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M02050-15
3.3/5V Limiting Amplifier for Aplications to 2.5 Gbps
Preliminary - Rev V5P
Applications
• 2.5 Gbps STM-16/OC-48 SDH/SONET
• 1.06, 2.12 and 4.24 Gbps Fibre Channel
• 1.25 Gbps Ethernet
• 2.67 Gbps SDH/SONET with FEC
Features
• Operates with a 3.3 or 5V supply
• 4 mV typical input sensitivity at 2.5 Gbps
• PECL outputs
• Rate Selection for 1.25 Gbps operation
• Average Receive power monitor output (RSSIAVG)
• Peak-to-peak Receive power monitor output (RSSIPP)
• On-chip DC offset cancellation circuit
• Low power (< 180 mW at 3.3V)
• Programmable CML Output Amplitude Level
• Output Jam Function
• 16 pin 3x3 QFN package
The M02050-15 is an integrated high-gain limiting amplifier. The M02050-15 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.
Other available solutions: M02049-15 3.3/5V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)
M02040-15 3.3/5V Limiting Amplifier for Applications to 2.125 Gbps (PECL outputs)
M02043-15 3.3/5V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)
1.25 Gbps and 4.25 Gbps SFP reference designs available on MACOM’s website.
Typical Applications Diagram
+3.3 V
Photodiode
RATESELControl RATE SEL
IREF
12.1 kΩ
AC-Coupled
to TIA
DINP
MT02I0A13
VTT
Biasing
Limiting
Amplifier
MON
DINN
Jam
optional
Output
Buffer
PECLP
PECLN
Clock Data
Recovery
Unit
Offset cancel
RxAVGIN
RSSIAVG
REXT
Level
Shift
Level
Detect
Threshold
Setting
Circuit
Comparator
Regulator
STSET
RST
VCC3 VCC
RSSIPP
AC or DC Coupled
(as described in
Applications Information)
LOS
1
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support

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M02050-15
3.3/5V Limiting Amplifier for Aplications to 2.5 Gbps
Preliminary - Rev V5P
Ordering Information
Part Number
Package
M02050-15 *
M02050-15 in QFN16 package
M02050-15EVM
Evaluation board with M02050-15
* The letter “G” designator after the part number indicates that the device is RoHS-compliant.
Operating Temperature
–40 °C to 85 °C
–40 °C to 85 °C
Revision History
Revision
Level
V5P
D (V4P)
Preliminary
Preliminary
Date
May 2015
April 2005
Description
Updated logos and page layout. No content changes.
Separated the M02049 and M02050 data sheets. New document number for the M02049 is 02049-
15-DSH-002-D.
Update the following DC specifications: ICC, RINDIFF and VOH. Update the following ac specifications:
VIN(MIN), vn, VLOS, HYS, DJ, RJ, tr/tf, TLOS_ON, and TLOS_OFF. Update RST and RSSI values for this
revision of the part.
M02050 Typical Eye Diagram
M02050-15 Pin Configuration
16 13
10 mVPP differential input
2.5 Gbps
150 mV/div
80 ps/div
GND
VCC
PECLN
PECLP
1
4
Center Pad
Connect to GND
58
12 RxAvgIN
GND
DINN
9 DINP
2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support

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M02050-15
3.3/5V Limiting Amplifier for Aplications to 2.5 Gbps
Preliminary - Rev V5P
1.0 Product Specification
1.1 Absolute Maximum Ratings
These are the absolute maximum ratings at or beyond which the IC can be expected to fail or be damaged. Reli-
able operation at these extremes for any length of time is not implied.
NOTE:
The package bottom must be adequately grounded to ensure correct
thermal and electrical performance, and it is recommended that vias
are inserted through to a lower ground plane.
Table 1-1. Absolute Maximum Ratings
Symbol
Parameter
VCC
TSTG
PECLP, PECLN
I(PECLP), I(PECLN)
|DINP - DINN|
DINP, DINN
STSET
JAM
LOS
Rate_Sel
IREF
I(RSSIAVG)
RSSIPP
I(LOS)
Power supply voltage (VCC-GND)
Storage temperature
PECL Output pins voltage
PECL Output pins maximum continuous current (delivered to load)
Data input pins differential voltage
Data input pins voltage meeting |DINP - DINN| requirement
Signal detect threshold setting pin voltage
Output enable pin voltage
Status Output pins voltage
Rate Select input pin voltage
Current into Reference input
Current into RSSIavg input
RSSIPP pin voltage
Current into Loss of Signal pin
Rating
-0.5 to +5.75V
-65 to +150
VCC - 2 to VCC + 0.4
30
0.80
GND to VCC3 + 0.4
GND to VCC + 0.4
GND to VCC + 0.4
GND to VCC + 0.4
GND to VCC + 0.4
+0 to -120
+0 to -3
GND to +3.6
+1500 to -100
Units
V
°C
V
mA
V
V
V
V
V
V
µA
mA
V
µA
3
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support

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M02050-15
3.3/5V Limiting Amplifier for Aplications to 2.5 Gbps
Preliminary - Rev V5P
1.2 Recommended Operating Conditions
Table 1-2. Recommended Operating Conditions
Parameter
Power supply: (VCC-GND) (apply no potential to VCC3) or
(VCC3-GND) (connect VCC to same potential as VCC3)
Junction temperature
Operating ambient
Rating
+5V ± 7.5% or +3.3V
± 7.5%
-40 to +110
-40 to +85
Units
V
°C
°C
1.3 DC Characteristics
VCC = +3.3V ± 7.5% or +5V ± 7.5%, TA = -40°C to +85°C, unless otherwise noted.
Typical specifications are for VCC = 3.3V, TA = 25°C, unless otherwise noted.
Table 1-3. DC Characteristics
Symbol
Parameter
Conditions
Min
ICC Supply Current
Includes PECL load
VOUTLpecl PECL Output Low Voltage Single ended; 50 Ω load to VCC-2V
(PECLP, PECLN)
VCC-1.81
VOUTHpecl PECL Output High Voltage Single ended; 50Ω load to VCC-2V
(PECLP, PECLN)
VCC-1.025
RINDIFF Differential Input Resistance
Measured between DINP and DINN
90
VOH LOS Output High Voltage
External 4.7-10 kΩ pull up to VCC
2.75
VOL LOS Output Low Voltage
External 4.7-10 kΩ pull up to VCC
0
VIH Logic Input High Voltage
JAM, RATESEL
2.7
VIL Logic Input Low Voltage
JAM, RATESEL
Notes:
1. RATESEL high (high bandwidth operation). Typical supply current decreases by 1.5 mA in low rate mode.
Typ
54 (1)
VCC-1.71
VCC-0.952
115
VCC
Max
TBD
VCC-1.62
VCC-0.88
135
0.4
VCC
0.8
Units
mA
V
V
Ω
V
V
V
V
4
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
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M02050-15
3.3/5V Limiting Amplifier for Aplications to 2.5 Gbps
Preliminary - Rev V5P
1.4 AC Characteristics
VCC = +3.3V ± 7.5% or +5V ± 7.5%, TA = -40°C to +85°C, input bit rate = 2.5 Gbps 223-1 PRBS high rate
mode (RATESEL = High) unless otherwise noted.
Typical specifications are for VCC = 3.3V, TA = 25°C, unless otherwise noted.
Table 1-4. AC Characteristics
Symbol
Parameter
Conditions
VIN(MIN)) Differential Input Sensitivity
VI(MAX) Input Overload
1.25 Gbps, BER < 10-12, low rate mode
(RATESEL = low)
2.5 Gbps, BER < 10-12
BER < 10-12, differential input 2.5 Gbps
BER < 10-12, single-ended input, 2.5 Gbps
vn RMS Input Referred Noise
RATESEL = high
VLOS Loss of Signal Programmable Range Differential inputs
HYS Signal Detect Hysteresis
electrical; across LOS programmable range
RSSIpp
Peak-to-peak received signal strength Differential input signal range
indicator range
RSSIavg
BWLF
Average received signal strength ± 15% accuracy
indicator range
± 20% accuracy
Small-Signal –3dB Low Frequency Excluding AC coupling capacitors
Cutoff
DJ Deterministic Jitter (includes DCD) K28.5 pattern at 2.5 Gbps, 10 mVPP input
RJ Random Jitter
10 mVPP input
tr / tf Data Output Rise and Fall Times
20% to 80%; outputs terminated into 50 Ω;
10 mVPP input
RATESEL = High
RATESEL = Low
TRATESEL Rate select assert / deassert time
Time from when rate select is asserted high or low until
amplifier is performing at selected bandwidth
TLOS_ON
Time from LOS state until LOS output LOS assert time after 1 VPP input signal is turned off;
is asserted
signal detect level set to 10 mV
TLOS_OFF
Time from non-LOS state until LOS is LOS deassert time after input crosses signal detect
deasserted
level; signal detect set to 10 mV with applied input
signal of 20 mVPP
Min
1200
600
5
2
4
5
0.5
2.3
2.3
Typ Max Units
2 – mV
4 7 mV
– – mV
– – mV
280 – μVRMS
– 75 mV
3.5 5.5
dB
– 100 mV
– 500 μA
– 2 mA
25 – kHz
– 25 ps
4.7 – psRMS
ps
90 110
150 200
– 10
μs
– 80 μs
– 80 μs
5
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support