PIC18F242 MICROCHIP [Microchip Technology], PIC18F242 Datasheet - Page 289

• Manufacturer Part Number: PIC18F242
• Description: 28/40-pin High Performance, Enhanced FLASH Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

TABLE 22-21: A/D CONVERTER CHARACTERISTICS: PIC18FXX2 (INDUSTRIAL, EXTENDED)
FIGURE 22-22:
© 2006 Microchip Technology Inc.
A01
A03
A04
A05
A06
A10
A20
A20A
A21
A22
A25
A30
A50
Param
No.
Note 1: Vss
Note 1: If the A/D clock source is selected as RC, a time of T
A/D DATA
SAMPLE
N
E
E
E
E
—
V
V
V
V
Z
I
A/D CLK
Symbol
REF
2: The A/D conversion result never decreases with an increase in the Input Voltage, and has no missing codes.
3: For V
4: Maximum allowed impedance for analog voltage source is 10 k . This requires higher acquisition times.
ADRES
2: This is a minimal RC delay (typically 100 nS), which also disconnects the holding capacitor from the analog input.
AIN
REF
REFH
REFL
AIN
R
IL
DL
G
OFF
BSF ADCON0, GO
ADIF
This allows the SLEEP instruction to be executed.
GO
Q4
Resolution
Integral linearity error
Differential linearity error
Gain error
Offset error
Monotonicity
Reference Voltage
(V
Reference voltage High
Reference voltage Low
Analog input voltage
Recommended impedance of
analog voltage source
V
DD
V
REF
REFH
AIN
132
< 2.5V, V
A/D CONVERSION TIMING
input current (Note 1)
Characteristic
– V
V
REF
REFL
AIN
(Note 2)
)
should be limited to < .5 V
9
8
OLD_DATA
AV
AV
7
SS
SS
AV
1.8V
Min
3V
—
—
—
—
—
—
—
—
CY
– 0.3V
– 0.3V
SS
is added before the A/D clock starts.
. . .
SAMPLING STOPPED
DD
guaranteed
.
. . .
Typ
131
130
—
—
—
—
—
—
—
—
—
—
—
—
—
PIC18LFXX2 (INDUSTRIAL)
(2)
AV
AV
2
DD
DD
V
<±1.5
Max
<±1
<±1
<±1
150
REFH
2.5
10
—
—
5
+ 0.3V
+ 0.3V
1
Units
LSb V
LSb V
LSb V
LSb V
k
bit
—
V
V
V
V
V
A
A
0
PIC18FXX2
V
V
V
V
(Note 4)
During V
During A/D conversion cycle
REF
REF
REF
REF
SS
DD
DD
DD
< 3.0V
= V
= V
= V
= V
NEW_DATA
DONE
V
3.0V
2.5V (Note 3)
AIN
DS39564C-page 287
Conditions
AIN
DD
DD
DD
DD
T
= 5.0V
= 5.0V
= 5.0V
= 5.0V
acquisition
CY
V
REF