M02006 Datasheet, PDF (9/16 Pages) M/A-COM Technology Solutions, Inc. – CMOS Pre-amplifier with AGC for Long-reach 155 Mbps Fiber-optics Based Transmitter

M02006
CMOS Pre-amplifier with AGC for Long-reach
155 Mbps Fiber-optics Based Transmitter
Rev V4
4.0 Applications
4.1
Filter Design
The achievable sensitivity of the M02006 is dependant on the noise bandwidth of the amplifier, which varies with
temperature and process. The bandwidth should therefore be limited by an interstage filter. This will typically
employ a one pole filter, using a capacitor across the outputs. For maximum sensitivity, a filter with steeper roll-off
and better transient response can be implemented with inductors and capacitors. If the module is intended to be
used at several rates, interstage filtering should not be employed. A typical application circuit is shown in
Figure 4-1.
Figure 4-1. Typical Applications Circuit
+5 V
*470 pF
V_CC
PIN
K
PIN
A
V_CC
10 nF
D _{OU T}
Gnd
D _{OU T}
Gnd
MC2045
Post Amplifier
10 nF
D _IN
C_FILT
D _IN
10 nF
* The 470pF capacitor should be mounted inside the TOcan/optical sub assembly with the photodiode
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