tza3050 NXP Semiconductors, tza3050 Datasheet - Page 13

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

Philips Semiconductors
9397 750 14806
Product data sheet
For direct setting of bias and modulation currents, the BIASIN and MODIN voltages have
to be applied by external voltage sources or by external resistors R
connected to the BIASIN and MODIN pins:
I
I
The transconductance g
the modulation current.
The bias and modulation current sources operate with an input voltage range from 0.5 V
to 1.5 V. The output current is at its minimum level for an input voltage below 0.4 V;
see
load is not zero, the relation between I
BIAS
mod
Fig 3. Bias current as function of BIASIN voltage
Fig 4. Modulation current as a function of MODIN voltage
Figure 3
= (R
= (R
LA current when LA output is on
V
MODIN
BIASIN
o(LA)
and
= V
CCO
100 A
100 A
Figure
I
mod
I
(mA)
BIAS
(mA)
Rev. 03 — 7 April 2005
m(mod)
= I
100
4. The graphs indicate the values with a load of 0 . When the
0.2
o(LA)
0.5 V)
105
0
0.5 V)
5
0
I
defines the relation between the voltage on pin MODIN and
BIAS(min)
I
30 Mbits/s up to 1.25 Gbits/s burst mode laser driver
o(LA)(min)
g
g
m(mod)
m(bias)
0.5
o(LA)
0.5
100 mA/V
g
m(bias)
and I
+ 5 [mA]
100 mA/V
g
[mA]
m(mod)
=
V
mod
BIASIN
=
V
is given in
MODIN
(V)
(V)
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
1.5
mce136
Table
1.5
mgt891
BIASIN
5,
TZA3050
Table note
and R
MODIN
3.
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