2609B Datasheet

2609B Broadband Photodiode Module


Features, Applications


The is a packaged impedance-matched photodiode module with internal gain designed for use in optical broadband receivers in fiber-optic networks. The patented impedance-match technology results in improved gain-bandwidth product compared to external circuits due to better control of parasitics between the photodiode and the impedance-matching circuit.

Table 1. Pin Descriptions Pin No. Description Ground Open RF Out Ground Bias Ground Open Ground

Flat response �0.5 dB Frequency response to 860 MHz High responsivity: -->0.85 A/W nm --0.95 A/W 1550 nm Internal current gain, 6 dB (typ.) 75 impedance-matched


Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Operating Case Temperature Range Storage Temperature Range Optical Input Power Bias Voltage Forward Current Symbol TC Tstg PIN VPD IF Min �40 Max Unit V mA

Note: These product specifications describe warranted performance. Typical values provide expected levels of performance, but are not guaranteed. Table 2. Electrical/Optical Characteristics Parameter Optical Wavelength Range Responsivity Optical Return Loss1 Bias Voltage Dark Current

Table 3. RF Characteristics Parameter Frequency Range Gain
Frequency Response Receiver Noise Distortion Products Second Order Third Order

1. Current gain of internal transformer circuit. 2. Two laser test. Each laser has 40% modulation index. Total received optical power is 0 dBm. Distortion products measured at 80 MHz, 450 MHz, 600 MHz, and 850 MHz.

Figure 2. Typical Frequency Response Measured into a 75 Load, VSWR <1.5



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