UX 2210
155Mbps to 2Gbps Laser Driver
Features
General Description
+3.0V to +5.5V Supply Voltage
Automatic Power Control .
Temperature-Compensated Modulation
Current
The UX2210 is a complete CMOS laser driver for
155Mbps to 2Gbps.It consists of a bias current
generator with automatic power control (APC), a
modulation current driver and a reference
Programmable slow start
voltage
generator
with
temperature
Rise and Fall Times less than 250ps
Apply to FP、DFB、VCSEL Laser
compensation. The UX2210 accepts differential
PECL inputs and provides complementary output
currents. The APC feature allows an optical
transmitter to maintain constant average optical
power by a monitor photodiode, despite changes
in laser efficiency with temperature and lifetime.
A temperature stabilized reference voltage is
provided to simplify laser current programming.
Utilizing a resistor at the IMODTC pin can
compensate the reduction in slope efficiency of
typical laser diodes caused by increased
temperature.
Pin Configuration
24 23 22 21 20 19
ENBP
VREF1
1
2
3
4
5
6
18 FAILOUT
17 IPINSET
16 VREF2
15 SLWSTRT
14 IPIN
OSADJ
UX2210
IBIASFB
IBIASSET
IMODSET
13 VCCA
7
8
9
10 11 12
Figure 1. Pin Configuration QFN 24
Typical Application Circuit
Figure 2. Typical Application Circuit
2006 Preliminary Datasheet
www.uxfastic.com
1
