afs600 Actel Corporation, afs600 Datasheet - Page 92

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

The Analog Quad offers a wide variety of prescaling
options to enable the ADC to resolve the input signals.
Figure 2-67
a signal that is to be prescaled prior to conversion. The
ADC internal reference voltage and the prescaler factors
were selected to make both prescaling and postscaling of
the signals easy binary calculations (refer to
page 2-115
configured with a prescaler, there will be a 1 MΩ resistor
to ground. This occurs even when the device is in power-
down mode. In low power standby or sleep mode (V
OFF, V
used, analog inputs are pulled down to ground through a
Figure 2-67 • Analog Quad Prescaler Input Configuration
2 -7 8
Actel Fusion Programmable System Chips
Off-Chip
On-Chip
Pads
CC33A
shows the path through the Analog Quad for
is ON, V
for details). When an analog input pad is
AV
Digital
Prescaler
Input
CCI
Monitor Block
Voltage
is ON) or when the resource is not
(DAVOUTx)
To FPGA
To Analog MUX
Monitor / Instr
AC
Amplifier
Digital
Current
Prescaler
Input
Table 2-54 on
Monitor Block
(DACOUTx)
Current
To FPGA
Analog Quad
A d v a n c e d v 1 . 4
CC
To Analog MUX
is
1 MΩ resistor. The gate driver output is floating (or
tristated), and there is no extra current on V
These scaling factors hold true whether the particular
pad is configured to accept a positive or negative
voltage. Note that whereas the AV and AC pads support
the same prescaling factors, the AT pad supports a
reduced set of prescaling factors and supports positive
voltages only.
Typical scaling factors are given in
page
minimum and maximum) is in
Gate Driver
From FPGA
2-115, and the gain error (which contributes to the
MOSFET
(GDONx)
Power
AG
Driver
Gate
AT
Temperature
Digital
Input
Monitor
Table 2-46 on page
Prescaler
Monitor Block
Temperature
(DATOUTx)
To FPGA
To Analog MUX
Table 2-54 on
CC33A
.
2-102.