CXA1782CQ/CR
Center Voltage Generation Circuit
(Single voltage application; Connect to GND when it’s positive/negative dual power supplies.)
Maximum current is approximately ±3mA. Output impedance is approximately 50Ω.
Vcc
VC
VC
50
48
VEE
APC Circuit
When the laser diode is driven with constant current, the optical output possesses large negative temperature
characteristics. Therefore, the current must be controlled with the monitor photo diode to ensure the output
remains constant.
Vcc
LD
33
Vcc
56k
1k
10µH
PD
34
10k
55k
10k
56k
10k
VREF
1.25V
VEE
VEE
VEE
GND
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