View SY88063AL_4369416.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SY88063AL 3.3v, 12.5gbps limiting post amplifier with automatic digital offset correction micrel inc. ? 2180 fort www.micrel.com une drive ? san jose, ca 95131 ? usa ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http:// general description the SY88063AL is a multi-rate limiting post amplifier designed for fiber-optic transceivers applications up to 12.5gbps. it features an automatic digital offset correction function. the offset correcti on feature will automatically counteract any inherent offset present in the input signal and amplifier. the highly sensitive SY88063AL can amplify input signals as low as 20mvpp at 12.5gbps or 10mvpp at 10.3gbps to differential cml output levels. the SY88063AL generates a loss-of-signal (los) open- collector ttl output. a programmable loss-of-signal level set pin (loslvl) sets the sens itivity of the input amplitude detection. los asserts high if the input amplitude falls below the threshold set by loslvl and de-asserts low otherwise. the enable input (/en) de-asserts the true output signal without removing the input signal. the los output can be fed back to the /en input to implement the squelch function that maintains output stability under a loss-of-signal condition. the SY88063AL operates from a single +3.3v power supply, over ?40 o c to +85 o c, and is available in 3mm x 3mm 16-pin qfn package. all support documentation can be found on micrel?s web site at: www.micrel.com . features ? up to 12.5gbps operation ? automatic digital offset correction ? programmable los level (loslvl) ? squelching function to maintain output stability ? low-noise cml data outputs ? ttl /en input ? ?40 o c to +85 o c operation ? small 3mm x 3mm qfn package applications ? 1x/2x/4x/8x fibre channel ? sr/lr sfp+ optical transceiver ? 10gpon onu ? sonet/sdh:oc192 ? stm64 markets ? datacom/telecom ? optical transceiver ________________________________________________________________________________________________ typical application september 2011 m9999-090911-b hbwhelp@micrel.com or (408) 955-1690
micrel, inc. SY88063AL september 2011 2 m9999-090911-b hbwhelp@micrel.com ordering information part number package type operating range package marking SY88063ALmg lead-free qfn-16 industrial 063a with pb-free bar line indicator SY88063ALmg tr (1) lead-free qfn-16 industrial 063a with pb-free bar line indicator note: 1. tape and reel. pin configuration 3mm x 3mm qfn-16 pin description pin number pin name type pin function 2, 3 din, /din data input differential data inputs. each input is internally terminated to approximately vcc ? 1.3v by a 50 ? resistor. ac-couple input signals. 5, 6, 14, 16 nc no connection unused pins. leave open. 7 los open-collector ttl output loss-of-signal: asserts high when the data input amplitude falls below the thresh old set by loslvl. 8 loslvl dc input loss-of-signal level set. a resistor from this pin to v cc sets the threshold for the data inpu t amplitude at which los will be asserted. 10, 11 /dout, dout cml output differential data outputs. unused output should be terminated 50 ? -to-v cc . or (408) 955-1690
micrel, inc. SY88063AL september 2011 3 m9999-090911-b hbwhelp@micrel.com or (408) 955-1690 pin description (continued) pin number pin name type pin function 13 locked lvttl output once digital offset correction is locked based input signal, this pin will output a lvttl high. 15 /en lvttl input /enable: this input enables the outputs when it is low. note that this input is internally connected to a 25k ? pull-up resistor and will default to a logic high state if left open. 1, 4 gnd ground device ground. exposed pad must be soldered (or equivalent) to the same potential as the ground pins. 9, 12 v cc power supply positive power supply. bypass with 0.1 f | | 0.01 f low esr capacitors. 0.01 f capacitors should be as close as possible to v cc pins.
micrel, inc. SY88063AL september 2011 4 m9999-090911-b hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) supply voltage (v cc ) ....................................... 0v to +4.0v input voltage (din , /din) .......................................0 to v cc output current (i out ) ............................................... 25ma en voltage .............................................................0 to v cc los lvl voltage.......................................... v cc -1.3v to v cc lead temperature (solde ring, 20sec .) ..................... 260c storage temperature (t s ) ....................... ?65c to +150c operating ratings (2) supply voltage (v cc )............................ +3.0v to +3.6v ambient temperature (t a ).................. ?40c to +85c package thermal resistance (3) qfn ( ja ) still-air ...............................................60c/w ( jb ) ...........................................................33c/w dc electrical characteristics v cc = 3.0 to 3.6v; t a = ?40c to +85c, typical values at v cc = 3.3v, t a = 25c. symbol parameter condition min. typ. max. units i cc power supply current with 50 output load 53 72 ma los lvl los lvl voltage v cc ? 1.3 v cc v v oh dout, /dout high voltage v cc ? 0.020 v cc ? 0.005 v cc v v ol dout, /dout low voltage v cc ? 0.400 v cc ? 0.350 v cc ? 0.300 v z 0 single-ended output impedance 45 50 55 z i single-ended input impedance 45 50 55 ttl dc electrical characteristics v cc = 3.0 to 3.6v; t a = ?40c to +85c, typical values at v cc = 3.3v, t a = 25c. symbol parameter condition min. typ. max. units v ih /en input high voltage 2.0 v v il /en input low voltage 0.8 v i ih /en input high current v in = 2.7v v in = v cc 20 100 a i il /en input low current v in = 0.5v ? 0.3 ma v oh los output high level sourcing 100a 2.4 v v ol los output low level sinking 2ma 0.5 v notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional oper ation is not implied at conditions other than those deta iled in the operational sections of this data sheet. exposure to absolute maximum ra tings conditions for extended periods may affect device reliability. 2. the data sheet limits are not guaranteed if t he device is operated beyond the operating ratings. 3. package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the pcb . jb uses a 4-layer and ja in still air unless otherwise stated.
micrel, inc. SY88063AL september 2011 5 m9999-090911-b hbwhelp@micrel.com or (408) 955-1690 ac electrical characteristics v cc = 3.0 to 3.6v; r load = 50 ? to v cc ; t a = ?40c to +85c, typical values at v cc = 3.3v, t a = 25c. symbol parameter condition min. typ. max. units f in input data rate nrz data 1.25 12.5 gbps t r , t f output rise/fall time (20% to 80%) note 4 25 35 ps t jitter deterministic random note 5 note 6 10 1 ps pp ps rms f in = 12.5gbps 20 v id differential input voltage swing f in = 10.3gbps 10 1800 mv pp v od differential output voltage swing note 4 600 700 800 mv pp t off los release time note 9 100 500 ns t on los assert time note 9 100 500 ns los al low los assert level r loslvl = 10k? , note 7 9 11 13 mv pp los dl low los de-assert level r loslvl = 10k? , note 7 14 16 19 mv pp hsy l low los hysteresis r loslvl = 10k? , note 8 2 3.5 4 db los am medium los assert level r loslvl = 5k ? , note 7 16 18 21 mv pp los dm medium los de-assert level r loslvl = 5k ? , note 7 23 26 29 mv pp hsy m medium los hysteresis r loslvl = 5k ? , note 8 2 3 4 db los ah high los assert level r loslvl = 100 ? , note 7 40 46 54 mv pp los dh high los de-assert level r loslvl = 100 ? , note 7 61 68 74 mv pp hsy h high los hysteresis r loslvl = 100 ? , note 8 2 3 4 db b -3db 3db bandwidth 10 ghz a v(diff) differential voltage gain 38 db s 21 single-ended small-signal gain 26 32 db notes: 4. amplifier in limiting mode. input is a 200mhz square wave. 5. deterministic jitter measured using 10 gbps k28.5 pattern, v id = 60mv pp . 6. random jitter measured using 10gbps k28.7 pattern, v id = 60mv pp . 7. see ?typical operating characteristics? for a graph showing how to choose a particular r loslvl for a particular los assert and its associated de-assert amplitude. 8. this specification defines el ectrical hysteresis as 20log (los de-assert/los assert). the ratio between optical hysteresis a nd electrical hysteresis is found to vary between 1.5 and 2 depending upon the le vel of received optical power and rosa characteristics. base d on that ratio, the optical hysteresis corresponding to the electrical hysteresis range 1db-4.5 db, shown in the ac characteristics tabl e, will be 0.5db- 3db optical hysteresis. 9. in real world applications, the los re lease/assert time can be strongly influenced by the rc time constant of the ac-couplin g cap and the 50? input termination. to keep this time lo w, use a decoupling cap with the lowest value that is allowed by the data rate and the number of consecutive identical bits in t he application (typical values are in the range of 0.001f to 1.0f).
micrel, inc. SY88063AL september 2011 6 m9999-090911-b hbwhelp@micrel.com typical operating characteristics v cc = 3.3v, t a = 25c, r l = 50 ? to v cc -2v, unless otherwise stated. los assert/de-assert levels 1 10 100 0.1 1 10 100 loslvl resistor (k ? ) signal amplitude (mv) los hysteresis 1 2 3 4 5 6 0.1 1 10 100 loslvl resistor (k ? ) hysteresis (db) typical functional characteristics v cc = 3.3v, t a = 25c, r l = 50 ? to v cc -2v, unless otherwise stated. or (408) 955-1690
micrel, inc. SY88063AL september 2011 7 m9999-090911-b hbwhelp@micrel.com functional block diagram or (408) 955-1690
micrel, inc. SY88063AL september 2011 8 m9999-090911-b hbwhelp@micrel.com or (408) 955-1690 detailed description the SY88063AL is a high-sensitivity limiting post amplifier that operates from a single +3.3v power supply over temperatures from ?40c to +85c. the SY88063AL can process input signals up to 12.5gbps and as small as 20mv pp . it can also process signals as small as 10mv pp with data rates as high as 10.7gbps. figure 1 shows the accept able input ranges. the SY88063AL generates a los output signal that can be fed back to /en for output st ability in the absence of a signal at the input. loslvl sets the sensitivity of the input amplitude detection. by adjusting the voltage at the loslvl pin, either through an external voltage source or a resistor, the SY88063AL can trigger los on signals from 10mvpp to 70mvpp. input amplifier/buffer figure 2 shows a simplified schematic of the input stage. the high-sensitivity of the input amplifier allows signals as small as 10mv pp to be detected and amplified. the input amplifier allows input signals as large as 1800mv pp . input signals are amplified with a typically 38db differential voltage gain. since it is a limiting amplifier, the SY88063AL outputs typically 700mv pp voltage-limited waveforms for input signals that are greater than 7mv pp . output buffer the SY88063AL?s cml output buffer is designed to drive 50? lines and is internally terminated with 50 ? to vcc. figure 3 shows a schem atic of the output stage. loss-of-signal (los) the SY88063AL generates a chatter-free loss-of-signal (los) open-collector ttl output as shown in figure 4. los is used to determine if the input amplitude is too small to be considered as a valid input. los asserts high if the input amplitude falls below the threshold set by loslvl and de-asserts low otherwise. los can be fed back to the enable (/en) input to maintain output stability under a loss of signal conditi on. /en de-asserts low the true output signal without removing the input signals. typically, 3db los hysteresis is provided to prevent chattering. los-level set a programmable los level set pin (loslvl) sets the threshold of the input amplitude detection. connecting an external resistor between v cc and loslvl sets the voltage at loslvl. this voltage ranges from v cc to v cc -1.3v. the external resistor creates a voltage divider between v cc and v cc -1.3v, as shown in figure 5. hysteresis the SY88063AL provides typically 3db los electrical hysteresis, which is defined as 20log (vinlos-assert / vinlos-de-assert). since the relationship between the voltage out of the rosa to optical power at its input is linear, the optical hysteresis will be typically half of the electrical hysteresis reported in the datasheet, but in practice the ratio between electrical and optical hysteresis is found to be within the range 1.5-1.8. digital offset correction the SY88063AL features automatic digital offset correction function. the conventional analog offset correction is susceptible to offset drift from long input patterns of exclusively 0s or 1s. the SY88063AL is not limited by the input patterns. this feature will automatically detect any existing offset and lock the offset correction. the offs et correction will not be applied to large input signals that place the outputs into limiting mode.
micrel, inc. SY88063AL september 2011 9 m9999-090911-b hbwhelp@micrel.com timing diagram figure 1. v is and v id definition or (408) 955-1690
micrel, inc. SY88063AL september 2011 10 m9999-090911-b hbwhelp@micrel.com structure recommendations figure 2. simplified input structure figure 3. simplified output structure figure 4. los output structure figure 5. los lvl setting circuit or (408) 955-1690
micrel, inc. SY88063AL september 2011 11 m9999-090911-b hbwhelp@micrel.com package information 16-pin (3mm 3mm) qfn micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http://www.micrel.com micrel makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relati ng to the sale and/or use of micrel products i ncluding liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. mic ct us r rel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a produ can reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a si gnificant injury to the er. a purchaser?s use or sale of micrel products for use in life support appliances, devices or systems is a purchaser?s own risk and purchase agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2010 micrel, incorporated. or (408) 955-1690

▲Up To Search▲

Price & Availability of SY88063AL

	To Download SY88063AL Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .