ak2573a AKM Semiconductor, Inc., ak2573a Datasheet - Page 20

• Manufacturer Part Number: ak2573a
• Description: 125m / 156m Laser Diode Driver Apc - Asahi Kasei Microsystems
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
4.3 Temperature Sensor (TEMPSENS)
Fig 4-11 shows an on-chip temperature sensor characteristics and Table 4-9 shows the relationship between detected
Fig 4-11 On-chip Temperature Sensor Characteristics
(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
* Temperature sensor detects the junction temperature, not LD or ambient temperature.
<MS0189-E-01>
temperature and ADC code.
2.5
2.0
1.5
1.0
0.5
0.0
-40
-20
On-chip Temperature sensor characteristics
0
20
Temperature t [ C]
40
60
80
-20-
100
120
[AK2573A]
2004/5