tza3047a NXP Semiconductors, tza3047a Datasheet - Page 17

• Manufacturer Part Number: tza3047a
• Description: 30 Mbits/s Up To 1.25 Gbits/s Laser Drivers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
12.1.4
The alarm threshold I
determined by the source current I
pin. The current range for I
which corresponds with an I
The I
source or by connecting R
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:
2003 Jun 05
I
I
I
oper(alarm)
oper TZA3047A
oper TZA3047B
30 Mbits/s up to 1.25 Gbits/s laser drivers
MAXOP
A
LARM OPERATING CURRENT
=
current can be sunk by an external current
N
MAXOP
=
=
I
I
BIAS
BIAS
oper(alarm)
+
V
--------------------
R
I
--------- -
MAXOP
MAXOP
mod
MAXOP
MAXOP
2
oper(alarm)
on the operating current is
handbook, halfpage
to ground:
is from 10 to 200 A
t PWA
MAXOP
(ps)
100
100
from 7.5 to 150 mA.
0
of the MAXOP
Fig.6 Pulse width adjustment.
6.7
10
17
12.1.5
The alarm threshold I
determined by the source current I
MAXMON pin. The current range for I
10 to 200 A which corresponds with an I
150 to 3000 A. The I
external current source or by connecting R
ground:
12.1.6
The pulse width adjustment time is determined by the
value of resistor R
The t
corresponds with a R
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 function.
I
t
R PWA (k )
MON(alarm)
PWA
PWA
=
200
A
P
range is from 100 to +100 ps which
LARM MONITOR CURRENT
ULSE WIDTH ADJUSTMENT
=
20
N
R
------------------------------------ -
MAXMON
PWA
MGT893
PWA
R
PWA
–
TZA3047A; TZA3047B
PWA
MON(alarm)
MAXMON
, as shown below.
10 k
V
------------------------
R
range between a minimum
PWA
MAXMON
MAXMON
[ps]
current can be sunk by an
equals 0 ps for a disabled
on the monitor current is
MAXMON
Product specification
MAXMON
MON(alarm)
MAXMON
of the
is from
to
from