ONET1101L Datasheet, PDF (2/26 Pages) Texas Instruments – 11.3 Gbps Laser Diode Driver

ONET1101L
SLLS883 – MARCH 2008
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
BLOCK DIAGRAM
Figure 1 shows a block diagram of the ONET1101L device. The laser driver consists of an equalizer, a limiter, an
output driver, DC offset cancellation with cross point control, power-on reset circuitry, a 2-wire serial interface
(including a control logic block and modulation current generator), a bias current generator and automatic power
control loop, and an analog reference block.
CP Adjust
DC Offset Cancellation
Equalizer
DIN+
DIN–
100 W
+
+
Boost
Limiter
Output Driver
MOD+
MOD–
SDA
SCK
DIS
Adjustable
Boost
SDA
SCK
DIS
8 Bit Register
4 Bit Register
10 Bit Register
10 Bit Register
8 Bit Register
7 Bit + Sign
3 Bit + Sign
1 Bit
Settings
Settings
IMOD
IBIAS
Equalizer
CP Adjust
Limiter Current
HC Enable
2-Wire Interface and Control Logic
CP Adjust
Power-On
Reset
BIAS
Bias
Current
Generator
and
APC
MONB
MONP
FLT
PD
COMP
Band-Gap
and
Analog
References
RZTC
BIAS
MONB
MONP
FLT
PD
COMP
RZTC
Figure 1. Block Diagram of the ONET1101L
B0285-01
PACKAGE
The ONET1101L is packaged in a small footprint 4mm × 4mm 24-pin, RoHS-compliant QFN package, with a
lead pitch of 0.5 mm. The 24-pin QFN Package top view and pin description follow.
2
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