Datasheet

 2013-2014 Microchip Technology Inc. DS70000689D-page 495
dsPIC33EPXXXGM3XX/6XX/7XX
TABLE 33-59: ADCx CONVERSION (12-BIT MODE) TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions (see Note 2): 3.0V to 3.6V
(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.
(4)
Max. Units Conditions
Clock Parameters
AD50 T
AD ADCx Clock Period 117.6 — — ns
AD51 tRC ADCx Internal RC Oscillator Period — 250 — ns
Conversion Rate
AD55 t
CONV Conversion Time — 14 TAD ns
AD56 FCNV Throughput Rate — — 500 ksps
AD57a TSAMP Sample Time When Sampling Any
ANx Input
3 TAD —— —
AD57b T
SAMP Sample Time When Sampling the
Op Amp Outputs
3 TAD —— —
Timing Parameters
AD60 t
PCS Conversion Start from Sample
Trigger
(1)
2 TAD —3 TAD — Auto-convert trigger is
not selected
AD61 t
PSS Sample Start from Setting
Sample (SAMP) bit
(1)
2 TAD —3 TAD —
AD62 t
CSS Conversion Completion to
Sample Start (ASAM = 1)
(1)
— 0.5 TAD ——
AD63 t
DPU Time to Stabilize Analog Stage
from ADCx Off to ADCx On
(1)
——20s (Note 3)
Note 1: Because the sample caps will eventually lose charge, clock rates below 10 kHz may affect linearity
performance, especially at elevated temperatures.
2: Device is functional at VBORMIN < VDD < VDDMIN, but will have degraded performance. Device functionality
is tested, but not characterized. Analog modules: ADC, op amp/comparator and comparator voltage
reference, will have degraded performance. Refer to Parameter BO10 in Table 33-12 for the minimum and
maximum BOR values.
3: The parameter, tDPU, is the time required for the ADCx module to stabilize at the appropriate level when the
module is turned on (ADON (AD1CON1<15>) = 1). During this time, the ADCx result is indeterminate.
4: These parameters are characterized, but not tested in manufacturing.