M02040-14
3.3V Limiting Amplifier for Applications to 2.125 Gbps
The M02040-14 is an integrated high-gain limiting amplifier. Featuring PECL outputs, the M02040-14 is useable in
applications to 2.125 Gbps. Full output swing is achieved even at minimum input sensitivity. The M02040-14 oper-
ates with a 3.3V supply.
DC_Servo supports applications requiring instantaneous output response.
The M02040-14 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: M02050-14 3.3V Limiting Amplifier for Applications to 2.5 Gbps (PECL outputs)
M02049-14 3.3V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)
M02043-14 3.3V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)
1.25 Gbps and 4.25 Gbps SFP reference designs available on Mindspeed.com
Applications Features
1.0625 and 2.125 Gbps Fibre Channel Operates with a 3.3V supply
1.25 Gbps Ethernet 2 mV typical input sensitivity at 1.25 Gbps
1.25 Gbps SDH/SONET PECL outputs
Average Receive power monitor output (RSSI )
AVG
Peak-to-peak Receive power monitor output (RSSI )
PP
On-chip DC offset cancellation circuit
Offset cancellation circuit can be disabled for Burst mode applications
Low power (170 mW)
Output Jam function
16-pin 3x3 mm QFN package
Typical Applications Diagram
DC_Servo Control
12.1 k
optional
Jam
I
REF DC_Servo
+3.3 V
V
TT
Biasing
AC-Coupled
to TIA
PECLP
DINP
Clock Data
Limiting
Output
MT I02016 A Recovery
Amplifier
Buffer
Unit
Photodiode DINN
PECLN
MON
Offset cancel
Level
RSSI
PP
Detect
AC or DC Coupled
Comparator
RxAVG
(as described in
IN
Level
Threshold
Applications Information)
Shift
Setting
Circuit
RSSI
AVG LOS
R
EXT
ST V
SET CC
R
ST
02040-DSH-001-H Mindspeed Technologies December 2005
Mindspeed Proprietary and Confidential
Ordering Information
Part Number Package Operating Temperature
M02040-14 * M02040-14 in QFN16 package 40 C to 85 C
M02040-14EVM Evaluation board with M02040-14 40 C to 85 C
* The letter G designator after the part number indicates that the device is RoHS-compliant. Refer to www.mindspeed.com for additional
information.
Revision History
ASIC
Revision Level Date Description
Revision
H Final December 2005 -14 Clarify comments on the use of the DC_Servo pin in the pin definitions and
applications information.
G Final August 2005 -14 Correct Jam connection in block diagram and typical applications figures.
Correct I figure (reference current generation).
REF
F Final June 2005 -14 In the DC specifications, update R DIFF and RSSIavg; added note 1; moved
IN
RSSIavg from ac specifications. In the ac specifications update V , V ,
IN(MIN) LOS
DJ and tr/tf; add specifications for LOS assert and deassert. Updated R
ST
values and the typical LOS curve (Figure 4-3 - Figure 4-5). Added typical
hysteresis curve (Figure 4-6).
E Preliminary March 2005 -14 Update the DC specification V . Update the ac specifications V , v ,
OH IN(MIN) n
T , and T . Corrected the EVM ordering number.
LOS_ON LOS_OFF
D Preliminary December 2004 -14 Update the DC specifications R DIFF and V . Update R values, update
IN IH ST
RSSI information. Remove peaking circuit applications information as this is
not necessary for the -14 revision. Note that the -14 is for 3.3V only.
Typical Eye Diagram Pin Configuration
16 13
GND 1 12 RxAvg
IN
V
GND
CC Center Pad
Connect to GND
PECLN
D N
IN
PECLP 4 9
D P
IN
8
10 mV differential input 5
PP
1.25 Gbps
160 mV/div
140 ps/div
02040-DSH-001-H Mindspeed Technologies ii
Mindspeed Proprietary and Confidential
I
REF RSSI
PP
ST
SET RSSI
AVG
V
CC LOS
DC_Servo JAM