FOA2322A Datasheet, PDF (29/37 Pages) Infineon Technologies AG – 3.2 Gbi t /s Laser Driver IC for Telecom and Datacom Applications

FOA2322A
Pin Description
Table 6
Pin Definitions and Functions (cont’d)
Signal Name Function
Explanation
RBRIP
Control
The pilot current amplitude on bias current
(mode 2) can be decreased by connecting a
resistor between RBRIP and V_CC. For default
values do connect to V_CC. It has no influence if
using mode 1. Let open if mode 1 is used.
RMRIP
Control
The pilot current amplitude on modulation current
high level (mode 2) can be decreased by
connecting a resistor between RMRIP and V_CC.
For default values do connect to V_CC. It has no
influence if using mode 1. Let open if mode 1 is
used.
START
–
Do not connect.
MX
–
Do not connect.
V_CCA
V_CCD
V_CCD2
Power Supply
Power Supply
Power Supply
Positive power supply for analog circuit part.
Positive power supply for digital circuit part.
Positive power supply for digital circuit part with an
additional serial diode to increase the modulation
output voltage range of about 0.85 V for V_CC range
of 5 V ± 0.5 V. Let open if it is not used.
V_EE1
Power Supply
Negative power supply, only connected to the
output current mirror stage of bias generator,
normally GND.
V_EE2
Power Supply
Negative power supply, only connected to the
output stage, normally GND.
V_EE
Power Supply
Negative power supply of the rest of circuit,
normally GND.
Preliminary Data Sheet
25
2001-05