Datasheet

© 2010 Microchip Technology Inc. DS61156D-page 207
PIC32MX5XX/6XX/7XX
TABLE 31-38: A/D CONVERSION TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.5V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
Param.
No.
Symbol Characteristics Min. Typical
(1)
Max. Units Conditions
Clock Parameters
AD50 TAD A/D Clock Period
(2)
65 — — ns See Table 31-37
Conversion Rate
AD55 TCONV Conversion Time — 12 TAD —— —
AD56 F
CNV Throughput Rate
(Sampling Speed)
— — 1000 ksps AVDD = 3.0V to 3.6V
— — 400 ksps AV
DD = 2.5V to 3.6V
AD57 T
SAMP Sample Time 1 — 31 TAD TSAMP must be ≥ 132 ns
Timing Parameters
AD60 TPCS Conversion Start from Sample
Trigger
(3)
—1.0 TAD — — Auto-Convert Trigger
(SSRC<2:0> =
111)
not selected
AD61
TPSS Sample Start from Setting
Sample (SAMP) bit
0.5 TAD — 1.5 TAD ——
AD62
TCSS Conversion Completion to
Sample Start (ASAM =
1)
(3)
—0.5 TAD —— —
AD63
TDPU Time to Stabilize Analog Stage
from A/D Off to A/D On
(3)
—— 2μs—
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: Characterized by design but not tested.