M02044CG-31 Datasheet, PDF (10/22 Pages) M/A-COM Technology Solutions, Inc. – 3.3/5V Limiting Amplifier for Applications from 100 Mbps to 622 Mbps

Functional Description
3.2
Features
• Pin compatible with the MC2044C
• Operates with a 3.3V or 5V supply
• 2.8 mV typical input sensitivity at 622 Mbps
• Programmable input-signal level detect
• On-chip DC offset cancellation circuit
• CMOS Signal Detect and LOS outputs
• Output Jam Function
• Low power (< 200 mW including PECL outputs)
3.3
General Description
The M02044 is a high-gain limiting amplifier for applications up to 622 Mbps, and incorporates a limiting amplifier,
an input signal level detection circuit and also a fully integrated DC-offset cancellation loop that does not require
any external components. The M02044 features PECL high-speed data outputs.
The M02044 provides the user with the flexibility to set the signal detect threshold and features CMOS status and
LOS outputs. Optional output buffer disable (squelch/jam) can be implemented using the JAM input.
3.3.1
Inputs
The data inputs are internally connected to V_TT via 50Ω resistors, and generally need to be AC coupled. Referring
to Figure 3-2, the nominal V_TT voltage is 2.85V because of the internal resistor divider to V_CC3, which means this is
the DC potential on the data inputs. See the applications information section for further details on choosing the AC-
coupling capacitor.
Figure 3-2. CML Data Inputs
V_CC
V_TT
V_CC3
V_CC
1.3 kΩ
DINP
50 Ω
50 Ω
8.3 kΩ
DINN
02044-DSH-002-A
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