Chapter 16:Programmable Power and Temperature-Sensing Diodes in Stratix III Devices

Temperature Sensing Diode

Figure16–1 shows an example of power management for Stratix III devices.

Figure16–1.Stratix III Power Management Example (Note1), (2)

Notes to Figure16–1:

(1)When V CCL = 0.9V, you need a separate voltage regulator.

(2)When V CCL = 0.9V, V CCPT and V CC must be ramped before V CCL to minimize V CCL standby current during V CCPT and V CC ramping to full rail.

Temperature Sensing Diode

Knowing the junction temperature is crucial for thermal management. A Stratix III

device monitors its die temperature with an embedded temperature sensing diode

(TSD). This is done by sensing the voltage level across the TSD. Each temperature

level produces a unique voltage across the diode. Use an external analog-to-digital

converter that measures the voltage difference across the TSD and then converts it to a

temperature reading.

Stratix III Device Handbook, Volume 1