Datasheet

1069
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
2. The calculated tracking time (t
TRACK
) is higher than 15 t
CP_ADC
.
Set TRANSFER = 1 and TRACTIM = 0.
In this case, a timer will trigger the ADC in order to set the correct sampling rate according to the track time.
The maximum possible sampling frequency will be defined by t
TRACK
in nanoseconds, computed by the previous formula
but with minus 15 × t
CP_ADC
and plus TRANSFER time.
 10-bit mode: 1/f
S
= t
TRACK
- 15 × t
CP_ADC
+ 5 t
CP_ADC
 12-bit mode: 1/f
S
= t
TRACK
- 15 × t
CP_ADC
+ 5 t
CP_ADC
Note: Csample and Ron are taken into account in the formulas.
Note: 1. Input voltage range can be up to VDDIN without destruction or over-consumption.
If VDDIO < V
ADVREF
max input voltage is VDDIO.
Table 43-39. Analog Inputs
Parameter Min Typ Max Units
Input Voltage Range 0 — V
ADVREF
Input Leakage Current — — ±0.5 μA
Input Capacitance — — 8 pF