02020-DSH-001-F Datasheet, PDF (1/15 Pages) M/A-COM Technology Solutions, Inc. – 4 Gbps CMOS TIA with AGC

M02020
4 Gbps CMOS TIA with AGC
The M02020 is a 4 Gbps TIA achieving a wide input dynamic range to support different transmission distance
requirements. Input overload of 2 mA_PP is provided to support short-haul fiber optic systems and input sensitivity of
approximately -23 dBm is useful for single-mode tests of high power long haul links.
In order to satisfy such high sensitivity and good optical overload requirements, automatic gain control (AGC) is
implemented in the M02020. 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.
A replica of the average photodiode current is available at the MON pad for photo-alignment and Receive Power
monitoring (SFF-8472 compliant).
Applications
• Fibre Channel Transceivers (1x, 2x and 4x)
• 4.25 Gbps ROSA
• SFF/SFP Modules
• ATM/SONET
• 4 km and 10 km single-mode links
Features
• Typical -22.8 dBm Sensitivity
• Data rates to 4.25 Gbps
• No filter (PINK) capacitor required
• AGC provides dynamic range of 27 dB
• 3.6 kΩ differential transimpedance
• 4 mA_PP overload input current
• Photodiode current monitor
• Internal or external bias for photodiode
• Single +3.3V supply
• Same pad layout and die size as M02011/13/14/15/16/24/26
02020-DSH-001-F
Typical Applications Diagram
V_CC
1 nF
V_CC
PINK
DOUT
AC-Coupled
to Limiting
Amplifier
M02020
Limiting
Amplifier
PINA
GND
DOUTB
MON
TIA Bond Pad
TO Can Lead
Rm
Mindspeed Technologies^®
Mindspeed Proprietary and Confidential
October 2007