User's Manual

DFZM-E72xx
Data Sheet Sheet 28 of 40 Sep 16, 2013
Proprietary Information and Specifications are Subject to Change
5-7.ADC Parameters
Test Conditions: T
A
=25 ºC, VCC=3.0V
Parameter Min Typ Max Unit
VREF 1.17 1.2 1.23
V
VREF output current 1
mA
VREF load capacitance 10
nF
External VREF voltage range 1.1 1.2 1.3
V
External VREF input impedance 1
MΩ
Minimum input voltage 0
V
Maximum input vlotage VREF
V
Single-ended signal range 0 VREF
V
Differential signal range -VREF +VREF
V
Common mode range 0 VREF
V
Input referred ADC offset -10 10
mV
Input Impedence
1MHz sample clock
6MHz sample clock
Not sample
1
0.5
10
MΩ
*Note: The signal-ended ADC measurements are limited in their range and only guaranteed for
accuracy within the limits shown in this table. The ADC's internal design allows for
measurements outside of this range (±200 mV), but the accuracy of such measurements is not
guaranteed. The maximum input voltage is of more interest to the differential sampling where a
differential measurement might be small, but a common mode can push the actual input voltage
on one of the signals towards the upper voltage limit.
Table 5-8: ADC Parameters