ASAHI KASEI
[AK2572]
Ⅵ. EXTERNAL CIRCUIT EXAMPLE
Recommended External Circuit
LDD
LD
Voltage Output
(VDAC3)
Current
Output
(IDAC2)
Current
Output
(IDAC1)
Cvout
Rvout
C13
C23
VDD=3.3V[typ]
Monitor PD
C14 C24
Cpd
Rpd
PDMON
TEMPMON
BIAS
BIASMON
LDD
Current Output
(BIASMON)
PDIN
AVSS
AVDD
TXDIS
BURST
SCL
R11
C22 C12
EXTALM1
R23
AK2572
Extalm1
EXTALM2/MOD_CTRL
Extalm2/Mod_ctrl
Open
Tx_disable
Burst
TEST4
WP
Mod_def1
R21
R22
C21
C11
* When Write Protect is Released :
WP-pin is left Open or connected
to DVDD (Set R_WP_CTRL='0')
Mod_def2
Tx_fault
* When Write Protect is Established :
WP-pin is left Open (Set R_WP_CTRL='1')
or connected to DVSS
VSS=0V
R11=12kΩ±1%
fpd=1/(2π*Rpd*Cpd)=5kHz～10kHz
Rvout=1kΩ
Connection of Unused pins :
R21=R22=R23=4.7kΩ～10kΩ
C11=C12=C13=C14=0.1μF
BURST=VSS EXTALM1=VSS
Cvout=0.01μF
TXDIS=VSS EXTALM2/MOD_CTRL=VSS
PDIN=VSS
C21=C22=C23=C24=0.01μF or 0.001μF
-47-
< MS0290-E-01>
2004/8
AKM [ ASAHI KASEI MICROSYSTEMS ]
