Datasheet

 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  T
A  +85°C for Industrial
-40°C  T
A  +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 t
CONV Conversion Time — 14 TAD ns
AD56 FCNV Throughput Rate — 200 — ksps VDD = VREF = 5V
AD57 T
SAMP Sampling Time 1 TAD —— nsVDD = 3-5.5V source
resistance
R
S = 0-2.5 k
Timing Parameters
AD60 t
PCS Conversion Start from Sample
Trigger
—1 TAD —ns
AD61 t
PSS Sample Start from Setting
Sample (SAMP) Bit
0.5 TAD —1.5
T
AD
ns
AD62 t
CSS Conversion Completion to
Sample Start (ASAM = 1)
—0.5 TAD —ns
AD63 t
DPU
(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: t
DPU 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.