PIC16F83-10/P Microchip Technology, PIC16F83-10/P Datasheet - Page 408
PIC16F83-10/P
Manufacturer Part Number
PIC16F83-10/P
Description
IC MCU FLASH 512X14 EE 18DIP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC16LF84A-04P.pdf
(125 pages)
3.PIC16LF83-04P.pdf
(4 pages)
Specifications of PIC16F83-10/P
Core Size
8-Bit
Program Memory Size
896B (512 x 14)
Core Processor
PIC
Speed
10MHz
Peripherals
POR, WDT
Number Of I /o
13
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
36 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
18-DIP (0.300", 7.62mm)
Controller Family/series
PIC16F
No. Of I/o's
13
Eeprom Memory Size
64Byte
Ram Memory Size
36Byte
Cpu Speed
10MHz
No. Of Timers
1
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Connectivity
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
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PICmicro MID-RANGE MCU FAMILY
22.3
DS31022A-page 22-6
A/D Acquisition Requirements
For the A/D converter to meet its specified accuracy, the charge holding capacitor (C
be allowed to fully charge to the input channel voltage level. The analog input model is shown in
Figure
directly affect the time required to charge the capacitor C
ance varies over the device voltage (V
impedance for analog sources is 10 k . After the analog input channel is selected (changed)
this acquisition must be done before the conversion can be started.
To calculate the minimum acquisition time,
that 1/2 LSb error is used (512 steps for the A/D). The 1/2 LSb error is the maximum error allowed
for the A/D to meet its specified resolution.
Equation 22-1:Acquisition Time
Equation 22-2:A/D Minimum Charging Time
Example 22-1
lation is based on the following system assumptions.
Rs
Conversion Error
V
Temperature
V
Example 22-1:
T
V
or
Tc
T
T
T
T
DD
HOLD
ACQ
ACQ
ACQ
C
ACQ
HOLD
=
22-3. The source impedance (R
=
=
=
=
=
=
=
Amplifier Settling Time +
Holding Capacitor Charging Time +
Temperature Coefficient
T
T
5 s + Tc + [(Temp - 25 C)(0.05 s/ C)]
-C
-51.2 pF (1 k + 7 k + 10 k ) ln(0.0020)
-51.2 pF (18 k ) ln(0.0020)
-0.921 s (-6.2146)
5.724 s
5 s + 5.724 s + [(50 C - 25 C)(0.05 s/ C)]
10.724 s + 1.25 s
11.974 s
(V
-(51.2 pF)(1 k + R
shows the calculation of the minimum required acquisition time T
AMP
AMP
HOLD
REF
Calculating the Minimum Required Acquisition Time
+ T
+ T
- (V
(R
=
=
=
=
C
C
IC
REF
+ T
+ T
+ R
/512)) • (1 - e
COFF
COFF
10 k
1/2 LSb
5V
50 C (system max.)
0V @ time = 0
SS
+ R
SS
Rss = 7 k
+ R
S
) ln(1/512)
S
DD
) and the internal sampling switch (R
S
) ln(1/511)
(-Tc/C
Equation 22-1
), see
HOLD
Figure
(R
IC
HOLD
(see graph in
+ R
22-3. The maximum recommended
may be used. This equation assumes
SS
. The sampling switch (R
+ R
S
))
1997 Microchip Technology Inc.
)
Figure
22-3)
ACQ
SS
) impedance
. This calcu-
HOLD
SS
) imped-
) must
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