Microchip Technology MA240017 Data Sheet

Page of 278
PIC24F16KA102 FAMILY
DS39927C-page 234
 2008-2011 Microchip Technology Inc.
TABLE 29-22: AC SPECIFICATIONS
TABLE 29-23: A/D CONVERSION TIMING REQUIREMENTS
(
)
 
Symbol
Characteristics
Min
Typ
Max
Units
T
LW
BCLKx High Time
20
T
CY
/2
ns
T
HW
BCLKx Low Time
20
(T
CY
 * BRGx) + T
CY
/2
ns
T
BLD
BCLKx Falling Edge Delay from UxTX
-50
50
ns
T
BHD
BCLKx Rising Edge Delay from UxTX
T
CY
/2 – 50
T
CY
/2 + 50
ns
T
WAK
Min. Low on UxRX Line to Cause Wake-up
1
s
T
CTS
Min. Low on UxCTS Line to Start 
Transmission
T
CY
ns
T
SETUP
Start bit Falling Edge to System Clock Rising 
Edge Setup Time
3
ns
T
STDELAY
Maximum Delay in the Detection of the 
Start bit Falling Edge
T
CY
 + T
SETUP
ns
A/D CHARACTERISTICS
Standard Operating Conditions: 1.8V 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
Max.
Units
Conditions
Clock Parameters
AD50
T
AD
A/D Clock Period
75
ns
T
CY
 = 75 ns, AD1CON3 
is in the default state
AD51
T
RC
A/D Internal RC Oscillator Period
250
ns
Conversion Rate
AD55
T
CONV
Conversion Time
12
T
AD
AD56
F
CNV
Throughput Rate
500
ksps
AV
DD
 
 2.7V
AD57
T
SAMP
Sample Time
1
T
AD
AD58
T
ACQ
Acquisition Time
750
ns
(Not
)
AD59
T
SWC
Switching Time from Convert to 
Sample
(Note 
AD60
T
DIS
Discharge Time
0.5
T
AD
Clock Parameters
AD61
T
PSS
Sample Start Delay from Setting 
Sample bit (SAMP)
2
3
T
AD
Note 1:
Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity 
performance, especially at elevated temperatures.
2:
The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale 
after the conversion (V
DD
 to V
SS
 or V
SS
 to V
DD
).
3:
On the following cycle of the device clock.