
2010 Microchip Technology Inc.
DS70138G-page 209
dsPIC30F3014/4013
TABLE 23-38: 12-BIT A/D CONVERSION TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.7V to 5.5V
(unless otherwise stated)
Operating temperature
-40°C
TA +85°C for Industrial
-40°C
TA +125°C for Extended
Param
No.
Symbol
Characteristic
Min.
Typ
Max.
Units
Conditions
Clock Parameters
AD50
TAD
A/D Clock Period
334
—
ns
VDD = 3-5.5V (Note 1)
AD51
tRC
A/D Internal RC Oscillator Period
1.2
1.5
1.8
s
Conversion Rate
AD55
tCONV
Conversion Time
—
14 TAD
ns
AD56
FCNV
Throughput Rate
—
200
—
ksps
VDD = VREF = 5V
AD57
TSAMP
Sampling Time
1 TAD
——
ns
VDD = 3-5.5V source
resistance
RS = 0-2.5 k
Timing Parameters
AD60
tPCS
Conversion Start from Sample
Trigger
—1 TAD
—ns
AD61
tPSS
Sample Start from Setting
Sample (SAMP) Bit
0.5 TAD
—1.5
TAD
ns
AD62
tCSS
Conversion Completion to
Sample Start (ASAM = 1)
—0.5 TAD
—ns
AD63
tDPU(2)
Time to Stabilize Analog Stage
from A/D Off to A/D On
——
20
s
Note 1:
Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity
performance, especially at elevated temperatures.
2:
tDPU is the time required for the ADC module to stabilize when it is turned on (ADCON1<ADON> = 1).
During this time the ADC result is indeterminate.