TAT6254C データシートの表示（PDF） - TriQuint Semiconductor
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TAT6254C Datasheet PDF : 9 Pages
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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
Equivalent Input Noise at Max Gain
6
5
4
3
85 C
2
25 C
1
-20 C
0
0
200
400
600
800 1000 1200
Frequency (MHz)
-60
-65
-70
-75
-80
-85
0
CTB
+2 dBm at 55.25MHz, 4.3% (40ch) and 3.3% (80ch) equiv inputs
18 dBmV/Ch, 80 ch
20 dBmV/Ch, 80 ch
22 dBmV/Ch, 80 ch
22 dBmV/Ch, 40 ch
20 dBmV/Ch, 40 ch
18 dBmV/Ch, 40 ch
100
200
300
400
500
600
Frequency (MHz)
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
Bulk
Optic
technologies and lower gain pHEMT technologies.
CWDM
Reference
AGC
Temp Comp
RF Detector
Gain Adjust
Content
Filter
TIA
Gain
Tilt
TIA
RF Output
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 Bulk
Optic
architectures.
CWDM
Biasing
RF AGC Solution
Reference
AGC
Temp Comp
RF Detector
Gain Adjust
TIA
Match
TIA
Gain
4:1
Xfmr
Tilt
(Optional)
RF Output
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
RF AGC High Output Option
Data Sheet: Rev A 09/14/2011
© 2011 TriQuint Semiconductor, Inc.
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Disclaimer: Subject to change without notice
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