PIC18F2431-I/SP Microchip Technology Inc., PIC18F2431-I/SP Datasheet - Page 256

• Manufacturer Part Number: PIC18F2431-I/SP
• Description: Microcontroller; 16 KB Flash; 768 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2431-I/SP

• A/d Inputs: 5-Channel, 10-Bit
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 24
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 16K Bytes
• Ram Size: 768 Bytes
• Speed: 40 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC18F2331/2431/4331/4431
EXAMPLE 20-1:
FIGURE 20-2:
DS39616B-page 254
T
T
T
Temperature coefficient is only required for temperatures > 25 C. Below 25 C, T
T
T
ACQ
AMP
COFF
C
ACQ
Note:
Note:
Legend: C
=
=
=
–
=
If the converter module has been in Sleep mode, T
V
AIN
For V
Rs
V
I
R
SS
C
R
T
negligible
(Temp – 25 C)(0.005 s/ C)
(50 C – 25 C)(0.005 s/ C) = .13 s
-(C
-(9 pF) (1 k + 6 k + 100 ) ln(0.0004883) s = .49 s + .13 s = .62 s
0 + .62 s + .13 s = .75 s
DD
LEAKAGE
T
PIN
IC
HOLD
SS
AMP
CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
ANALOG INPUT MODEL
< 2.7V and temperatures below 0ºC, V
HOLD
ANx
C
5 pF
+ T
PIN
) (R
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
= sampling switch resistance
C
various junctions
+ T
IC
COFF
+ R
SS
+ R
V
S
DD
) ln(1/2047) s
V
V
T
T
= 0.6V
= 0.6V
Preliminary
AIN
AMP
should be restricted to range: V
I leakage
± 500 nA
is 2.0 µs from the time the part exits Sleep mode.
R
IC
1k
COFF
V
SS
DD
Sampling
Switch
= 0 s.
6V
5V
4V
3V
2V
R
SS
 2003 Microchip Technology Inc.
AIN
Sampling Switch
5 6 7 8 9 10 11
V
< V
SS
C
HOLD
DD
/2.
= 9 pF
(k )