PIC18F8493-I/PT Microchip Technology, PIC18F8493-I/PT Datasheet - Page 36
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PIC18F8493-I/PT
Manufacturer Part Number
PIC18F8493-I/PT
Description
IC PIC MCU FLASH 8KX16 80TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18F6393-IPT.pdf
(62 pages)
2.PIC18F6393-IPT.pdf
(8 pages)
3.PIC18F6393-IPT.pdf
(58 pages)
Specifications of PIC18F8493-I/PT
Core Size
8-Bit
Program Memory Size
16KB (8K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
Number Of I /o
66
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 12x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TFQFP
Controller Family/series
PIC18
No. Of I/o's
66
Ram Memory Size
768Byte
Cpu Speed
40MHz
No. Of Timers
4
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
AUSART, EUSART, I2C, MSSP, SPI
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
66
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164136, DM163030
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DM163030 - KIT DEV PICDEM LCD2XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFP
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F8493-I/PT
Manufacturer:
MAXIM
Quantity:
872
Company:
Part Number:
PIC18F8493-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC18F8493-I/PT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
PIC18F6393/6493/8393/8493
2.1
For the A/D Converter to meet its specified accuracy,
the charge holding capacitor (C
to fully charge to the input channel voltage level. The
analog input model is shown in Figure 2-3. The source
impedance (R
impedance directly affect the time required to charge
the capacitor, C
impedance varies over the device voltage (V
source impedance affects the offset voltage at the ana-
log input (due to pin leakage current). The maximum
recommended impedance for analog sources is
2.5 kΩ. After the analog input channel is selected
(changed), the channel must be sampled for at least
the minimum acquisition time before starting a
conversion.
EQUATION 2-1:
EQUATION 2-2:
EQUATION 2-3:
DS39896A-page 34
T
V
or
T
T
T
T
Temperature coefficient is only required for temperatures > 25°C. Below 25°C, T
T
T
ACQ
Note:
C
ACQ
AMP
COFF
C
ACQ
HOLD
=
=
A/D Acquisition Requirements
=
=
=
=
=
=
=
When the conversion is started, the
holding capacitor is disconnected from the
input pin.
Amplifier Settling Time + Holding Capacitor Charging Time + Temperature Coefficient
T
S
AMP
) and the internal sampling switch (R
T
0.2 µs
(Temp – 25°C)(0.02 µs/°C)
(85°C – 25°C)(0.02 µs/°C)
1.2 µs
-(C
-(25 pF) (1 kΩ + 4 kΩ + 2.5 kΩ) ln(0.0002441) µs
1.56 µs
0.2 µs + 1.56 μs + 1.2 µs
2.96 µs
(V
– (C
AMP
HOLD
HOLD
+ T
REF
HOLD
+ T
C
– (V
. The sampling switch (R
ACQUISITION TIME
A/D MINIMUM CHARGING TIME
CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
+ T
)(R
C
)(R
+ T
REF
COFF
IC
IC
+ R
COFF
/4096)) • (1 – e
+ R
HOLD
SS
SS
+ R
) must be allowed
+ R
S
) ln(1/4096) µs
S
) ln(1/4096)
(-T
C
DD
/C
). The
HOLD
Preliminary
SS
SS
(R
)
)
IC
+ R
SS
+ R
S
To calculate the minimum acquisition time, Equation 2-1
may be used. This equation assumes that 1/2 LSb error
is used (4096 steps for the 12-bit A/D). The 1/2 LSb error
is the maximum error allowed for the A/D to meet its
specified resolution.
Equation 2-3 shows the calculation of the minimum
required acquisition time, T
based
assumptions:
C
Rs
Conversion Error
V
Temperature
))
HOLD
DD
)
on
COFF
the
= 0 µs.
=
=
≤
=
=
following
© 2007 Microchip Technology Inc.
25 pF
2.5 kΩ
1/2 LSb
3V → Rss = 4 kΩ
85°C (system max.)
ACQ
. This calculation is
application
system