PIC18LF8585-I/PT Microchip Technology, PIC18LF8585-I/PT Datasheet - Page 256
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PIC18LF8585-I/PT
Manufacturer Part Number
PIC18LF8585-I/PT
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,80PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PCM18XK1.pdf
(496 pages)
3.PIC18F6585-IPT.pdf
(8 pages)
4.PIC18F6585-IPT.pdf
(38 pages)
5.PIC18F6585-IPT.pdf
(14 pages)
Specifications of PIC18LF8585-I/PT
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
68
Program Memory Size
48KB (24K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.25K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TFQFP
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3328 B
Interface Type
I2C, SPI, AUSART, CAN
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
69
Number Of Timers
8
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
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM163015
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PIC18LF8585-I/PTR
PIC18LF8585-I/PTR
PIC18LF8585-I/PTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18LF8585-I/PT
Manufacturer:
Microchip
Quantity:
130
Company:
Part Number:
PIC18LF8585-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PCM18XK1 PDF datasheet #2
- PIC18F6585-IPT PDF datasheet #3
- PIC18F6585-IPT PDF datasheet #4
- PIC18F6585-IPT PDF datasheet #5
- Current page: 256 of 496
- Download datasheet (9Mb)
PIC18F6585/8585/6680/8680
19.1
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 19-2. The
source impedance (R
switch (R
required to charge the capacitor C
switch (R
(V
at the analog 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), this acquisition must be done
before the conversion can be started.
To
Equation 19-1 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 19-1 shows the calculation of the minimum
required acquisition time, T
on the following application system assumptions:
C
Rs
Conversion Error
V
Temperature
V
EQUATION 19-1:
EQUATION 19-2:
EXAMPLE 19-1:
DS30491C-page 254
T
V
or
T
T
Temperature coefficient is only required for temperatures > 25 C.
T
T
T
HOLD
DD
HOLD
ACQ
C
ACQ
ACQ
C
ACQ
DD
Note:
HOLD
). The source impedance affects the offset voltage
calculate
A/D Acquisition Requirements
SS
=
=
=
=
=
=
SS
=
=
) impedance varies over the device voltage
When the conversion is started, the
holding capacitor is disconnected from the
input pin.
) impedance directly affect the time
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
Amplifier Settling Time + Holding Capacitor Charging Time + Temperature Coefficient
T
(V
-(120 pF)(1 k + R
AMP
AMP
the
REF
HOLD
=
=
=
=
=
+ T
+ T
– (V
ACQUISITION TIME
A/D MINIMUM CHARGING TIME
CALCULATING THE MINIMUM REQUIRED ACQUISITION TIME
C
S
(R
minimum
C
) and the internal sampling
C
+ [(Temp – 25 C)(0.05 s/ C)]
120 pF
2.5 k
1/2 LSb
5V
50 C (system max.)
0V @ time = 0
IC
REF
ACQ
+ T
+ T
+ R
/2048)) • (1 – e
COFF
COFF
. This calculation is based
Rss = 7 k
SS
HOLD
SS
+ R
HOLD
acquisition
+ R
) must be allowed
S
) ln(1/2047)
S
. The sampling
) ln(1/2047)
(-Tc/C
HOLD
time,
(R
IC
+ R
SS
+ R
S
))
19.2
If external voltage references are used instead of the
internal AV
of the V
ered. During acquisition, currents supplied by these
sources are insignificant. However, during conversion,
the A/D module sinks and sources current through the
reference sources. The effect of this current, as specified
in parameter A50, along with source impedance must be
considered to meet specified A/D resolution.
)
Note:
REF
A/D V
DD
+ and V
To maintain the best possible performance
in A/D conversions, external V
should be buffered with an operational
amplifier or other low output impedance
circuit.
When using external voltage references
with the A/D converter, the source imped-
ance of the external voltage references
must be less than 20 to obtain the spec-
ified 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.
and AV
REF
REF
+ and V
SS
- voltage sources must be consid-
sources, the source impedance
2004 Microchip Technology Inc.
REF
- References
REF
inputs
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