afs600 Actel Corporation, afs600 Datasheet - Page 95

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

Current Monitor
The Fusion Analog Quad is an excellent element for
voltage-
addition to supporting the same functionality offered by
the AV pad, the AC pad can be configured to monitor
current across an external sense resistor
support this current monitor function, a differential
amplifier with 10x gain passes the amplified voltage
drop between the AV and AC pads to the ADC. The
Figure 2-70 • Analog Quad Current Monitor Configuration
Off-Chip
On-Chip
Pads
and
Power
AV
current-monitoring
Digital
Prescaler
Input
Monitor Block
Voltage
(DAVOUTx)
To FPGA
To Analog MUX
Monitor / Instr
applications.
(Figure
AC
Amplifier
Prescaler
Digital
Current
Input
Monitor Block
2-70). To
(DACOUTx)
Current
To FPGA
Analog Quad
A d v an c ed v1 . 4
To Analog MUX
In
amplifier enables the user to use very small resistor
values, thereby limiting any impact on the circuit. This
function of the AC pad does not limit AV pad operation.
The AV pad can still be configured for use as a direct
voltage input or scaled through the AV prescaler
independently of it’s use as an input to the AC pad’s
differential amplifier.
Gate Driver
From FPGA
(GDONx)
MOSFET
Power
AG
Driver
Gate
Actel Fusion Programmable System Chips
AT
Temperature
Digital
Input
Monitor
Prescaler
Monitor Block
Temperature
(DATOUTx)
To FPGA
To Analog MUX
2-81