Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

AD96606 Datasheet(PDF) 8 Page - Analog Devices

Part # AD96606
Description  200 MHz Laser Diode Driver with Light Power Control
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD96606 Datasheet(HTML) 8 Page - Analog Devices

Back Button AD96606 Datasheet HTML 4Page - Analog Devices AD96606 Datasheet HTML 5Page - Analog Devices AD96606 Datasheet HTML 6Page - Analog Devices AD96606 Datasheet HTML 7Page - Analog Devices AD96606 Datasheet HTML 8Page - Analog Devices AD96606 Datasheet HTML 9Page - Analog Devices AD96606 Datasheet HTML 10Page - Analog Devices AD96606 Datasheet HTML 11Page - Analog Devices AD96606 Datasheet HTML 12Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 8 / 12 page
background image
REV. 0
–8–
AD9660
Initial calibration is required after power-up or any other time
the laser has been disabled. Disabling the AD9660 drives the
hold capacitors back down to VREF. In this case, or in any case
where the output current is more than 10% out of calibration, R
will range from 300
Ω to 550 Ω for the model above; the higher
value should be used for calculating the worst case calibration
time. Following the example above, if CHOLD were chosen as
4.5 nF, then
τ = RC = 550 Ω × 4.5 nF would be 2.5 µs. For an
initial calibration error <1%, the initial calibration time should
be >5
τ = 12.4 µs.
Initial calibration time will actually be better than this calcula-
tion indicates, as a significant portion of the calibration time will
be within 10% of the final value, and the output resistance in
the AD9660’s T/H decreases as the hold voltage approaches its
final value.
Recalibration is functionally identical to initial calibration, but
the loop need only correct for droop. Because droop is assumed
to be a small percentage of the initial calibration (<10%), the
resistance for the model above will be in the range of 75
Ω to
140
Ω. Again, the higher value should be used to estimate the
worst case time needed for recalibration.
Continuing with the example above, since the error during hold
time was chosen as 5%, we meet the criteria for recalibration
and
τ = RC = 140 Ω × 4.5 nF = 0.63 µs. To get a final error of
1% after recalibration, the 5% droop must be corrected to
within a 20% error (20%
× 5% = 1%). A 2τ recalibration time
of 1.26
µs is sufficient.
Continuous Recalibration
In applications where the hold capacitor is small (<500 pF) and
the WRITE PULSE signals always have a pulse width >25 ns,
the user may continuously calibrate the write loop. In such an
application, the WRITE CAL signal should be held logic
HIGH, and the WRITE PULSE signal will control write loop
calibration via the internal AND gate.
The bias loop may be continuously recalibrated whenever
WRITE PULSE is logic LOW.
Using this model, the voltage at the hold capacitor is
VC
HOLD
= V
t
= 0 + (Vt =∞ − Vt = 0)1 − e
−t
τ


where t0 is when the calibration begins (WRITE CAL or BIAS
CAL goes logic HIGH), Vt = 0 is the voltage on the hold cap at
t = 0, Vt = ∞ is the steady state voltage at the hold cap with the
loop closed, and
τ = R
CHOLD is the time constant. With this
model the error in VC
HOLD
for a finite calibration time, as com-
pared to Vt = ∞, can be estimated from the following table and
chart:
Table II.
tCALIBRATION
% Final Value
Error %
7
τ
99.9
0.09
6
τ
99.7
0.25
5
τ
99.2
0.79
4
τ
98.1
1.83
3
τ
95.0
4.97
2
τ
86.5
13.5
τ
63.2
36.8
CALIBRATION TIME – Time Constants =
100
30
0
05
1
24
20
10
3
40
50
60
70
80
90
Figure 8. Calibration Time Curve


Similar Part No. - AD96606

ManufacturerPart #DatasheetDescription
logo
Analog Devices
AD96606 AD-AD96606_15 Datasheet
190Kb / 12P
   200 MHz Laser Diode Driver with Light Power Control
REV. 0
More results

Similar Description - AD96606

ManufacturerPart #DatasheetDescription
logo
Analog Devices
AD9660 AD-AD9660 Datasheet
256Kb / 12P
   200 MHz Laser Diode Driver with Light Power Control
REV. 0
AD96606 AD-AD96606_15 Datasheet
190Kb / 12P
   200 MHz Laser Diode Driver with Light Power Control
REV. 0
AD9661A AD-AD9661A Datasheet
174Kb / 12P
   Laser Diode Driver with Light Power Control
REV. 0
AD9661A AD-AD9661A_15 Datasheet
626Kb / 12P
   Laser Diode Driver with Light Power Control
REV. 0
logo
Vitesse Semiconductor C...
VSC7938 VITESSE-VSC7938 Datasheet
213Kb / 16P
   Laser Diode Driver with Automatic Power Control
VSC7939 VITESSE-VSC7939 Datasheet
226Kb / 18P
   Laser Diode Driver with Automatic Power Control
logo
List of Unclassifed Man...
I7032 ETC2-I7032 Datasheet
495Kb / 14P
   200 Mbps Laser-Diode Driver
logo
Vitesse Semiconductor C...
VSC7940 VITESSE-VSC7940 Datasheet
167Kb / 16P
   SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control
logo
Renesas Technology Corp
ISL58792 RENESAS-ISL58792 Datasheet
788Kb / 16P
   Laser Diode Driver with Serial Control and Write Current DAC
logo
Intersil Corporation
ISL58781 INTERSIL-ISL58781 Datasheet
404Kb / 15P
   Laser Diode Driver with Serial Control and Write Current DAC
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com