EVAL-ADN2531-NPZ AD [Analog Devices], EVAL-ADN2531-NPZ Datasheet - Page 17

• Manufacturer Part Number: EVAL-ADN2531-NPZ
• Description: 11.3 Gbps, Active Back-Termination, Differential Laser Diode Driver
• Manufacturer: AD [Analog Devices]

The value of K depends on th
and can be obtained from Figure 35. For a TOSA resistance of
12 Ω, the typical value of K is 110 mA/V. Assuming that I
40 mA and using the preceding equation, the MSET voltage is
given by
The MSET voltage range can be calculated using the required
I
values can be obtained from the minimum and maximum
curves in Figure 35.
IBIAS Monitor Accuracy Calculations
MOD
range and the minim
V
MSET
6
5
4
3
2
1
0
0
=
I
110
MOD
Figure 41. Accuracy of I
20
mA/V
(mA)
um and maximum K values. These
=
40
110
40
e actual resistance of the TOSA
I
BIAS
=
(mA)
. 0
BIAS
36
60
to I
V
BMON
Ratio
80
100
MOD
Rev. 0 | Page 17 of 20
=
This example assumes that the nominal value of I
and that the I
80 mA. The accuracy of the I
and is plotted in Fig
Referring to Figur
±4.3% for the mini
max
The accuracy of the IBMON output current as a perc
the nominal I
for the minimum I
for the maximum I
for the IBMON output current of ±6.0% of the nominal I
value over all operating conditions. The IBMON output curr
accuracy numbers can b
for t
sources to cal ulate an overall accuracy for the IBMON
he 750 Ω IBMON resistor (R
imum I
IBMON
IBMON
BIAS
BIAS
c
BIAS
_
_
value of 80 mA.
Accuracy
Accuracy
range for all operating conditions is 10 mA to
is given by
e
BIAS
mum I
BIAS
41, t e IBMON outpu urren
ure 4 .
value, and by
value. This gives a worse-case accuracy
h
e combined with the accuracy numbers
1
MIN
MAX
BIAS
BIAS
of 10 mA and ±3.0% for the
=
=
10
80
to I
IBMON
mA
mA
BMON
) a
100
4
100
3
3 .
0 .
nd any other error
ratio is given in Tabl
t c
×
×
40
40
100
100
mA
mA
BIAS
t accuracy is
ADN2531
=
is 40 mA
entage of
=
±
±
voltage.
. 1
6
BIAS
075
0 .
%
ent
e 1
%