F0100612B Datasheet, PDF (6/7 Pages) Eudyna Devices Inc – 10Gb/s Receiver Transimpedance Amplifier

F0100612B
General Description
10Gb/s Transimpedance Amplifier
A transimpedance amplifier is applied as a pre-amplifier which is an amplifier for a faint
photo-current from a PIN photo diode (PD). The performance in terms of sensitivity,
bandwidth, and so on, obtained by this transimpedance amplifier strongly depend on the
capacitance brought at the input terminal; therefore, “typical”, “minimum”, or “maximum”
parameter descriptions can not always be achieved according to the employed PD and
package, the assembling design, and other technical experts. This is the major reason that
there is no product lineup of packaged transimpedance amplifiers.
Thus, for optimum performance of the transimpedance amplifier, it is essential for
customers to design the input capacitance carefully.
Hardness to electro-magnetic interference and fluctuation of a power supply voltage is also
an important point of the design, because very faint photo-current flows into the
transimpedance amplifier. Therefore, in the assembly design of the interconnection between
a PD and a transimpedance, noise should be taken into consideration.
Recommendation
Noise Performance
The F0100612B based on GaAs FET’s shows excellent low-noise characteristics
compared with IC’s based on the silicon bipolar process. Many transmission systems often
demand superior signal-to-noise ratio, that is, high sensitivity; F0100612B is the best choice
for such applications.
The differential circuit configuration in the output enable a complete differential operation to
reduce common mode noise: simple single ended output operation is also available.