AKM Confidential
AK2571
4. ATC (Automatic Temperature Compensation)
Figure 4-1 ATC Block diagram
OFFSET voltage
(R_ATC_OFFSET)
PID
TEC_
CTRL
Regulator
Gain &
Offset
HEATP
COOLP
HEATN
COOLN
Rth
RL
ADC
Initial temperature
Target
(E_ATC_TRGT)
TEMPALM
COMP
Temperature alarm
threshold
(E_TMPRTALM_WIN)
PIDALM
COMP
PID ALM
threshold
(E_PIDALM_SET)
TEMPALM
PIDALM
-
LD ageing error
current
(R_APC_CMPNST)
ATC_FB
ATC feed back
(R_ATC_CMPNST)
WLALM
COMP
ATC Feed back Alarm
(E_WLALM_SET)
WLALM
I-DAC4H
IOUT4C
REFOUT
TEMPIN
TEC
control
vtemp
I-DAC4C
IOUT4H
Temperature Target
(R_TMPRT__TRGT)
Parameter of ATC
feed back
(E_ATC_FB_SET)
Non sensed
value(E_PID_INACT)
PID max value(E_PID_MAX)
PID parameter
(E_PID_P,E_PID_I,E_PID_D)
TEC control way
(E_TEC_CTRL_SET)
(E_TEC_ANALOG)
PWM devision
(R_TEC_PWM_SET)
ALM polarity
(R_ALM_POL)
ALM polarity
(R_ALM_POL)
PID control
(R_PID_VALABS)
ALM polarity
(R_ALM_POL)
ATC_
LOCK
ATC_LOCK set
(E_LK_TMPRT_WIN)
-
Detect term set
(E_LK_CNT_SET)
Temperature data
(R_TMPRT_CRNT)
TECcontrol way
(E_TEC_CTRL_SET, E_TEC_ANALOG)
TECcontrol way
(E_TEC_CTRL_SET, E_TEC_ANALOG)
<Rev. 0.6E Preliminary> -14-
2001/11
