PIC16F676-E/SL Microchip Technology, PIC16F676-E/SL Datasheet - Page 49
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PIC16F676-E/SL
Manufacturer Part Number
PIC16F676-E/SL
Description
14 PIN, 1.75KB STD FLASH, 64 RAM, 12 I/O,
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC12F629T-ISN.pdf
(24 pages)
3.PIC16F630-ISL.pdf
(132 pages)
4.PIC16F630-ISL.pdf
(2 pages)
5.PIC16F630-ISL.pdf
(10 pages)
Specifications of PIC16F676-E/SL
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
12
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
64 B
Interface Type
RS- 232, USB
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
1 x 8
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
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
On-chip Adc
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Connectivity
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F676-E/SL
Manufacturer:
MICROCHIP
Quantity:
2 500
Company:
Part Number:
PIC16F676-E/SL
Manufacturer:
Microchip Technology
Quantity:
135
7.2
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 7-3. The source
impedance (R
impedance directly affect the time required to charge
the capacitor C
impedance varies over the device voltage (V
Figure 7-3. The maximum recommended imped-
ance for analog sources is 10 k. As the impedance
EQUATION 7-1:
FIGURE 7-3:
2010 Microchip Technology Inc.
T
T
T
ACQ
ACQ
C
Note 1: The reference voltage (V
A/D Acquisition Requirements
2: The charge holding capacitor (C
3: The maximum recommended impedance for analog sources is 10 k. This is required to meet the pin
=
=
=
=
=
=
=
=
leakage specification.
Amplifier Settling Time +
Hold Capacitor Charging Time +
Temperature Coefficient
T
2s + T
C
- 120pF (1k + 7k + 10k) In(0.0004885)
16.47s
2s + 16.47s + [(50°C -25C)(0.05s/C)
19.72s
S
AMP
HOLD
) and the internal sampling switch (R
Legend: C
HOLD
+ T
C
(R
VA
. The sampling switch (R
C
+ [(Temperature -25°C)(0.05s/°C)]
ACQUISITION TIME
ANALOG INPUT MODEL
IC
+ T
V
I
R
SS
C
R
+ R
LEAKAGE
T
PIN
IC
HOLD
S
COFF
SS
ANx
C
5 pF
+ R
HOLD
PIN
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
S
) In(1/2047)
various junctions
) must be allowed
REF
) has no effect on the equation, since it cancels itself out.
HOLD
V
DD
DD
), see
V
V
) is not discharged after each conversion.
T
T
SS
SS
= 0.6V
= 0.6V
)
)
I
± 500 nA
LEAKAGE
is decreased, the acquisition time may be decreased.
After the analog input channel is selected (changed),
this acquisition must be done before the conversion
can be started.
To calculate the minimum acquisition time, Equation 7-1
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.
To calculate the minimum acquisition time, T
the PIC
R
IC
1K
®
Mid-Range Reference Manual (DS33023).
V
SS R
Sampling
Switch
DD
6V
5V
4V
3V
2V
PIC16F630/676
SS
Sampling Switch
5 6 7 8 9 10 11
V
SS
C
= DAC capacitance
= 120 pF
(k)
HOLD
DS40039F-page 49
ACQ
, see