Datasheet

© 2010 Microchip Technology Inc. DS70139G-page 185
dsPIC30F2011/2012/3012/3013
TABLE 20-37: 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 T
AD A/D Clock Period 334 — — ns VDD = 3-5.5V (Note 1)
AD51 t
RC A/D Internal RC Oscillator Period 1.2 1.5 1.8 μs
Conversion Rate
AD55 t
CONV Conversion Time — 14 TAD ns
AD56a F
CNV Throughput Rate — 200 — ksps VDD = VREF = 5V,
Industrial temperature
AD56b FCNV Throughput Rate — 100 — ksps VDD = VREF = 5V,
Extended temperature
AD57 TSAMP Sampling Time 1 TAD —— nsVDD = 3-5.5V source
resistance
RS = 0-2.5 kΩ
Timing Parameters
AD60 t
PCS 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 t
CSS 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
——20μs
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.