PIC12C672T-04/SM Microchip Technology, PIC12C672T-04/SM Datasheet - Page 429
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC12C672T-04/SM
Manufacturer Part Number
PIC12C672T-04/SM
Description
IC MCU OTP 2KX14 A/D 8-SOIJ
Manufacturer
Microchip Technology
Series
PIC® 12Cr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC12CE673-10P.pdf
(129 pages)
3.PIC12CE673-10P.pdf
(14 pages)
Specifications of PIC12C672T-04/SM
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
OTP
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
For Use With
XLT08SO-1 - SOCKET TRANSITION 8SOIC 150/208AC164312 - MODULE SKT FOR PM3 16SOIC309-1048 - ADAPTER 8-SOIC TO 8-DIP309-1047 - ADAPTER 8-SOIC TO 8-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
- Current page: 429 of 688
- Download datasheet (3Mb)
1997 Microchip Technology Inc.
Legend C
V
AIN
Rs
V
I
R
SS
C
LEAKAGE
T
PIN
IC
HOLD
ANx
C
5 pF
Now to get an idea what happens to the acquisition time when the source impedance is a mini-
mal value ( R
the source impedance made a minimal value ( R
Example 23-2:
Figure 23-3: Analog Input Model
PIN
T
Temperature coefficient is only required for temperatures > 25 C.
T
T
T
ACQ
ACQ
C
ACQ
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
Note 1: The reference voltage (V
Note 2: The charge holding capacitor (C
Note 3: The maximum recommended impedance for analog sources is 10 k . This is
Note 4: After a conversion has completed, a 2.0T
=
various junctions
=
=
=
Section 23. 10-bit A/D Converter
out.
required to meet the pin leakage specification.
can begin again. During this time the holding capacitor is not connected to the
selected A/D input channel.
S
T
2 s + Tc + [(Temp - 25 C)(0.05 s/ C)]
-C
-120 pF (1 k + 7 k + 50 ) ln(0.0004885)
-120 pF (8050 ) ln(0.0004885)
-0.966 s (-7.6241)
7.36 s
2 s + 16.47 s + [(50 C - 25 C)(0.05 s/ C)]
9.36 s + 1.25 s
10.61 s
= 50
AMP
V
HOLD
DD
Calculating the Minimum Required Acquisition Time (Case 2)
V
+ T
V
).
T
T
(R
Example 23-2
= 0.6V
= 0.6V
C
IC
+ T
+ R
Preliminary
COFF
SS
+ R
I leakage
100 nA
REF
shows the same conditions as in
S
R
) ln(1/2047)
IC
) has no effect on the equation, since it cancels itself
HOLD
1k
S
V
) is not discharged after each conversion.
= 50 ).
SS
DD
Sampling
Switch
AD
6V
5V
4V
3V
2V
R
delay must complete before acquisition
SS
Sampling Switch
5 6 7 8 9 10 11
V
SS
C
( k )
HOLD
Example 23-1
= 120 pF
DS31023A-page 23-7
with only
23
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