M1AFS600-PQ208 Datasheet, PDF (111/334 Pages) Microsemi Corporation – Fusion Family of Mixed Signal FPGAs

Fusion Family of Mixed Signal FPGAs
Temperature Monitor
The final pin in the Analog Quad is the Analog Temperature (AT) pin. The AT pin is used to implement an
accurate temperature monitor in conjunction with an external diode-connected bipolar transistor
(Figure 2-76). For improved temperature measurement accuracy, it is important to use the ATRTN pin for
the return path of the current sourced by the AT pin. Each ATRTN pin is shared between two adjacent
Analog Quads. Additionally, if not used for temperature monitoring, the AT pin can provide functionality
similar to that of the AV pad. However, in this mode only positive voltages can be applied to the AT pin,
and only two prescaler factors are available (16 V and 4 V ranges—refer to Table 2-57 on page 2-133).
Off-Chip
Pads
On-Chip
AV
Voltage
Monitor Block
Prescaler
AC
Current
Monitor Block
Analog Quad
Prescaler
AG
Gate
Driver
Discrete
Bipolar
Transistor
AT
ATRTN
Temperature
Monitor Block
Prescaler
Digital
Input
Digital
Input
Current
Monitor / Instr
Amplifier
Power
MOSFET
Gate Driver
To FPGA
(DAVOUTx)
To Analog MUX
To FPGA
(DACOUTx)
From FPGA
(GDONx)
To Analog MUX
Figure 2-76 • Temperature Monitor Quad
Digital
Input
Temperature
Monitor
To FPGA
(DATOUTx)
To Analog MUX
Revision 4
2- 95