M02050_17 Datasheet, PDF (10/28 Pages) M/A-COM Technology Solutions, Inc. – 3.3/5V Limiting Amplifier for Applications to 2.5 Gbps

3.0 Functional Description
3.1
Overview
The M02050-15 is an integrated high-gain limiting amplifier. The M2050 features PECL outputs and is intended for
use in applications to 2.5 Gbps. Full output swing is achieved even at minimum input sensitivity. The M02050-15
can operate with a 3.3V or 5V supply.
Rate select is supported for SFP applications and/or to achieve optimum sensitivity at data rates ≤ 1.25 Gbps.
When rate select is high, optimum sensitivity is achieved at 2.5 Gbps.
The M02050-15 also includes two analog RSSI outputs proportional to either the average or peak to peak input sig-
nal and a programmable signal-level detector allowing the user to set thresholds at which the logic outputs are
enabled.
Figure 3-1. Block Diagram Example
RATE_SEL
I_REF
V_TT
Biasing
DINP
DINN
Limiting
Amplifier
Jam
Output
Buffer
RxAVG_IN
RSSI_AVG
Level
Shift
Offset cancel
Level
Detect
Comparator
Threshold
Setting
Circuit
Regulator
ST_SET
V_CC3 V_CC
PECLP
PECLN
RSSI_PP
LOS
02050-DSH-002-F
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