PIC18F2439T-I/SO Microchip Technology, PIC18F2439T-I/SO Datasheet - Page 187
![IC MCU FLASH 6KX16 EE A/D 28SOIC](/photos/6/59/65909/150-28-soic_sml.jpg)
PIC18F2439T-I/SO
Manufacturer Part Number
PIC18F2439T-I/SO
Description
IC MCU FLASH 6KX16 EE A/D 28SOIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18F2439-ISO.pdf
(322 pages)
3.PIC18F2439-ISO.pdf
(6 pages)
4.PIC18F2439-ISO.pdf
(34 pages)
Specifications of PIC18F2439T-I/SO
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
21
Program Memory Size
12KB (6K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
640 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
640 B
Interface Type
I2C, SPI, AUSART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
21
Number Of Timers
16 bit
Operating Supply Voltage
2 V to 5.5 V
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
DV164005, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
5 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC18F2439-ISO PDF datasheet #2
- PIC18F2439-ISO PDF datasheet #3
- PIC18F2439-ISO PDF datasheet #4
- Current page: 187 of 322
- Download datasheet (7Mb)
To
Equation 18-1 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.
EQUATION 18-1:
EQUATION 18-2:
Example 18-1 shows the calculation of the minimum
required acquisition time, T
based
assumptions:
• C
• Rs
• Conversion Error ≤
• V
• Temperature
• V
EXAMPLE 18-1:
2002 Microchip Technology Inc.
T
V
or
T
T
Temperature coefficient is only required for temperatures > 25°C.
T
T
T
ACQ
C
ACQ
ACQ
C
ACQ
HOLD
DD
HOLD
HOLD
calculate
=
=
=
=
=
=
=
=
on
T
2 µs + T
-C
-120 pF (1 kΩ + 7 kΩ + 2.5 kΩ) ln(0.0004883)
-120 pF (10.5 kΩ) ln(0.0004883)
-1.26 µs (-7.6246)
9.61 µs
2 µs + 9.61 µs + [(50°C – 25°C)(0.05 µs/°C)]
11.61 µs + 1.25 µs
12.86 µs
AMP
Amplifier Settling Time + Holding Capacitor Charging Time + Temperature Coefficient
(V
-(120 pF)(1 kΩ + R
T
HOLD
AMP
the
REF
the
+ T
+ T
C
– (V
(R
C
following
+ [(Temp – 25°C)(0.05 µs/°C)]
=
=
=
=
=
IC
ACQUISITION TIME
C
A/D MINIMUM CHARGING TIME
+ T
CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
minimum
REF
+ T
+ R
COFF
120 pF
2.5 kΩ
1/2 LSb
5V → Rss = 7 kΩ
50°C (system max.)
0V @ time = 0
/2048)) • (1 – e
COFF
SS
ACQ
+ R
SS
. This calculation is
application
S
+ R
) ln(1/2048)
acquisition
S
) ln(1/2048)
(-Tc/C
HOLD
system
time,
(R
Preliminary
IC
+ R
SS
+ R
S
))
)
PIC18FXX39
DS30485A-page 185
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