PIC12CE519-04E/SN Microchip Technology, PIC12CE519-04E/SN Datasheet - Page 428
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PIC12CE519-04E/SN
Manufacturer Part Number
PIC12CE519-04E/SN
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SOP,8PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 12Cr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC12C508A-04SM.pdf
(113 pages)
3.PIC12C508A-04SM.pdf
(4 pages)
4.PIC12CE518-04SM.pdf
(16 pages)
Specifications of PIC12CE519-04E/SN
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Size
1.5KB (1K x 12)
Program Memory Type
OTP
Eeprom Size
16 x 8
Ram Size
41 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
309-1046 - ADAPTER 8-SOIC TO 8-DIP309-1045 - ADAPTER 8-SOIC TO 8-DIP
Data Converters
-
Connectivity
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F688T-ISL PDF datasheet
- PIC12C508A-04SM PDF datasheet #2
- PIC12C508A-04SM PDF datasheet #3
- PIC12CE518-04SM PDF datasheet #4
- Current page: 428 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
23.4
DS31023A-page 23-6
A/D Acquisition Requirements
For the A/D converter to meet its specified accuracy, the charge holding capacitor (C
be allowed to fully charge to the input channel voltage level. The analog input model is shown in
Figure
directly affect the time required to charge the capacitor C
ance varies over the device voltage (V
ance for analog sources is 10 k . As the impedance 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,
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.
Equation 23-1:
Equation 23-2:
Example 23-1
This calculation is based on the following application system assumptions.
C
Rs
Conversion Error
V
Temperature
V
Example 23-1:
T
T
Temperature coefficient is only required for temperatures > 25 C.
T
T
T
DD
HOLD
HOLD
V
or
Tc
ACQ
ACQ
ACQ
C
ACQ
HOLD
=
=
23-3. The source impedance (R
=
=
=
=
Amplifier Settling Time +
Holding Capacitor Charging Time +
Temperature Coefficient
T
=
=
T
2 s + Tc + [(Temp - 25 C)(0.05 s/ C)]
-C
-120 pF (1 k + 7 k + 10 k ) ln(0.0004885)
-120 pF (18 k ) ln(0.0004885)
-2.16 s (-7.6241)
16.47 s
2 s + 16.47 s + [(50 C - 25 C)(0.05 s/ C)]
18.47 s + 1.25 s
19.72 s
shows the calculation of the minimum required acquisition time T
AMP
AMP
HOLD
Acquisition Time
A/D Minimum Charging Time
(V
-(120 pF)(1 k + R
Calculating the Minimum Required Acquisition Time (Case 1)
+ T
+ T
REF
(R
=
=
=
=
=
C
C
- (V
IC
+ T
+ T
+ R
Preliminary
120 pF
10 k
1/2 LSb
5V
50 C (system max.)
0V @ time = 0
REF
COFF
COFF
SS
/2048)) • (1 - e
+ R
Rss = 7 k
SS
S
DD
) ln(1/2047)
S
+ R
),
) and the internal sampling switch (R
Equation 23-1
Figure
S
) ln(1/2047)
(-Tc/C
23-3. The maximum recommended imped-
(see graph in
HOLD
HOLD
may be used. This equation assumes
(R
IC
. The sampling switch (R
+ R
SS
Figure
1997 Microchip Technology Inc.
+ R
S
))
)
23-3)
ACQ
SS
) impedance
.
HOLD
SS
) imped-
) must
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