Actel Fusion Mixed-Signal FPGAs
Table 2-49 • Calibrated Analog Channel Accuracy 1,2,3
Worst-Case Industrial Conditions, TA = 85°C
Condition
Total Channel Error (LSB)
Analog Pad
Prescaler Range (V)
Input Voltage4 (V)
Negative Max.
Median
Positive Max.
Positive Range
ADC in 10-Bit Mode
AV, AC
16
8
0.300 to 12.0
0.250 to 8.00
0.200 to 4.00
0.150 to 2.00
0.050 to 1.00
0.300 to 16.0
0.100 to 4.00
–6
–6
–7
–7
–6
–5
–7
1
6
6
7
7
6
5
7
0
4
–1
2
0
1
–1
AT
16
4
0
–1
Negative Range
ADC in 10-Bit Mode
AV, AC
16
8
–0.400 to –10.5
–0.350 to –8.00
–0.300 to –4.00
–0.250 to –2.00
–0.050 to –1.00
–7
–7
1
9
7
–1
–2
–2
–1
4
–7
9
2
–7
7
1
–16
20
Notes:
1. Channel Accuracy includes prescaler and ADC accuracies. For 12-bit mode, multiply the LSB count by 4. For
8-bit mode, divide the LSB count by 4. Overall accuracy remains the same.
2. Requires enabling Analog Calibration in the Actel tool flow.
3. Calibrated with two-point calibration methodology, using 20% and 80% full-scale points.
4. The lower limit of the input voltage is determined by the prescaler input offset.
Preliminary v1.7
2-121
ACTEL [ Actel Corporation ]
