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TAT6254C-EB Datasheet(PDF) 4 Page - TriQuint Semiconductor |
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TAT6254C-EB Datasheet(HTML) 4 Page - TriQuint Semiconductor |
4 / 9 page TAT6254C Fiber To The Home RF Amplifier 47–1000 MHz 12 V Standard Output Application Board Typical Performance (cont'd) VDD = +12 V, IDD = 120 mA , 25 oC unless otherwise stated,Temperatures are ambient 0 1 2 3 4 5 6 0 200 400 600 800 1000 1200 Frequency (MHz) Equivalent Input Noise at Max Gain -20 C 25 C 85 C -85 -80 -75 -70 -65 -60 0 100 200 300 400 500 600 Frequency (MHz) CTB 18 dBmV/Ch, 80 ch 20 dBmV/Ch, 80 ch 22 dBmV/Ch, 80 ch 18 dBmV/Ch, 40 ch +2 dBm at 55.25MHz, 4.3% (40ch) and 3.3% (80ch) equiv inputs 20 dBmV/Ch, 40 ch 22 dBmV/Ch, 40 ch For performance data using 5 V Output, please email sjcapplication.engineering@tqs.com. Detailed Device Description And Application Overview The TAT6254C integrates two low noise high gain trans-impedance amplifiers in a differential configuration followed by an output amplifier. It provides a low input impedance to minimize the effects of photodiode capacitances and stray impedance affects on gain flatness. The TAT6254C is fabricated using high gain Gallium Arsenide pHEMT technology developed for high-volume commercial markets. It provides improved gain and noise compared to older MESFET technologies and lower gain pHEMT technologies. The TAT6254C was designed as a general purpose FTTP receiver. While it eliminates the need for costly hand-wound parts such as baluns and directional couplers, it allows users wide flexibility in setting gain, tilt, and bias levels to best meet the requirements posed by different operators and architectures. The TAT6254C provides the flexibility to address high levels of gain required by GPON architectures. Designers can easily modify external circuit values to enable wider optical input ranges, such as needed in newer GPON architectures. The TAT6254C provides two high level outputs. One output drives an optical tilt network while the other drives a content filter and an RF detection circuit. The TAT6254C does not require an output balun. Because the two equal outputs have a high level of isolation; the TAT6254C effectively provides an integrated directional coupler with extra gain to drive the RF detection circuit at a high level. This eases offset voltage requirements on operational amplifiers used in the AGC block. Biasing Bulk Optic CWDM Reference Content Filter Temp Comp RF Detector Tilt AGC RF Output Gain Gain Adjust TIA TIA Biasing Bulk Optic CWDM Reference Content Filter Temp Comp RF Detector Tilt AGC RF Output Gain Gain Adjust TIA TIA RF AGC Solution Biasing Bulk Optic CWDM Reference Temp Comp RF Detector AGC Gain Gain Adjust Match TIA TIA RF Output Tilt (Optional) 4:1 Xfmr RF AGC High Output Option Data Sheet: Rev A 09/14/2011 - 4 of 9 - Disclaimer: Subject to change without notice © 2011 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network ® |
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