AD5255BRU250-RL7 Analog Devices Inc, AD5255BRU250-RL7 Datasheet - Page 19

• Manufacturer Part Number: AD5255BRU250-RL7
• Manufacturer: Analog Devices Inc

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
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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