tza3050 NXP Semiconductors, tza3050 Datasheet - Page 5

• Manufacturer Part Number: tza3050
• Description: Tza3050 30 Mbits/s Up To 1.25 Gbits/s Burst Mode Laser Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7. Functional description
9397 750 14806
Product data sheet
7.1 Data and clock input
Table 2:
The TZA3050 operates with differential Positive Emitter Coupled Logic (PECL), Low
Voltage Positive Emitter Coupled Logic (LVPECL) and Current Mode Logic (CML) data
and clock inputs with a voltage swing from 100 mV to 1 V (p-p). It is assumed that both
data and clock inputs carry a complementary signal with the specified peak-to-peak value
(true differential excitation).
The circuit generates an internal common mode voltage for AC-coupled data inputs, clock
inputs and single-ended applications.
If V
‘one’ level of the laser.
Symbol
MAXMON
RREF
PWA
GND
LAQ
LAQ
LA
LA
GND
BIAS
V
MON
BIASIN
BIASOUT
MODIN
CBIAS
i.c.
AVR
CCO
DIN
> V
DINQ
Pin description
, the modulation current is sunk by pin LA and corresponds to an optical
Pin
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Rev. 03 — 7 April 2005
…continued
Description
threshold level input for alarm on monitor diode current
reference current input; must be connected to ground with an
accurate (1 %) 10 k resistor
pulse width adjustment input
ground
inverted laser modulation output (RF output); output for dummy
load
inverted laser modulation output (RF output); output for dummy
load
non-inverted laser modulation output (RF output); output for laser
non-inverted laser modulation output (RF output); output for laser
ground
current source output for the laser bias current
supply voltage for the output stage and the laser diode
input from the monitor photodiode (RF input)
input for the bias current setting
output of the control block for the bias current
input for the modulation current setting
output of the average loop; must be connected via a 100 nF
external capacitor to GND
internally connected
input for the optical average power level setting
30 Mbits/s up to 1.25 Gbits/s burst mode laser driver
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
TZA3050
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