U1AFS250-FG256 Datasheet, PDF (4/27 Pages) Actel Corporation – 3 - DC and Power Characteristics

DC and Power Characteristics
Table 3-3 • Input Resistance of Analog Pads
Pads
Pad Configuration
AV, AC Analog Input (direct input to ADC)
Analog Input (positive prescaler)
Analog Input (negative prescaler)
Digital input
Current monitor
AT
Analog Input (direct input to ADC)
Analog Input (positive prescaler)
Digital input
Temperature monitor
Prescaler Range
+16 V to +2 V
+1 V to +0.125 V
+16 V to +2 V
+1 V to +0.125 V
–16 V to –2 V
–1 V to –0.125 V
+16 V to +2 V
+16 V to +2 V
–16 V to –2 V
+16 V, +4 V
+16 V, +4 V
+16 V, +4 V
+16 V, +4 V
Input Resistance to Ground
1 MΩ (typical)
> 10 MΩ
1 MΩ (typical)
> 10 MΩ
1 MΩ (typical)
> 10 MΩ
1 MΩ (typical)
1 MΩ (typical)
1 MΩ (typical)
1 MΩ (typical)
1 MΩ (typical)
1 MΩ (typical)
> 10 MΩ
Table 3-4 • Overshoot and Undershoot Limits ¹
V_CCI
2.7 V or less
Average V_CCI–GND Overshoot or Undershoot
Duration as a Percentage of Clock Cycle²
10%
Maximum Overshoot/
Undershoot²
1.4 V
5%
1.49 V
3.0 V
10%
1.1 V
5%
1.19 V
3.3 V
10%
0.79 V
5%
0.88 V
3.6 V
10%
0.45 V
5%
0.54 V
Notes:
1. Based on reliability requirements at 85°C.
2. The duration is allowed at one cycle out of six clock cycle. If the overshoot/undershoot occurs at one out of
two cycles, the maximum overshoot/undershoot has to be reduced by 0.15 V.
3-4
Preliminary v0.4