AK2571 Datasheet, PDF (51/52 Pages) Asahi Kasei Microsystems – Single-Chip Automatic Power/Temperature Control for WDM Laser Diodes

AKM Confidential
AK2571
43
DVSS
GND for digital circuit
44
EEP
“H” output when the AK2571 is in EEPROM mode.
45
STATUS_MO MonitorstheAK2571status.
N
46
TIMERALM Timer ALM. Outputs an alarm if the AK2571 doesn’t enter normal
operating mode within the settling period.
47
OPALM
Loss of power. Outputs an alarm if the voltage from PDIN is below the
threshold.
48
CUALM
Compensation current over alarm. Outputs an alarm if the
compensation current for aging is over the threshold.
49
TEMPALM Temperature alarm. Output alarm if voltage of TEMPIN is over the
threshold.
50
PIDALM
PID control ALM. Output alarm if current for TEC control is over the
threshold.
51
WLALM
Target temperature shift alarm. Output alarm if the value of target
temperature shift is over the threshold.
52
NC
NC pin. Connect to GND.
53
COOLP
P-CH FET control signal for TEC. PID control directs for cooling, it
becomes Low.
54
HEATN
N-CH FET control signal for TEC. PID control directs for heating, it
becomes High. PWM way selected as TEC control, switch corresponding
to PID control value and PWM division value.
55
NC
NC pin. Connect to GND.
56
TVSS
GND for P-CH/N-CH control signal
57
TVDD
GND for P-CH/N-CH control signal
58
NC
NC pin. Connect to GND.
59
COOLN
N-CH FET control signal for TEC. PID control directs for cooling, it
becomes High. PWM way selected as TEC control, switch corresponding
to PID control value and PWM division value.
60
HEATP
P-CH FET control signal for TEC. PID control directs for heating, it
becomes Low.
61
BVSS
GND for substrate
62
L3VDD
Voltage supply for I-DAC4
63
NC
NC pin. Connect to GND.
64
TEST2
AKM Test pin. Connect to GND in ordinary usage.
<Rev. 0.6E Preliminary>
-51-
2001/11