Microhard Systems P900 - 12-Bit ADC Characteristics

© Microhard Systems Inc. Confidential 25
2.0 Hardware Description
NRST Pin Characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 2-7).
2.4.3.5 12-bit ADC Characteristics
The parameters given in Table 2-11: ADC Characteristics are derived from tests performed
under the ambient temperature and supply voltage ratings of the Pico Series.
Symbol Parameter Conditions Min Max Unit Typ
V
IL(NRST)
NRST Input low level voltage -0.5 0.7
V
V
IH(NRST)
NRST Input high level voltage
2 V
DD
+0.5
V
hys(NRST)
NRST Schmitt trigger voltage hysteresis mV 200
R
PU
Weak pull-up equivalent resistor V
IN
=V
SS
30 50 kΩ 40
V
NF
NRST Input pulse 300 ns
Table 2-12 NRST Pin Characteristics
Pico Series
Figure 2-3 Recommended NRST Pin Protection
Symbol Parameter Min Max Unit
V
AIN
Conversion voltage range 0 3.0 V
R
AIN
External input impedance
0 1.2 kΩ
Table 2-13 12-bit ADC Characteristics
Symbol Parameter Test Conditions Typ Max Unit
ET
Total unadjusted error
1.3 2
LSB T
A
= 25
O
C
EO
Offset error
1 1.5
EG
Gain error
0.5 1.5
ED
Differential linearity error
0.7 1
EL
Integral linearity error
0.8 1.5
Table 2-14 ADC Accuracy