dsPIC33FJXXXGPX06/X08/X10
TABLE 25-41: ADC CONVERSION (10-BIT MODE) TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
Param
No.
Symbol
Characteristic
Min. Typ(1) Max. Units
Conditions
Clock Parameters
AD50b TAD
ADC Clock Period
65
—
—
ns
—
AD51b TRC ADC Internal RC Oscillator Period —
250
—
ns
—
Conversion Rate
AD55b TCONV Conversion Time
— 12 TAD —
—
—
AD56b FCNV Throughput Rate
—
—
1.1 Msps
—
AD57b TSAMP Sample Time
2 TAD
—
—
—
—
Timing Parameters
AD60b TPCS
Conversion Start from Sample
Trigger(2)
2.0 TAD —
3.0 TAD
— Auto-Convert Trigger
(SSRC<2:0> = 111) not
selected
AD61b TPSS Sample Start from Setting
2.0 TAD — 3.0 TAD —
—
Sample (SAMP) bit(2)
AD62b TCSS Conversion Completion to
— 0.5 TAD —
—
—
Sample Start (ASAM = 1)(2)
AD63b TDPU Time to Stabilize Analog Stage
—
—
20
μs
—
from ADC Off to ADC On(2,3)
Note 1: These parameters are characterized but not tested in manufacturing.
2: Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity
performance, especially at elevated temperatures.
3: TDPU is the time required for the ADC module to stabilize when it is turned on (AD1CON1<ADON> = 1).
During this time, the ADC result is indeterminate.
DS70286C-page 296
© 2009 Microchip Technology Inc.