning of each conversion cycle by setting the ADRST bit (ADCON0<1>). The
time for the ADRST bit to be set depends on the characteristics of the external capacitor for a
complete discharge.
Table 24-2: External Capacitor Selection (@ 4 MHz)
Capacitor = (conversion time in seconds) X
(Volts)
Scale
Full
3.5
2.0
1.5
3.5
2.0
1.5
3.5
2.0
1.5
3.5
2.0
1.5
provides example capacitor values for the desired Slope A/D resolution, conversion
(current source output in amps) / (full scale in volts)
ADDAC3:ADDC0
Slope A/D Current Source Select
1100
1010
1011
1101
1011
1100
1101
1001
1010
1011
1010
1011
Section 24. Slope A/D
Typical Output
( amps)
24.75
29.25
24.75
29.25
20.25
24.75
24.75
22.5
22.5
22.5
27
27
Calculated
Capacitor
0.126 F
0.184 F
0.270 F
50.7 nF
73.7 nF
8.56 nF
10.4 nF
15.4 nF
1.81 nF
2.88 nF
4.22 nF
CDAC
34 nF
DS31024A-page 24-11
Nearest Standard
CDAC Capacitor
0.12 F
0.18 F
0.27 F
8.2 nF
1.8 nF
2.7 nF
3.9 nF
Value
33 nF
47 nF
68 nF
10 nF
15 nF
24
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