Datasheet

© 2009 Microchip Technology Inc. DS41341E-page 231
PIC16F72X/PIC16LF72X
TABLE 23-8: PIC16F72X A/D CONVERSION REQUIREMENTS
FIGURE 23-12: PIC16F72X A/D CONVERSION TIMING (NORMAL MODE)
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ T
A ≤ +125°C
Param
No.
Sym. Characteristic Min. Typ† Max. Units Conditions
AD130* T
AD A/D Clock Period 1.0 — 9.0 μsTOSC-based
A/D Internal RC Oscillator
Period
1.0 2.0 6.0 μs ADCS<1:0> = 11 (ADRC mode)
AD131 T
CNV Conversion Time (not including
Acquisition Time)
(1)
—10.5—TAD Set GO/DONE bit to conversion
complete
AD132* T
ACQ Acquisition Time — 1.0 — μs
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: The ADRES register may be read on the following T
CY cycle.
AD131
AD130
BSF ADCON0, GO
Q4
A/D CLK
A/D Data
ADRES
ADIF
GO
Sample
OLD_DATA
Sampling Stopped
DONE
NEW_DATA
765 3210
Note 1: If the A/D clock source is selected as RC, a time of T
CY is added before the A/D clock starts. This allows the
SLEEP instruction to be executed.
1 TCY
4
AD134
(TOSC/2
(1)
)
1 TCY
AD132