參數(shù)資料
型號: AD9661A
廠商: Analog Devices, Inc.
英文描述: Laser Diode Driver with Light Power Control(帶光功率控制的激光二極管驅(qū)動(dòng)器)
中文描述: 激光二極管驅(qū)動(dòng)器,帶有光功率控制(帶光功率控制的激光二極管驅(qū)動(dòng)器)
文件頁數(shù): 9/12頁
文件大?。?/td> 184K
代理商: AD9661A
AD9661A
REV. 0
–9–
Choosing a hold caps based on this:
C
HOLD
=
18
×
10
±9
×
0.5
ms
266.6
μ
A
=
0.034
μ
F
T he initial calibration time for < 0.1% error:
7
τ =
7
×
RC
=
7
×
550
×
0.034
μ
F
=
130.9
μ
s
Recalibration for a 0.1% error after 2% droop (need to
correct within 5%):
3
τ
= 3 RC = 3
×
140
×
0.034
μ
F = 14.28
μ
s
From the monitor current specification and the max power
specified:
I
MONITOR MAX
=
4
mW
0.2
mA
mW
=
800
μ
A
and
R
GAIN
=
1.6
V
I
MONITOR MAX
±50
=
2.0
k
C
GAIN
would be chosen from the table as 3 pF for safe
compensation.
1ns/DIV
20ns/DIV
PULSE INPUT (TTL)
LASER POWER
20mV/DIV
LASER POWER
20mV/DIV
Figure 7. Driving 78N20 Laser Diode @ 5 mW
Typical Performance Characteristics
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