PIC16F685-I/SO Microchip Technology, PIC16F685-I/SO Datasheet - Page 118
PIC16F685-I/SO
Manufacturer Part Number
PIC16F685-I/SO
Description
IC PIC MCU FLASH 4KX14 20SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F690DM-PCTLHS.pdf
(306 pages)
3.PIC16F677-IP.pdf
(2 pages)
4.PIC16F677-IP.pdf
(16 pages)
5.PIC16F677-ISO.pdf
(294 pages)
Specifications of PIC16F685-I/SO
Program Memory Type
FLASH
Program Memory Size
7KB (4K x 14)
Package / Case
20-SOIC (7.5mm Width)
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
18
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
I2C/SPI/SSP/EUSART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
17
Number Of Timers
3
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
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163029, DV164120
Minimum Operating Temperature
- 40 C
On-chip Adc
12-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT20SO1-1 - SOCKET TRANS ICE 20DIP TO 20SOICAC162061 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
Connectivity
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F685-I/SO
Manufacturer:
MICROCHIP
Quantity:
2 400
- PIC16F616T-ISL PDF datasheet
- PIC16F690DM-PCTLHS PDF datasheet #2
- PIC16F677-IP PDF datasheet #3
- PIC16F677-IP PDF datasheet #4
- PIC16F677-ISO PDF datasheet #5
- Current page: 118 of 294
- Download datasheet (6Mb)
PIC16F631/677/685/687/689/690
9.3
For the ADC to meet its specified accuracy, the charge
holding capacitor (C
charge to the input channel voltage level. The Analog
Input model is shown in Figure 9-4. The source
impedance (R
impedance directly affect the time required to charge the
capacitor C
varies over the device voltage (V
The maximum recommended impedance for analog
sources is 10 k . As the source impedance is
decreased, the acquisition time may be decreased.
After the analog input channel is selected (or changed),
EQUATION 9-1:
DS41262C-page 116
Note 1: The reference voltage (V
The value for T
Solving for T
Therefore:
Assumptions:
2: The charge holding capacitor (C
3: The maximum recommended impedance for analog sources is 10 k . This is required to meet the pin
A/D Acquisition Requirements
HOLD
leakage specification.
T
V
S
V
V
ACQ
T
) and the internal sampling switch (R
AP PLIE D
T
. The sampling switch (R
AP P LI ED
ACQ
AP P LIED
C
C
=
=
=
=
:
=
HOLD
C
=
=
=
ACQUISITION TIME EXAMPLE
Temperature
–
–
5µ
7.67µ
can be approximated with the following equations:
1.37
10pF 1k
⎛
⎝
C
Amplifier Settling Time
T
5µs
⎛
⎜
⎝
⎛
⎜
⎝
S
1
) must be allowed to fully
AMP
HOLD
1 e
1 e
+
µs
–
S
+
–
–
1.37µ
----------- -
2047
+
T
1
–
--------- -
R
C
–
-------- -
RC
RC
T
T
DD
Tc
IC
+
C
C
S
+
⎞
⎠
⎞
⎟
⎠
⎞
⎟
⎠
), see Figure 9-4.
+
+
+
REF
7k
=
Temperature - 25°C 0.05µs/°C
T
=
=
=
R
SS
COFF
) has no effect on the equation, since it cancels itself out.
SS
50°C- 25°C 0.05µ
) impedance
50°C and external impedance of 10k
V
V
V
+
+
CHOLD
A P PLIE D
HOLD
CHOLD
10k
R
S
+
) is not discharged after each conversion.
Preliminary
ln(1/2047)
SS
Hold Capacitor Charging Time
ln(0.0004885)
)
⎛
⎝
1
–
----------- -
2047
S
1
/°C
an A/D acquisition must be done before the conversion
can be started. To calculate the minimum acquisition
time, Equation 9-1 may be used. This equation
assumes that 1/2 LSb error is used (1024 steps for the
ADC). The 1/2 LSb error is the maximum error allowed
for the ADC to meet its specified resolution.
⎞
⎠
;[2] V
;combining [1] and [2]
;[1] V
CHOLD
CHOLD
5.0V V
+
charge response to V
charged to within 1/2 lsb
Temperature Coefficient
© 2006 Microchip Technology Inc.
DD
APPLIED
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