PIC16C74A-20/P Microchip Technology, PIC16C74A-20/P Datasheet - Page 82
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PIC16C74A-20/P
Manufacturer Part Number
PIC16C74A-20/P
Description
IC MCU OTP 4KX14 A/D PWM 40DIP
Manufacturer
Microchip Technology
Series
PIC® 16Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F818-ISO.pdf
(6 pages)
3.PIC16C63A-04SP.pdf
(184 pages)
4.PIC16C72-04SO.pdf
(289 pages)
5.PIC16LC74A-04P.pdf
(8 pages)
Specifications of PIC16C74A-20/P
Core Size
8-Bit
Program Memory Size
7KB (4K x 14)
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Core Processor
PIC
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Number Of I /o
33
Program Memory Type
OTP
Ram Size
192 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Data Converters
A/D 8x8b
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
40-DIP (0.600", 15.24mm)
Controller Family/series
PIC16C
No. Of I/o's
33
Ram Memory Size
192Byte
Cpu Speed
20MHz
No. Of Timers
3
Package
40PDIP
Device Core
PIC
Family Name
PIC16
Maximum Speed
20 MHz
Operating Supply Voltage
5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
33
Interface Type
I2C/SPI/USART
On-chip Adc
8-chx8-bit
Number Of Timers
3
Core
PIC
Processor Series
PIC16C
Maximum Clock Frequency
20 MHz
Data Ram Size
192 B
Data Rom Size
192 B
Mounting Style
Through Hole
A/d Bit Size
8 bit
A/d Channels Available
8
Height
3.81 mm
Length
52.26 mm
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Supply Voltage (max)
6 V
Supply Voltage (min)
4 V
Width
13.84 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
444-1001 - DEMO BOARD FOR PICMICRO MCU
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16C74A-20/PQ
Manufacturer:
Microchip Technology
Quantity:
10 000
Company:
Part Number:
PIC16C74A-20/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
PIC16C63A/65B/73B/74B
12.1
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 12-2. The
source impedance (R
switch (R
required to charge the capacitor C
switch (R
(V
offset voltage at the analog input (due to pin leakage
current).
FIGURE 12-2:
EQUATION 12-1:
DS30605C-page 82
T
DD
ACQ
), Figure 12-2. The source impedance affects the
A/D Acquisition Requirements
=
=
SS
SS
) impedance varies over the device voltage
) impedance directly affect the time
Amplifier Settling Time +
Hold Capacitor Charging Time +
Temperature Coefficient
T
T
T
T
AMP
AMP
C
COFF
= - (51.2 pF)(1 k + R
Legend:
+ T
= 5 S
= (Temp -25 C)(0.05 S/ C)
VA
C
ANALOG INPUT MODEL
ACQUISITION TIME
S
+ T
) and the internal sampling
Rs
C
V
I leakage
R
SS
C
T
COFF
PIN
IC
HOLD
ANx
C
5 pF
HOLD
PIN
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
HOLD
various junctions
) must be allowed
SS
. The sampling
+ R
S
) In(1/511)
V
DD
V
V
T
T
= 0.6 V
= 0.6 V
I leakage
± 500 nA
The maximum recommended impedance for ana-
log sources is 10 k . After the analog input channel is
selected (changed), the acquisition time (T
pass before the conversion can be started.
To
Equation 12-1 may be used. This equation assumes
that 1/2 LSb error is used (512 steps for the A/D). The
1/2 LSb error is the maximum error allowed for the A/D
to meet its specified resolution.
For more information, see the PICmicro™ Mid-Range
MCU Family Reference Manual (DS33023). In general,
however, given a maximum source impedance of
10 k
will be no more than 16 sec.
R
IC
£ 1k
calculate
and a worst case temperature of 100°C, T
V
SS R
DD
Sampling
Switch
6V
5V
4V
3V
2V
SS
the
Sampling Switch
5 6 7 8 9 10 11
V
minimum
SS
C
= DAC capacitance
= 51.2 pF
(k )
HOLD
2000 Microchip Technology Inc.
acquisition
ACQ
) must
time,
ACQ