M02139 Datasheet, PDF (1/18 Pages) M/A-COM Technology Solutions, Inc. – 1G/10G Gbps TIA with AGC and Rate Select

M02139
1G/10G Gbps TIA with AGC and Rate Select
The M02139 is a multi-rate TIA supporting data rates from 1 Gbps to 10.3 Gbps and having a wide input dynamic
range to support different transmission distance requirements. Input overload of 2 mA_PP and input sensitivity of
better than -19 dBm are useful for single-mode, high power long haul links, as well as short haul multi-mode links.
In order to satisfy such high sensitivity and good optical overload requirements, automatic gain control (AGC) is
implemented in the M02139. The AGC monitors the output amplitude and automatically reduces the TIA gain when
the photodiode current exceeds the AGC threshold, maintaining the output at a constant level.
Requiring no extra pins on the ROSA, rate select is controlled by the DC potential on the mon pad. Low rate is
optimized for 1G/1.25 Gbps performance with a typical sensitivity lower than -22 dBm. A replica of the average
photodiode current is available at the MON pad for photo-alignment and SFF-8472 Rx power monitoring.
Applications
• Fibre Channel Transceivers (2x, 4x, 8x, 10x)
• 10GBASE-SR, IR and LR Links
• SONET/SDH OC-192/STM-64
• 10 Gbps ROSA
• SFP/SFP+ Modules
• 10GBASE/1GBase Dual Rate Modules
• XFP, XENPAK, X2 and 300-pin MSA transponder modules
Features
• Typical -19 dBm average sensitivity @ 10.3 Gbps
• Low rate mode for 1G/1.25 Gbps operation
• No filter (PINK) capacitor required
• AGC provides dynamic range of 23 dB
• 3.8 kΩ differential transimpedance
• 2 mA_PP overload input current
• Photodiode current monitor
• Internal or external bias for photodiode
• Single +3.3 V supply
• Available in die form only
Typical Applications Diagram
1 nF
V_CC
02139-DSH-001-D
PINK
Typically
AC-Coupled
to Limiting
Amplifier
DOUT
M02139
PINA
DOUTB
Limiting
Amplifier
Monitor Output /Rate Select
Rm
Mindspeed Technologies^®
Mindspeed Proprietary and Confidential
August 2011