afs600 Actel Corporation, afs600 Datasheet - Page 122

• Manufacturer Part Number: afs600
• Description: Actel Fusion Programmable System Chips Mixed-signal Family With Optional Arm Support
• Manufacturer: Actel Corporation

Table 2-49 • Calibrated Analog Channel Accuracy
Table 2-50 • Analog Channel Accuracy: Monitoring Standard Positive Voltages
2 -1 0 8
Analog Pad
AV, AC
AT
AV, AC
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
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.
15
14
12
5
3.3
2.5
1.8
1.5
1.2
0.9
Notes:
1. Requires enabling Analog Calibration in the Actel tool flow.
2. Direct ADC mode using an external VAREF of 2.56V±4.6mV, without Analog Calibration macro.
3. For input greater than 2.56 V, the ADC output will saturate. A higher VAREF or prescaler usage is recommended.
Input Voltage
Actel Fusion Programmable System Chips
LSB count by 4. Overall accuracy remains the same.
(V)
Negative Range
Positive Range
Worst-Case Industrial Conditions, T
Typical Conditions, T
Prescaler Range (V)
16 V (AT)
1
1
1
2
2
3
4
5
7
9
Calibrated Typical Error per Positive Prescaler Setting
16
16
16
8
4
2
1
4
8
4
2
1
16 V (12 V)
(AV/AC)
A
= 25°C
1
2
2
2
4
5
6
9
8 V (AV/
Input Voltage
AC)
–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
A
1
1
1
1
2
2
4
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
Condition
1,2,3
= 85°C
A d v a n c e d v 1 . 4
4 V (AT)
1
1
1
2
2
3
4
(V)
4 V (AV/
Negative Max.
AC)
1
1
1
2
2
3
–16
–6
–6
–7
–7
–6
–5
–7
–7
–7
–7
–7
2 V (AV/
AC)
Total Channel Error (LSB)
1
1
1
1
1
ADC in 10-Bit Mode
ADC in 10-Bit Mode
(%FSR)
1 V (AV/
Median
AC)
–1
–1
–1
–1
–2
–2
–1
1
1
0
0
0
1
VAREF = 2.56 V
Direct ADC
Positive Max.
(%FSR)
1
1
1
1
1
20
6
6
7
7
6
5
7
9
7
9
7
2,3