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PIC16F74-E/SS Datasheet(PDF) 141 Page - Microchip Technology

Part # PIC16F74-E/SS
Description  28/40-pin, 8-bit CMOS FLASH Microcontrollers
PDF  174 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F74-E/SS Datasheet(HTML) 141 Page - Microchip Technology

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 2002 Microchip Technology Inc.
DS30325B-page 139
PIC16F7X
FIGURE 15-19:
A/D CONVERSION TIMING
TABLE 15-13: A/D CONVERSION REQUIREMENTS
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(TOSC/2)(1)
7
6
5
432
1
0
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the SLEEP instruction
to be executed.
1 TCY
134
Param
No.
Sym
Characteristic
Min
Typ†
Max
Units
Conditions
130
TAD
A/D clock period
PIC16F7X
1.6
——
µsTOSC based, VREF ≥ 3.0V
PIC16LF7X
2.0
——
µsTOSC based,
2.0V
≤ VREF ≤ 5.5V
PIC16F7X
2.0
4.0
6.0
µs A/D RC mode
PIC16LF7X
3.0
6.0
9.0
µs A/D RC mode
131
TCNV Conversion time (not including
S/H time) (Note 1)
9
—
9TAD
132
TACQ Acquisition time
5*
——
µs 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 CHOLD).
134
TGO
Q4 to A/D clock start
—
TOSC/2
——
If the A/D clock source is
selected as RC, a time of TCY
is added before the A/D clock
starts. This allows the SLEEP
instruction to be executed.
*
These parameters are characterized but not tested.
†
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 TCY cycle.
2: See Section 11.1 for minimum conditions.



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