DSPIC30F6014A-30I/PF Microchip Technology Inc., DSPIC30F6014A-30I/PF Datasheet - Page 140
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DSPIC30F6014A-30I/PF
Manufacturer Part Number
DSPIC30F6014A-30I/PF
Description
16 BIT MCU/DSP 80LD 30MIPS 144 KB FLASH
Manufacturer
Microchip Technology Inc.
Type
DSPr
Datasheet
1.DSPIC30F6014A-30IPF.pdf
(238 pages)
Specifications of DSPIC30F6014A-30I/PF
A/d Inputs
16-Channels, 12-Bit
Cpu Speed
30 MIPS
Eeprom Memory
4K Bytes
Input Output
68
Interface
CAN/I2C/SPI/UART
Ios
68
Memory Type
Flash
Number Of Bits
16
Package Type
80-pin TQFP
Programmable Memory
144K Bytes
Ram Size
8K Bytes
Timers
5-16-bit, 2-32-bit
Voltage, Range
2.5-5.5
Lead Free Status / Rohs Status
RoHS Compliant part
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dsPIC30F6011A/6012A/6013A/6014A
FIGURE 19-3:
19.8
The analog input model of the 12-bit ADC is shown in
Figure 19-4. The total sampling time for the ADC is a
function of the internal amplifier settling time and the
holding capacitor charge time.
For the ADC to meet its specified accuracy, the charge
holding capacitor (C
charge to the voltage level on the analog input pin. The
source impedance (R
(R
FIGURE 19-4:
DS70143B-page 138
IC
Instruction Execution BSET ADCON1, ASAM
), and the internal sampling switch (R
ADCBUF0
ADCBUF1
ADCLK
DONE
SAMP
ADC Acquisition Requirements
Note: C
Legend: C
VA
PIN
HOLD
Rs
S
value depends on device package and is not tested. Effect of C
CONVERTING 1 CHANNEL AT 200 KSPS, AUTO-SAMPLE START, 1 T
SAMPLING TIME
12-BIT ADC ANALOG INPUT MODEL
), the interconnect impedance
V
I leakage
R
R
C
ANx
) must be allowed to fully
T
PIN
IC
SS
HOLD
C
PIN
= 1 T
T
SAMP
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch resistance
= sample/hold capacitance (from DAC)
AD
various junctions
V
DD
SS
V
) imped-
V
T
T
= 0.6V
= 0.6V
Preliminary
= 14 T
T
CONV
AD
R
I leakage
= 1 T
T
IC
SAMP
500 nA
AD
250
ance combine to directly affect the time required to
charge the capacitor C
of the analog sources must therefore be small enough
to fully charge the holding capacitor within the chosen
sample time. To minimize the effects of pin leakage cur-
rents on the accuracy of the ADC, the maximum rec-
ommended source impedance, R
analog input channel is selected (changed), this sam-
pling function must be completed prior to starting the
conversion. The internal holding capacitor will be in a
discharged state prior to each sample operation.
Sampling
Switch
R
SS
= 14 T
PIN
T
CONV
R
negligible if Rs
SS
V
AD
SS
C
= DAC capacitance
= 18 pF
HOLD
HOLD
3 k
© 2005 Microchip Technology Inc.
. The combined impedance
S
2.5 k .
, is 2.5 k . After the
AD
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