az88943 high-speed limiting post amplifier 1630 s. stapley dr., suite 125 ? mesa, arizona 85204 ? usa ? (480) 962-5881 ? fax (480) 890-2541 www.azmicrotek.com arizona microtek, inc. features ? up to 2.5gbps operation ? differential pecl inputs ? differential pecl outputs ? open drain ttl/cmos sd output ? ttl/cmos enable input ? high-speed sige process description the az88943 is a limiting post amplifier usable at data rates up to 2.5gbps. it is ideal for use as a post amplifier following a transimpedance amplifier. the az88943 contains a programmable signal detect func tion to determine when the input signal is present. this information can be used with the /en input pin to disable the output under loss of signal conditions. the detect threshold can be set with a resistor divider between v cc and v ref . the sd output is an open drain compatible with cmos and ttl. the outputs produce standard pecl 100k voltage compensated levels. block diagram d in /d in d out /d out /en sd sd lvl v ref package availability package part no. marking tssop 10 az88943t az88943 tssop 10 t&r AZ88943TR1 az88943 tssop 10 t&r az88943tr2 az88943 /en d in /d in sd lvl v ref v cc d out /d ou t gnd 1 3 2 4 5 tssop-10 10 8 9 7 6 sd pin description pin function d in , /d in differential inputs d out , /d out pecl outputs /en output enable sd lvl signal detect threshold sd sd output v ref reference voltage output v cc positive voltage gnd ground pinout assignment
az88943 february 2002 * rev - 0 www.azmicrotek.com 2 absolute maximum ratings are those values beyond which device life may be impaired symbol character value unit v cc dc supply voltage (referenced to gnd) 4.5 v t a operating temperature range (in free-air) -40 to +85 c t stg storage temperature range -65 to +125 c d in , /d in input voltage 0 to v cc v /en input voltage 0 to v cc v los lvl input voltage 0 to v cc v v ref output voltage v cc -2v to v cc v d out , /d out output voltage v cc -2v to v cc v dc characteristics (v cc = 3.0v to 3.6v, r load = 50 ? to v cc -2v) -40 c 0 c 25 c 85 c symbol characteristic min max min max min typ max min max unit i ee power supply current 1 40 40 30 40 45 ma v oh output high voltage v cc - 1085 v cc - 880 v cc - 1025 v cc - 880 v cc - 1025 v cc - 955 v cc - 880 v cc - 1025 v cc - 880 mv v ol output low voltage v cc - 1830 v cc - 1555 v cc - 1810 v cc - 1620 v cc - 1810 v cc - 1705 v cc - 1620 v cc - 1810 v cc - 1620 mv v ih /en input high voltage 2.0 2.0 2.0 2.0 mv v il /en input low voltage 0.8 0.8 0.8 0.8 mv v ol sd output low voltage 2 0.5 0.5 0.5 0.5 v v ref reference voltage v cc - 1.38 v cc - 1.26 v cc - 1.38 v cc - 1.26 v cc - 1.38 v cc - 1.26 v cc - 1.38 v cc - 1.26 v i ih /en input high current 100 100 100 100 a v cmr common mode range gnd+2 v cc gnd+2 v cc gnd+2 v cc gnd+2 v cc v 1. no output load. 2. i ol = +2ma. ac characteristics (v cc = 3.0v to 3.6v, r load = 50 ? to v cc -2v) -40 c 0 c 25 c 85 c symbol characteristic min max min max min typ max min max unit v id input voltage range 5 1800 5 1800 5 1800 5 1800 mv t r / t f rise/fall time 150 150 150 150 ps v od diff v id =15 mvp-p out v id =5 mvp-p 600 200 mvp-p hys sd hysteresis 2 8 2 8 2 4.6 8 2 8 db t onl sd release time minimum input 0.5 0.5 0.2 0.5 0.5 s t onh sd release time maximum input 0.5 0.5 0.2 0.5 0.5 s t offl sd assert time 0.5 0.5 0.1 0.5 0.5 s v sr sd sensitivity range 5 50 5 50 5 50 5 50 mvp-p
az88943 february 2002 * rev - 0 www.azmicrotek.com 3 sd v cc > 4.7k ? sd lvl v ref v cc r1 r2 sd output from transimpedance amplifier { 0.1 f f 0.1 d in /d in v ref f 0.1 50? 50? { differential input configuration sd lvl circuit notes: sd lvl = v cc ? 1.32v + r1 + r2 2.6k ? r2 x 1.32v r1 + r2
az88943 february 2002 * rev - 0 www.azmicrotek.com 4 package diagram tssop 10 millimeters dim min max a 1.10 a 1 0.05 0.15 a 2 0.80 0.95 a 3 0.25 b p 0.15 0.30 c 0.15 0.23 d 1 2.90 3.10 e 2 2.90 3.10 e 0.50 h e 4.80 5.00 l 0.95 l p 0.40 0.70 v 0.10 w 0.10 y 0.10 z 0.34 0.67 0 o 6 o n otes: 1. dimensions d and e do not include mold protrusion. 2. maximum mold protrusion for d is 0.15mm. 3. maximum mold protrusion for e is 0.25mm.
az88943 february 2002 * rev - 0 www.azmicrotek.com 5 arizona microtek, inc. reserves the right to change circuitry a nd specifications at any time without prior notice. arizona mic rotek, inc. makes no warranty, representation or guarant ee regarding the suitability of its products for any particular purpose, nor does a rizona microtek, inc. assume any liability arising out of the applica tion or use of any product or ci rcuit and specifically disclaims any and all liability, including without limitation special, consequential or inci dental damages. arizona microtek, inc. does not convey a ny license rights nor the rights of others. arizona microtek, inc. products are not designed, intended or authorized for use as component s in systems intended to support or sustain life, or for any other applicati on in which the failure of the arizona microtek, inc. product co uld create a situation where personal injury or death may occur. should bu yer purchase or use arizona microtek, inc. products for any such unintended or unauthorized application, buyer shall indemnify a nd hold arizona microtek, inc. a nd its officers, employees, subs idiaries, affiliates, and distributor s harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim al leges tha t arizona microtek, inc. was negligent regarding the design or manufacture of the part.
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