Microchip Technology MA330031-2 Data Sheet
2011-2013 Microchip Technology Inc.
DS70000657H-page 463
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
TABLE 30-60: ADC CONVERSION (12-BIT MODE) TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
(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
T
AD
ADC Clock Period
117.6
—
—
ns
AD51
t
RC
ADC Internal RC Oscillator Period
)
—
250
—
ns
Conversion Rate
AD55
t
CONV
Conversion Time
—
14 T
AD
ns
AD56
F
CNV
Throughput Rate
—
—
500
ksps
AD57a T
SAMP
Sample Time when Sampling any
ANx Input
ANx Input
3 T
AD
—
—
—
AD57b T
SAMP
Sample Time when Sampling the Op
Amp Outputs (Configuration A
Amp Outputs (Configuration A
and
Configuration B)
)
3 T
AD
—
—
—
Timing Parameters
AD60
t
PCS
Conversion Start from Sample
Trigger
Trigger
(
)
2 T
AD
—
3 T
AD
—
Auto-convert trigger is
not selected
not selected
AD61
t
PSS
Sample Start from Setting
Sample (SAMP) bit
Sample (SAMP) bit
)
2 T
AD
—
3 T
AD
—
AD62
t
CSS
Conversion Completion to
Sample Start (ASAM = 1)
Sample Start (ASAM = 1)
(
—
0.5 T
AD
—
—
AD63
t
DPU
Time to Stabilize Analog Stage
from ADC Off to ADC On
from ADC Off to ADC On
(
—
—
20
s
)
Note 1:
Device is functional at V
BORMIN
< V
DD
< V
DDMIN
, but will have degraded performance. Device functionality
is tested, but not characterized. Analog modules (ADC, op amp/comparator and comparator voltage
reference) may have degraded performance. Refer to Parameter
reference) may have degraded performance. Refer to Parameter
in
for the minimum
and maximum BOR values.
2:
Parameters are characterized but not tested in manufacturing.
3:
Because the sample caps will eventually lose charge, clock rates below 10 kHz may affect linearity
performance, especially at elevated temperatures.
performance, especially at elevated temperatures.
4:
for configuration information.
5:
for configuration information.
6:
The parameter, t
DPU
, is the time required for the ADC module to stabilize at the appropriate level when the
module is turned on (ADON (AD1CON1<15>) = 1). During this time, the ADC result is indeterminate.