Datasheet

PIC32MX3XX/4XX
DS61143H-page 182 © 2011 Microchip Technology Inc.
TABLE 29-36: ANALOG-TO-DIGITAL CONVERSION TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp
Param.
No.
Symbol Characteristics Min. Typical
(1)
Max. Units Conditions
Clock Parameters
AD50 TAD Analog-to-Digital Clock Period 65 — — ns See Table 29-35 and
Note 2
AD51
TRC Analog-to-Digital Internal RC
Oscillator Period
— 250 — ns See Note 3
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 TAD ———TSAMP must be ≥ 132
ns.
Timing Parameters
AD60
TPCS Conversion Start from Sample
Trigger
— 1.0 TAD — — Auto-Convert Trigger
(SSRC<2:0> = 111)
not selected.
See Note 3
AD61
TPSS Sample Start from Setting
Sample (SAMP) bit
0.5 TAD — 1.5 TAD ——
AD62
TCSS Conversion Completion to
Sample Start (ASAM = 1)
— 0.5 TAD ——See Note 3
AD63
TDPU Time to Stabilize Analog Stage
from Analog-to-Digital OFF to
Analog-to-Digital ON
——2μsSee Note 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: Characterized by design but not tested.