AFS090 datasheet(113/334 Pages) MICROSEMI

113 / 334 page

Fusion Family of Mixed Signal FPGAs

R e visio n 2

2 - 97

Terminology

Resolution

Resolution defines the smallest temperature change Fusion Temperature Monitor can resolve. For ADC

configured as 8-bit mode, each LSB represents 4°C, and 1°C per LSB for 10-bit mode. With 12-bit mode,

the Temperature Monitor can still only resolve 1°C due to Temperature Monitor design.

Offset

The Fusion Temperature Monitor has a systematic offset of +5°C, excluding error due board resistance

and ideality factor of the external diode, between the operation range of –40°C to +85°C. For instance,

25°C will be read by the Temperature Monitor as 30°C plus error. The user can remove any offset error

through hardware or software during the calibration routine.

The Fusion Temperature Monitor has a systematic offset (Table 2-49 on page 2-119), excluding error due

to board resistance and ideality factor of the external diode. Microsemi provides an IP block (CalibIP) that

is required in order to mitigate the systematic temperature offset. For further details on CalibIP, refer to

the "

Temperature, Voltage, and Current Calibration in Fusion FPGAs" chapter of the Fusion

FPGA Fabric User's Guide

AFS090 데이터시트(PDF) 113 Page - Microsemi Corporation