ds1861 Maxim Integrated Products, Inc., ds1861 Datasheet - Page 8

• Manufacturer Part Number: ds1861
• Description: Ds1861 Full Laser Control With Fault Management
• Manufacturer: Maxim Integrated Products, Inc.

Full Laser Control with Fault Management
Figure 3. TX-D Timing During Normal Operation
Figure 4. Detection of Transmitter Safety Fault Condition
8
_____________________________________________________________________
OCCURENCE
OF FAULT
I
I
MODSET
BIASSET
I
I
*TX-F WILL ASSERT IF THE HTXP ALARM IS TRIGGERED WHILE THE BIAS CURRENTS
ARE DISABLED. THE LTXP ALARM IS MASKED WHILE TX-D IS ASSERTED.
BIASSET
MODSET
TX-D
TX-F
TX-F
TX-D
*
t
t
OFF
OFF
t
t
t
FAULT
FAULT
FAULT
t
ON:M
t
ON:B
t
FIRST CONTROL LOOP ADJUSTMENT OF
I
INIT:M
MODSET
Timing Diagrams (continued)
AFTER TX-D IS DEASSERTED