PIC18F8393T-I/PT Microchip Technology, PIC18F8393T-I/PT Datasheet - Page 36
PIC18F8393T-I/PT
Manufacturer Part Number
PIC18F8393T-I/PT
Description
PIC18F With 192-segment LCD Driver And 12-bit ADC, 8KB Flash, 768B RAM, CCP, MSS
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Specifications of PIC18F8393T-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
Number Of I /o
66
Program Memory Size
8KB (4K x 16)
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
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
XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFP
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
PIC18F8393T-I/PTTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F8393T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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 k. 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:
DS39896C-page 36
T
V
or
T
T
T
T
Temperature coefficient is only required for temperatures > 25C. Below 25C, T
T
T
ACQ
Note:
C
ACQ
AMP
COFF
C
ACQ
HOLD
= Amplifier Settling Time + Holding Capacitor Charging Time + Temperature Coefficient
= T
=
= (V
= T
= 0.2 µs
= (Temp – 25C)(0.02 µs/C)
= -(C
= 0.2 µs + 1.56 s + 1.2 µs
A/D Acquisition Requirements
(85C – 25C)(0.02 µs/C)
1.2 µs
-(25 pF) (1 k + 4 k + 2.5 k) ln(0.0002441) µs
1.56 µs
2.96 µs
AMP
(C
When the conversion is started, the
holding capacitor is disconnected from the
input pin.
AMP
S
REF
HOLD
HOLD
) and the internal sampling switch (R
+ T
+ T
HOLD
– (V
C
)(R
)(R
C
+ T
+ T
REF
IC
IC
. The sampling switch (R
A/D ACQUISITION TIME
A/D MINIMUM CHARGING TIME
CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
COFF
+ R
+ R
COFF
/4096)) • (1 – e
SS
SS
+ R
+ R
HOLD
S
S
) ln(1/4096)
) ln(1/4096) µs
) must be allowed
(-T
C
/C
HOLD
DD
(R
). The
IC
SS
SS
+ 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
2010 Microchip Technology Inc.
25 pF
2.5 k
1/2 LSb
3V Rss = 4 k
85C (system max.)
ACQ
. This calculation is
application
system