PIC32MX440F256H-80I Datasheet, PDF (625/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
TABLE 30-35: 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⁾
75
—
—
nsec TPB = 75 nsec,
AVDD = 3.0V
AD51 TRC
A/D Internal RC Oscillator Period —
250
—
nsec See Note 3
Conversion Rate
AD55 TCONV Conversion Time
—
12 TAD
—
—
—
AD56 FCNV
Throughput Rate
(Sampling Speed)
—
—
500 KSPS AVDD = 3.0V to 3.6V
—
—
400 KSPS AVDD = 2.5V to 3.6V
AD57 TSAMP Sample Time
1
—
31
TAD TSAMP must be ≥ 140
nsec
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
0.5 TAD
—
1.5 TAD —
—
Sample (SAMP) bit
AD62 TCSS Conversion Completion to
—
0.5 TAD
—
—
—
Sample Start (ASAM = 1)⁽³⁾
AD63 TDPU Time to Stabilize Analog Stage
—
—
2
μs
—
from A/D OFF to A/D ON⁽³⁾
Note 1:
2:
3:
These parameters are characterized but not tested in manufacturing.
Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity
performance, especially at elevated temperatures.
Characterized by design but not tested.
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 623