AD5255BRU250-RL7 Analog Devices Inc, AD5255BRU250-RL7 Datasheet - Page 19
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AD5255BRU250-RL7
Manufacturer Part Number
AD5255BRU250-RL7
Description
Manufacturer
Analog Devices Inc
Datasheet
1.AD5255BRU250-RL7.pdf
(20 pages)
Specifications of AD5255BRU250-RL7
Number Of Elements
3
Resistance (max)
250KOhm
Power Supply Requirement
Single/Dual
Interface Type
Serial (2-Wire/I2C)
Single Supply Voltage (typ)
5V
Dual Supply Voltage (typ)
±2.5V
Single Supply Voltage (min)
2.7V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
±2.2V
Dual Supply Voltage (max)
±2.7V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
24
Lead Free Status / RoHS Status
Not Compliant
APPLICATIONS
LASER DIODE DRIVER (LDD) CALIBRATION
The AD5255 can be used with any laser diode driver. Its high
resolution, compact footprint, and superior temperature drift
characteristics make it ideal for optical parameter setting.
The ADN2841 is a 2.7 Gbps laser diode driver that uses a
unique control algorithm to manage both the laser average
power and extinction ratio after initial factory calibration.
It stabilizes the laser data transmission by continuously
monitoring its optical power and by correcting the variations
caused by temperature and the laser degradation over time.
In the ADN2841, the I
Through its dual-loop power and extinction ratio control,
calibrated by the AD5255, the internal driver controls the
bias current I
regulates the modulation current, I
modulation current linearly with slope efficiency.
BIAS
and consequently the average power. It also
MPD
monitors the laser diode current.
MODP
, by changing the
Rev. A | Page 19 of 20
Any changes in the laser threshold current or slope efficiency
are, therefore, compensated. As a result, this optical supervisory
system minimizes the laser characterization efforts, enabling
designers to apply comparable lasers from multiple sources.
AD5255
SDA
SCL
Figure 33. Optical Supervisory System
PSET
ERSET
ASET
ADN2841
V
CC
V
CC
AD5255