AK2573A Datasheet, PDF (20/38 Pages) Asahi Kasei Microsystems – 125M / 156M Laser Diode Driver + APC

ASAHI KASEI
[AK2573A]
4.3 Temperature Sensor (TEMPSENS)
Fig 4-11 shows an on-chip temperature sensor characteristics and Table 4-9 shows the relationship between detected
temperature and ADC code.
Fig 4-11 On-chip Temperature Sensor Characteristics
On-chip Temperature sensor characteristics
2.5
2.0
1.5
1.0
0.5
0.0
-40
-20
0
20
40
60
80
Temperature t [°C]
(1) Slope: -11.56mV/℃ (typ)
(2) V(t) = -0.01156 * t + 1.62 [V] (typ)
(3) AD_code = int( V(t) / 2.2 * 127 +0.5) = int(-0.667*t + 94.0)
(4) Temperature step @ AD_code=1LSB: 1.49℃/LSB
100 120
* Temperature sensor detects the junction temperature, not LD or ambient temperature.
<MS0189-E-01>
-20-
2004/5