PIC18F4550-I/PT Microchip Technology Inc., PIC18F4550-I/PT Datasheet - Page 400

• Manufacturer Part Number: PIC18F4550-I/PT
• Description: 44 PIN, 32 KB FLASH, 2048 RAM, FS-USB 2.0
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4550-I/PT

• A/d Inputs: 13-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 34
• Interface: I2C/SPI/UART/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC18F2455/2550/4455/4550
TABLE 28-29: A/D CONVERSION REQUIREMENTS
DS39632C-page 398
130
131
132
135
137
Legend: TBD = To Be Determined
Note 1:
Param
No.
2:
3:
4:
T
T
T
T
T
Symbol
AD
CNV
ACQ
SWC
DIS
The time of the A/D clock period is dependent on the device frequency and the T
ADRES registers may be read on the following T
The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (V
On the following cycle of the device clock.
A/D Clock Period
Conversion Time
(not including acquisition time)
Acquisition Time
Switching Time from Convert
Discharge Time
Characteristic
DD
(3)
to V
SS
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
or V
SS
(2)
Preliminary
Sample
to V
DD
). The source impedance ( R
CY
cycle.
TBD
TBD
TBD
Min
0.7
1.4
1.4
0.2
11
—
(Note 4)
25.0
25.0
Max
12
—
—
—
1
3
(1)
(1)
Units
T
AD
s
s
s
s
s
s
s
S
© 2006 Microchip Technology Inc.
) on the input channels is 50 .
T
V
T
A/D RC mode
V
A/D RC mode
-40 C to +85 C
0 C
OSC
OSC
DD
DD
AD
= 2.0V,
= 2.0V,
based, V
based, V
clock divider.
to
Conditions
+85 C
REF
REF
full range
3.0V