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2003 Microchip Technology Inc.
Preliminary
DS41206A-page 105
PIC16F716
FIGURE 12-10:
A/D CONVERSION TIMING
TABLE 12-8:
A/D CONVERSION REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ†
Max
Units
Conditions
130
T
AD
A/D clock period
Industrial
1.6
—
—
µ
s
T
OSC
based, V
REF
≥
3.0V
Industrial
1.6
4.0
6.0
µ
s
A/D RC mode
Extended
1.6
—
—
µ
s
T
OSC
based, V
REF
≥
3.0V
Extended
1.6
6.0
9.0
µ
s
A/D RC mode
131
T
CNV
Conversion time (not including S/H time)
(1)
9.5
—
9.5
T
AD
132
T
ACQ
Acquisition time
(Note 2)
5*
20
—
—
—
µ
s
µ
s
The minimum time is the amplifier
settling time. This may be used if
the "new" input voltage has not
changed by more than 1 LSb (i.e.,
20.0 mV @ 5.12V) from the last
sampled voltage (as stated on
C
HOLD
).
134
T
GO
Q4 to A/D clock start
—
T
OSC
/2 **
—
—
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.
135
T
SWC
Switching from convert
→
sample time
1.5 **
—
—
T
AD
*
These parameters are characterized but not tested.
** This specification ensured by design.
†
Data in “Typ” column is at 5V, 25
°
C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note
1:
ADRES register may be read on the following T
CY
cycle.
2:
See Section 12.1 “DC Characteristics: PIC16F716 (Industrial, Extended)” for min. conditions.
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(T
OSC
/2)
(1)
7
6
5
4
3
2
1
0
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
134
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