tat6254c fiber to the home rf amplifier 47?1000 mhz applications ? high dynamic range ftth ? gpon ftth ? multi dwelling unit tia ? mini-node product features functional block diagram ? single 12 v or 5 v configuration ? low noise 3.9 pa/rthz eq uivalent input noise ? 19 or 23 dbmv/channel rf output, at 55.25mhz ? 33 db agc range, for -10 to +2 dbm optical inputs ? low power consumption, 1.3 watts at 12 v and 1.0 watt at 5 v ? potentially eliminates the need for costly balun and directional coupler ? linearity better than ?63 dbc cso and ctb general description pin configuration the triquint tat6254c fttp sfu video receiver p rovides a low noise analog interface to catv receivers and optical triplexers. the tat6254c is intended for use in single family unit (sfu) analog video fiber to the premise (fttp) applications. the tat6254c exhibits low input noise and distortion that provides performance margin critical to meeting stringent fttp link requirements. it runs on either a single 12 v or 5 v supply, eliminating the need for an extra onu power supply. the tat6254c provides automatic gain control (agc) to maintain a constant +19 dbmv/ch output (+23 dbmv in high output mode) to ensure consistent video quality and ease of design. the tat6254c is fabricated using 6-inch gaas phemt technology to optimize performance and cost. the tat6254c has the flexibility to be designed for a range of rf outputs and supply voltages. this datasheet discusses four configurations; standard rf output and high rf output with both 5v and 12v supplies. pin # symbol 1 tia in a 2,4 bias 1 3,13 nc 5 tia in b 6 bias adj b 7 tia out b 8, 18 bias 2 9 pa in b 10 trim b 11, 12 pa out b 14, 15 pa out a 16 trim a 17 pa in a 19 tia out a 20 bias adj a epad gnd ordering information part no. description tat6254c catv ftth phemt amplifier TAT6254C-EB evaluation board standard t/r size = 2500 pieces on a 13? reel. data sheet: rev a 09/14/2011 - 1 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ?
tat6254c fiber to the home rf amplifier 47?1000 mhz data sheet: rev a 09/14/2011 - 2 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ? specifications absolute maximum ratings parameter rating storage temperature -60 to +150 o c operating temperature -40 to +85 o c device voltage,v dd +15 v thermal resistance (jnc. to case) ? jc 17 o c/w operation of this device outsi de the parameter ranges given above may cause permanent damage. recommended operating conditions parameter min typ max units v dd 12 v t j (for >10 6 hours mttf) 150 o c electrical specifi cations are measured at sp ecified test conditions. specifications are not guaranteed over all recommended operating conditions. electrical specifications (per applications circuit herein) parameter conditions min typical max units operational frequency range 47 1000 mhz rf gain at 553.25 mhz see note 1. 33 db gain flatness 1.0 db tilt see note 2. 3 db equivalent input noise 3.9 pa/rthz rf output level @ 55.25 mhz, standard output see note 3. 18 19 dbmv/ch rf output level @55.25 mhz, high output see notes 3 & 5. 22 23 dbmv/ch output return loss 16 db cso see note 4. -63 dbc ctb see note 4. -63 dbc gain control range see note 6. 33 db power supply current @ 12 v 120 ma power supply current @ 5 v 200 ma 1) gain = 20*log (z/75) 2) from 54 mhz to 870 mhz; higher tilt possible 3) agc using 3.3 %/ch output level fixed by external agc 4) 80 channels analog ntsc 5) uses output transformer 6) with suggested application circuit optical input and triplexer requirements parameter conditions min typical max units optical input power -10 2 dbm optical modulation index 3.3 %/ch triplexer 1550 nm pin responsivity 0.9 ma/mw triplexer 1550 nm pin capacitance 0.9 pf
tat6254c fiber to the home rf amplifier 47?1000 mhz 12 v standard output application board typical performance v dd = +12 v, i dd = 120 ma , temperatures are ambient 0 5 10 15 20 25 30 35 40 0 200 400 600 800 1000 s21 (db) frequency (mhz) gain over agc setting, +25 c -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 0 200 400 600 800 1000 departure from least squares fit (db) frequency (mhz) gain flatness, +25 c 0 5 10 15 20 25 30 35 40 0 200 400 600 800 1000 s21 (db) frequency (mhz) gain over agc setting, -40 c -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 0 200 400 600 800 1000 departure from least squares fit (db) frequency (mhz) gain flatness, -40 c 0 5 10 15 20 25 30 35 40 0 200 400 600 800 1000 s21 (db) frequency (mhz) gain over agc setting, +85 c -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 0 200 400 600 800 1000 departure from least squares fit (db) frequency (mhz) gain flatness, +85 c data sheet: rev a 09/14/2011 - 3 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ?
tat6254c fiber to the home rf amplifier 47?1000 mhz 12 v standard output application bo ard typical performance (cont'd) v dd = +12 v, i dd = 120 ma , 25 o c unless otherwise stated,temperatures are ambient 0 1 2 3 4 5 6 0 200 400 600 800 1000 1200 noise (pa/rthz) 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 ctb (dbc) 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 usin g 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 co stly 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 m odify 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 prov ides 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. con necting the digital world to the global network ?
tat6254c fiber to the home rf amplifier 47?1000 mhz data sheet: rev a 09/14/2011 - 5 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ? gain control is accommodated with a low co st external pin diode circuit placed between the input trans-impedance amplifier and the output amplifier. this helps reduce the die size of the tat6254c and provides for excellent pin diode distortion characteristics over a continuous control range. up to 33 db of gain control is possible using the recommended 12 v standard output application circuit. the application circuits are optimized for 870 mhz performance w ith slight rolloff for use in combination with a post filter fo r applications such as moca. for optimi zed performance at 1 ghz and beyond, it is recommended that a low capacitance photodiode be used with a change in value of the peaking inductors l1 and l2. for further guidance, please contact triquint semiconductor application engineering. for high output operation, refer to the appropriate 5 v high output application circuit. this option uses a 4:1 transformer to combine the outputs of the second stage. for further information email sjcapplication.engineering@tqs.com . pin description pin symbol description 1 tia in a input to tran s-impedance amplifier a 2,4 bias 1 bias port 3,13 nc no connect 5 tia in b input to tran s-impedance amplifier b 6 bias adj b bias adjustment for trans-impedance amplifier b 7 tia out b output of trans-impedance amplifier b 8, 18 bias 2 bias port 9 pa in b input to post-amplifier b 11, 12 pa out b output of post amplifier b 14, 15 pa out a output of post amplifer a 17 pa in a input to post amplifier a 19 tia out a output of trans-impedance amplifer a 20 bias adj a bias adjustment for trans-impedance amplifier a epad gnd ground
tat6254c fiber to the home rf amplifier 47?1000 mhz 12 v high output schematic data sheet: rev a 09/14/2011 - 6 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ?
tat6254c fiber to the home rf amplifier 47?1000 mhz 5 v high output schematic data sheet: rev a 09/14/2011 - 7 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ?
tat6254c fiber to the home rf amplifier 47?1000 mhz mechanical information package information and dimensions this package is lead-free/rohs-compliant. it is compatible with both lead-free (maximum 260 c reflow temperature) and lead (maximum 245 c reflow temperature) soldering processes. pin #1 identification detail mounting configuration all dimensions are in millimeter s. angles are in degrees. data sheet: rev a 09/14/2011 - 8 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ?
tat6254c fiber to the home rf amplifier 47?1000 mhz product compliance information esd information esd rating: class 1a value: passes ? 250 v min. test: human body model (hbm) standard: jedec standard jesd22-a114 esd rating: class iv value: passes ? 1000 v min. test: charged device model (cdm) standard: msl rating the part is rated mois ture sensitivity level 3 at 260c per jedec standard ipc/jedec j-std-020. solderability compatible with the latest version of j-std-020, lead free solder, 260 this part is compliant with eu 2002/95/ec rohs directive (restrictions on the use of certain hazardous substances in electrical and electronic equipment). this product also has the following attributes: ? lead free contact information for the latest specifications, additional product information, worldwide sales and distribution locations, and information abou t triquint: web: www.triquint.com tel: +1.707.526.4498 email: info-sales@tqs.com fax: +1.707.526.1485 for technical questions and application information: email: sjcapplication.engineering@tqs.com important notice the information contained herein is believed to be reliable. triquint makes no warranties regarding the information contained herein. triquint assumes no responsibility or liability whatso ever for any of the information contained herein. triquint assumes no responsibility or liability whatsoever for the use of the information contained herein. the information contained herein is provided "as is, where is" and with all faults, and th e entire risk associated with such information is entirely with the user. all information contained herein is subject to change without notice. customers should obtain and verify the latest relevant information before placing orders for triquint products. the information contained herein or any use of such information does not grant, explicitly or implicitly, to any part y any patent rights, licenses, or any other intellectual prope rty rights, whether with regard to such information itself or anything described by such information. triquint products are not warranted or authorized for use as critical components in medical, life-saving, or life-sustaining applications, or other applications where a failure would reason ably be expected to cause severe personal injury or death. data sheet: rev a 09/14/2011 - 9 of 9 - disclaimer: subject to change without notice ? 2011 triquint semiconductor, inc. con necting the digital world to the global network ?
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