M1AFS600-PQ208 Datasheet, PDF (108/334 Pages) Microsemi Corporation – Fusion Family of Mixed Signal FPGAs

Device Architecture
Table 2-37 • Recommended Resistor for Different Current Range Measurement
Current Range
Recommended Minimum Resistor Value (Ohms)
> 5 mA – 10 mA
10 – 20
> 10 mA – 20 mA
5 – 10
> 20 mA – 50 mA
2.5 – 5
> 50 mA – 100 mA
1–2
> 100 mA – 200 mA
0.5 – 1
> 200 mA – 500 mA
0.3 – 0.5
> 500 mA – 1 A
0.1 – 0.2
>1A–2A
0.05 – 0.1
>2A–4A
0.025 – 0.05
>4A–8A
0.0125 – 0.025
> 8 A – 12 A
0.00625 – 0.02
0 to
R_SENSE
I
–10.5 V
AVx
ACx
CMSTBx
Current Monitor
10 X
VADC to Analog MUX
(see Table 2-36
for MUXchannel
number)
Figure 2-73 • Negative Current Monitor
Terminology
Accuracy
The accuracy of Fusion Current Monitor is ±2 mV minimum plus 5% of the differential voltage at the
input. The input accuracy can be translated to error at the ADC output by using EQ 4. The 10 V/V gain is
the gain of the Current Monitor Circuit, as described in the "Current Monitor" section on page 2-89. For 8-
bit mode, N = 8, V_AREF= 2.56 V, zero differential voltage between AV and AC, the Error (E_ADC) is equal to
2 LSBs.
E_ADC = 2mV + 0.05 V_AV – V_AC   10V  V  _V-----_A-²--_R-^N---_E---_F--
EQ 4
where
N is the number of bits
V_AREF is the Reference voltage
V_AV is the voltage at AV pad
V_AC is the voltage at AC pad
2-92
Revision 4