PIC18F258-E/SO Microchip Technology, PIC18F258-E/SO Datasheet - Page 247
![IC MCU FLASH 16KX16 CAN 28-SOIC](/photos/6/59/65909/150-28-soic_sml.jpg)
PIC18F258-E/SO
Manufacturer Part Number
PIC18F258-E/SO
Description
IC MCU FLASH 16KX16 CAN 28-SOIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16C770-ISO.pdf
(8 pages)
3.PIC18LF242-ISO.pdf
(36 pages)
4.PIC18F248-ISO.pdf
(402 pages)
5.PIC18F248-ISO.pdf
(8 pages)
Specifications of PIC18F258-E/SO
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
22
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
28-SOIC (7.5mm Width)
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
1.5 KB
Interface Type
SPI, I2C, USART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
22
Number Of Timers
4 bit
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 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, DM163011, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
5 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18F258-E/SO
Manufacturer:
MIC
Quantity:
20 000
- PIC16F616T-ISL PDF datasheet
- PIC16C770-ISO PDF datasheet #2
- PIC18LF242-ISO PDF datasheet #3
- PIC18F248-ISO PDF datasheet #4
- PIC18F248-ISO PDF datasheet #5
- Current page: 247 of 402
- Download datasheet (7Mb)
To
Equation 20-1 may be used. This equation assumes
that 1/2 LSb error is used (1024 steps for the A/D). The
1/2 LSb error is the maximum error allowed for the A/D
to meet its specified resolution.
Example 20-1 shows the calculation of the minimum
required acquisition time T
based on the following application system assumptions:
• C
• Rs
• Conversion Error
• V
• Temperature
• V
EQUATION 20-1:
EQUATION 20-2:
EXAMPLE 20-1:
© 2006 Microchip Technology Inc.
T
V
or
Tc
T
Temperature coefficient is only required for temperatures > 25 C.
T
T
T
ACQ
ACQ
ACQ
C
ACQ
Note:
HOLD
DD
HOLD
HOLD
calculate
=
=
=
=
=
=
=
=
When using external voltage references with the A/D converter, the source impedance of the external
voltage references must be less than 20 to obtain the specified A/D resolution. Higher reference source
impedances will increase both offset and gain errors. Resistive voltage dividers will not provide a sufficiently
low source impedance.
To maintain the best possible performance in A/D conversions, external V
an operational amplifier or other low output impedance circuit.
Amplifier Settling Time + Holding Capacitor Charging Time + Temperature Coefficient
T
T
2 s + T
-C
-120 pF (1 k + 7 k + 2.5 k ) ln(0.0004885)
-120 pF (10.5 k ) ln(0.0004885)
-1.26 s (-7.6241)
9.61 s
2 s + 9.61 s + [(50 C – 25 C)(0.05 s/ C)]
11.61 s + 1.25 s
12.86 s
AMP
AMP
HOLD
(V
-(120 pF)(1 k + R
the
REF
+ T
+ T
=
=
=
=
=
C
(R
C
ACQUISITION TIME
A/D MINIMUM CHARGING TIME
CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
– (V
C
minimum
+ [(Temp – 25 C)(0.05 s/ C)]
+ T
IC
+ T
120 pF
2.5 k
1/2 LSb
5V
50 C (system max.)
0V @ time = 0
+ R
REF
COFF
COFF
ACQ
/2048)) • (1 – e
SS
Rss = 7 k
. This calculation is
+ R
SS
acquisition
S
) ln(1/2047)
+ R
S
) ln(1/2047)
(-Tc/C
HOLD
time,
(R
IC
+ R
SS
+ R
S
))
)
REF
inputs should be buffered with
PIC18FXX8
DS41159E-page 245
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