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PIC18F4550ESOSQTP Datasheet(PDF) 407 Page - Microchip Technology

Part # PIC18F4550ESOSQTP
Description  28/40/44-Pin, High-Performance, Enhanced Flash, USB Microcontrollerswith nanoWatt Technology
PDF  438 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F4550ESOSQTP Datasheet(HTML) 407 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS39632E-page 405
PIC18F2455/2550/4455/4550
TABLE 28-29: A/D CONVERSION REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Max
Units
Conditions
130
TAD
A/D Clock Period
PIC18FXXXX
0.8
25.0(1)
μsTOSC based, VREF ≥ 3.0V
PIC18LFXXXX
1.4
25.0(1)
μsVDD = 2.0V,
TOSC based, VREF full range
PIC18FXXXX
—
1
μs
A/D RC mode
PIC18LFXXXX
—
3
μsVDD = 2.0V,
A/D RC mode
131
TCNV
Conversion Time
(not including acquisition time)(2)
11
12
TAD
132
TACQ
Acquisition Time(3)
1.4
—
μs-40°C to +85°C
135
TSWC
Switching Time from Convert
→ Sample
—
(Note 4)
137
TDIS
Discharge Time
0.2
—
μs
Note 1: The time of the A/D clock period is dependent on the device frequency and the TAD clock divider.
2: ADRES registers may be read on the following TCY cycle.
3: The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (VSS to VDD). The source impedance (RS) on the input channels is 50
Ω.
4: On the following cycle of the device clock.



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