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參數(shù)資料
| 型號(hào)： | TZA3019CVH |
| 英文描述： | TRANSIL |
| 中文描述： | 特定應(yīng)用功放|雙| LLCC | 32腳|塑料 |
| 文件頁(yè)數(shù)： | 17/28頁(yè) |
| 文件大小： | 138K |
| 代理商： | TZA3019CVH |
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2003 Apr 02
17
Philips Semiconductors
Product specification
30 Mbits/s up to 3.2 Gbits/s
A-rate
TM
laser drivers
TZA3011A; TZA3011B
12.1.4
A
LARM OPERATING CURRENT
The alarm threshold I
oper(alarm)
on the operating current is
determined by the source current I
MAXOP
of the MAXOP
pin. The current range for I
MAXOP
is from 10 to 200
μ
A
which corresponds with an I
oper(alarm)
from 7.5 to 150 mA.
The I
MAXOP
current can be sunk by an external current
source or by connecting R
MAXOP
to ground:
The operating current equals the bias current for an
AC-coupled laser application and equals the bias current
plus half of the modulation current for the DC-coupled
laser application:
12.1.5
A
LARM MONITOR CURRENT
The alarm threshold I
MON(alarm)
on the monitor current is
determined by the source current I
MAXMON
of the
MAXMON pin. The current range for I
MAXMON
is from
10 to 200
μ
A which corresponds with an I
MON(alarm)
from
150 to 3000
μ
A. The I
MAXMON
current can be sunk by an
external current source or by connecting R
MAXMON
to
ground:
12.1.6
P
ULSE WIDTH ADJUSTMENT
The pulse width adjustment time is determined by the
value of resistor R
PWA
, as shown below.
[ps]
The t
PWA
range is from
100 to +100 ps which
corresponds with a R
PWA
range between a minimum
resistance of 6.7 k
and a maximum resistance of 20 k
.
The PWA function is disabled when the PWA input is
short-circuited to ground; t
PWA
equals 0 ps for a disabled
PWA function.
I
oper(alarm)
N
MAXOP
V
MAXOP
R
×
=
I
oper TZA3011A
)
I
BIAS
=
I
oper TZA3011B
)
I
BIAS
I
2
----------
+
=
I
MON(alarm)
N
MAXMON
V
R
MAXMON
------------------------
×
=
t
PWA
200
R
------------------------------------
10 k
–
R
PWA
×
=
MGT893
handbook, halfpage
RPWA (k
)
tPWA
(ps)
100
0
100
20
10
6.7
Fig.6 Pulse width adjustment.
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