M02024-BRF-001-A_15 [TE]
2.5 Gbps High Sensitivity Transimpedance Amplifier with AGC;
| 型号： | M02024-BRF-001-A_15 |
| 厂家： | 
TE CONNECTIVITY |
| 描述： | 2.5 Gbps High Sensitivity Transimpedance Amplifier with AGC |
| 文件： | 总2页 (文件大小：83K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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2.5 Gbps High Sensitivity Transimpedance Amplifier with AGC
M02024
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Key Features
Low-power, high-sensitivity 2.5 Gbps TIA for
GPON and OC48 applications
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-29 dBm Sensitivity
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Photodiode current monitor
Data rates to 2.5 Gbps
Internal or external bias for
photodiode
The M02024 transimpedance amplifier (TIA) with
automatic gain control (AGC) is fabricated in
sub-micron CMOS for high performance. The
device targets a sensitivity of -29dBm, enabling
the use of low cost PIN diodes to meet the GPON
Class B+ standard.
Integrated filter, eliminates
need for a capacitor on the
photodiode cathode
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Single +3.3V supply
Same pad layout and die
size as
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AGC provides dynamic
range of 35 dB
M02011/13/14/15/16
+6 dBm Input overload
In order to satisfy such high sensitivity and good
optical overload requirements, automatic gain
control (AGC) is implemented in the M02024. The
AGC monitors the output amplitude and auto-
matically reduces the TIA gain when the
Higher frequency noise is removed by the inte-
grated filter, eliminating the need for an external
capacitor on the photodiode cathode.
photodiode current exceeds the AGC threshold,
maintaining the output at a constant level. With
an input overload capability greater than +6 dBm,
the AGC allows more than 35 dB of dynamic
range, providing a low-cost solution for longer-
reach 2.5 Gbps GPON/ATM/SONET systems that
formerly required an APD. For even greater sen-
sitivity, the M02024 may be used with an APD.
The circuit is intended to be configured for use
with PIN photodiodes in the “grounded cathode”
configuration with the anode connected to the
input of the TIA and the cathode connected to
the PINK terminal. The PINK terminal provides
~2V reverse DC bias to reduce the photodiode
capacitance. Operation with an external photodi-
ode bias supply is also possible, as required by
avalanche photodiodes.
The TIA consists of a high gain single-ended
CMOS amplifier with a feedback resistor. The
feedback creates a virtual low impedance at the
input, and nearly all of the input current passes
through the feedback resistor, defining the volt-
age at the output. Advanced CMOS design
techniques are employed to maintain the stability
of this stage across all input conditions. An on-
chiplow dropout linear regulator has been
incorporated into the design to give excellent
noise rejection up to several MHz.
A replica of the average photodiode current is
available at the MON pad for photo-alignment,
monitoring average power and 'Loss of Signal'
detection.
For optimum system performance, the M02024
die should be mounted with the photodetector
inside a lensed TO-Can or other optical sub-
assembly.
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M02024 Functional Block Diagram
Key Features
Applications
• -29dBm sensitivity, >+6 dBm saturation at 2.5 Gbps
• Bandwidth 1.65 Ghz (Typical)
• GPON Class B+ application with a low cost PIN diode
• SONET OC-48
• Overload of +6 dBm
• PCI Express
• Typical differential transimpedance: 48KΩ
• Differential 100Ω output impedance
• Operates on a single 3.3V supply
• Monitor output
• Infiniband
• GEPON/ GPON, multi-rate applications
Ordering Information
• M02024-11: waffle pack
• M02024-12: wafer
• AGC provides dynamic range of more than 35 dB
www.mindspeed.com/salesoffices
General Information: (949) 579-3000
Headquarters – Newport Beach
4000 MacArthur Blvd., East Tower
Newport Beach, CA 92660-3007
M02024-BRF-001-A
© 2006 Mindspeed Technologies,Inc. All rights reserved. Mindspeed and the Mindspeed
logo are trademarks of Mindspeed Technologies. All other trademarks are the prop-
erty of their respective owners. Although Mindspeed Technologies strives for accu-
racy in all its publications, this material may contain errors or omissions and is subject
to change without notice. This material is provided as is and without any express or
implied warranties, including merchantability, fitness for a particular purpose and
non-infringement. Mindspeed Technologies shall not be liable for any special, indirect,
incidental or consequential damages as a result of its use.
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